Re: starting line gear ratio?
 

guys, thanks for the input. the charts are very neat. very possibly the Dick Miller 11.25 # was with a torque converter [didnt say in the book] and when you ad in torque multiplication, it changes everything.
with mine,as is, at 13.69, its high from Miller and low for both the 2 charts. however, I will rather be under geared than over reved at the stripe. plus I could just gain more MPH if the engine will continue to pull.

have to wait till Thanksgiving to run at Vegas [that just sucks-every track in the country is runnin' except Vegas]
Thanks again, all.
Rod in AZ

Re: starting line gear ratio?
 

It was a copo with a 409cid LS. The explanation may not be up to your standards, but at least I understand the announcer when he says "this is a copo.

Re: starting line gear ratio?
 

Need Help,2350# 15x33 tire,6.20 rear gear. going stick racing with G-Force 2000,Ram billet Clutch as reccomended by Mike @ Ram. tranmission is coming from G-Force with 3.167 1st,2.148 2nd,1.576 3rd1.250 4th 1.000 5th according to my calculation SLR of 19.63 ,engine makes 850@8750 and peak torque 595@6500 is this too much SLR ?

Re: starting line gear ratio?
 

That sounds like a lot to me in that light a
racecar and that HP!

Re: starting line gear ratio?
 

I’m thinking 4.56

Re: starting line gear ratio?
 

Yes that seems very high.


Without changing anything, I would think it would like launching in 2nd much better than 1st gear.


Stan

Re: starting line gear ratio?
 

Hey guys do the math for me and tell what you think.
987 Hp
5.83 rear gear
2.81 1st gear G force 2400
3200 lbs
33 x14.5 Goodyears
Really don’t want to go over 9500 but I can in 4th if I have to

Re: starting line gear ratio?
 

► 5.83 * 2.81 = 16.3823


Looks good to me. That is just about 1% different than I calculate as a good starting place.


Stan