[xrad]

I am considering building a hot 944 turbo engine for my 968. In regards to a total engine transplant:



does anyone know if the 944 clutch mates to the 968 driveshaft (keeping the 968 bell housing)??



Or, in otherwords, if the 968 bell housing fits the 944 engine?



I don't want to change the torque tube or transaxle!

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[porsche]

I'm putting the finishing touches on a 968 Turbo S recreation.



A word of warning.... to do it right, Turbo projects are not for the "faint of pocketbook."



That said, it's been a wonderfully rewarding build with spectacular results.



The "payoff," is a comforable street "sleeper" that "purrs" on crappy CA 91 octane (while sitting in stoplight-to-stoplight traffic with the AC spitting ice-cycles).



Conversely, on an open stretch, the 968 Turbo S literally "folds space" as it delivers you to the horizon at triple digit speeds.



Have a plan and plenty of capital.



Porsche

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[xrad]

awsome! but do you know the answer to the above?

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[94SilverCab]

I'm the wrong guy on technical stuff, but I believe the answer to your question is no....they do not marry.



regards,



Jay

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[Eric_K]

The easiest way is to use the 951 bellhousing, torque tube, flywheel, clutch and starter. To use the 968 bellhousing you'd have to use a custom flywheel which had timing marks setup like the 951 flywheel. The 951/S2 flywheels are not interchangeable with 968 flywheels as they are different depths. Also if you use the 968 bellhousing you will need a custom exhaust as the "off the shelf" 951 exhausts won't clear the deeper bellhousing and starter. I've had this project inching along for years.

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[xrad]

all of a sudden, this becomes more than I want to deal with this summer. I think I will just finish the interior and body and suspension. I really wanted to keep the 968 torque tube and bell housing for ease of clutch changes.... <img src="/forum/images/smilies/968/blink.gif" class="smilie" alt="" />



And it's a real shame because I have the Haltech and a nearly new Garrett T3-T4 hybrid turbo nearly perfect for the 2.5, just have to change a wheel or two.



THANKS Eric!!!!

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[PorscheDude]

If you have a stand alone ECU you can keep the 968 parts. You just need to drop the compression ratio and have the 968 intake married to 951 intake.

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[flash]

make sure that if you do this, that you do not run into the problems you would have here - you cannot install an older engine than one the car had, and still pass emissions - the emissions laws have changed in 37 states, and the last 13 come up soon - i'd hate to see somebody go through all that, just to be stuck unable to register the car legally

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[xrad]

funny, we don't even check or have a method of checking emissions in Michigan. Not even an emissions sticker in the window. Just registration and insurance. I really don't see this state doing anything in the next 10 years (at least!)





SMOKIE: was that you lurking around on 6speedline forums today?? Not a very popular site judging by the post numbers and dates...



I am going to hold off on the turbo system until I get more data about cylinder and piston coatings for the 3.0

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[PorscheDude]

Yea I was looking around. Other than a dead 944 section and some butter cups, there is some cool things there.

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[flash]

xrad - 2009 was the big one, but i think 2010 is the next big date where everybody comes up to the same base standard - it's a long very boring federal standard (over 400 pages of very jumbled hoo ha)



aftermarket equipment is going to be scrutinized on cars under 20 years, as well as emission tests on those cars, and high pollution areas will have more strict standards than lower ones - major metropolitan areas will be hit hardest

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[xrad]

Smokie: yeah, I was checking out the turbo section..



Flash: Our governor is impotent, our city mayor is nailed in a text message sex lying under oath scandal, more than half the city council is under federal investigation for bribes, school funding may have to return 17mill in cash to fed, ford and GM stock is less than 10$ each, jobless rate the highest , more than 50,000 holmes for sale or forclosed, and there is absolutely no infrastructure/facilities for testing...



I just don't see this happening here in 2 years......but you just never know

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[Bruckner]

Too bad, I would have been very interested in finding out more about this project. Fitting a 951 engine should be less of a hassle than making a proper 3L 968 turbo engine. Biggest problems I see are electronics and intercooler, the rest should be fairly straightforward. While a true 3 liter turbo would give you immense torque, the immediate availability of 951 motors, proven performance enhancing modifications, extensive knowledge about these powerplants, along with the magnificent cost savings vis-a-vis the 3L more than make up for it. I'm wondering why so few people have attempted this swap? If the small block V8 conversion isn't Porsche enough, a reliable 350hp turbo 2.5L should do the trick?



Regards,

Bruckner

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[flash]

xrad - governor doesn't get much of a say - it's a federal thing

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[xrad]

Flash: Nice....cause the feds are all already all over this place! Honestly, I would put some good cash down that it won't happen in the given time frame.

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[FRporscheman]

To swap in the 951 engine you will need to swap in the 951 TT, flywheel and bellhousing as well. Unless you use a standalone EMS, then you can keep the DMF, bellhousing and torque tube. But honestly, if you put in a new clutch (with the new engine) that will last another 5 years or more, who cares how easy/hard it is to access the clutch? Swapping a TT is a bit of a chore.



I'm also doing a turbo conversion this summer. The only part of the whole job I'm really not looking forward to is the TT swap. But it will be nice to have a freshly rebuilt (and quiet) TT in there.

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[xrad]

Thanks FR. I need to gather some parts and do some other things before the engine.

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[porsche]

BTW,



Shawn is selling his 968 Turbo S replica. As such, if you wanted a "completed" street ready 968 Turbo that passes stringent California emissions, buy Shawn's and you're done!



If you're doing your own conversion, one of the many items needed is a stock 968 intake manifold. If you don't want to cut yours up (or you don't have one). I have one available.



Porsche

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[flash]

i am all but certain that it does not pass california emissions - he must have a CARB sticker for that, and he has been more than reluctant to provide it or say he got it - i am pretty sure he got lucky and got somebody who didn't know any better to bless it - lucky for both him and the shop that did it - it's an ugly shop license yanking, and car impounding nightmare



i've been doing this for 30 years, and it isn't that simple - turbos are NOT legal in california as aftermarket items without all of the stickers - trust me, if it were, i'd have one now - legality is the only thing stopping me from forced induction



buyer beware - looks like a great car, but a lot of headaches in california

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[Bruckner]

I'd be curious to know the details of this 968 Turbo S replica sale.



Since we're talking about installing a stock 2.5L 951 engine in a 968, a stock 968 intake manifold isn't needed. The 951 motor conversion is by no means simple or easy, but it's certainly more feasible than building and installing a 3.0L turbo.



Why is taking the TT out such a pain? Is it because it requires dropping the whole rear enchilada (trans, suspension, cross member..)? Anyone who's turned their own wrenches on a 951 have done this at one time or another.



I'm really stuck up on the intercooler issue, I suppose a custom fabricated one would be needed? Installation would probably require imagination as well, but it's been done before.



Regards,

Bruckner

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