Who is useing Header extensions?

mopar65 said

I thought the last time i raced it, I was turing 7100 shifting at 6500. My friend said he was going through the end at 7500

Click to expand...

I too have a 28 tall tire, 4.30 gear, and run more mph.
I cross the stripe at 6400.
If you are doing more than that, especially if you have a bias tire( I have a radial, doesn’t grow), your vert
is a major issue or your tranny is slipping... less likely

7100 at 114-115 isn’t right.
That is more like the rpm for a 10.50-10.60 ish pass with that tire and gear, if not quicker 124-126 mph