Originally Posted by travis91
So far the best run on the car was 9.87 at 136 in cold air. But consistanly running 10.0's in 70-80 degree air. I decided to replace the cam and I emailed several cam builders with my combo and based on several recommendations ended up going with a Lunati grind with 110 Lobe seperation, 272/280 duration and .722/.722 lift. Installed cam at 107. Ran it for first time today and at 35 degrees ignition advance it was breaking up badly above 6000. Removed 3 degrees and it improved. Removed another 2 degrees for a total of 30 degrees to clear it up. The best run was 10.11. Checked the torque converter and verified it is stalling at 4000 and I will be replacing it after tuning in the new cam and putting it on the dyno to get its new torque curve to build the new converter. I am a little confused as to why 20 degrees more duration would require 8 degrees less advance. Anyone have any thoughts on what might be the issue?
I know your starting to dig a money pit here changing parts in all, but I'm gonna say your combo definetly warrants a 1050 dominator, converter change ( 8 incher, 5000 min, preferably 5500 stall) plus a intake change AND to further compliment the combo, more gearing(513)
Clueless as to why you'd need less timing with that cam though.
That dont make any sense to me? 30 TT :shock: I've never seen a BBC run with that low a timing, not worth a shiznit anyway.
Our combos are very similar, save for the smaller CI and the carb.
I run the same cam in my 496, (excellent choice by the way), I run TT @ 40 to 41, never misses a beat.
What plugs are you running? And what gap? I have merlin vr 345cc heads on my motor and use the NGK's racing plug in the #8 heat range gapped @ .032
I can get the offical part # if you like, just let me know.
Cp