V8 cam, is Badger about?

Badger,
A couple of weeks ago you suggested the Real Steel Viper Cyclone cam. I have
their catalogue but its not in it. I have emailed them several times but
they dont reply.
Do you have any details of this camshaft?
Thank you
Richard

"Richard" <richardsemail [email protected]> wrote in message
news:[email protected]...
> Badger,
> A couple of weeks ago you suggested the Real Steel Viper Cyclone cam. I
> have their catalogue but its not in it. I have emailed them several times
> but they dont reply.

Their one major failing as a company, IMO. Phoning them is preferable.

> Do you have any details of this camshaft?
> Thank you
> Richard

It's not in the catalogue yet, should be in next reprint, or so I am told.
I never bothered chucking one up with a DTI yet so I can't quote timing
figures or valve lift etc, but what I can tell you is that it was designed
specifically for the 3.9 (and above) EFI engines, and allegedly works in the
3.5 EFI as well, possibly with a rising rate fuel pressure regulator. It was
designed to maintain idle torque and thus be suitable for automatics as
well, the test figures their cam man quoted to me were as follows:-
253lbf.ft @ 3500rpm, 256.7lbf.ft @ 4000rpm. Quoted bhp increase was 25bhp,
no rpm quoted. I would imagine that these test figures were derived with at
least a free-flow air filter. Real Steel part number is DW252 and the cost,
last one I bought, was £127.39.
I've fitted this cam to 3 different 3.9 engines now (2 standard and one
gas-flowed and fitted to a series1 with a Borg-Warner 66 Jag autobox!!),
with good results.
Badger.

Thank you for the info.
Ours is a standard 3.9i in an automatic Discovery. You mention a free-flow
air filter, ours runs on LPG and have read that you shouldn't use a free
flow (I assume you mean a K&N type?) as the air velocity is too fast for the
LPG to mix properly. Unless you know otherwise?
Thanks again
Richard
http://www.richardsrovers.pwp.blueyonder.co.uk/



"Badger" <[email protected]> wrote in message
news:[email protected]...
>
> "Richard" <richardsemail [email protected]> wrote in
> message news:[email protected]...
>> Badger,
>> A couple of weeks ago you suggested the Real Steel Viper Cyclone cam. I
>> have their catalogue but its not in it. I have emailed them several times
>> but they dont reply.
>
> Their one major failing as a company, IMO. Phoning them is preferable.
>
>> Do you have any details of this camshaft?
>> Thank you
>> Richard
>
> It's not in the catalogue yet, should be in next reprint, or so I am told.
> I never bothered chucking one up with a DTI yet so I can't quote timing
> figures or valve lift etc, but what I can tell you is that it was designed
> specifically for the 3.9 (and above) EFI engines, and allegedly works in
> the 3.5 EFI as well, possibly with a rising rate fuel pressure regulator.
> It was designed to maintain idle torque and thus be suitable for
> automatics as well, the test figures their cam man quoted to me were as
> follows:- 253lbf.ft @ 3500rpm, 256.7lbf.ft @ 4000rpm. Quoted bhp increase
> was 25bhp, no rpm quoted. I would imagine that these test figures were
> derived with at least a free-flow air filter. Real Steel part number is
> DW252 and the cost, last one I bought, was £127.39.
> I've fitted this cam to 3 different 3.9 engines now (2 standard and one
> gas-flowed and fitted to a series1 with a Borg-Warner 66 Jag autobox!!),
> with good results.
> Badger.
>

"Richard" <richardsemail [email protected]> wrote in message
news:[email protected]...
> Thank you for the info.
> Ours is a standard 3.9i in an automatic Discovery. You mention a free-flow
> air filter, ours runs on LPG and have read that you shouldn't use a free
> flow (I assume you mean a K&N type?) as the air velocity is too fast for
> the LPG to mix properly. Unless you know otherwise?
>
Hahahahaha, what a load of rumour-codswallop and claptrap! I really wish I'd
had a fiver for every time I've heard that, the change in airflow velocity
is only the same percentage as the increased volumetric efficiency (and
hence more or less the power difference expressed as a %) of the engine with
the new filter fitted. I'd guess that a simple filter change would never
give an airflow increase of say, more than 5 or 6%.
The reason a lot of people experience backfires on LPGwith cone-type filters
is that they have them mounted in such a way as to allow them to be effected
by ram-air weakening the mixture. If you are at all worried then replace the
std filter element with a std-fit replacement element (you really won't get
that much more flow than the std element regardless of type though), but
make sure it is a dry element, not an oiled type, the oil particles can play
havoc with the mass airflow sensing element (hotwire) within the mass
airflow meter. A film forms on the hotwire, effecting its output for a given
airflow resulting in incorrect mixture and normally flatspots in the power
delivery. (For info, the element can be cleaned by placing meter in a poly
bag with IsoPropylAlcohol and agitating gently.)
FWIW, my own 110 (4.0V8, ZF4, LPG, no backfires) has a cone-type filter
fitted inside a modified standard 3.9 airbox (fitted to the bulkhead across
the rear of the engine), with the trumpet inlet cut back and a cold air
inlet hose running to just behind the top of the offside headlamp panel,
before this it had a pipercross cone filter sitting just behind the top of
the radiator on the nearside, right onto the airflowmeter. The reason for
the change was to give it a sealed cold-air inlet, cold air being more dense
than hot and therefore more oxygen to burn more fuel in, for slightly more
bhp. Probably not measurable, but it was an idea.
Badger.

On or around Mon, 28 Feb 2005 21:41:55 +0000 (UTC), "Badger"
<[email protected]> enlightened us thusly:

>Hahahahaha, what a load of rumour-codswallop and claptrap! I really wish I'd
>had a fiver for every time I've heard that, the change in airflow velocity
>is only the same percentage as the increased volumetric efficiency (and
>hence more or less the power difference expressed as a %) of the engine with
>the new filter fitted. I'd guess that a simple filter change would never
>give an airflow increase of say, more than 5 or 6%.

well, yeah, but... I once had to retune the 110 after swapping the filter
element for a different make.

which isn't to say that it won't work with such as a K&N on it, only that it
needs setting up right for the filter; might possibly need a differetn size
mixer if the existing one is marginal.
--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Brevis esse laboro, Obscurus fio" (it is when I struggle to be
brief that I become obscure) Horace (65 - 8 BC) Ars Poetica, 25