Jeremy Fearn Power Upgrade

I am considering purchasing a power upgrade of some sort for my TD5 Disco, I
have heard of Jeremy Fearn and he seems pretty respected. The kit on offer
is an upgraded intercooler plus power chip conversion which ups the bhp to
over 190 from the standard 136. At £1000 is it a good buy or are there other
cheaper options that will do the job?

Andy

<2003 Discovery TD5 ES Manual>

Andy Hi,

I would suggest you also speak with Andy at Allisport www.allisport.com
His direct e-mail address is [email protected]

I bought my first intercooler made by him back in 1996 when he was working
for another intercoolers specialist and I have been in touch with Andy since
then.
The Land Rover Club of Greece and I on a personal basis have been
cooperating with him for many years now and he really does know how to
extract more bhp and torque from your Landy (and other cars also)

His kits are cheaper than most of other tuners but his workmanship is up to
the lever of objects of art.

Give him my regards of you contact him.

Take care
Pantelis Giamarellos
LAND ROVER CLUB OF GREECE


"Andrew Cooke" <[email protected]> wrote in message
news:[email protected]...
> I am considering purchasing a power upgrade of some sort for my TD5 Disco,
I
> have heard of Jeremy Fearn and he seems pretty respected. The kit on offer
> is an upgraded intercooler plus power chip conversion which ups the bhp to
> over 190 from the standard 136. At £1000 is it a good buy or are there
other
> cheaper options that will do the job?
>
> Andy
>
> <2003 Discovery TD5 ES Manual>
>
>

so Andrew Cooke was, like...
> I am considering purchasing a power upgrade of some sort for my TD5
> Disco, I have heard of Jeremy Fearn and he seems pretty respected.
> The kit on offer is an upgraded intercooler plus power chip
> conversion which ups the bhp to over 190 from the standard 136. At
> £1000 is it a good buy or are there other cheaper options that will
> do the job?

Just had his chip and intercooler upgrade done on my 300Tdi Disco. Quite a
lot of money, and a modest though useful improvement in power, although less
than I hoped it would be. Best improvement is in towing, where it will now
hold top gear (it's an auto) for much longer. Workmanship is very good, and
a very tidy installation.

He will want to test drive the car afterwards, and you may not like the way
he does it. He certainly won't be getting the keys to any of my vehicles
again.

--
Rich
==============================
Disco 300 Tdi auto
S2a 88" SW
Tiggrr (V8 trialler)

On 2005-09-26, Richard Brookman <[email protected]> wrote:

> He will want to test drive the car afterwards, and you may not like
> the way he does it. He certainly won't be getting the keys to any
> of my vehicles again.

If what you are concerned about is him putting a lot of wellie in, how
else is he supposed to test a power upgrade? Considering that there's
a new intercooler, new tubing and new pump settings, it's got to be
tested otherwise you might find a tube blowing off while towing a
heavy load up a hill.

--
For every expert, there is an equal but opposite expert

"Ian Rawlings" <[email protected]> wrote in message
news:[email protected]...
> On 2005-09-26, Richard Brookman <[email protected]> wrote:
>
>> He will want to test drive the car afterwards, and you may not like
>> the way he does it. He certainly won't be getting the keys to any
>> of my vehicles again.
>
> If what you are concerned about is him putting a lot of wellie in, how
> else is he supposed to test a power upgrade? Considering that there's
> a new intercooler, new tubing and new pump settings, it's got to be
> tested otherwise you might find a tube blowing off while towing a
> heavy load up a hill.
>

He could put it on a dynamometer to do a proper test. Perhaps that is what
he does. This would indeed seem 'cruel' to the gentler folk among us.

Huw

On 2005-09-26, Huw <hedydd> wrote:

> He could put it on a dynamometer to do a proper test. Perhaps that is what
> he does. This would indeed seem 'cruel' to the gentler folk among us.

