Drag Racing Discussions > Front Engine Dragsters
Rear Tire selection
dusterdave173:
Up in Smoke
I hear ya--don't worry just keep on and experiment--Mt car will yank the spit out of your mouth leaving at 4000 but I have toned it way down on the leave RPM until I get more seat time--the car really has multiple personalities depending on launch RPM, tire pressure, wheelie bar height etc I also have a very loose converter that gives the car more 'range" It does pretty well no matter what--I am thinking a tighter converter would not be so good--I bought this one on a gamble but it has turned out fine.
My car does seem to pick up wheel speed with less tire pressure--I can lower it enough to haze the tires on leave--Everyone around me acts like I am crazy when I had 9-11 lbs in them but it sure did hook!!!!
My car also seems to like more weight on the nose so.....It is all a balancing act--check back about Labor day and I will know more :)
Keep records--have someone that knows what to watch keep an eye on every run--the REPLAY XD MINI video camera is less tha $140 delivered and is EASY AS PIE to use--big help!!!
masracingtd1167:
While we are talking about tires I guess Jon might be able to answer this question . How much do you think that 2585 tire grows at 180 to 190 mph ? I am thinking about changing my rear gear from a 4.56 to a 4.88 . Right now I am crossing about 8700 at 182 and I think I should be crossing a little higher . Raising the shift from 8800 to 9000 picked the car up about .03 so I am thinking the gear change might help . I am still using a 1.80 first gear and thinking of going to a 1.69 . My 60 ft's are around 1.05 1.06 .Thanks Bill
Roger:
Hi Bill, what size tires are you running to get those numbers?
masracingtd1167:
Roger I am using the Goodyear 2585 tire 12x31 . My combination is a little different than most . My motor is a 394 cube smallblock with an old set of 18 degree Comp eliminator heads . I run a pair of Rons terminator 's on a sheet metal manifold . It's a little different but pretty quick and I an allways trying to make it quicker !
Compsix:
If anyone is interested we have a set of 31x12x15 hoosiers that we have two runs on and then decided to go a different direction with our tires.
$400 you pay the ride....
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