1/8mile rpm w 34.5

i need to know rpms for several gear ratios 1/8 and 1/4
im running a 3spd lenco drive cs2 c screw blower promod brad 5
1st senario=1.35x1.28=1.72x3.90=6.739final=4.992 2nd
2nd senario=1.35x1.28=1.72x4.10=7.08final=5.248 2nd
(using 1st and 2nd for 1/8 mile and 3rd for 1/4 mile match
races only so 1/4 mile is not so important)
tire is 34.5 goodyear 1022 110 rollout growth unknown
may use housier 2055 110 roll out
i need to know 1/8 rpm with 4.99 2nd gear final ratio
also need to know1/8 rpm with 5.24 2nd gear final ratio
after this i need to know shifting to 3rd what 1/4 mile rpm
would be with a final ratio of 3.90 and 4.10
i dont know how to figure growth and all this stuff
just need 4 rpms for the different ratios
if someone could show me i will figure it
or maybe some one has a suggestion
sorry for the long post
thanks
618-781-4703
promod360r@yahoo.com
or pm me
duane

 

I did a little work on my desk top drag strip program (the program also includes tire growth) with your gear ratios. (Disclaimer! These numbers are queses because I was using my best guesses on hp, tq, areo drag, etc.)

1/8 mile rpm's
4.99 final - 8334 rpm's
5.24 final - 8769 rpm's

1/4 mile rpm's
3.90 final - 7827 rpm's
4.10 final - 8250 rpm's

Anyone with some real world numbers?

 

That 7800-7900 is what my numbers are with 3.89 gear and 34.5 tire.
Steve

 

tire growth

thanks guys
if the 34.5 rollout is 110 then at 200 what would
the roll out be
if i have this info i can play with my computech
calculator and figure rpms
i know this all depends on how quick you get in the
next gear
thanks
duane

 

My bad, the tire growth baseline is supposed to be 2.5" so your rollout estimations are close.

 

roll out

kenneth s i dont know what 25" is in total roll out
what would 110 " be with this 25 "
iv been figuring 112 and 114 at 200 mph 1/8 mile
thanks