Hi Folks
Im on the hunt for some info on tunning a 944S2 engine.???

Stuff like gas flowing of the head + inlet manifold.?? Is it worth doing.?? + Skimming the head to raise compression to give more power.???
Would lightening + balancing the crank + rods be of any use.??
Are different cams available.???

What has been done to enhance the output of a S2.????

Anything other than just chipping + free flowing of the exhaust... As ive already done that.??

I use the car on UK track days,, + want more "go" out of the motor...

PS i DONT want to turbo the car....

Im after a "ultimate" NA S2....

 

you may want to look into swapping in a 968 engine, it is more refined and has more power.

 

if you are really interested in building the S2 motor you should look into

boring the block out to ~3.2 and getting custom pistons to raise the compression ratio to ~11.5:1
getting some custom cams ground
exhaust header
port/polish/valve job on the head
either extrude hone the intake manifold, or better yet get a short runner manifold
knife edge/cross drill/balance the crank
megaquirt engine management with MAP sensor and WBO2 for fuel/igintion tuning

keep in mind this is going to cost you out the a$$, but there's really no much else you can do to the n/a motors to raise their power significantly without completely building the engine

Also, remember that no one has really done this before, so while it would most likely end with a badass n/a motor, you'd be going out into uncharted waters and doing alot of R&D yourself

 

Well, Cam's and S valve springs are a good place to start and will net you the biggest HP gain. Then I would work on the headers (4-1) since the stock headers are pretty bad. Then I would polish the intake system and head (Do not port it). Also tuning will help alot with problems.

 

Did you call Jon Milledge Engineering ?

 

You might want to check out this thread (334hp 2.5L N/A?). It's quite long, and has a lot of comments/arguing that you can read through. Perhaps even some good ideas.

 

MMMM . interesting reading ,, thanks...

 

Do what the Factory did with the Firestone Firehawk 944S2's. Do a google search.
-Z-man.

 

what did the factory do with the Firestone cars? I tried a google search but didn't turn up anything actually having to do with the firestone cars....got a link maybe?

 

Considering that the S2 engine does make decent torque from like 3K RPM to the redline, would it make sense to raise the redline to like 7500 RPM with a little smoothing of intake and exhaust to easier breathing, it would seem to make sense.

Now I'm just wondering how hard it would be to raise the redline to that level. Sure you'd have to blue print and balance the engine components, and probably lighten the flywheel, but what else?

 

Moook it might be worth trying these three companies.

EMC Motorsport, these people build the engines for the PCGB 944 race series, they may be able to help you with yours. I don't currently have any contact details apart from the fact that they are based some were in Birmingham.

Ninemeister, site here: http://www.porschetuning.co.uk/html/index.php

Promax, http://www.promax.uku.co.uk/main.htm

Hope this of some help.

 

Steve
Promax ,, ive got one of there chips in the car + a free flow "janspeed" exhaust ,, both from them.. In fact ive been in touch with Andrew about further " upgrades"...
Ive also JUST fitted a MAF kit that they have only just started doing.. That does make a real "smooth" difference to the drivablity...+ torque spread....

BUT as ever i want MORE....

Thanks so far for the replys... Keep em coming...

 

can you plase share with us the info on the MAF kit?

Brandon

 

968 into a s2 wiring is real difficult, but can be done.I got a stock 968 in an S .On the track no stock S2 can touch it (yet)!!!

 

MAF kit info...

http://www.porscheclubgbforum.com/tm.asp?m=135959
It rambles on a bit + goes off topic as usual...

+

http://www.porscheclubgbforum.com/tm.asp?m=154477

Hope you chaps can access this site ok.....

Dave W.