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Author Topic:   how much gear should we be runnin
fastow
Member
posted July 18, 2003 12:28 AM
you can run a higher gear on a slick track and get away with it where it would bog the engine on a tacky track. the problem with a high gear on a slick track is once you get the tires spinning, it takes longer to get them hooked back up with a high gear. the good thing about a high gear on a slick track is it doesn't get you as loose getting into the corner as a low gear does. either way you look at it, it's driver preference. it's a double edged sword....


uforacing51
Member
posted July 18, 2003 09:07 AM
I feel you have to run what the engine likes, I don't really have the budget to change gears alot so I stick with one set unless I can borrow a set and try them to get a grasp on the results. If I like the results then I may purchase a set. I believe running much more gear on my car may blow the engine, I can't afford that either.


lucky13
Member
posted July 18, 2003 10:31 AM
most generally you wont burn down an engine if you retard the timing afew degrees,4-8 is about all you need.dont try to advance it above what your engine builder sets it at,that will burn it down!


lucky13
Member
posted July 19, 2003 09:13 PM
Its all in what a driver likes and its hard for most people to understand and Ive tried explaining it to some people with very little luck. I myself like to run all the gear my motor can stand (final ratio numerically higher) I like to have my power there when I can use it...and earlier in this post one guy said something about being able to hook up sooner and I agree...Its mainly got to do with car MPH verses wheel spin speed and driving thru the wheel spin....Hope somebody makes heads or tails of this.....Towman


MOD75D
Member
posted July 23, 2003 05:46 PM
I run 5.43 on a 3/8. I turn about 6800. I talked to some other drivers and they all run 5.67 and they turn 6800? Do you guys think that I should go to the 5.67?


fastow
Member
posted July 23, 2003 11:04 PM
Another opinion is when your coming off the corner there is usually the point where you can mat the gas if your run say a 5:67 over a 5:43 your going to be turning around 2-3 hundred more rpms what ever that would be at that point. If you look at dyno sheets off most engines and compare the horsepower at any given rpm vs 2-3 hundered more rpms you would see that you will most always have 10 to maybe even 25 or more horse advantage. Next take that horsepower #'s and muliply by your gear ratio and you will see that we have a lot more power to use at the rear wheels to accelerate the vehicle. The next point to be made is are you better off lugging a engine all the time or turn more rpm's and free it up some. Something I would like to try is put a rpm chip in at what ever you like to turn the engine then gear till your just hitting the rev limiter maybe some in a good fast heat race when the track is at its best that seems to me where we see the most rpms.


MOD75D
Member
posted August 10, 2003 01:55 PM
I just wanted to say that I changed my gear and went to a lower gear (higher number) and boy what a difference. I didnt have near the wheel spin that I did. Thanks for your guys input. The car had so much forward bite it was crazy. I got the best finish of the year with a seconed place, only to be beat by a several time track champ. Thanks again for your help!


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