Could do, but you'd get people moaning about that too, and also bear
in mind that for the product to work, it needs the airflow so you'd
need the truck to be moving. You could try blasting it with fans that
can generate up to 90 MPH winds, but you'd have to match the fan speed
to the vehicle speed, as otherwise at lower speeds you'd be getting
more cooling than you would in real life etc etc etc

Basically just get in it and put the wellie down!

--
For every expert, there is an equal but opposite expert

On Mon, 26 Sep 2005 22:15:01 +0100, Ian Rawlings
<[email protected]> wrote:

>If what you are concerned about is him putting a lot of wellie in, how
>else is he supposed to test a power upgrade?

Plenty ways. I think Richard was more concerned about the driving
technique.

Imagine a sort of hyper Alan Titchmarsh, who obviosuly knows his own
'back garden' and insists upon driving the lawnmower at full pelt
around the thorny rosebed - whilst blindfold - with you strapped to
the front, naked...


--
"We have gone from a world of concentrated knowledge and wisdom to one
of distributed ignorance. And we know and understand less while being
increasingly capable." Prof. Peter Cochrane, formerly of BT Labs
In memory of Brian {Hamilton Kelly} who logged off 15th September 2005

"Ian Rawlings" <[email protected]> wrote in message
news:[email protected]...
> On 2005-09-26, Huw <hedydd> wrote:
>
>> He could put it on a dynamometer to do a proper test. Perhaps that is
>> what
>> he does. This would indeed seem 'cruel' to the gentler folk among us.
>
> Could do, but you'd get people moaning about that too, and also bear
> in mind that for the product to work, it needs the airflow so you'd
> need the truck to be moving.

Does the vehicle fan not work then?




You could try blasting it with fans that
> can generate up to 90 MPH winds, but you'd have to match the fan speed
> to the vehicle speed, as otherwise at lower speeds you'd be getting
> more cooling than you would in real life etc etc etc

I think you misundertand how the intercooler works. It is not dependant on
vehicle speed, especially on a LR which might be towing 4 tons hard up a
long mountain hill in low ratio.


>
> Basically just get in it and put the wellie down!
>

A driver can feel the extra power in this way but he doesn't need to be
rough while doing it and it will not provide an objective measure for
comparison. Not that I am against this, but a thousand quid would indicate a
better measurement. I chipped my own X5 and Range Rover in this way and am
quite satisfied with the extra performance and [surprisingly] economy. Since
I did it myself and it cost less than £400, I don't care that I haven't got
a proper measure of the increased power.

Huw

On 2005-09-27, Mother <"@ {mother} @"@101fc.net> wrote:

> Plenty ways. I think Richard was more concerned about the driving
> technique.

Sounds like "Fearn" is a concatenation of "Fear Nothing"..

> Imagine a sort of hyper Alan Titchmarsh, who obviosuly knows his own
> 'back garden' and insists upon driving the lawnmower at full pelt
> around the thorny rosebed - whilst blindfold - with you strapped to
> the front, naked...

That's the kind of imagery that makes me mess my pants, whether front
or rear I'm not prepared to reveal.


--
For every expert, there is an equal but opposite expert

On Tue, 27 Sep 2005 10:23:03 +0100, Mother <"@ {mother} @"@101fc.net>
scribbled the following nonsense:

>On Mon, 26 Sep 2005 22:15:01 +0100, Ian Rawlings
><[email protected]> wrote:
>
>>If what you are concerned about is him putting a lot of wellie in, how
>>else is he supposed to test a power upgrade?
>
>Plenty ways. I think Richard was more concerned about the driving
>technique.
>
>Imagine a sort of hyper Alan Titchmarsh, who obviosuly knows his own
>'back garden' and insists upon driving the lawnmower at full pelt
>around the thorny rosebed - whilst blindfold - with you strapped to
>the front, naked...

