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Old 03-26-2009, 04:55 PM   #1
lovemyp-car
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Default 944 V8 swap (with pics)

there's been lots of discussion on this recently, so here's my take...
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Ethan Cooper (22)
1987 Porsche 948 - 1997 LT1, Dual 58mm BBK TB, port matched intake manifold, LS1 MAF, LT4 Hot Cam, Comp Cams 1.6 roller rockers, dual 3 inch exhaust. See car here ->http://www.youtube.com/watch?v=oamLBaXyiCI
1986 951(S) - Zermatt Silver on immaculate black leather, sub 40k documented original miles engine from an 89TS.

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Old 03-26-2009, 04:58 PM   #2
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Old 03-26-2009, 05:50 PM   #3
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for the info, since i know people will want to know and i can't leave ya'll hanging

1987 Porsche 944 with 214,000 miles on the original motor
1997 LT1 from a Pontiac Firebird Formula. Has LT4 hot cam, 1.6 aluminum roller rockers, dual 58mm throttle body and intake. Should be pretty quick.

I'm using a friends garage for the swap (he's a motorhead too so it worked out nicely). He's got a rolling block and tackle mounted to a huge *** I beam stretching the width of the garage. He's also a steel worker (welder) so he helped me make the motor mounts and modify the oil pan.

I pulled the engine out the top, it was not easy, but i didn't have the right equipment or setup to lift the car high enough to get the engine out the bottom. The only places i had trouble were the crossmember (where the old oil pan hit) and the alternator hit the frame i believe.

At the moment the engine is bolted in there, but the wiring isn't hooked up and i don't yet have a throttle cable. I also need headers (which i might build) and a different crank balancer to run the alternator.

Should be fun! I only have 3-4 weeks to get it mostly done (running) before it MUST be finished (school project...) so i've been really stressed the last week.

Here's a quick question for you gearheads. I'm trying to make my own steam pipe (the coolant steam pipe that goes between the back of the heads to vent the heads if the coolant boils). I don't have the original steam pipe, plus it'd be easier to run the pipe straight to the coolant overflow instead of around the front of the engine and then over.
So i need to find a 90 degree elbow and a T fitting that's 1/2in by 18 tpi (I think, i'll have that verified soon). I've tried Mcmaster Carr and they probably have it, but i called them and they weren't quite sure how to help me. Anyone have any ideas?
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Ethan Cooper (22)
1987 Porsche 948 - 1997 LT1, Dual 58mm BBK TB, port matched intake manifold, LS1 MAF, LT4 Hot Cam, Comp Cams 1.6 roller rockers, dual 3 inch exhaust. See car here ->http://www.youtube.com/watch?v=oamLBaXyiCI
1986 951(S) - Zermatt Silver on immaculate black leather, sub 40k documented original miles engine from an 89TS.
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Old 03-26-2009, 07:41 PM   #4
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nice job
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Old 03-26-2009, 07:50 PM   #5
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thanks! its a coming!
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Ethan Cooper (22)
1987 Porsche 948 - 1997 LT1, Dual 58mm BBK TB, port matched intake manifold, LS1 MAF, LT4 Hot Cam, Comp Cams 1.6 roller rockers, dual 3 inch exhaust. See car here ->http://www.youtube.com/watch?v=oamLBaXyiCI
1986 951(S) - Zermatt Silver on immaculate black leather, sub 40k documented original miles engine from an 89TS.
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Old 03-26-2009, 08:10 PM   #6
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That looks like it's going to be alot of fun!

Keep us updated!

Also why did you pull the driver's seat?
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Old 03-26-2009, 09:13 PM   #7
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it made it a lot easier to get under the dash and disconnect the brake pushrod from the brake pedal (and get to the three nuts holding the cereal bowl on) when i removed the seat. Just gave me a lot more room to work in
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Ethan Cooper (22)
1987 Porsche 948 - 1997 LT1, Dual 58mm BBK TB, port matched intake manifold, LS1 MAF, LT4 Hot Cam, Comp Cams 1.6 roller rockers, dual 3 inch exhaust. See car here ->http://www.youtube.com/watch?v=oamLBaXyiCI
1986 951(S) - Zermatt Silver on immaculate black leather, sub 40k documented original miles engine from an 89TS.
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Old 03-26-2009, 09:16 PM   #8
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What are you going to do for engine control?
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Old 03-26-2009, 09:20 PM   #9
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stock ecu with a tune from pcmforless.com most likely
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Ethan Cooper (22)
1987 Porsche 948 - 1997 LT1, Dual 58mm BBK TB, port matched intake manifold, LS1 MAF, LT4 Hot Cam, Comp Cams 1.6 roller rockers, dual 3 inch exhaust. See car here ->http://www.youtube.com/watch?v=oamLBaXyiCI
1986 951(S) - Zermatt Silver on immaculate black leather, sub 40k documented original miles engine from an 89TS.
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Old 03-27-2009, 12:33 AM   #10
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What kind of tranny and when it comes time I'd really like to see picks of the hook up to the torque tube.

Awesome
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Old 03-27-2009, 12:37 AM   #11
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please tell me your painting the engine bay yellow............

(btw i hade to paint mine black cuz it was gold when i got the car.)
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Old 03-27-2009, 01:59 AM   #12
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Oooh, shiny.

Would like to hear lots more about this. I'm planning on having an LS engine dropped in later this year, so whatever mistakes you make, I can learn from, and whatever obstacles you hit, I can hopefully avoid.

Looks good so far, though.
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Old 03-27-2009, 08:35 AM   #13
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Hey, nice job, i think i have seen you posting on the hybrid forums, I just placed an order for one of those bad *** adapters for the c5 bellhousing that one of the members is making. Good luck. You would probably have better luck getting your questions answered about the steam pipe from a chevy board.

Mark
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Old 03-27-2009, 10:50 AM   #14
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Good for you Ethan, I knew you could somehow pull this off.

See you at Hershey?
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Old 03-27-2009, 11:21 AM   #15
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god those just fit so nicely.

if and when i blow up my 2.5 with too much boost i will put one of these babies in. LS2 and then i could just take the SC stuff from the 944 engine and transfer it to the chevy
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Originally Posted by raleighBahn View Post
You have a silent scream in your throat as you blast over the crest of the hill, smell of crankcase fumes in your nostrils, over-revving and over-boosting your 2.5L, and then out of the corner of your eye - was he in the passenger seat all along? It's Lart, cloaked in black with a hood, and holding the reaper's scythe - head thrown back and cackling like a hyena.
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Old 03-27-2009, 11:21 AM
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