P

pornstarmax

Active Member
Thought I'd put a couple of piccy's of Modded heads on profile page - check them out....

....Big valves, Bulleted guides, SERIOUS porting, and polishing..

Will be fitted with Double Valve springs, and roller rockers. Its built on 4.3 TVR Challange lump, compression ration was 13:1!!!!! (out of old TVR racer, its was done with decked block hence change of block), but now dropped it down to 10:1. With Steath cam, target to chase is 300 BHP, probably wishful thinking but still fun trying

MX
 
Yowzer:eek: I don't know what any of that means, but it sure sounds cool:p
Even better when its running methinks, there had better be a video of it revving and stuff when its done:D:D
 
kooky_guy said:
I like them. Did you do them yourself?

What's a decked block? I've heard the term but...
Click to expand...

Decked block is where you skim top of block, done for a couple of reasons, firstly remove scratches, or dings but as a consequence it means heads are closer to piston and therefore increases compression ratio.

Couple of problems in doing this are - you go to far and you get pre-detonation, (sometimes called dieseling) and other problem is that the heads are now closer togeather further down Vee - so when putting the inlet manifold on the manifold sits higher up on on heads.

Its the main reason I changed block, It was workable but it would mean custom inlet manifold, custom push rods (even with adjustable rockers), so its a right pain in the Cockend if you need to do anything.

However if you get it right then you can compensate for composite rings and increase com ratio to be nice - bit more power and efficiency.

I have in the past done a lot of porting, but as it get more extreme, best left to some one who knows what they are doing. Easiest bit is the matching ports inlet and exhaust but as you get more extreme a lot is removed towards the back of the ports - and you get VERY close to the water channels
See this link:

Tuning

This is where you get a LOT of gains! Also its a right arse to get all of the ports exactly the So in this case it was best left to someone who knows what they are doing and cheque book engineering I am afraid!
 
vougese39 said:
Hope the pistons are pocketed or it could be tinkle tinkle! Nice job though
Click to expand...

Max 1.jpg

Yep - set of John Eagles Finest....
 
All the shiny things with special names:lol: wish I knew what it all meant.

Seriously though, got any more pics, what's the story so far? are you in the building process ATM?
How long till you estimate you'll finish, why is there not a progress thread on this? or is this it:p:D:D
 
Sorry but they dont look that well machined look at the one in my monster v8 engine build on my site that had a piper 285 cam which is a extreme lift for a road car engine
 
who did the heads?

pornstarmax said:
Thought I'd put a couple of piccy's of Modded heads on profile page - check them out....

....Big valves, Bulleted guides, SERIOUS porting, and polishing..

Will be fitted with Double Valve springs, and roller rockers. Its built on 4.3 TVR Challange lump, compression ration was 13:1!!!!! (out of old TVR racer, its was done with decked block hence change of block), but now dropped it down to 10:1. With Steath cam, target to chase is 300 BHP, probably wishful thinking but still fun trying

MX
Click to expand...
 
vougese39 said:
Sorry but they dont look that well machined look at the one in my monster v8 engine build on my site that had a piper 285 cam which is a extreme lift for a road car engine
Click to expand...

Engine is bit of a bastard made up from an old TVR racing engine, based on 4.3 with really, really high comp ratio and skimmed 28cc heads to create high squish motor. I will post a few images of crank, rods and under side of pistons - balancing on them is unbeliveable, all rotatives on engine are hand engraved with weights - crank cross drilled etc, was a really nice job. Surface of pistons is actually really, really good, looks a bit cack in photos from combination of carbon and camera flash in turning marks.

It was the crazy comp ratio that stopped me using original block....

...Something I know very little about is high squish and quench pistons, and machinng of, but would love to know more..... If you have experiance with them would really appreachiate an insight!!!!!!!!!!!!!

http://www.chevyhiperformance.com/techarticles/94138_piston_head_clearance_guide/index.html

Ta
MX
 
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I'm dreaming of rebuilding (probably just have to have it done as it's my daily drive) my engine sometime so quite interested in this kind of thread.
 
kooky_guy said:
I'm dreaming of rebuilding (probably just have to have it done as it's my daily drive) my engine sometime so quite interested in this kind of thread.
Click to expand...

Do it - its great fun, I started with a couple of old knackers from ebay, just to see what the guts look like, after gettting a few running I started tuning a little, and learning a lot.


You can read all you like but to get one in pieces is the best way of doing it. To put togeather a stock motor is actually quite easy, given the right tools, time and money. Only thing I know in hindsight it just how expensive a tuned Rover v8 is compared to a yank motor, and some of the parts are getting really difficult to find now (good quality rockers, P6/SD1 front pannels, oil pump bottoms etc)

You would have to do it for love and not for performance or cost. Give you some idea, a well built Rv8 will cost you around £9K and you might get 300BHP.

