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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,235
Originally Posted by Alan L View Post
Yes, probably - given his turbo is probably heating up under high load - altho I think he posted earlier the headers glowing at idle?
but if he is getting 26 deg adv at 4000 rpm, and is at 10 deg ATDC at idle, I think this means he would have a strange map in the dizzy. I think if the dizzy map is stock, one should follow the other - 2 ATDC deg at idle, and 26 deg BTDC at 4000.
Fredmeister might be able to confirm this.
I think my pulley is marked at 5 degree ATDC and again at 29 degree BTDC but I am not sure. Could be 2 and 26 as the marks are hard to tell visually. I would have to run my timing light on them to confirm. I will keep this in my list of things to do when I pull the distributor out to fix this dam oil leak I think is from the dizzy o-ring and need to retime the engine.
Either way, I run at 0 degrees BTDC right now on my engine and its happy. I think I may be pulling 26-28 degrees BTDC at 4000rpm, but its been awhile since I timed the engine.
I would love to run 5-10 BTDC but this would cause me to be too far advanced under boost with the stock dizzy. I really should go to an adjustable ignition unit like Cole and other guys are using that allows me to dial out even more advance with boost.
1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, B&B intercooler, Snow Perf water/meth injection, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.7bar max
---"When you're racing it's life! Anything else either before or after, is just waiting"
Old 04-12-2012, 07:04 AM
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