RPM drop from 4.57 to 4.30 gears

[BadFish67]

What would be the drop in RPM's going from 4.57 to 4.30 gears. It's in an 8 3/4 with 29.5" tires. Coming through the traps at about 6400 and about to spray the motor with a 150hp shot so I need to drop some rpm's on the top end.

 

[70aarcuda]

4.3 divided by 4.57= 0.94 times 6400 equals...6016

 

[pettybludart]

I maybe interested in the 4.57,s if selling?

 

[BadFish67]

Thanks Tony!
I'm going to keep the 4.57 gears for when I change to a solid roller cam...then I wont need to worry about spinning up to 7000 rpm's

 

[abodyjoe]

What would be the drop in RPM's going from 4.57 to 4.30 gears. It's in an 8 3/4 with 29.5" tires. Coming through the traps at about 6400 and about to spray the motor with a 150hp shot so I need to drop some rpm's on the top end.

http://www.bigblockdart.com/techpages/speedtire.shtml