£5.7k will buy you a 515Bhp LS3....!!!!!!!!!!!!!

LS376/515 :: PartsWorld Performance :: GM Parts World

When the RV8 is complete, I'm thinking of building one of these.....

...Probably won't stick it in me series 3 though!!!!!!!!!
 
pornstarmax said:
Do it - its great fun, I started with a couple of old knackers from ebay, just to see what the guts look like, after gettting a few running I started tuning a little, and learning a lot.


You can read all you like but to get one in pieces is the best way of doing it. To put togeather a stock motor is actually quite easy, given the right tools, time and money. Only thing I know in hindsight it just how expensive a tuned Rover v8 is compared to a yank motor, and some of the parts are getting really difficult to find now (good quality rockers, P6/SD1 front pannels, oil pump bottoms etc)

You would have to do it for love and not for performance or cost. Give you some idea, a well built Rv8 will cost you around £9K and you might get 300BHP.

£5.7k will buy you a 515Bhp LS3....!!!!!!!!!!!!!

LS376/515 :: PartsWorld Performance :: GM Parts World

When the RV8 is complete, I'm thinking of building one of these.....

...Probably won't stick it in me series 3 though!!!!!!!!!
Click to expand...

£9K???:eek: I wasn't thinking of spending quite that much!

A mate is doing the same thing with a 3.9, but I'd need to try and find another decent 4.6 block to start with and they seem to be as rare as hens teeth. The one in the Rangie seems to be good, but I'm using it!
 
set of merlin F85 heads and a cam will set you back around 2K including fitting will give you 240hp with the 3.9.

kooky_guy said:
£9K???:eek: I wasn't thinking of spending quite that much!

A mate is doing the same thing with a 3.9, but I'd need to try and find another decent 4.6 block to start with and they seem to be as rare as hens teeth. The one in the Rangie seems to be good, but I'm using it!
Click to expand...
 
kooky_guy said:
£9K???:eek: I wasn't thinking of spending quite that much!

A mate is doing the same thing with a 3.9, but I'd need to try and find another decent 4.6 block to start with and they seem to be as rare as hens teeth. The one in the Rangie seems to be good, but I'm using it!
Click to expand...

Sorry thats a tuned, turn key engine, you can rebuild for far, far les than that!!! maybe £2k if most of it is good!

4.6 block are pretty easy to come by try V8 developments, turner engineering, RPI, John Eagles - if your going as far as new block, highly reccommend getting a top hat one.....

Are you sure you need new block?
 
pornstarmax said:
Sorry thats a tuned, turn key engine, you can rebuild for far, far les than that!!! maybe £2k if most of it is good!

4.6 block are pretty easy to come by try V8 developments, turner engineering, RPI, John Eagles - if your going as far as new block, highly reccommend getting a top hat one.....

Are you sure you need new block?
Click to expand...

Well I would need a new block if I was to build another engine while continuing to use my existing one...
 
Just to give you an idea of my prices and specs all engines are top hat linnered replaced cam bearings and core plugs also all crank,rods,pistons,pulley and flywheel are lightened and balanced and fitted with a piper 270 cam.
Cruiser spec engine fully standard rebuild and the above installed with new rad stat and water pump and a full ecu read and adoption reset £4500 all in

Meteor engine with the above and mid valves mild porting and three angle valve seats and billet valve guides £5250

Exocet all the above and fully ported heads blended ports and gas flowed inlet manifold pocket pistons and piper 285 cam £6500

Exocet ballistic all the above with big valves and 5.2 conversion special spec piper cam£9500

This can be done to any v8 but the 3.5 has a very small bore which is one of the problems in that very little can be done to the head due to the valves almost touching the bores, porting and three angle seats can be done but due to the restrictive valves it does not give major increases
Please bear in mind that in the case of fitting one of these engines to a classic you will need a uprated chipped ecu which I can supply or even a bespoke mapped ecu purely for you engine

In the case of the p38a gems will adjust or need changing tune if it is the 4.0-4.6 upgrade the Thor spec will adpt with no problems and cannot be chipped

You must bear in mind the brakes and suspension will need to be checked and upgraded with the Exocet and Exocet ballistic spec upgrades

I have developed a suspension upgrade for the air sprung classic and p38a vehicles coil suspension is in the development and also a six pot front calliper conversion for the abs spec classic and p38a and disco all years too
All engines work well with gas if you require it too
 
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