gearing for the 1/4 mile
 

sbc should make 450-475 hp at the fly wheel
looking to go through the traps at 6800 to 7000 rpms
3700 lbs er so
3000 stall for now gonna bump it up to 3800
th 350
29 tall tire
right now i have 4.88's
looking for the "ideal" gear ratio for the 1/4 mile

Here try this site. it will give you lots of awnsers.

http://www.wallaceracing.com/Calculators.htm

cool thanks!

To all you racers out there, no matter what you race . . The Wallace Link is a mandatory tool in your tool box . . If you dont use it, start . . It's a great source of information and a better tool.

thanks for the info on that calculater sight.never heard of it before.sure does save tons of time just trying ti fiqure out something!!!!!

hotrod........U dont hav enuf converter for that tire an gear,,,,up it to a 5200 stall minimum maybe more expecially with the weight of car,ur not hitten the tire hard enuf with ur present stall,,, :shock:

wallace racing info
 

Thanks great site and info.....!!!!!

its driven on the street too 5200 is a little much isnt it?

Can't be any worse than those 4.88's on the street....

yes its way too much...the calculator is on a broad guideline its not 100% sometimes not even close...it has no way of knowing how your engine performs or transfers hp/tq thru the chassis to the rear tires...the traction itself leaves a big question Mark ?? even the brand of tires could throw off the formula.Just too many variables for it to be accurate...trust me I have seen guys run much slower and faster ET'S and Mph's then the calculator shows they should have run.. etc...


If you put a 3,000 rated converter in your 3700 lb car its probably gonna have a little more flash to it. it also has a lot to do with your camshaft.

If you have not purchased your converter yet...Do not purchase an off the shelf converter..

You need to call and have a converter built to the specs of your engine, rear end ratio's etc...


If your stuff is already together 4.88 gear etc... go and run it now and see what its turning thru the traps in high gear.

YOUR NOT AND I REPEAT YOUR NOT gonna slap off the shelf parts in there and run on the numbers...trust me on this and save yourself a bunch of $$$ and headache..do it right the 1st time...all its gonna cost you is a little more time a research