964 engine mods...advice
Discussion
LWT RSR said:
Will just a cam change make any difference or would you have to go to 3.8 barrels and pistons?
Also can you run this on open pipes with race headers?
And lastly can you fit slidevalve and truppets to a 964 engine?
I want to build something like this,it looks quite powerful
3.8 nice but not a necessity. You can run anything with open pipes as long as the manifolds are designed for it (and you can live with the noise) Which judging by the noise that orange thing of yours made, you can ! Also can you run this on open pipes with race headers?
And lastly can you fit slidevalve and truppets to a 964 engine?
I want to build something like this,it looks quite powerful
For a good quality, stick to his quote, no bullsh*t power figures 964 engine build speak to Nick Fulljames at Redtek. Tel: 01869 811880
If Nick's busy you could try Richard Chamberlain.
Top bloke and not a muppet unlike some others I could mention
Slippydiff said:
LWT RSR said:
Will just a cam change make any difference or would you have to go to 3.8 barrels and pistons?
Also can you run this on open pipes with race headers?
And lastly can you fit slidevalve and truppets to a 964 engine?
I want to build something like this,it looks quite powerful
3.8 nice but not a necessity. You can run anything with open pipes as long as the manifolds are designed for it (and you can live with the noise) Which judging by the noise that orange thing of yours made, you can ! Also can you run this on open pipes with race headers?
And lastly can you fit slidevalve and truppets to a 964 engine?
I want to build something like this,it looks quite powerful
For a good quality, stick to his quote, no bullsh*t power figures 964 engine build speak to Nick Fulljames at Redtek. Tel: 01869 811880
If Nick's busy you could try Richard Chamberlain.
Top bloke and not a muppet unlike some others I could mention
fantastic.Can I ever replicate that noise with a 964 engine or is that just
not possible because it doesn't have carbs?A Porsche engine must be heard
properly or you might as well go and buy a Nissan
Slippydiff said:
I drove the Midnight blue 964 C2 track slag that Darren at Castello (and this post isn't aimed at Castello/Darren, he was only advertising the car as described to him) had on SOR a few months back. It had 3.8, cams, Motec etc and was rated at circa 350hp 
Both my CSL or my Mk1 GT3 (360hp and in good rude health) would've left it for dead. 350hp my ar*e, closer to 300 (or less) if my experiences of de-catted and re-mapped 964s are anything to go by.
Just because that one didn't seem to produce the claimed power does not mean others don't. The 354bhp was on Chipwizards Dyno and the car was set up properly by Wayne.Both my CSL or my Mk1 GT3 (360hp and in good rude health) would've left it for dead. 350hp my ar*e, closer to 300 (or less) if my experiences of de-catted and re-mapped 964s are anything to go by.
Unit 11 built a bespoke retro-mod (my terminology) 1973 RSR-alike for a customer (well into 6 figures build cost) with a 964-based engine that to my untrained looked a bit like the one in the photo - throttle bodies etc (although the fibreglass trim/tin work was left raw, as per the original car apparently) and that came out at 360bhp (although all told it had cost £35k-£40k), so it is certainly possible although admittedly most are not actually producing that kind of output.
thegoose said:
Just because that one didn't seem to produce the claimed power does not mean others don't. The 354bhp was on Chipwizards Dyno and the car was set up properly by Wayne.
Unit 11 built a bespoke retro-mod (my terminology) 1973 RSR-alike for a customer (well into 6 figures build cost) with a 964-based engine that to my untrained looked a bit like the one in the photo - throttle bodies etc (although the fibreglass trim/tin work was left raw, as per the original car apparently) and that came out at 360bhp (although all told it had cost £35k-£40k), so it is certainly possible although admittedly most are not actually producing that kind of output.
Marcus, I've no issue with Wayne whatsoever, from all the feedback I've heard he's very good at getting horsepower from Stuttgarts finest. My (missing) HP concerns lie elsewhere . . . Unit 11 built a bespoke retro-mod (my terminology) 1973 RSR-alike for a customer (well into 6 figures build cost) with a 964-based engine that to my untrained looked a bit like the one in the photo - throttle bodies etc (although the fibreglass trim/tin work was left raw, as per the original car apparently) and that came out at 360bhp (although all told it had cost £35k-£40k), so it is certainly possible although admittedly most are not actually producing that kind of output.
LWT RSR said:
Thanks mate will do just that.Bloody miss my orange car that noise was just
fantastic.Can I ever replicate that noise with a 964 engine or is that just
not possible because it doesn't have carbs?A Porsche engine must be heard
properly or you might as well go and buy a Nissan
A 964 engine on open pipes and carbs (or ITBs) will sound pretty much the same as your RSR rep Tony !fantastic.Can I ever replicate that noise with a 964 engine or is that just
not possible because it doesn't have carbs?A Porsche engine must be heard
properly or you might as well go and buy a Nissan
Edited by Slippydiff on Thursday 21st July 22:55
Slippydiff said:
For a good quality, stick to his quote, no bullsh*t power figures 964 engine build speak to Nick Fulljames at Redtek. Tel: 01869 811880
I'm in full agreement there. He's building me a 3.8 on throttle bodies and EFI from a 3.6 core engine as we speak!Also to whoever asked, if you are doing an engine build of a 964 engine, I can't think of a reason you can't run it on carbs if you want. That's one of the options we looked at for mine.
