Noahs944

I'M DOING IT.

Noahs944

I need 16 valve parts though... the cheaper the better. I'm a "baller on a budget"... you know, a poor brother!

Heck, growing up we were SO poor, my daddy used to cut holes in our pant pockets so we'd have something to play with!

Noahs944

This project is about raising the 2.5 litre to great heights!

Porsche did that with the Turbo & with the 944S.

I will have to beg, borrow & steel. I am selling some parts to fund this project.

I have some parts but need others. Need 2 exhaust valves, new chain and tensioner pads, gaskets, valve cover and oil pan & engine block seals. Need piston rings, need engine bearings....

How far doing I wanna take this?
Rebuild the ENTIRE engine, BUMP up the performance with long tube headers and Jon Milledge Camshafts?

Noahs944

I only ever drove one S. My impression: SMOOTH.

SloMo228

I quite like my S compared to the 8V I used to have.

We're taking similar paths with our cars, though I'm not as far or as deep into it as you've gotten. I've stripped about 160lb from my S so far and swapped on an S2 intake and it's pretty peppy.

Mine is kind of tired at 200K+ miles so I have been considering a performance rebuild with cams, lightweight internals, and a header, but then I think about the gains I could get for about the same cost (or less) by just swapping in an S2 or 968 motor.

I haven't made up my mind on that end yet, though. The extra power and torque of the 3 liter would be nice, but I like the kind of high-strung personality of the S engine.

odonnell

I think the S already has pretty aggressive cams, I was reading somewhere they're actually even more aggressive than the S2. With a nothing else but solid MAF or speed density tune I bet you could get over 200bhp without too much of a hassle, everything after that is a bonus.

V2Rocket

S/S2 intake cams are basically identical, the S exhaust cam is more aggressive than S2.

ditching the AFM would put you over 200hp for sure.

ramius665

A good friend dyno'd his S2 and put down 198hp at the wheels. Modifications were a Firestone Firehawk DME chip, 968 intake and cat delete. He replaced his AFM with a Scivision MAF and there was a noticeable bump in power across the rev range.

I have an S, also has a SciVision MAF in place of the AFM and a 968 intake. Still has stock cat in place. I haven't dyno'd it yet but I'm confident I'll make at least 188hp at the wheels.

It doesn't take much to get some nice power gains on the 16V motors, but it looks like ~240hp is about the realistic limit without a large investment.

SloMo228

How do you like the 968 intake? I swapped an S2 intake on and felt like it gave a slight increase on the top end and better throttle response, but honestly it's a comparison between the S2 intake with a fresh vacuum system and the S intake with 27 year old vacuum system, so it's not exactly apples to apples.

One of these days I'd like to swap the S intake back on and so some actual testing to see. I do like the simplicity of the S2 intake, though - the S intake is much more complicated and takes up a lot of room in the engine bay.

V2Rocket

A MAF and a good tune will go a long way on the 16v, methinks.

Their tune is very conservative for emissions reasons, you can't even adjust the idle speed.
And the barn-door AFM is crap for power as we know. The door doesn't open fully until WOT at ~4500rpm or so.

The "S" needs more chutzpa below 4000RPM and I think the MAF is just the ticket for that to happen.

Check out this dyno of mine comparing current MAF+etc setup vs the stock AFM...look how much the torque curve has been lifted at lower RPM...now imagine it with 10.9CR (vs my 9.5) and 8 more valves to breathe through.

Humboldtgrin

Lots of work. You need to change out the dash wire harness I think and the instrument cluster from the 944S also. The 944S transaxle is also a mix of 951 gears with 944 ring and pinion (differential) so it should be swapped out also.. I have a 944S parts car I am going to do the same thing to my 86 944. I am going to have both my 944 and 951 be 16v engines. I'm using a 928S3 head for the turbo thou.

V2Rocket

if going through the trouble of wiring a 16v to an 8v car...i'd just 'squirt the thing.

odonnell

Yeah honestly making a new harness (for whatever ECU you run) sounds a lot harder than it is. If you're going to alternate hardware (coil packs, air metering, integrating wideband O2, stuff like that) it's almost more work to try and make the old harness work. For my build, the new/custom harness also allowed me to construct a basic relay/fuse panel and split the functionality of the DME relay into two separate relays. which aren't mounted in a retarded area (early car issue).

Arominus

My 944S after Rogue Tuning spent some time driving it as a daily with the Beta NA-tune maf conversion.

V2Rocket

that looks like an even 200 crank to me. (188/152.1)*(161.5)
nice !!