engine ideas?

[AeroSS_87]

I've been bouncing around many different ideas for the engine in my 944. One thing's for sure, it isn't getting that kruddy 2.5 n/a engine again. I had different V8 ideas, but anything worth while is too damn much. So I'm thinking right now aobut doing a 968 engine swap. Anyone know just how hard this would be and/or what needs done to make work? I would probably have the engine re-ringed and get it all fresh before install.

Any other engine suggestions that might be different than most? I like having one-of-a-kind cars, so shoot me ideas!

[todd951]

http://www.ronpatrickstuff.com/

[JivenJim]

If you just do the 968 Engine Dont forget you Still got say 4500+ for Engine, DME Wiring Starter. Then You could do leave the tranny. In Reality your probably still in for at least 8000. You Could rebuild your Engine, Put in low compression Pistons and Boost it on a Speed Force Racing Supercharger Kit for le$$ and similar power. http://www.speedforceracing.com/productsporsche_superchargers_944v8.php

But if your begging for work...
I Swapped a 968 into a 924S

I heard The Rennagad V-8 Swaps will cost you at least 12000.

Yell back if you have any questions.

And use the Search. It's been done here.

Todd, Thats a Hot Bug but I think it's over budget.

[AeroSS_87]

great idea, although the cost thing constitutes as an issue.

edit: that was for the jet propulsion.


I thought about the supercharger setup, just don't know about keeping that old 8 valve. we'll see

[JivenJim]

The Engine Should Be Rebuild with Fresh seals, Rings, and Bearings.
Do it right or just add some NOS and Drive it till it goes. No Cheap way man. Sorry.

[Razorback1980]

I want one of those jet engines so the next time someone is following on my bumper a little too close, I can toast em. One quick blast from the afterburner and problem solved!

[AeroSS_87]

^ that'll teach em to tailgate a Porsche

[fast924S]

That 2.5L engine isnt a bad engine, Why not rebuild it and trick it out, get some custome JE pistons set bored it out to 3.0 and a 10.5CR, Put in a Hot cam, do some bottom end work, Get some head work and you will be having fun for less then your other options. Or go the other way with the pistons, bore it to 3.0 but lower the compression to 8.5 and BOOOST it. The 2.5 inst so bad, it just needs alot more attention the other engines, There is plenty of aftermarket stuff and if its to slow just open the motor up and do some stuff. That is unless your looking for REALY big HP numbers

[Razorback1980]

The cool engine would be one of the 5.4L Ford they put in the new Mustangs that have over 500 rwhp with 480 ftlbs of torque and still gets 20+ mpg. It's amazing they can do that. Probably too much engine for our lightweight cars, but it sure sounds fun. Tire companies would love it. Schizachaser and I were talking about a kit for a smaller V6 GM motor....maybe the 4.3L. That would be about the right amount of power and weight and all the cheaper performance parts are readily available for that engine. The big question is whether the transmission would hold up or not. Ok, so the real questions are whether I would know when to use that power (Well...yeah...constantly) and whether I could avoid all the tickets.

[AeroSS_87]

Originally posted by fast924S
That 2.5L engine isnt a bad engine, Why not rebuild it and trick it out, get some custome JE pistons set bored it out to 3.0 and a 10.5CR, Put in a Hot cam, do some bottom end work, Get some head work and you will be having fun for less then your other options. Or go the other way with the pistons, bore it to 3.0 but lower the compression to 8.5 and BOOOST it. The 2.5 inst so bad, it just needs alot more attention the other engines, There is plenty of aftermarket stuff and if its to slow just open the motor up and do some stuff. That is unless your looking for REALY big HP numbers

I've been leaning this direction since last night. I really like broadfoot's stuff, but a simple rebuild is 3500. I can only imagine some nice JE's, cam, rods, etc. I'd LOVE to boost the car though. Maybe if I use some good raceware fasteners, really good head gasket and low pistons, I could do a low-mid boost turbo on it? I don't know what the stock rods are rated for, but I would think 12 psi set all day long would be no problem.

Thoughts?

[AeroSS_87]

Oh, and I got the hookup on megasquirt stuff, so the electronics won't be an issue.