Picture would have been better if you had suggested Charlie
Dimmock.......
--

Simon Isaacs

Peterborough 4x4 Club Newsletter Editor and Webmaster
Green Lane Association (GLASS) Financial Director
101 Ambi, undsergoing camper conversion
Part owner of 1976 S3 LWT, Fully restored, ready for sale! Make me an offer!
Suzuki SJ410 (Wife's) 3" lift kit fitted, body shell now restored and mounted on chassis, waiting on a windscreen and MOT
Series 3 88" Rolling chassis...what to do next
1993 200 TDi Discovery
1994 200 TDi Discovery body sheel, being bobbed and modded.....
1979 Range Ruster body shell and chassis

On Tue, 27 Sep 2005 11:08:11 +0100, "Huw"
<hedydd[nospam]@tiscali.co.uk> wrote:

>I think you misundertand how the intercooler works. It is not dependant on
>vehicle speed, especially on a LR which might be towing 4 tons hard up a
>long mountain hill in low ratio.

vehicle speed will affect the intercoolers operation.

The point of the intercooler is to cool the air running through it.
This obviously works better when the exterior of the IC is cooler.
This will stay cooler when there is more of a draft over it - such as
the one caused by travelling faster!

I'm not saying that you have to go at 90 to get the best out of it! -
depending on the design and positioning of the IC it probably reaches
a maximum efficiency level at a slower speed than that.

With an intercooled car, you can increase perfomance by fitting a
proper frount mounted IC (so it gets more airflow), or by fitting
stuff like IC misting kits (where water is sprayed over the outside of
the IC to keep it cooler and get rid of the heat better)

On or around Tue, 27 Sep 2005 10:23:03 +0100, Mother <"@ {mother}
@"@101fc.net> enlightened us thusly:

>On Mon, 26 Sep 2005 22:15:01 +0100, Ian Rawlings
><[email protected]> wrote:
>
>>If what you are concerned about is him putting a lot of wellie in, how
>>else is he supposed to test a power upgrade?
>
>Plenty ways. I think Richard was more concerned about the driving
>technique.
>
>Imagine a sort of hyper Alan Titchmarsh, who obviosuly knows his own
>'back garden' and insists upon driving the lawnmower at full pelt
>around the thorny rosebed - whilst blindfold - with you strapped to
>the front, naked...

If he'd been driving my vehicle like that, with me in it, I'd have been
inclined to demand that he stop pronto, let me drive, then while changing
over from passenger to driver's seat, accidentally lock the cnut out and
drive off.

The above, naturally assumes a factual account of the incident. I have no
reason to disbelieve what I was told, however.


Some years back I was in uni in Aber. A certain gentleman was the tranport
officer for Aber Rag, and I was one of their drivers - they like mature
students as they're old enough to go on the insurance when they're in the
first year, and thus not too busy. I was once driven somewhere by said chap
in one of the transit minibuses, and in my honest opinon, he drove far too
fast, on a single-track winding road. He was also heard to boast of being
able to drive, in a laden minibus, from Aberystwyth to the (Severn) bridge
in 2 hours 5 minutes. I could do the same in 2 and a half hours, and I
wasn't going slowly. Someone mentioned this boast, to which I said that he
was a fecking nutter, OWTTE. This was reported back to him and he took a
dim view; But I stand by it: on the roads he'd have been using, in the
dark, mostly, he was at least some of the time gogin sufficiently fast that
he'd not have been able to stop if there had been something in the road
around one of the many corners; and not everything that blocks the road has
lights on it.

He also called into question my night vision (admittedly not excellent but
adequate) as a result of the fact that I had re-set the headlamp aim on one
of the buses (after no action was forthcoming having made an official
complaint about same) which was producing a shorter beam pattern on main
beam than it should have been on dip. He made the point that it wasn't my
job (true), that it had then had to be taken to the garage (also true) and
that it didn't need adjusting in the first place (definitely false, I know
what headlamp alignment is meant to look like). As a result they lost a
driver.

