V2Rocket

ritzblitz - The 944 turbo motor will swap into a non-turbo car; the major difference (crossover pipe) doesn't interfere with any bodywork as it is under the engine. All the 2.5 blocks, turbo or not, will bolt up to the TT.

With engine conversions like V8s it is common practice to leave the transmission in the back. Generally a 951 tranny is used because it has the hardened 1st and 2nd gears that are able to handle the huge power of the small-block. However, the user here 944-LT1 swapped a Chevy LT1 motor (older Corvette engine) into his NA and kept the stock transmission with no problems.

There have been examples (seen on ebay mostly) of front-transmission 944s with a standard differential at the back but they have all been dragsters. You could probably do the swap but you would lose the balance front-to-rear that the 944 comes with. The engine hanging in front of the front axles would kill steering response and you might find yourself in alot of trouble if you spin (all the weight on 1 end = pendulum).

kennycoulter

copied from another poster from 04 or 05:
"The Porsche shop I took it to builds race cars, so I asked him to simply 'give me a little'.. He put a new head on it, cut the valves a bit, ported the intakes, polished the exhausts, and matched all the ports/manifolds. He did some 'secret' crap to the cam/lifters, I suspect just cleaning them and polishing the bores, and he decked the head I believe .020 To go with that, I've got a ceramic-coated (stock)headerfrom http://www.hpcoatings.com/
test-pipe, 3" cat-back exhaust, and a Supertrapp Wave muffler. The intake is a shielded cone-filter ducted to the inner fender, a 'big-bore' throttle body, and the AFM has been polished/reworked. The fuel system is a stock fuel pump, with a billet fuel filter, with a custom-modified fuel rail, balanced/flowed fuel injectors from http://www.ccfuelinjection.com/
and an adjustable fuel pressure regulator. All the fuel system parts are available from any "rice-car" speed shop. I just found what fit. As far as the EFI Fueller... It's a part that I played with from the M/C industry. Its from http://www.dobeckperformance.com/
When we dyno'd the car, we got it to run 191HP on a *hard* 4th gear pass, after a little tweaking. I forget what torque we got, I want to say it was close to 160ft/lbs... I'll see if I can find the sheets on the run and build.."

tifosiman

<broken record>

It's not the "hardened 1st and 2nd gears" that maked the 951 trans a better option (hmm, you should research whether or not a standard 951 trans has them), it's the stronger ring and pinion.

944-LT1's case is an anomoly. I would not recommend that anyone keep the 944 trans with any increase in HP over and above stock. You are better off just selling the 944 trans for $300-$400 while it is still good and putting that money toward a 951 trans or S2 trans.

</broken record>

GodSpeed

+1,000,000

That much power on a stock na trans is the exception not the standard.

And the R&P is usually what goes on these trannies, not 1st and 2nd.

Tom R.

I bet this is found in about two minutes using the search function.

I bet the answer to the OP's original question is found in about two minutes using the search function.

I bet the next question will be whether to use a spring or rubber centered clutch.

I bet I could use some ice cream right about now. Yummm ice cream while i watch the clowns.

tifosiman

ACK!

TedA

First off feel free to count me among the crazy

Due to circumstances beyond my control I found myself in the position of having to put a headgasket on a 2.5L NA which was in a recently purchased NASA GTS-2 race car. Pulling the head revealed euro pistons which had been installed 180 out of phase (those pistons do have a front). Minor but noticable piston/valve contact. Pull the pistons.....bores out of tolerance. All this on a recently rebuilt motor with +/- 0 hrs.

Anywho...without going into the gory details I have made every attempt to make sure the build is correct this time. Car on the dyno last night and made respectable power but lean on the upper RPM. Some tuning required to correct this, hopefully tonight. It's a race motor not a street motor, I don't have the $$$ invested that I have seen posted and I am in the neighborhood of the RWHP figures.

Anyone interested could PM me.

M758

Ted,
I hate to be harsh, but I will believe it when I see it. My experience does not make me think you can get +50hp just from Euro pistons. And I would love to see the dyno chart.

Techno Duck

I think you might be able to make about 175-180hp realistically with the right work. Figure a cam (JME stated 14-20bhp over stock), full 2.5 inch exhaust and a custom chip tuned to take advantage of everything might get you a solid 20bhp. Paired with euro spec pistons (so you have 160ish bhp stock) you might be in the 180hp range. The problem with this, the powerband is gonna be pretty narrow and pretty high up, probably 4000rpm+. Problem with this is you just dropped about $1500.

Disclaimer, i am not speaking from experience. Just speculating.

M758

180 hp at the crank or the wheels? The original post was talking about 200 hp to the wheels.

TedA

Believe me, much work has been done to diagnose this car's past motor woes and correct them. The old euro pistons did not go back in. I will post pictures of the tops when I get them back. Anybody know what euro pistons are worth with four valve reliefs in the top in lieu of the customary two??? New JE customs...102mm and some other stuff. Honestly the number was larger than I anticipated, goal was not to build a killer motor, just wanted to get the thing right. I'll be happy to share the details and chart.

Techno Duck

180hp at the crank. I think 200whp is dreaming, not without nitrous atleast.

M758

Please do.

ritzblitz

That's exactly why I asked. Thanks for all the info guys.

So what kind of power can one make with the 3.0l?

TedA

PM sent................