My motor has "mod-s" cams in it and it does not lack bottom end, at least as strong as the warmed over 3.2 I had. But it does not have the bottom end of 3.4 like Jeremy's has.

Cheers

No probs G74 - interested to see how you get on!

BTW, that's the same P&C kit I fitted on mine. The piston shape is meant to be single plug friendly, even running a 10.45:1 CR as I am. You should be fine, especially with 98Ron fuel and the lower ambient temps here in Europe. I have access to 99Ron here in the UK and use nothing else.

I am considering fitting an MSD 6A to maximise the spark output, will be speaking to the engine builder to gauge his opinion.

SP

I am having difficulties deciding whether to buy the Mahle P/C set from FVD or the Nickies with JE pistons from LN Engineering...
Mahle is a bit cheaper, but I hear good things from LN too.

I'm pleasantly surprised to read that you have a 10.45 to 1 CR!! the HP difference with the lower CR (9.8) is little, but then again...
So you've never had any problems?? Did your mechanic warn you about possible risks of running a high CR, or did you never see it as a potential problem?

Is the dome of the Mahle pistons really so much "single plug friendlier" than the JE pistons?????

So far so good - haven't heard any detonation, even on the hottest of days. My mechanic said I could run an even higher CR with these pistons as they have such a flat crown ....

Depends which Mahle kit you go for - their 10.5:1 offering has a piston very similar to the JE Piston in shape and does require twin plug

See here for a few pics - http://forums.pelicanparts.com/911-engine-rebuilding-forum/175104-95mm-98mm-cylinder-differences-3.html

Going twin plug with the Andial splitter ANDIAL - Performance Parts for Porsche and 964/993 twin plug distributor along with the machining, wires, another coil would run around $1300-1500. If you are comfortable running nearly 10:5 to 1 single plug, you could go higher with a twin plug monster 3.5 with the Nikies or Mahle. If you noticed on Carrera3.5's engine the torque figures are higher than Jeremy's even though the HP is very similar. Carrera3.5 is a very mild build compared to what is possible.

Just a wild thought on more HP/torque with some safety margin. Twin plug 3.5 at 11:1 with a high lift cam :eek::eek: Over 300+ horses. Ok back to reality:D

Email Charles Navarro at LN Engineering and get some feed back what he feels is a safe compression and cam profile to get what you are looking for. Charles posts here on PP as well.

Be looking forward to see how the rebuild goes...

I love Jeremy's cams.......

Just a couple of thoughts/factoids -

- the 276hp "std" 3.2 motor will be running race gas and a lot of timing to get that kind of hp (IMHO and IIRC, SW has confirmed same to me in the past)
- in the UK, we are regularly seeing euro 3.2s make 250hp or even a little more on a trusted dyno dynamics rolling road with little more than chip tuning and a free flow muffler + euro pre-muffler
- my motor is a bit like a euro 3.2 version of Jeremy's and was built around the same time. With the same supercup cams and SSIs it made 260hp
- the Supercup cams will not pass UK emissions due to the overlap and lumpy idle but they do hold the tq very well in the upper rev ranges making good hp up at 6500+rpm unlike the std cams
- I am only running a fairly reasonable 6800rpm limit using new 993 rod bolts which limits the hp potential (3.6s have the same issue) with these cams
- I am running a race valve train with race springs etc that probably costs a hp or 2
- running a light alley pressure plate and a spring centred clutch changes the character of these motors enormously - blipping the throttle at idle is like a switch now

My car has nothing like the grunt of a 3.6 engined 3.2 from the driver's seat, but in a straight motorway drag it loses very little to 3.6 cars. In fact it is dead even with a late 964 (ie., heavier car with the better plastic intake motor). I think there are 2 other things you have to address when tuning a 3.2 or 3.4. First, SSIs are IMHO too small and I sold mine after less than a year to get flipped flange 993 heat exchangers and I am about to switch to 1 5/8" headers. The std 3.2 heat exchangers with euro pre-muffler and a decent rear muffler do not seem to be restrictive up to high 250hp area and the lack of equal length pipes isn't really an issue with motronic compatible cams. Second, at some point, the intake becomes a restriction. I think this is around 260hp area but could be wrong. I will be moving to a late plastic 964 intake next year and possibly MAF. Will I make 270hp or more? Don't know, but short of ITB's, I will have done, within reason, most everything I can based on std euro Ps&Cs.

Sorry but it is not entirely clear to me, you're still running standard P/C so still a 3.2, correct? Or am I mistaken?


Thanks for the food (for thought)!!

Yes, I have std euro Ps&Cs. Since the 260hp dyno I have a theoretically better exhaust and have a further iteration of custom SW chip with slightly pushed timing. I know speculating without comparable dyno runs is a bit of a guessing game but I would think I am making low to mid 260s currently. I know of another carefully rebuild euro 3.2 on std cams with SSIs with Motec mgmt making 265hp out of 9M's shop. This was a road car motor on pump petrol.