I wrote 'em a terse letter commenting that I wasn't so irresponsible as to
drive a busload of people around if I knew that my vision wasn't adequate,
never got any reply, though. Man was an arse.

--
Austin Shackles. www.ddol-las.net my opinions are just that
"Any man's death diminishes me, because I am involved in Mankind; and
therefore never send to know for whom the bell tolls, it tolls for thee"
John Donne (1571? - 1631) Devotions, XVII

"Tom Woods" <[email protected]> wrote in message
news:[email protected]...
> On Tue, 27 Sep 2005 11:08:11 +0100, "Huw"
> <hedydd[nospam]@tiscali.co.uk> wrote:
>
>>I think you misundertand how the intercooler works. It is not dependant on
>>vehicle speed, especially on a LR which might be towing 4 tons hard up a
>>long mountain hill in low ratio.
>
> vehicle speed will affect the intercoolers operation.
>
> The point of the intercooler is to cool the air running through it.
> This obviously works better when the exterior of the IC is cooler.
> This will stay cooler when there is more of a draft over it - such as
> the one caused by travelling faster!
>
> I'm not saying that you have to go at 90 to get the best out of it! -
> depending on the design and positioning of the IC it probably reaches
> a maximum efficiency level at a slower speed than that.
>
> With an intercooled car, you can increase perfomance by fitting a
> proper frount mounted IC (so it gets more airflow), or by fitting
> stuff like IC misting kits (where water is sprayed over the outside of
> the IC to keep it cooler and get rid of the heat better)
>

You are living in a fantasy world of impracticality.
In the real world of engine performance, air to air intercoolers are used by
very slow moving and even stationary engines which regularly pull full power
at full revs while stationary for hours on end.
The intercooled discovery would pull its full power at whatever ground
speed.

Huw

On 2005-09-27, Huw <hedydd> wrote:

> Does the vehicle fan not work then?

Not as well as driving the thing, so you'll get less cooling and
therefore less power. It's a problem that intercooled turbo sports
cars have on dyno setups, you don't get the full power as you don't
get enough cool air. I know various Lotus Esprit owners who've tried
their cars on normal dyno setups and they don't get the power they
should or indeed the exhaust cooling, which is quite serious on a car
on which you can look at late at night after a fast drive and see the
glow from the exhausts on the ground underneath the car.. One chap's
car almost caught fire on a dyno because of the lack of cooling air
flowing through the engine bay!

> I think you misundertand how the intercooler works. It is not
> dependant on vehicle speed, especially on a LR which might be towing
> 4 tons hard up a long mountain hill in low ratio.

It works at low speeds, but not as well as at high speeds. The faster
you go, the more cooling you get.

> A driver can feel the extra power in this way but he doesn't need to
> be rough while doing it and it will not provide an objective measure
> for comparison.

I don't know what Mr. Fearn did, but Martyn suggests he drives the
road hard, which is probably what scared the owner, personally I hate
being a passenger in a fast-moving car so I can sympathise!

As for objectivity, if you know the road, have driven it loads of
times and know the vehicles, you'll be able to tell if it's working
OK. Not to within 1-2% I know, but I was able to spot 20BHP missing
on a 290BHP sports car through just driving it. As long as you can
more or less rule out other factors you can judge fairly well.

--
For every expert, there is an equal but opposite expert

"Ian Rawlings" <[email protected]> wrote in message
news:[email protected]...
> On 2005-09-27, Huw <hedydd> wrote:
>
>> Does the vehicle fan not work then?
>
> Not as well as driving the thing, so you'll get less cooling and
> therefore less power.

You might get a hotter exhaust gas temperature but these things are meant to
run within certain limits. A Land Rover engine will maintain high power at
very slow forward speeds as the intercooler will still exchange heat with an
airflow well below maximum.
You actually think that full power can only be obtained if the vehicle is
travelling fast or into a headwind?



