[Z06] Is Cryogenic processing worth the $?
Thread Starter
Racer
Joined: Oct 2007
Posts: 292
Likes: 4
From: Springfield IL
Is Cryogenic processing worth the $?
Hello everyone!Im thinking about buying an RPM diff.I have two questions
1- Is cryogenic processing worth the money?
2- What gear would you run for a 500 rwhp 500 rwtq C5Z?
I will be Autocrossing,Road course racing,street driving and a little drag racing.
1- Is cryogenic processing worth the money?
2- What gear would you run for a 500 rwhp 500 rwtq C5Z?
I will be Autocrossing,Road course racing,street driving and a little drag racing.
Race Director
Joined: May 2004
Posts: 15,866
Likes: 196
From: PA
I dont hear of that many people breaking the actual gear set in c5z's much, seems that the housing, trans output shaft or half shafts are more likely to fail first. If you are primarily road racing why would you change from 3.42's? Seems with all that power your making you would be fine to stay with them. Plus, the factory 3.42's were shot peened for added strength anyway.
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Last edited by MY03C5Z; May 21, 2016 at 02:52 PM.
Thread Starter
Racer
Joined: Oct 2007
Posts: 292
Likes: 4
From: Springfield IL
I dont hear of that many people breaking the actual gear set in c5z's much, seems that the housing, trans output shaft or half shafts are more likely to fail first. If you are primarily road racing why would you change from 3.42's? Seems with all that power your making you would be fine to stay with them. Plus, the factory 3.42's were shot peened for added strength anyway.
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Im not even sure whats wrong inside other than some shiny shratnel in the oil and clunking and catching sensation like its binding up when i turn
Melting Slicks
Joined: Aug 2004
Posts: 3,003
Likes: 89
From: Indy IN
Going to 3:90's is fine for drag racing, but they would be terrible for autocross.
With the 3:42's you end up "kissing" the rev limiter in second, but seldom do you need third gear. If you drop down to the shorter gear you're going to be caught between second and third in several places on lots of courses. Yes, you'll come off of corners with more grunt, but the reality is that you can't plant the pedal coming off of corners with the 3:42 in second without the back end stepping out anyway. Shorter gears would be a waste since you won't go any faster since you'll still be feathering the throttle, and you'll be shifting a lot more, and I'm assuming that you'd be running DOT slicks like Hoosiers. If you're running 200 TW tires you most certainly don't want or need a shorter set of gears.
Put your time and money into setup and handling and seat time and don't bother with the engine or gears for autocross.
With the 3:42's you end up "kissing" the rev limiter in second, but seldom do you need third gear. If you drop down to the shorter gear you're going to be caught between second and third in several places on lots of courses. Yes, you'll come off of corners with more grunt, but the reality is that you can't plant the pedal coming off of corners with the 3:42 in second without the back end stepping out anyway. Shorter gears would be a waste since you won't go any faster since you'll still be feathering the throttle, and you'll be shifting a lot more, and I'm assuming that you'd be running DOT slicks like Hoosiers. If you're running 200 TW tires you most certainly don't want or need a shorter set of gears.
Put your time and money into setup and handling and seat time and don't bother with the engine or gears for autocross.
Last edited by Solofast; May 22, 2016 at 10:53 AM.
Le Mans Master
Joined: Nov 2005
Posts: 5,403
Likes: 31
From: Allentown PA & Elk Twp NJ HPDE Addict
Going to 3:90's is fine for drag racing, but they would be terrible for autocross.
With the 3:42's you end up "kissing" the rev limiter in second, but seldom do you need third gear. If you drop down to the shorter gear you're going to be caught between second and third in several places on lots of courses. Yes, you'll come off of corners with more grunt, but the reality is that you can't plant the pedal coming off of corners with the 3:42 in second without the back end stepping out anyway. Shorter gears would be a waste since you won't go any faster since you'll still be feathering the throttle, and you'll be shifting a lot more, and I'm assuming that you'd be running DOT slicks like Hoosiers. If you're running 200 TW tires you most certainly don't want or need a shorter set of gears.
Put your time and money into setup and handling and seat time and don't bother with the engine or gears for autocross.
With the 3:42's you end up "kissing" the rev limiter in second, but seldom do you need third gear. If you drop down to the shorter gear you're going to be caught between second and third in several places on lots of courses. Yes, you'll come off of corners with more grunt, but the reality is that you can't plant the pedal coming off of corners with the 3:42 in second without the back end stepping out anyway. Shorter gears would be a waste since you won't go any faster since you'll still be feathering the throttle, and you'll be shifting a lot more, and I'm assuming that you'd be running DOT slicks like Hoosiers. If you're running 200 TW tires you most certainly don't want or need a shorter set of gears.
Put your time and money into setup and handling and seat time and don't bother with the engine or gears for autocross.
If autocross and HPDEs will be your primary focus, 3.42s will be the best fit.
