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Lowering gear ratio: loss of traction vs gain in acceleration

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Old 01-01-2011, 04:03 PM
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Default Lowering gear ratio: loss of traction vs gain in acceleration

I only go to the drag strip a few times a year so I want to stay with stock tires/suspension setup.

I'm in a M6 with stock 3:42 gears.

Want to go to a 4:10 gear.

Would the gain in acceleration be offset by the loss of traction launching on street tires?

FYI: my drag strip is an 1/8th mile.
Old 01-01-2011, 04:17 PM
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a lot depends on the prep of the track. The track I go to on Fri fun nights is an 1/8th mile also and on ET streets I still dont track the best with over 430 horse though. If you go to the 1/8th about 30 miles away on a friday they prep it well enough to hold my buddies dragster
Old 01-01-2011, 05:18 PM
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If you don't want to do any suspension or tires to make it hook then why put gears in it?
Old 01-01-2011, 05:22 PM
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Originally Posted by MUSTANGBRKR02
If you don't want to do any suspension or tires to make it hook then why put gears in it?
Well...I guess that's my question. Would the car be faster in the 1/8th?...if so, then that's why I'd lower the gear ratio.
Old 01-01-2011, 06:55 PM
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save money and buy a 9 inch.
Old 01-01-2011, 08:14 PM
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Originally Posted by MUSTANGBRKR02
save money and buy a 9 inch.
That doesn't answer his question in any way. Nor does that matter for this topic at all.

OP: If you put 4.10's in your car it will break the tires loose easier. If you are already burning the tires off, a new ratio isn't going to help you any. If you play around on the street and do roll racing the gears are going to give you a better advantage (assuming you aren't burning out from a roll.)
Old 01-02-2011, 04:42 AM
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Originally Posted by Ethan[ws6]
That doesn't answer his question in any way. Nor does that matter for this topic at all.

OP: If you put 4.10's in your car it will break the tires loose easier. If you are already burning the tires off, a new ratio isn't going to help you any. If you play around on the street and do roll racing the gears are going to give you a better advantage (assuming you aren't burning out from a roll.)
Judging by the question the OP will most likely be paying some one to do the install, therefore costing around 3-400 for a install. He doesn't want to do any suspension or tires so will more than likely be spinning out of the hole, when these cars spin with no suspension and get wheel hop they break 10 bolts.

Op, unless you are cutting sub 2.0 60's then you really need tires, suspension and seat time.
Old 01-02-2011, 10:49 AM
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Originally Posted by MUSTANGBRKR02
Judging by the question the OP will most likely be paying some one to do the install, therefore costing around 3-400 for a install. He doesn't want to do any suspension or tires so will more than likely be spinning out of the hole, when these cars spin with no suspension and get wheel hop they break 10 bolts.

Op, unless you are cutting sub 2.0 60's then you really need tires, suspension and seat time.
That's still no excuse to guy a 9" The power he would lose through it alone on a stock car would make it slower.. at that point there would be no reason for any modification.
Old 01-02-2011, 03:53 PM
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Originally Posted by Ethan[ws6]
That's still no excuse to guy a 9" The power he would lose through it alone on a stock car would make it slower.. at that point there would be no reason for any modification.
There is really no excuse to put any money in a 10 bolt behind a stick. The small power loss, if any would be worth it for the increased reliability. The OP would probably lower his et's since he could actually launch the car hard.
Old 01-02-2011, 03:56 PM
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think bout suspension and tires first dude.
Old 01-02-2011, 04:41 PM
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Thanks guys!

I'll probably just keep my 3:42 for now since it's mostly a street car.
Old 01-02-2011, 07:20 PM
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Originally Posted by 98ws6blk
Thanks guys!

I'll probably just keep my 3:42 for now since it's mostly a street car.
4.10's in my car with stock power would just blow the tires off in 1st and 2nd gear. In first I would nail it and it would hit the rev limiter just spinning the tires. The 4.10 in a 7.5 is weak because the pinion gear is small.
Old 01-02-2011, 09:24 PM
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Originally Posted by 96lt4c4
4.10's in my car with stock power would just blow the tires off in 1st and 2nd gear. In first I would nail it and it would hit the rev limiter just spinning the tires. The 4.10 in a 7.5 is weak because the pinion gear is small.
yep... the amount of material between the teeth of a 3 42 thicker than the amount between a 4 10.. its only 7.5 inchs and to put more teeth on it.. means its gonna be weaker...

those tires of yours need to break loose alittle to relieve the stress on the dif.
if you put D/r's or slicks on it you better baby it out of the hole.
Old 01-02-2011, 11:10 PM
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Originally Posted by Kevin01Z28
There is really no excuse to put any money in a 10 bolt behind a stick. The small power loss, if any would be worth it for the increased reliability. The OP would probably lower his et's since he could actually launch the car hard.
Yes there is.. it's called lack of funds. If all you have is 200 bucks and you want to give the car a little kick, buy gears. 4.10's may be hard on the 10 bolt but you know what else is hard on it? Racing it. Even if it blows you can buy another 10 bolt for $100 used and drive the car with it. If you don't have the money to spend on the extra reinforcement, don't.. Simple as that.



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