It's a problem that intercooled turbo sports
> cars have on dyno setups, you don't get the full power as you don't
> get enough cool air. I know various Lotus Esprit owners who've tried
> their cars on normal dyno setups and they don't get the power they
> should or indeed the exhaust cooling, which is quite serious on a car
> on which you can look at late at night after a fast drive and see the
> glow from the exhausts on the ground underneath the car.. One chap's
> car almost caught fire on a dyno because of the lack of cooling air
> flowing through the engine bay!

My dear chap, we are not talking of tuning anywhere near the point where
this would even be a minor issue on a Land Rover.




>
>> I think you misundertand how the intercooler works. It is not
>> dependant on vehicle speed, especially on a LR which might be towing
>> 4 tons hard up a long mountain hill in low ratio.
>
> It works at low speeds, but not as well as at high speeds. The faster
> you go, the more cooling you get.

It can only cool as much as ambient air temperature will let it. The surface
area is as, and in LR's case is deffinately more important than ultimate air
flow although the air flow will be maintained within acceptable limits by
the engine cooling fan. This is why Fearns fit a bigger intercooler. For
normal use, a similar level of tuning would be quite reliably obtained with
just the standard intercooler and if high speeds were the primary use then
the very high airflow would certainly negate the reason for fitting a bigger
intercooler.

The main job of the intercooler is to lower the air temperature of an
engine at full boost in order to make it denser so that more oxygen is
ingested so as to be able to efficiently burn more fuel per combustion
cycle.
Another major use for the intercooler is to lower combustion temperature
combined with [sometimes] cooled exhaust gas recirculation [reduced oxygen]
so as to reduce emissions of Nitrous Oxide to below legal limits.

Huw


>
>> A driver can feel the extra power in this way but he doesn't need to
>> be rough while doing it and it will not provide an objective measure
>> for comparison.
>
> I don't know what Mr. Fearn did, but Martyn suggests he drives the
> road hard, which is probably what scared the owner, personally I hate
> being a passenger in a fast-moving car so I can sympathise!
>
> As for objectivity, if you know the road, have driven it loads of
> times and know the vehicles, you'll be able to tell if it's working
> OK. Not to within 1-2% I know, but I was able to spot 20BHP missing
> on a 290BHP sports car through just driving it. As long as you can
> more or less rule out other factors you can judge fairly well.
>
> --
> For every expert, there is an equal but opposite expert

so Ian Rawlings was, like...
> On 2005-09-26, Richard Brookman <[email protected]> wrote:
>
>> He will want to test drive the car afterwards, and you may not like
>> the way he does it. He certainly won't be getting the keys to any
>> of my vehicles again.
>
> If what you are concerned about is him putting a lot of wellie in, how
> else is he supposed to test a power upgrade? Considering that there's
> a new intercooler, new tubing and new pump settings, it's got to be
> tested otherwise you might find a tube blowing off while towing a
> heavy load up a hill.

No, I'm not concerned about a bit of hard driving to test a power upgrade -
it's the obvious thing to do. What concerned me was the way he drove. The
website says that "Vehicles are rolling road tested before and after the
conversion work". However, when I got there he told me that the rolling
road was "unavailable". After the work was complete, he invited me (but not
my wife) to join him for a "test drive". He later explained that "I don't
often scare husbands, but I usually scare wives" which kind of set the tone.
He drove the Disco so fast and aggressively over a 10-mile moorland route
that I admit he had me pretty spooked. Booting it up a long hill two feet
behind a fast 205Gti was one thing - he sure demonstrated that there was a
bit more power, and that would have been enough for me. But the rest of the
drive was pretty awful. Blind bends at speed, overtaking a lorry on a long
and narrow straight with the Disco's offside wheels in the dirt - an
overtake which included a crossroads with a vehicle starting to pull out
from the side road - I actually said at that point "Jeremy, that's enough".
His reply was "What's the matter, we aren't even doing 70". Through a
village and past a school at 40. Four-wheel slides around blind bends with
high hedges either side (on my brand new BFGs!). I could go on. It's only
the second time in my life I have been really frightened in a vehicle
(there's a long story behind the other time). Eventually I made the point
that I was satisfied with the work and I didn't need to see my Disco
thrashed any further, and he slowed down a bit.

