Question about trap RPM
 

I bracket race and usually run 1/8th mile, thinking about going to a 1/4 track.
car runs 6.90's @98 MPH just wondering how many RPM's i will pick up on the back half have heard from 500-1200

Re: Question about trap RPM
 

what gear & tire size you have?

Re: Question about trap RPM
 

4.56 and 28x10.5 slicks

Re: Question about trap RPM
 

Wallace calculators (an online drag racing calculator page)
http://www.wallaceracing.com/Calculators.htm
says if you're going 96 in the eighth, ideally, you're going to go 120 in the quarter.

It also says that 120 mph with a 28" tire and a 4.56 gear is 6,600 rpm. If you have an automatic, it will be more; how MUCH more will depend on how much converter slippage you have at the finish line.

These numbers are, of course, "ballpark" figures; don't trust them to be 100-percent accurate, but they will probably be fairly close to reality when the dust settles.

Hope this helps!

Re: Question about trap RPM
 

There is old formula gear ratio X mph X 336 divided by tire height= RPM
accurate on stick. Auto allow for converter slippage.
Mike Taylor 3601

Re: Question about trap RPM
 

4.56 and 28x10.5 slicks

Been there....6000-6500 RPM in the traps. How many rpm's are you turning now?

Re: Question about trap RPM
 

you'll be fine!