anybody running a 4.33 gear with 28in drag radials?
12-10-2010, 08:19 PM
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anybody running a 4.33 gear with 28in drag radials? i am thinking about running going to a 4.33 gear instead of my 3.90s when i switch from my 26in slicks to a 28in hoosier drag radial. i shift at 6500 but have the rev limiter set at 6800. I dont care if i have to go past 6500 in 3rd through the traps. how much would i be leaving on the table if i stayed with the 3.90s? im guessing i will trap around 130 but no more. i have a mid size cam and a 150 shot.
12-12-2010, 07:43 PM
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What size stall & efficiency? - A loose converter cancause the N2O to blow right through and hurt you times. The efficientcy could slip the rpms more and not make it through the 1/4.
What MPH? You can use the crossing rpm and mph to figure the efficiency of the converter.
The reason for these questions are you have to set-up everything just right. The combo above sounds like what I had before: N/A, 4.30 gear, 28" ET Drags, 4600 rpm stall. It would cross the 1/4 at 121-122mph / 6700-6800rpm.
I'm not an expert on N2O, but I don't think a 4.33 gear and a 28" drag radial is going to get you past 123 mph without being on the 6800 rev limiter. I would stick with the 3.90's and see how it does before changing them out. What did it mph/rpm with the 26" slicks?
12-12-2010, 08:30 PM
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I've done both radials and slicks. I prefer the slicks. M6 car here doing about 114 on best non-nitrous pass with a 1.63 (i think) 60' - launched it HARD 
). This was on stock cam running 12.16. I've since replaced cam and ended up needing to replace the posi . . . . twice . . .
). This was on stock cam running 12.16. I've since replaced cam and ended up needing to replace the posi . . . . twice . . . 