The whole thing ****ed me off rather.

I expect that he thinks this will impress customers, but he came across to
me as a bit of a show-off, and a dangerous show-off at that. That's what I
meant when I said he would never get my car keys again. If I knew him
socially, I would never get in a car with him at the wheel. It's a shame,
because he's a fine engineer and the workmanship is excellent. But if I
wanted another intercooler fitted to a vehicle, I would go somewhere else.
The guy at Allisport seems like a nice feller.

Just my opinion, others may disagree, YMMV and all that.

--
Rich
==============================
Disco 300 Tdi auto
S2a 88" SW
Tiggrr (V8 trialler)

On 2005-09-27, Huw <hedydd> wrote:

> You actually think that full power can only be obtained if the
> vehicle is travelling fast or into a headwind?

Well, an air-to-air intercooler can at best bring the air down to
ambient temperature after it's been heated by the heat from the turbo
and the compression of the air. The faster you go the closer you'll
get to that, but of course once it's as low as you can go it won't go
any lower and a larger intercooler will get there faster than the
stock intercooler. So I certainly don't deny that there's a point at
which more speed won't produce more power but I doubt that point will
be reached by the engine fan sucking air through the intercooler vanes.

> My dear chap, we are not talking of tuning anywhere near the point
> where this would even be a minor issue on a Land Rover.

Indeed, I know, but it's the same issue, and as I said I don't
believe even a large Fearn intercooler will reach peak operation while
the truck is stationary.

> It can only cool as much as ambient air temperature will let it. The
> surface area is as, and in LR's case is deffinately more important
> than ultimate air flow although the air flow will be maintained
> within acceptable limits by the engine cooling fan. This is why
> Fearns fit a bigger intercooler. For normal use, a similar level of
> tuning would be quite reliably obtained with just the standard
> intercooler and if high speeds were the primary use then the very
> high airflow would certainly negate the reason for fitting a bigger
> intercooler.

Yep, agree 100% but what we're talking about is whether the
intercooler can get the compressed air down to ambient or as close as
it will go when stationary on a dyno, which I doubt very much it will.

--
For every expert, there is an equal but opposite expert

"Ian Rawlings" <[email protected]> wrote in message
news:[email protected]...
> On 2005-09-27, Huw <hedydd> wrote:
>
>> You actually think that full power can only be obtained if the
>> vehicle is travelling fast or into a headwind?
>
> Well, an air-to-air intercooler can at best bring the air down to
> ambient temperature after it's been heated by the heat from the turbo
> and the compression of the air. The faster you go the closer you'll
> get to that, but of course once it's as low as you can go it won't go
> any lower and a larger intercooler will get there faster than the
> stock intercooler. So I certainly don't deny that there's a point at
> which more speed won't produce more power but I doubt that point will
> be reached by the engine fan sucking air through the intercooler vanes.
>
>> My dear chap, we are not talking of tuning anywhere near the point
>> where this would even be a minor issue on a Land Rover.
>
> Indeed, I know, but it's the same issue, and as I said I don't
> believe even a large Fearn intercooler will reach peak operation while
> the truck is stationary.
>
>> It can only cool as much as ambient air temperature will let it. The
>> surface area is as, and in LR's case is deffinately more important
>> than ultimate air flow although the air flow will be maintained
>> within acceptable limits by the engine cooling fan. This is why
>> Fearns fit a bigger intercooler. For normal use, a similar level of
>> tuning would be quite reliably obtained with just the standard
>> intercooler and if high speeds were the primary use then the very
>> high airflow would certainly negate the reason for fitting a bigger
>> intercooler.
>
> Yep, agree 100% but what we're talking about is whether the
> intercooler can get the compressed air down to ambient or as close as
> it will go when stationary on a dyno, which I doubt very much it will.
>