[fast924S]

Sweet it you can get the megasquirt. Why not do the rebuild yourself?? Just send the crank/block and head out to a good machine shop. You can get JE pistons/sleeve combos, SOmetimes you can even find the used on Rennlist. I dont think they are THAT much money maybe like $1,500 which isnt tooo bad for what your doing. You could do a custom turbo setup, But its gonna cost money also. I think 12psi could be done, givin you use the right stuff and a good tune, also make sure you have a wideband AF senor and a knock senor too help tune.

[AeroSS_87]

Well from digging around the net for a couple hours, I think I've got the perfect blend of time/easiness-money-final product.

Lindsey's cnc head is only $500. That alone is good news.
JME solid cam
2.8 stroker with wiseco pistons/carillo rods
Megasquirt II - LM-1kit
ZEX 75shot

That's the essential part. With that, I'd do a good sachs clutch and fidanza flywheel, new torque tube bearings. The lower 1st gear would be nice, so I won't need a new trans, although I'll keep my eye out for an LSD.

So what is the math for the 2.8 stroker? I see the pistons and rods, but what crank? The 3.0 968 crank?

[AeroSS_87]

Also, is there anything else besides JME's $5600 over-done intake plenum out there?

I also forgot to add that I'd be doing a really good fuel system. Maybe over-done, but a full lindsey racing fuel rail kit and stock turbo injectors with a HV Bosch fuel pump would be nice assurance for sufficeint fuel supply... and look really sweet with all that anodized aluminum

[fast924S]

I think lindsey racing might have one too but Im not sure. They are WAY to much money, Problem is nothing for the 924/944/951 is really mass produced by big companies its all small performance shops that spend alot of time in R+D so the price goes WAY up. Your best bet would be to junk the Barn door air meter and install a MAF or MAP setup. Also see if you can get the throttle body bored out.

[AeroSS_87]

Originally posted by fast924S
Your best bet would be to junk the Barn door air meter and install a MAF or MAP setup. Also see if you can get the throttle body bored out.

Excellent idea. Thanks for all the advice. I'm really anxious to see how much I can squeeze out of an N/A engine! hah

[fast924S]

My MAF setup is old from Huntley but it works and I like it ;-) Really free's up intake flow. Pic is old porsche is apart again :-)

[AeroSS_87]

Any ideas on where I can find a 3.0 crank instead of the $3700 genuine porsche unit?

[fast924S]

There are 2 2.8 liter conversion on Rennlist classifids pisotns and connecting rods and crank

[JivenJim]

AM914 had a 3.0 Crank a few months ago. Search Back on the Classified an PM him to see if still Available. Lindsey also sell some. Maybe check DC Motors (junkyard in Florida)

Lindsey's Valve Job with Port and Polish would be a good way to go. Call and ask to Talk with Dave Lindsey. I think he knows about everthing in regards to this stuff. Also that Mass AFM like Fast 924 has. Looks Great Fast!

I went through the number on going to higher compression pistons. I believe it was about a 3% increase for a 1 CR ratio Increase. And when I worked out the cost of say $1700 to Bore and Sleeve, $1100 for Connecting Rods, $900 for JE Pistons, $500 AFM, $600 CAM Regrinds. I would think all that would be good for less than 180Hp total, on the 944. The Lindsey Fuel Rail, Dampener, Turbo Injectors will not help and the injectors will not be correct flow for burn rate. www.Witchhunter.com Can Clean your Stock and would think if you have a good Wideband 02 and AFM your Stock injectors would be able to fire increased duty for extra Volume. Also I believe the Turbo Injectors have either a different Impedance or ballast resistors. Sounds fun but expensive for little gains.
FYI you could buy a set of 944S2 or 968 Connecting rods from a Junk yard and save 80% of new Conn Rods and they good for 320 hp or so. But not necessary for minor gains you're seeking. If you want drop some Rotating Weight try knocking 20lbs off the Crank and Knife edge for $500 machine shop.
Fast... What kinda numbers do you think he could get outta these mods he's talk'en bout??

Hope that helps.