Went to track got a ?

[YELLOW 94]

Last night I ran a 12.8 at 116mph. At the end of my run I was red lining 4th gear at 6000rpms. Im gonna buy some drag radials cuz im getting no traction. Should I buy a taller drag radial, and if I do, how much taller. Back tires are 275/35/18.

later
Orlie
Posted via Mobile Device

 

[Stopsign32v]

You wan't to be at the top of 4th gear as you go through the traps. But with winter coming your car will make alittle more power so you could run into problems with running out of rpm. So I say yes to the slightly taller tire. If you go to the track alot invest in some 15" wheels.

 

[Grn92LX]

Impossible to answer w/o knowing the combo and rpm range of the combo.

 

[94CobraPace]

In therory, yes a tall tire will make the RPMs go down at the traps. Think of other issues also, possible a lower 60'.

 

[Pokageek]

no idea without your mods.

 

[YELLOW 94]

mods listed below

 

[sage2k]

275/35/18 + 3.73's means at 116mph you should be at 5685rpm
at 6krpm you should be at 122.5mph
so your tach is probably off

 

[YELLOW 94]

I went to my car and looked at the pill in my shift light and I have a 5.4 pill. I thought it was a 6.0, Im such an idiot. So maybe I was around 5700 going through the trap. Its hard to look at the gauges when your racing. How did you figure out my rpm.

later
Orlie