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Question Electromotive XDI-2 tuning

Hi,

I just purchased a 1983 slant nose 911 that has been converted to a twin turbo. It has been bored to a 3.4ltr, mahl pistons, not sure what rods or cams they look like a form of SC cams. custom headers, twin k-26 turbos, twin plugged, and i just recently installed an electromotive XDI-2 system. I am new to tuning cars and have no experience, but I have started to play around with the timing chart and take the car for test drives. The car runs great under 3000rpm and seems to have a huge amount of power between 3500-4800rpm while it is building boost. However, once I get over 4800rpm the power seems to start to die down. I know that the redline of the car is 7000rpm. My mechanic assures me it is a timing issue, can anyone help me to figure out at what timing degree i need to be running at. I would say its almost at 1 bar of boost at 4800? or if i should advance or retard the timing when the boost kicks on.

Thanks,
Andy
Old 06-12-2011, 09:37 PM
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I would suggest getting the car to a professional tuner, Odds are it will end in tears otherwise. I would not suggest you start learning to tune on a P car, get a cheap Honda.
That way when you blow it up it won't hurt so much
Old 06-13-2011, 03:15 AM
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Totally agree with Jonty. Don't mess with timing unless you know what you're doing.
Adjusting timing on a 930 blindly is like giving a 25 year old girl a 930 to learn how to drive a stick shift.
Old 06-13-2011, 07:38 AM
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do you have a map sensor , thats the thing that a vacuum line hooked up to it, It should of came with the system?
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1986 944 turbo -first car
1997 993 Cab 6 speed-sold
1992 964 C2 turbo
SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo
Old 06-13-2011, 02:26 PM
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I Do have a map sensor with the program. I am just unsure what level that is suppose to be at, and I have only a slight idea about the timing. I went out and drove the car and changed the upper rpm and pressure timing by one degree at a time keeping all my timing under 30 degrees. My mechanic seemed to think this would fix the problem. While it might have smoothed out the transition between the "block" that i seem to hit at 4800 it just seems like the car still dies out above 5k rpm and it just doesnt have the acceleration that it does between 3500-4800rpm. If it is not a timing issue im not sure what it could be? Any help?
Old 06-15-2011, 08:56 PM
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call Clewett engineering they can help you, they designed the product, the owner will be glad to help you over the phone.310-406-8788
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1986 944 turbo -first car
1997 993 Cab 6 speed-sold
1992 964 C2 turbo
SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo
Old 06-16-2011, 06:47 AM
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That's very patriotic to attach the flag to your tail, nice work Helio.
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Old 06-16-2011, 03:45 PM
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Andy - Need to see pics of this twin turbeaux beast!
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Old 06-17-2011, 05:02 AM
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I uploaded some pictures into my garage. I not sure how to upload them directley into the thread, if someone lets me know how i will.
Old 06-17-2011, 10:11 AM
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Old 06-17-2011, 10:13 AM
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nevermind, figured it out here are some pictures if you want to see anything specific let me know and i can take more. Also, i am planning on calling clewitt later today, i didnt know if anyone knew of any good porsche mechanics or tuners in NORTH CAROLINA?

Thanks
Old 06-17-2011, 10:14 AM
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boost , electromotive , rpm's rpm , timing , twin turbo


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