Bert
BertBert said:
I'm in full agreement there. He's building me a 3.8 on throttle bodies and EFI from a 3.6 core engine as we speak!
Also to whoever asked, if you are doing an engine build of a 964 engine, I can't think of a reason you can't run it on carbs if you want. That's one of the options we looked at for mine.
Bert
Sounds excellent BB, what are you putting it into ?Also to whoever asked, if you are doing an engine build of a 964 engine, I can't think of a reason you can't run it on carbs if you want. That's one of the options we looked at for mine.
Bert
BertBert said:
Also to whoever asked, if you are doing an engine build of a 964 engine, I can't think of a reason you can't run it on carbs if you want. That's one of the options we looked at for mine.
Bert
Besides this, has anyone gone distributor-less yet and put separate coil packs on the plugs?Bert
thegoose said:
BertBert said:
Also to whoever asked, if you are doing an engine build of a 964 engine, I can't think of a reason you can't run it on carbs if you want. That's one of the options we looked at for mine.
Bert
Besides this, has anyone gone distributor-less yet and put separate coil packs on the plugs?Bert
with 46mm webbers and it ran a treat.RSR headers and 24" megaphones mixed in and it was just
fantastic.Now I want to do a similar job to my 964 engine get it up to at least 350hp or more
but with a loud raspy exhaust note.Have purchased a Supercup exhaust system which coprises of
2 sets of 3 into 1 headers which go into a single rear box with 1 outlet.This definitely released
more horsepower but was much quieter than the stock set up that the car was running on before,I
was quite pissed off about this and hence I have dragged up this old thread to get as much help
from the likes of you and Slippy as you are the guru's in this field.Power and noise thats all
I want.Please keep the info coming lads,thanks Tony.
The reasonmy rear bumper is off is because I miss fitted the exhaust and this happened......
Tony, if it's just noise you're after you can run the standard manifolds/heat exchangers running into a decat pipe, which in turn runs into a Cup pipe and then delete the final box and install one of these :
http://www.supertweaks.com/index.php?route=product...
(The standard tailpipe trim fits onto it)
http://www.supertweaks.com/index.php?route=product...
(The standard tailpipe trim fits onto it)
Slippydiff said:
Sounds excellent BB, what are you putting it into ?
It's going into an 89 G50 Carrera hot rod. Stripped, "widebodied" and rebuilt with half cage to be reasonably light (no sunroof, lightweight carpets, seats, doorcards, manual windows etc).Designed for a mix of road and track so starting off with turbo spec suspension and rubber bushes. Aiming for about 350bhp. I'm sure over time the suspension will get tuned to either work well in the middle or it'll evolve softer for the road or harder for the track!
LWT RSR said:
I had individual coil packs,from Clewitt Engineering in the States on my twin plug 3.4 engine with 46mm webbers and it ran a treat.
Are there any specific advantages to individual coil packs?Bert
BertBert said:
It's going into an 89 G50 Carrera hot rod. Stripped, "widebodied" and rebuilt with half cage to be reasonably light (no sunroof, lightweight carpets, seats, doorcards, manual windows etc).
Designed for a mix of road and track so starting off with turbo spec suspension and rubber bushes. Aiming for about 350bhp. I'm sure over time the suspension will get tuned to either work well in the middle or it'll evolve softer for the road or harder for the track !
Bert
Designed for a mix of road and track so starting off with turbo spec suspension and rubber bushes. Aiming for about 350bhp. I'm sure over time the suspension will get tuned to either work well in the middle or it'll evolve softer for the road or harder for the track !
Bert
BertBert said:
It's going into an 89 G50 Carrera hot rod. Stripped, "widebodied" and rebuilt with half cage to be reasonably light (no sunroof, lightweight carpets, seats, doorcards, manual windows etc).
Sounds similar to what I'm doing except I'm using a 964 as a base and won't be modding the engine. What colour are you going to paint it ?
christer said:
Does anyone know where H321ELC is these days btw?
A guy came here in it looking to part exchange it for a 996 GT3 RS (ex-Sambaman) a couple of years ago. Given what I've since learned about the car from this thread perhaps I wall a little harsh on its value - he wanted £19k and I thought that was way too much (although to be fair 964 prices in general have risen since then). He was local (Cheshire) but I doubt he still has the car.BertBert said:
Slippydiff said:
Sounds excellent BB, what are you putting it into ?
It's going into an 89 G50 Carrera hot rod. Stripped, "widebodied" and rebuilt with half cage to be reasonably light (no sunroof, lightweight carpets, seats, doorcards, manual windows etc).Designed for a mix of road and track so starting off with turbo spec suspension and rubber bushes. Aiming for about 350bhp. I'm sure over time the suspension will get tuned to either work well in the middle or it'll evolve softer for the road or harder for the track!
LWT RSR said:
I had individual coil packs,from Clewitt Engineering in the States on my twin plug 3.4 engine with 46mm webbers and it ran a treat.
Are there any specific advantages to individual coil packs?Bert
was so much fun.Love what your doing to yours looks like it could be a beast.Get some big brakes
with it and you will be unstopable!Hope it all goes to plan.
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