What is the best Gear for drag racing

FRPP 4.10's!

For Drag racing
if you are N/A the best would be 4.30s with 4:10s in a close second

Most people with power adders run a 3.73 gear even though I have seen a few run 4.10s

try2catchmy99 said:

For Drag racing
if you are N/A the best would be 4.30s with 4:10s in a close second

Most people with power adders run a 3.73 gear even though I have seen a few run 4.10s

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agreed.

It will depend heavily on your setup though, and will the ONLY be used for drag racing or will it be used on the street too? And is this auto or manual?

KB recommend 3.73 with the manual box because with 4.10's you run the risk of spinning the blower to fast which may cause damage to it.

That is a good question and depends on a lot of factors, like what mods have you done, cam change, heads, what does the engine rev, when does it stop pulling, what transmission ratios do you have, what height rear tires are you running, etc. Most will say if you are close to stock, maybe exhaust, intake, tuner then 4.30's or 4.10's depending on your tire height and rpm limit. If you could get an idea of how many rpm's you need to be turning at the finish line then gear towards that. Ideally you want to be using all your useable power from the engine as close to the finish line as possible.

4.10's

hotrodnut said:

That is a good question and depends on a lot of factors, like what mods have you done, cam change, heads, what does the engine rev, when does it stop pulling, what transmission ratios do you have, what height rear tires are you running, etc. Most will say if you are close to stock, maybe exhaust, intake, tuner then 4.30's or 4.10's depending on your tire height and rpm limit. If you could get an idea of how many rpm's you need to be turning at the finish line then gear towards that. Ideally you want to be using all your useable power from the engine as close to the finish line as possible.

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there are so many factors too consider.

I couldn't agree more. You also have to consider that everything changes again if your are talking about an 1/8 mile track vs. the venerable 1/4 mile track, too.

well what you would do for a race car is try to have it set where you are coming through the traps in you 1:1 gear at your peak rpm. not nessesarly realine but peak power producing rpm.

The factor is trap speed basically. if you run out of gear you will have to shift into overdrive. If you are not all the way to the end of you powerband you are proably leaving ET on the table.

For a stockGTit is probaly 4.30's as I think you would hit the rev limiter in 1:1 with 4.56's. Now a cobra could proably run 4.56's just fine because of its higher redline.

once you start moding you kind of have to play with it. you can also play with your rear tire size as well. if you put in 4.30's and started running out gear you could run a larger tire in the rear if you did not want to change your gears.

it is all about rpm's to make a short story long.

my advice would be to mod the car. go run it. take a look at your trap speed. then start doing some math. there are tones of calcutators on the web where you can enter you tire size, gear ratio, and it will spit out MPHvsRPM.

you need to run dyno numbers to know where you make peak power and ge gears that compliment that the best