Performance Bang for the Buck
Drifting
Joined: Apr 2008
Posts: 1,316
Likes: 2
From: St. Louis Mo
If he was going to go to 3.42 gears and he has 3.15- don t you think the money would be better spent on something else than that small increase in acceleration that 3.42 s give. And i didn t say not to "Build his drivetrain", that s a given, Cocky! Not everyone wants to run 9s and run out of gear at 1320 ft.!(as i assume you do)
Le Mans Master
Joined: Feb 2004
Posts: 8,629
Likes: 16
From: York PA
I never said the op should go with 3:42's. Yes I agree going from 3:15's to 3:42's aren't worth it. But staying with 3:15's isn't going to help the op reach his goal of running in the 11's without a power adder.
Hit a soft spot. Chill fellow Corvette bro. 
Hit a soft spot. Chill fellow Corvette bro.
Thread Starter
Instructor
Joined: Jan 2008
Posts: 159
Likes: 0
From: Yonkers New York
Correct, I wouldn't spend money going to 3.42's. My initial question was going for 4.11 gears. Arguments against that include my short tires, running out of revs in third and shifting up to fourth on nitrous, and getting the car to launch in its power band. I agree I'll leave the 3.15 alone and go for a better converter. See how the car hooks and goes, then try a small 100-150 shot to get it into the 10's.
Burning Brakes
Joined: Jan 2004
Posts: 1,158
Likes: 6
From: Winter Springs Fla
I picked up 7/10th by going to a 3.42/3200 over the stock converter and the 3.15 gear and still get great drivability with the car .
When i spray the car with a 150 off the line, the converter flashes to 35-3600 rpms and it runs out at 6600 rpm in 3rd at 10.50@134 .
If you can find a good 3.42 chunk to put in with the bigger stall i would because it really makes the car come alive around town and off the line .
When i spray the car with a 150 off the line, the converter flashes to 35-3600 rpms and it runs out at 6600 rpm in 3rd at 10.50@134 .
If you can find a good 3.42 chunk to put in with the bigger stall i would because it really makes the car come alive around town and off the line .
Drifting
Joined: Apr 2008
Posts: 1,316
Likes: 2
From: St. Louis Mo
Yeah, it ll no longer be a soft spot after i take it to the track..the first day i finished my forged 427/Spec clutch/new tranny& diff install, i was so excited that i literally floored it within the first 20ft!! Needless to say, the dyno showed a slipping clutch and it has only gotten so bad that i couldn t hardly climb a hill on the highway without it "downshifting"(its a 6spd), especially in higher gears. Well i just installed a new clutch a couple of days ago and AFTER i break in this clutch ill dyno-tune it and then get it ready for the track. I already have skinnys for the front and Mickeys for the back.....And i ran the line for my nitrous bottle. So, i hope around 800rwhp(estimated-600na+200nitrs) will get me down the track pretty fast. My only real thing that i HAD to do was install 3.15s+DTE brace, cause i like topend brawls the best! 4DRush- You re the man on 1/4 mile, i have no arguments here! Nevermind my Bipolar outbursts!! (its like having Turrets syndrome) Peace-Jason 
(its a 6spd), especially in higher gears. Well i just installed a new clutch a couple of days ago and AFTER i break in this clutch ill dyno-tune it and then get it ready for the track. I already have skinnys for the front and Mickeys for the back.....And i ran the line for my nitrous bottle. So, i hope around 800rwhp(estimated-600na+200nitrs) will get me down the track pretty fast. My only real thing that i HAD to do was install 3.15s+DTE brace, cause i like topend brawls the best! 4DRush- You re the man on 1/4 mile, i have no arguments here! Nevermind my Bipolar outbursts!! (its like having Turrets syndrome) Peace-Jason
Burning Brakes
Joined: Jan 2004
Posts: 1,158
Likes: 6
From: Winter Springs Fla
I will probley get a 315 gear next time i need to freashen up the tranny .
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Team Owner
Joined: May 2005
Posts: 23,682
Likes: 9
From: Flagstaff Az.
I don't know if you have looked, but the tranny and converter come down with the diff. Labor to change the converter and new fluid run $100 or less with the drive train dropped. By the way, your 3:15s are worth about what you would pay for a set of used 3:42s which will be a low enough gear unless you plan on mostly drag racing your car.
