pjburges

So Ive got this 924S that I have converted into what basically looks like a 944 Turbo with the NACA hood scoop. Currently Im using an 8V N/A with Euro pistons and the power is OK with a stripped down interior. Ive got a nice suspension setup 350lb coilovers in front and 30mm tbars in rear, with Koni yellows all around.

My question is concerning what engine I should run in the car. A local guy has a 931 engine in great shape for $650, but as I understand the most I could get out of that thing would be around 200-240 hp, albiet it is a forgotten motor and kind of fits the "look" of the car. Is that motor worth my effort? Another friend of mine has an S with an S2 engine(ate the valves) he wants to sell as a parts car for 2K.

Should I jump on either of these as a good donor, or should I wait for a more elusive Turbo or 968 motor? Im trying to keep my expenditures under $1500 for the whole engine whichever 4 banger it is. The tranny would be another story.

Let me know your opinions on whats best on a budget, but will deliver some decent power. All my friends drive 300hp BMW's.

gt37vgt

well just flick through this forum you'll find 944 motor set ups .
the S2 is a nice starting point but can be a bit more to build and repair as there is more to spend up on with heaps more parts in the head .
the most cost effective thing up to 400hp is a single cam 944 turbo motor and they are realy good as there are heaps of good bits for them and lots of good things that just bolt together .

beyond 400hp the twin cam motors like s2 and 968 are better you wont spend so much time getting the flow out of the head but you will spend time and money making manifolds .

I think look into the cost of fixing up the S2 head offer 500 for the S2 motor pay up to 700 hopfully have it in your car making 230 hp for the 1500 $ when you fix the head drop the compression a bit to 10:1 or less then down the track stick a low boost (13 psi ) turbo on it fuel it up tune it and end up with a good 400hp set up .

search for posts from a guy "BLOWN944" he is a tinarse legend and he will consult you on the most cost effective set up. he ccurrently has a 400hp 944 turbo that cost 3000 in total .

sorry the rest of us are just out of control spending 10 grand on our motors

333pg333

Where can you spend only $10k Adam?? Show me the path to enlightenment. hahah
I think for $1500 you would be better off going down the n/a S2 path for now otherwise keep what you got and just put the pennies in a jar until you got enough chickens to hatch a decent turbo 8v. heheh 'Tinarse'

gt37vgt

I was feeling so confident it would telly up to 7 k so it did the numbers and got 9.5k but that was exhuast inter cooler efi inlet manifold .
Think I may dismount from my high tin Clydesdale now .
but per numbers your motor still has to make double the power of mine or last twice as long considering the spending Pat

333pg333

Hard to say. Double is double. Easy to write, not easy to achieve. Lasting longer, well it depends on how long it's in the car.

gt37vgt

every extra hp cost double what the last one did this double rings true

333pg333

Ahh, double cost is something I can relate to. I emailed you too.

Now back to the topic. Seems like prices in the US are way lower than ours so who knows what can be had for $1500.

pjburges

That makes sense. Honestly Im just starting to get bored with the 140hp motor. Its got a great torque band and its still fun to drive, just wish there was a little more umph. Ive ridden in a 968 and it seemed to have a decent amount of pickup, which should be even better in my lighter bodied car. They are around 240hp right?

So I should stay away from the 931 motor despite its low price?

gt37vgt

nah some stuff here is cheaper my S2 motor was 1500 AU. turbos and EFI are the same price plenty of stuff cheaper here in oz

pjburges

Ok so it looks like I can get this 931 audi tractor motor from a friend for 300 bucks with ancilliaries. Im looking to develop around 250 ft/lbs of torque - that should make the car plenty nippy. Can anyone point me in the right direction as to who has modified these older turbo motors and has advice? Ive been dying to do a megasquirt project so maybe this is my chance...

Does anyone think I could get there with a different turbo/wastegate/megasquirt/ITB intake + an intercooler? I have a spare little intercooler with 2.25" pipes from a Saab lying around and TB's off of an old 1000cc sport bike...

Do these motors have any weak points? You know like -crank, rods, pistons, headgasket...?

xsboost90

you do realize the 931 motor wont just drop in right? The fuel pump is different, mounts are different, etc etc...The steering rack and frame support is even different.

pjburges

So the motor mounts are different? Id rather keep my 944 lower crossmember because I went to lots of trouble to find a manual rack off a 944.
Fuel and ignition would probably be megasquirt so that should work out ok. Are the clutch and bellhousing different too? To answer your question, no, I dont know any of this stuff. Im an idiot! lol which is why Im asking people on the forum.

FRporscheman

Correct, the 931 mounts are completely different. The whole crossmember and the way it attaches to the car is different. If you're going through all that trouble, you may as well be putting in a SBC.

The S2 engine sounds like a good deal and it's a fairly good idea, compared to the headache, expense, and addictive money pit a 951 engine will be.

If it needs a new 16v head I can tell you where you can find one.