Quote:
Originally Posted by cole930
Hey Mr. Mark great to hear from you, glad you've stepped in here.
What are you using for initial advance at idle, when are you starting retard, how much timing do you take out per psi, what do you have at redline, and has initial advance enhanced you low end performance.
Cole
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Hey Cole,
You know, sometimes I feel like I'm playing with a very expensive fire, but I'm the kind of old guy that learns by doing. Take the best information I can get my hands on, use my own at times twisted logic, and go for it.
At idle I'm at 8 BTDC...as much as I could get twisting the distributor to it's stops. I'm gonna have to look at the dials again, but I think I set it to begin retarding at 1 psi boost and adding 1.5 degrees of retard for each 1 psi. So basically by 5 psi (about .34 bar) all those 8 degrees of advance have been taken out. Some may say that I should have all the advance gone by .2 bar, so maybe I'm living on the edge here. Would love to hear any comments in that regard.
At redline, I simply don't know (I rarely touch 6000). But at 4000 and no boost - tuning in the shop - timing is at about 34 BTDC (the 8 degrees I added at static plus the normal 26 from mechanical distributor advance). When on boost, 8 degrees of that comes off due to the MSD thingy, and probably another 8 degrees comes off due to the vacuum distributor boost retard, leaving about 18 degrees advance at full boost.
My goal was to add static timing and take it all back off at boost, resulting in the same advance @4000 rpms as the book calls for. I would like to try more static (as in up to 12 degrees) but the damn dizzy won't let me...yet!
Performance improvements? I wouldn't say it knocks your socks off, but I will say it gives more grunt and quicker revs from 2000 to 4000 rpms...which is where I wanted it. As a result boost seems to build just a little quicker, which is good for my 7006 turbo.
Mark