The Twin Screw Thread
12-19-2005, 05:07 PM
#316
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Originally Posted by Daryl
Bill,
Have you tried unplugging number seven to see any difference to the idle?
Tony,
I am running 8 lbs boost intercooed, no BIGI, only an 85-86 fuel regulator and the two dampers. I have 30 lbs pressure at idle and I don’t know what it is at full acceleration. I do know that the A/F gauge sees 12s. flat out. This how Andy told be to do it!
Quote from one of Johns posts earlier:
“The development car runs 42#injectors with a stock S4 fuel system No RRFPR or other device. It is fully mapped up to 495HP crank. That's just an example”.
Someone please tell me how to make those nice grey boxes with the quotes in side.
Have you tried unplugging number seven to see any difference to the idle?
Tony,
I am running 8 lbs boost intercooed, no BIGI, only an 85-86 fuel regulator and the two dampers. I have 30 lbs pressure at idle and I don’t know what it is at full acceleration. I do know that the A/F gauge sees 12s. flat out. This how Andy told be to do it!
Quote from one of Johns posts earlier:
“The development car runs 42#injectors with a stock S4 fuel system No RRFPR or other device. It is fully mapped up to 495HP crank. That's just an example”.
Someone please tell me how to make those nice grey boxes with the quotes in side.
You must use the (QUOTE) and (/QUOTE) tags (replace parenthesis with brackets)
You can also click on the "quotes" in the lower-right hand corner of another user's post to quote his/her post.
12-19-2005, 05:13 PM
#317
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The snout pulley sits back too far.
Can you illustrate the alignment issue for me? I have access to another twinscrew car I can check and see if it has the problem.
Originally Posted by mspiegle
Can you illustrate the alignment issue for me? I have access to another twinscrew car I can check and see if it has the problem.
12-19-2005, 05:26 PM
#319
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Originally Posted by mspiegle
Ah, so you DO have a jag unit. Are you saying that you tried this with a stock jag pulley and it didn't work?
The SC pulley didn't line up with the crank pulley. I don't remember the size specs on the pulley that is on the SC now or if it is a Jag pulley, I think it is a Kenne Bell pulley.
12-19-2005, 05:56 PM
#321
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Yes, I'll second Jim's comment - Mike, you've been a GREAT help to us and Andy, and we do hope you get back into a 928 soon.
Glad to hear Andy is busy with other things. There was a time when the SC kept him from having anything else in his life, and I'm glad that has changed for his sake. I do hope he gets a chance to drop in here and contribute, but having you here makes that much less critical.
Thanks again,
Glad to hear Andy is busy with other things. There was a time when the SC kept him from having anything else in his life, and I'm glad that has changed for his sake. I do hope he gets a chance to drop in here and contribute, but having you here makes that much less critical.
Thanks again,
Last edited by Bill Ball; 12-19-2005 at 06:16 PM.
12-19-2005, 06:08 PM
#322
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I will second that, Bill, as soon as he lives up to his commitments...
Originally Posted by Bill Ball
Glad to hear Andy is busy with other things. There was a time when the SC kept him from having anything else in his life, and I'm glad that has changed for his sake. I do hope he gets a chance top drop in here and contribute, but having you here makes that much less critical.
Thanks again,
Thanks again,
12-19-2005, 07:03 PM
#323
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Originally Posted by Daryl
As per Andy’s instructions I am not using a BEIG. I only have the 85-86 Fuel regulator and the two dampers.
Glad I could help on the regulator/injector understanding.
12-19-2005, 08:30 PM
#325
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The regulator has a spring in it that sets pressure to 2.5bar/36psi. The vacuum line on the back either assists the spring (boost) to close down more increasing pressure or fights the spring (vacuum) to not allow it to close as much decreasing pressure. Whatever you're manifold pressure is relative to atmospheric, add that to 36psi and you'll have a rough idea of your fuel pressure.
12-19-2005, 11:40 PM
#326
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Someone asked earlier what size tires I was running...
265/35/18
Also, Sab asked earlier why his and Camerons Sharks would go into limp mode occasionally and that this only happened when idling. i wonder if in some weird way this is connected to the #7 mystery?
265/35/18
Also, Sab asked earlier why his and Camerons Sharks would go into limp mode occasionally and that this only happened when idling. i wonder if in some weird way this is connected to the #7 mystery?
12-19-2005, 11:52 PM
#327
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Originally Posted by Jim_H
Also, Sab asked earlier why his and Camerons Sharks would go into limp mode occasionally and that this only happened when idling. i wonder if in some weird way this is connected to the #7 mystery?
12-19-2005, 11:57 PM
#328
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Yep, and if #7 isn't getting enough air...
Originally Posted by FlyingDog
Maybe their cars have that weird EGT system Porsche put on the later cars to prevent cat fires?
12-20-2005, 12:50 AM
#329
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Could be, but my car never went into 4-cyl mode at idle despite #7 being dead as a doornail at times and me pulling things off whatever cylinder and running it that way while testing. The system is present 89+ and changed in the GTS years (relocation of the sensors).
