924Board.org

Paul · Posted: Sat Jan 22, 2005 8:18 am Post subject:

Sounds like a plan. Make sure they have the proper fuel system pressure specs since they are different than a 924NA.

Hopefully you'll be tearing up the twisties soon!

TajMan · Posted: Sat Mar 05, 2005 7:16 am Post subject:

Well the car has been at this shop forever, I guess it wasn't a priority for them. Basically they got the car idling, but now the car is smoking more.

Somehow the smoke is getting into the passenger area pretty bad and I don't know how its happening. The car pulls HARD under boost (once it hits 3K rpm's), but is still pretty rough in the lower rpm's. I'm thinking it might have a boost leak. What's the best way to pressure test for boost leaks on these cars?
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'87 924 S

CMXXXI · Joined: 05 Nov 2002 Posts: 1939 Location: Vicksburg, MS

The only way I know of to test boost is with a boost pressure gauge. They are relatively inexpensive and simple to install. You should see max values of approx 7psi on a US, or 10psi on a ROW car. There are a limited number of places that boost can leak... at the joints between 1)duct attached to compressor, 2)crossover piece, 3)throttle body, 4)wastegate & it's plumbing. Leaks in the system from the turbo to the throttle body will often whistle loudly as boost builds and nears max output. You can wrap the joints with tape and see if a leak tears a hole in the wrapping.

Personally, I think if you are getting good performance above 3K rpm, but poor performance under that, I seriously doubt it's a turbocharger issue since they don't really start building any appreciable boost below 3K anyway. I'm still inclined to think it's a fuel delivery issue or perhaps an air intake/vacuum leak.
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'79 Eurospec 931

TajMan · Posted: Sun Mar 06, 2005 5:45 am Post subject:

CMXXXI · Joined: 05 Nov 2002 Posts: 1939 Location: Vicksburg, MS

If there is an exhaust leak under the hood, and the seal that runs along the top edge of the firewall isn't there (or isn't sealing correctly), then those fumes can get sucked into the heater fan which is there at the base of the windshield just behind the firewall (seal plainly visible in photo below).

Click for larger image
If the fumes are are indeed coming through your dash vents, they must be entering through the ventilation fan. Other sources of exhaust fumes in the cabin are from a poor seal on the rear hatch glass, around the tail light fixtures, and from a missing/damaged/mis-aligned foam block that rides on top of the torque tube, at the base of the gear shifter.
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'79 Eurospec 931

TajMan · Posted: Wed May 04, 2005 1:29 pm Post subject:

I bet the smell is coming through the vent intakes at the base of the windshield.

The car has been sitting at the side of our house forever. I have no time to touch it, I just finished a paint job on a Corrado and I have a Stealth TT and Talon Tsi that need engines pulled and put back together. My brother just needs to get rid of the car, if anyone wants it. I've had it listed in my old autotrader add from a Jeep for $1,800 and I've got a few calls. Right now I'd say it needs the head rebuilt because of a valve not seating properly (and new exhaust manifold gaskets when this is done to fix the exhaust leak), and if its not perfect after that then a fuel distributor rebuild should do it.

What's the car worth in parts (all the new stuff listed in this thread, two new tires)? I'll end up parting it out later if no one buys it. If anyone is interested at all shoot me an offer: tajmjacobs2@hotmail.com

Someday I'll come back to the Porsche world, and when I do I'm sticking a Mitsu 2.4L stroker 4g63 turbo engine in a 944. Untill then I'm living in the Mitsu AWD Turbo world, and life is better there. Peace out guys.
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'87 924 S

TajMan · Posted: Tue Jul 26, 2005 7:40 am Post subject:

Car sold for $1,200. Was that an ok deal?

The guy here who bought it is going to rebuild the head, hopefully it fixes things.
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'87 924 S

TajMan · Posted: Fri Aug 05, 2005 10:02 pm Post subject:

bump

I also have a '90 AWD Turbo 5-spd Eagle Talon that I'm putting together right now with a new clutch and a new headgasket. Its a great car if anyone on here wants it, its going right up for sale...
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'87 924 S

TajMan · Posted: Tue Nov 01, 2005 2:41 am Post subject:

If anyone was wondering I believe the guy fixed the 924T by replacing the fuel distributor AGAIN. I replaced it once but I used a used unit and I guess it had its own problems.

Damn crazy mechanical Porsche fuel injection.

I got rid of my '90 Talon Tsi AWD too BTW, I've got a '90 VW Corrado G60 (supercharged, lots of other mods) for sale if anyone is interested:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4585975258#ebayphotohosting
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'87 924 S