CNC heads vs more gear
CNC heads vs more gear Which would be more fun for a 100% street driven car? 3.90 gears with a cam in the 22x/23x range and stock 243 heads or a tsp stage 1 243 and same size cam with stock 3.42 gears for an m6 346 ls1? Both with the ls6 intake and 1 7/8 headers. I already have clean set of unmilled 243s with dual .660 springs. A gear swap and worked heads should be similar in price.
Correct an m6. I want the 4.10s but am worried about the strength vs the 3.9. But they should be pretty close right?
In a M6 car with 10 bolt 3.90 or 4.10 are both going to fragile compared to the same gears in a 8.8 or 9 inch etc. . My H&C M6 TA ran 4.10's for 125,000 + miles they never broke but sounded like a jet engine with whine when I got a new 8.8 rear end.
Get a good quality gear regardless of if they are 3.90's or 4.10's
Trending Topics
Yes
In a M6 car with 10 bolt 3.90 or 4.10 are both going to fragile compared to the same gears in a 8.8 or 9 inch etc. . My H&C M6 TA ran 4.10's for 125,000 + miles they never broke but sounded like a jet engine with whine when I got a new 8.8 rear end.
Get a good quality gear regardless of if they are 3.90's or 4.10's
In a M6 car with 10 bolt 3.90 or 4.10 are both going to fragile compared to the same gears in a 8.8 or 9 inch etc. . My H&C M6 TA ran 4.10's for 125,000 + miles they never broke but sounded like a jet engine with whine when I got a new 8.8 rear end.
Get a good quality gear regardless of if they are 3.90's or 4.10's
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Addict
Joined: Dec 2017
Posts: 2,181
Likes: 970
3.90 = 10 & 39, nominal pinion dia 1.955"
4.10 = 10 & 41, nominal pinion dia 1.860"
Any difference in strength is minimal at most. Still a pinion that's too tiny to stand up to real stress.
Regardless, I think more gear will give more fun than more heads, even if there's more risk of failure. Fun vs risk.
4.10 = 10 & 41, nominal pinion dia 1.860"
Any difference in strength is minimal at most. Still a pinion that's too tiny to stand up to real stress.
Regardless, I think more gear will give more fun than more heads, even if there's more risk of failure. Fun vs risk.
TECH Fanatic
Joined: Jan 2017
Posts: 1,758
Likes: 442
I'd advise not spending money on gears and saving for a 9" or a 12 bolt that will come with the gears you want. Then you can beat the trash out of it at every stop light and you will break the trans before the rear.
3.90 = 10 & 39, nominal pinion dia 1.955"
4.10 = 10 & 41, nominal pinion dia 1.860"
Any difference in strength is minimal at most. Still a pinion that's too tiny to stand up to real stress.
Regardless, I think more gear will give more fun than more heads, even if there's more risk of failure. Fun vs risk.
4.10 = 10 & 41, nominal pinion dia 1.860"
Any difference in strength is minimal at most. Still a pinion that's too tiny to stand up to real stress.
Regardless, I think more gear will give more fun than more heads, even if there's more risk of failure. Fun vs risk.
Makes sense but I am not putting as much into this car as I had once hoped and just want it to be more fun on the cheap for now. I was planning on a full out h/c/I build with an s60 just a little over a year ago but life happened and I'm not that serious about dropping so much coin in this car. I know the 10 bolt is weak and this may very well be money wasted but for now I'm good with it.
I think we used Motives but that was 18 years ago. There's an old Motive Gear box my garage my stock 3.42's were in. Any of the fine LS1Tech vendors should be able to tell you who has the best quality gears today.
I rolled into launching by slipping the clutch no dumps. Dumps will kill the 10 bolt quickly as mentioned.
Does you car has the stock clutch or aftermarket?
I think we used Motives but that was 18 years ago. There's an old Motive Gear box my garage my stock 3.42's were in. Any of the fine LS1Tech vendors should be able to tell you who has the best quality gears today.
I rolled into launching by slipping the clutch no dumps. Dumps will kill the 10 bolt quickly as mentioned.
Does you car has the stock clutch or aftermarket?
I rolled into launching by slipping the clutch no dumps. Dumps will kill the 10 bolt quickly as mentioned.
Does you car has the stock clutch or aftermarket?
Later a 9 inch is etc as other's mentioned is a nice upgrade.I eventually went with a Hawk's 8.8 and have been happy with it.
Originally Posted by RB04Av
3.90 = 10 & 39, nominal pinion dia 1.955"
4.10 = 10 & 41, nominal pinion dia 1.860"
Any difference in strength is minimal at most. Still a pinion that's too tiny to stand up to real stress.
Regardless, I think more gear will give more fun than more heads, even if there's more risk of failure. Fun vs risk.
4.10 = 10 & 41, nominal pinion dia 1.860"
Any difference in strength is minimal at most. Still a pinion that's too tiny to stand up to real stress.
Regardless, I think more gear will give more fun than more heads, even if there's more risk of failure. Fun vs risk.