The aim is not to bring the temperature down to ambient. That would never
happen practically. I can assure you that there are plenty of examples of
heavy stationary engines and wheeled vehicles which are intercooled and
which can be operated over sustained periods at full power while stationary.
The major factor in fitting massive intercoolers into the next generation of
these engines is not the maintenance or improvement of power output but
purely the need to meet ever more stringent emission regulations. I maintain
that the Land Rover engine can maintain sustained high power output with no
detriment at lower ground speeds. There will be far more of an effect from
fuel heating and expanding over a long working day which is why my TD6 has a
fairly large and prominent fuel cooler fitted.
To illustrate that ambient is not the aim, I should say that it is generally
accepted that water to air intercoolers are efficient and commonly fitted.
The liquid coolant never gets anywhere near ambient. The air temperature
after the turbo we are concerned with is very hot and is still fairly hot
after the intercooler. I have figures somewhere, though lord knows where.

Huw

On 2005-09-27, Richard Brookman <[email protected]> wrote:

> Blind bends at speed, overtaking a lorry on a long and narrow
> straight with the Disco's offside wheels in the dirt - an overtake
> which included a crossroads with a vehicle starting to pull out from
> the side road - I actually said at that point "Jeremy, that's
> enough". His reply was "What's the matter, we aren't even doing
> 70". Through a village and past a school at 40. Four-wheel slides
> around blind bends with high hedges either side (on my brand new
> BFGs!).

Ouch, no I think I'd be pretty narked about that too! Personally I
hate being driven anyway even short distances.

Worst I ever had was when going to Goodwood Revival in a series 2, a
friend of mine was at the wheel, no seatbelts, dressed up in 50's army
gear, a wall of metal in front of me and when he canes it round a
corner on a narrow road and someone coming the other way doesn't move
over, he just drove all four wheels along the bank of the road at 40+
without being able to see if there were any stumps, ditches or other
obstructions. He's not lived that one down yet!

Next time I'm driven I'm likely to be passenger in a 1940's
Fraser-Nash wooden-framed sports car on skinny tyres, no seatbelts,
weak drum brakes and no rear diff so the back skips out on almost
every corner.. That'll be fun :-|

--
For every expert, there is an equal but opposite expert

On Tue, 27 Sep 2005 19:00:45 +0100, "Huw"
<hedydd[nospam]@tiscali.co.uk> wrote:

>You are living in a fantasy world of impracticality.
>In the real world of engine performance, air to air intercoolers are used by
>very slow moving and even stationary engines which regularly pull full power
>at full revs while stationary for hours on end.
>The intercooled discovery would pull its full power at whatever ground
>speed.

Do turbo diesel engines differ significantly from turbo'd petrol ones?
All my experience is with petrol ones (does the difference in the
amount of air flow in/out of diesel/petrol engines make the effects of
an IC different?).
..
The intercooler simply tries to cool the interior air down towards the
temperature of the exterior air. It will be more effective when the
exterior air is cooler.

The exterior air is obviously going to be hotter if the car is
stationary. As soon as it warms up (which it will if there is no air
movement), the intercooler will become less efficient.
If the car is moving then the intercooler should have a constant
supply of cooler air and thus be more effective as the temperature
difference between externally and internally will be greater.

I've got a saab turbo. Adding an IC meant the engine could take more
boost before it got knock.
My IC is not front mounted.. When I drove around with my headlight
removed to give the IC some proper air flow, I could get even more
boost before knock happened.
I know people who have adding Front mounted intercoolers, IC misting
kits to enable them to get even more boost pressure - so I was under
the impression that if the intercooler stays cooler (which a moving
one will more so than a stationary one - just use the coolant radiator
as an example) it will work better and give you more performance.

There is a post here that mentions how an intercooler gets hot when
its in use without any additional cooling -
(http://www.aquamist.co.uk/phpBB2/viewtopic.php?t=12).