3.42 or 3.73 ?
10-07-2010, 11:43 AM
#1
3.42 or 3.73 ? Well put the headers on the car with the duals and yeah it doesn't stick to the ground what so ever. So now its time for gears and DR's but Im not quite sure what gears to get. What would be better for for the ET's at the track with just a cold air intake and tune will probably get it dyno tuned after all this.
10-07-2010, 11:58 AM
#4
Village Troll 
iTrader: (2)
Assuming it's a '94 and up the popular gear to go with are 3.73's. If it were me I'd get it on a dyno, see what kind of power it made, go to: www.f-body.org/gears, do research regarding others who share the same power band as you and make a decision from there. The last thing you do when on the track is to go too far past your peak before crossing the traps.
10-07-2010, 12:56 PM
#7
Well put the headers on the car with the duals and yeah it doesn't stick to the ground what so ever. So now its time for gears and DR's but Im not quite sure what gears to get. What would be better for for the ET's at the track with just a cold air intake and tune will probably get it dyno tuned after all this.
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10-07-2010, 01:17 PM
#9
OP seriously though........I'd consider 3.90's we ran 3.42's in a bolt on A4 ls1 car went 13.0 @ 108 we went to 3.90's in it and ran 12.6 @ 111......car will LOVE gear espically with the stock cube motor and the weight of a stock car.....you really wanna wake it up toss a 32-3600 converter in it
as for peak power I wouldn't worry about crossing revving too high.....5700 in third gear with a 26" tire and 7 percent converter slippage (which is around what a 3600 would do) puts you around 107mph......the stock converter would allow a bit more.....you car will prob make peak with full exhaust and a tune around 5300
Last edited by quik95lt1; 10-07-2010 at 01:27 PM.
10-07-2010, 01:38 PM
#10
wow 3.90's helped that much thats pretty impressive. but I have Long tubes on the car with true dual set up it trapped at 102 last night with 2.3 60 times :/. what do you think it will see if i put a nice 3200 Stall and the 3.90 in there? ik it won't touch them LS1 numbers lol
10-07-2010, 01:43 PM
#11
wow 3.90's helped that much thats pretty impressive. but I have Long tubes on the car with true dual set up it trapped at 102 last night with 2.3 60 times :/. what do you think it will see if i put a nice 3200 Stall and the 3.90 in there? ik it won't touch them LS1 numbers lol
think thats quick? we wacked it with a 160shot and tuned it and went 11.87 @ 121 lol
10-07-2010, 01:57 PM
#13
and dont feel alone im the only lt1 up at the track i always go to too..........boy are them ls1 guys pissed when they pull up next to me though.......good ole lt1 gettin it done!!!!
10-07-2010, 02:02 PM
#14
haha yeah my buddy actually went with me last night for his first time his LT1 ran a 14.8 stock when mine was stock it ran a 14."0"8 so i guess I got a strong running car to start with lol but all them LS1 guys always come up to me asking me about it and telling me all these crazy times they run stock i sit there like -_- but hey within probably the next few weeks ill be running right past them!
10-07-2010, 02:20 PM
#15
haha yeah my buddy actually went with me last night for his first time his LT1 ran a 14.8 stock when mine was stock it ran a 14."0"8 so i guess I got a strong running car to start with lol but all them LS1 guys always come up to me asking me about it and telling me all these crazy times they run stock i sit there like -_- but hey within probably the next few weeks ill be running right past them!
10-07-2010, 03:08 PM
#17
It also depends on how much track time you see IMO as well. I chose 3.42's for my automatic because it's mainly a street car. 3.73's or 3.90's will considerably hurt your fuel economy, and if you've got loud exhaust it's gunna get annoying on the highway for sure.
Some people claim to gain 2 or 3 tenths with a gear swap (say 3.23 to a 3.90) the reality is it could happen, but more than likely there is other factors at play that resulted in the better times, not just the gears. Most people don't seem to notice that drastic of an increase.
I've talked to several A4 street car owners with 3.73's and a suprising number of them regret it.
Some people claim to gain 2 or 3 tenths with a gear swap (say 3.23 to a 3.90) the reality is it could happen, but more than likely there is other factors at play that resulted in the better times, not just the gears. Most people don't seem to notice that drastic of an increase.
I've talked to several A4 street car owners with 3.73's and a suprising number of them regret it.
10-07-2010, 05:40 PM
#19
Village Troll
iTrader: (2)
of course thats all that matters right?? lol
OP seriously though........I'd consider 3.90's we ran 3.42's in a bolt on A4 ls1 car went 13.0 @ 108 we went to 3.90's in it and ran 12.6 @ 111......car will LOVE gear espically with the stock cube motor and the weight of a stock car.....you really wanna wake it up toss a 32-3600 converter in it
as for peak power I wouldn't worry about crossing revving too high.....5700 in third gear with a 26" tire and 7 percent converter slippage (which is around what a 3600 would do) puts you around 107mph......the stock converter would allow a bit more.....you car will prob make peak with full exhaust and a tune around 5300
OP seriously though........I'd consider 3.90's we ran 3.42's in a bolt on A4 ls1 car went 13.0 @ 108 we went to 3.90's in it and ran 12.6 @ 111......car will LOVE gear espically with the stock cube motor and the weight of a stock car.....you really wanna wake it up toss a 32-3600 converter in it
as for peak power I wouldn't worry about crossing revving too high.....5700 in third gear with a 26" tire and 7 percent converter slippage (which is around what a 3600 would do) puts you around 107mph......the stock converter would allow a bit more.....you car will prob make peak with full exhaust and a tune around 5300
