I think we've been going a bit conservative on our timing with these cars.
And been talking to a few of the pros that have said as much
...was told to start increasing timing by the guys at precision turbos
I started at 20, I'm at 25 now.
And it seems fine at 20 lbs of boost. 25 lbs of boost and it doesn't quite like it
I think i'll try 30 today @ 15 or so lbs
(i might have a bit less compression than you do) 6x-8 heads on a 389
I'm also adding a MSD rpm activated switch today. Pull 10 degrees of timing at 3,000 rpm. So i'll try 35 initial locked out, and pull 5 or 10 at 3,000 rpm
I guess you don't have that issue with your mapping stuff. But still, i'd go higher on the timing...i think it'll take it
Have you looked into meth injection? I like mine. That might be why I can be more aggressive
Anyway, I'll be looking forward to your testing
Also interested in the difference in your spool time between the two
Was it significant?
I'm about to go from the 389 that spools at 3,000 - 3500 to a 461. Hoping it spools at 2,000 -2500 or so