Jim @ EuroWerks

Any pics would be great . I just picked up my second 24S and it's almost time to turbo it . Whos run the stock turbo set up on a N/a compression engine . Can it be safe with low boost or is that a slow pig . I could go either way at this point . I've allredy got most of the stuff . I'm tired of Gordan at autometrics calling this a chick car .The first car was totaled by stupidity . I wasw 10 feet from her when she pulled out infront of me . I'm thinking stock turbo @ 15 psi . How long does a stock n/a trans stand 300 hp before it dives up ? Any answers to these questions ? What was the biggest odsticle for this upgrade anyone incontured ? Do we ditch the a/c ? it would make a good place to install the new control units ?.
Oh , and where did spell ck go ? I'm just a f'n mechanic .
Who can help a brother out ?

931GT

I think most folks buy a 931 if they want a turbo 924. Its easier and much cheaper in the long run. Haven't yet heard of or seen a turbo 924S. I suppose if you were able to get a 951 donor car, maybe something that was totaled in a side collision you could swap everything over to the 924S. Engine, Trans, Torque Tube, brakes... what ever else you need. That would be pretty cool but then it would be nice to go with a CGTS body kit and headlight mod. By the time you're done you'll be far and above the cost of a decent 951 or 931. It doesn't really make financial sense.

The best route would probably be a supercharger kit but even that will set you back 5K for the non-intercooled version. Again a 931 or 951 is a cheaper prospect.

white924s

I haven't turbo'd a 924S (yet...) but a couple thoughts
- With the higher compression, you probably won't be able to run as much boost as a 951, but you'll have better low-end torque
- From what I've heard, the factory transmission has a weak R&P gear, so you probably won't be able to get much more than 200hp through that, but then again, some people claim that they can get more without a problem.
- Some parts of the conversion will be straightforward if you want. 951 exhaust manifold, downpipe, and catback should all fit without a problem. Swapping the intake manifold won't be hard. So putting a K26 turbo in shouldn't be hard and they make good power (even if they are outdated)
- Some parts won't be. Fitting a 951 intercooler in the 924S will require some surgery to the nose panel. I'm not sure what all is involved in running oil and coolant to and from the turbo, but that's not to be overlooked either. Lastly, tuning will require something custom (951MAX max tune or standalone ECU). Plan on spending some money on dyno time

So in all, it'll be a non-trivial amonut of work, but it can be done.

Jim @ EuroWerks

Ya know , it's really disheartining this board used to be full of people . I remember plenty of pics from these conversions . Were they photoshope . If I do this , Will my car be the 1st one ?

931GT

Everyone is at 924.org

Jim @ EuroWerks

Thank you , I'll have to ck that out !

RSflared72e2

The cheaper and better-performing way to go is to lift in a 951 drivetrain. The NA drivetrain always yields disappointing and unreliable results when forced induction is cobbled onto it - to do it right would take way more bucks than just buying a 951 parts car and doing the swap. Porsche already did the R&D, no need to reinvent the wheel.

The only hurdles are the intercooler (RX-7 unit works if located like a 924 GTS unit, and looks super cool - will need a 931 style hood scoop, I happened to have a 931 hood at the time), bolt the 924S tranny hangers onto the sides of the 951 tranny to mount it, a few other things.

BTDT about 5 yrs ago, and it was a real screamer with the lighter weight and smaller frontal area vs a 951. One of the cars I really regret letting go.

I MAY have posted on it back then under my old name - 91S2. Am waiting on JD to merge the accounts, been off the forums here for a long time...

924RACR

Only solutions, either pass 'em on track or find another source...

As for the conversion... I would at least try to keep the reengineering to a minimum; first choice swap in the 951 drivetrain, second choice bolt on all the 951 externals to the 924S/944 NA motor and dial back the boost. But yeah, don't reinvent the wheel.

Will likely require a little surgery up in the nose to fit the 951 IC (which, BTW, is just a derivative of the 924GTS IC - it's the 924CGT that had the IC over the cam cover requiring the hood scoop... not sure what you were talking about with that one?)... a good time to install the GTS fixed headlights...

944CS

i can tell you an ASG trans will handle 300 ft-lbs with the right gear oil

951_for_John

this could be a great car, quite the sleeper, and it could have more top speed than a 951 due the the narrow body.

if this was my project I would use the 951 drive train and maybe a 931 trans.

951 doner car is the way to go...

924RACR

I wouldn't use the 931 trans. Neither kind. The snailshell is too hard to find parts for, and too rare, and the rest are no upgrade over your stock box - in fact, they're virtually identical.

Sorry, gotta fight this misinformation wherever it springs up.

Back to the last statement, yes, the 951 donor is the way to go, and include the trans if you change it out at all.

Raceboy

Torque tubes are the same between 951, 924S and 944, so find a 944 S2 (better) or 951 gearbox (worse).

924S, especially US variants, handles boost very well (lower CR than Euro) but the right (and the only) way to do this is by using standalone engine management (be it Megasquirt or whatever). Otherwise you can't get the setup working correctly and in worst case you'll blow up the engine.

944Sknight

Perhaps you should check with this guy "lemming" in rennlist. He tranplanted a 968 engine in his 924S.
Go to cardomain.com and search for 924S3 under porsche. That will led you to his rennlist thread and
see his pics and video on how fast and rips cars on the racetrack.

J1NX3D

there is a 924S with a turbocharged 968 engine in the UK. It was built by a shop there and was pretty awesome! i found pics and a description of the build of it searching on google about 2-3 yrs ago.

Darwantae951

Beat 951s are cheap (probably less than 3k for a wrecked one). Buy it and swap everything over. If you can keep it looking like a 924, that'd be friggin' sweet!