Supercharged L99s, what are you doing for gears/ TC? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

HAMBO · 07-26-2016, 02:30 PM

Quote:

Originally Posted by Jeff_SS

OP, ask Ryne what he thinks. He knows your setup, he tuned it.

Thanks. I called CMS as well. Their suggestion was, all else equal, they usually use 3.45s on supercharged L99 builds, but that it wouldn't be worth spending the money to just swap from 3.27 to 3.45 alone - won't be a noticeable enough difference for the $. I believe they also said (if I remember correctly) you could go to a lower gear ratio than 3.45 with a supercharger (depending on how much power you are putting out - if lots more mods or running lots of boost then they wouldn't), or run a TC. Just depends on what feeling you want, so I came here to ask for peoples' experiences.

Gotta hand it to the CMS guys, easy money would have been to just do the work and slap on some mods I wouldn't feel. They care about customer satisfaction and giving good advice!

Jeff_SS · 07-26-2016, 07:20 PM

Quote:

Originally Posted by HAMBO

Thanks. I called CMS as well. Their suggestion was, all else equal, they usually use 3.45s on supercharged L99 builds, but that it wouldn't be worth spending the money to just swap from 3.27 to 3.45 alone - won't be a noticeable enough difference for the $. I believe they also said (if I remember correctly) you could go to a lower gear ratio than 3.45 with a supercharger (depending on how much power you are putting out - if lots more mods or running lots of boost then they wouldn't), or run a TC. Just depends on what feeling you want, so I came here to ask for peoples' experiences.

Gotta hand it to the CMS guys, easy money would have been to just do the work and slap on some mods I wouldn't feel. They care about customer satisfaction and giving good advice!

Okay cool. Solid advice.
And yeah, I agree about the customer satisfaction.

1KillerSS · 07-26-2016, 07:27 PM

No suspension or gears will help you without some proper tires. Get yourself some good Drag Radials. Start with that first. I also changed to a 323, but I'm a manual.

SSeniorMoment · 07-27-2016, 01:03 AM

Need to keep in mind trap speeds and motor rpms in 4th gear, 1.15:1. The 3.27 diff works out to about 3.78 and 3.45 works out to about 3.97 if 4th gear was 1:1.

Start getting into the low tens and you'll be trapping in the 130s. If I was to go to a 9", 3.45 would be about max, depending on engine rpm and tire diameter.

I've been advised to to stick with the 3.27s, good for dropping in a ZL1 assembly if necessary.

07-26-2016, 07:27 PM	#17
1KillerSS Too much is never enough! Drives: AGP TT SS [COTW] 4/20/15 Join Date: Feb 2014 Location: Toledo,OH Posts: 4,149 View My Garage	No suspension or gears will help you without some proper tires. Get yourself some good Drag Radials. Start with that first. I also changed to a 323, but I'm a manual. __________________ AGP TT kit, 54/57 Forged rotating assembly, Custom grind cam... Dual nozzle meth, ID850's, Livernois dual fuel pumps, ECS BAP, 25% UDP, 3 inch Magnaflow catback with X pipe, Mantic 9000 clutch, DSS 1000hp axles, DSS aluminum driveshaft, ZL1 rear end, solid subframe bushings, HE differential offset bushings, BMR Trailing arm, BMR toe rods, Lingenfelter LNC-2000,SJM Line Lock. 747 whp 714wtq *Build thread* http://www.camaro5.com/forums/showth...55#post8107855

07-27-2016, 01:03 AM	#18
SSeniorMoment Drives: 2010 2SS/RS LS3 A6 IOM Join Date: May 2013 Location: Arizona Posts: 1,192	Need to keep in mind trap speeds and motor rpms in 4th gear, 1.15:1. The 3.27 diff works out to about 3.78 and 3.45 works out to about 3.97 if 4th gear was 1:1. Start getting into the low tens and you'll be trapping in the 130s. If I was to go to a 9", 3.45 would be about max, depending on engine rpm and tire diameter. I've been advised to to stick with the 3.27s, good for dropping in a ZL1 assembly if necessary.