60 foot help

B

bleedcummins

New member
Hey guys, first year racing and started the season pulling a 1.87 60'. Dropped the spare tire, went back to factory front bumper (lost 135lbs from bumper alone) and wired in lockup switch and was pulling 1.77ish 60' all year long. Swapped in a fresh vp44 cause old one had 100,000, several times at 0psi fp, and I thought it might be wore out, and my 10 runs since doing so I am back to a 1.83-1.87 60'.

With old vp and 7x.012 best 12.58@107 1.77 60'
With new vp and 7x.012 best 12.53@109 1.87 60' (backed up 12.53, but couldn't back the 109)
With new vp and 6x.013 best 12.48@109 1.83 60' (backed up both)

New vp just seems to be getting me out the hole slower
And help?
 
How thick is the smoke right after launch? Is the new vp providing more fuel down low and drowning it a bit causing it to come up on boost slower? Can you leave with more boost?
 
Th smoke is cleaner. Still boosting up to 20psi at the line, tried a couple runs at 25psi. Yesterday had one pass leaving 20psi had 1.844 60' next pass went to 25psi and cut a 1.814. Tried going 25psi again and it ran a 1.85.... Really inconsistent...

Just went though all my time slips this year and I was badly mistaken. Thought I had most passes in 1.7's but actually only had 8 of 39 passes in the 1.7's. I guess I only paid attention to my 60' on my fastest passes, never looked at it during my slower passes.

those 8 passes in the 1.7's were cooler days iirc. Any ideas then how to get it to cut consistent 1.7's, let alone dip deep 1.7's or high 1.6's?
 
No no spin at all. Tires are 285/75/17 toyo at2. Boost gauges are source automotive mechanical gauges so I believe they are accurate
 
I expected 20psi launch to really give me a "back in the seat" feel but it doesn't at all. Am I sorely mistaken? But with 1.8 60' it may not give that feeling I don't know
 
Converter is 150rpm tighter than stock.
suspension is stock rear with traction bars. front is 2.5" level...getting removed this winter
 
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