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

HAMBO · 07-25-2016, 12:58 PM

Curious what other supercharged L99s are doing as far as transmission mods go. Finding the stock 3.27s to be a bit weak and lacking in responsiveness.

Lots of posts saying 3.45 is ideal for SC L99, but also plenty of people saying that change on its own isn't worth the $.

Anyone have good/bad experiences based on what they are running (either different gears or a stall converter)?

Thanks!

Stubbsy · 07-25-2016, 03:25 PM

Quote:

Originally Posted by HAMBO

Curious what other supercharged L99s are doing as far as transmission mods go. Finding the stock 3.27s to be a bit weak and lacking in responsiveness.

Lots of posts saying 3.45 is ideal for SC L99, but also plenty of people saying that change on its own isn't worth the $.

Anyone have good/bad experiences based on what they are running (either different gears or a stall converter)?

Thanks!

I have enough trouble getting traction with the stock gears, I would not consider using lower ratio gears until I do some rear suspension mods to get the power down.

HAMBO · 07-25-2016, 03:41 PM

Quote:

Originally Posted by Stubbsy

I have enough trouble getting traction with the stock gears, I would not consider using lower ratio gears until I do some rear suspension mods to get the power down.

Ya, I checked out your build and agree. You are definitely putting out more power than me, and even I was having trouble getting grip with the stock suspension after adding the SC.

Upgraded my suspension and am not having the same trouble with traction anymore. Don't plan to add much more hp for the time being (daily driver, CA smog laws) so looking at transmission now.

hammdo · 07-25-2016, 05:43 PM

Quote:

Originally Posted by HAMBO

Curious what other supercharged L99s are doing as far as transmission mods go. Finding the stock 3.27s to be a bit weak and lacking in responsiveness.

Lots of posts saying 3.45 is ideal for SC L99, but also plenty of people saying that change on its own isn't worth the $.

Anyone have good/bad experiences based on what they are running (either different gears or a stall converter)?

Thanks!

Went from 3.27 to 3.91 to 3.45. 3.45s still goose the wheels, but much better than 3.91s. ADM recommended the 3.45s. Good response from my end...

I have a ton of suspension mods, no torque converter...

Did not try 3.73s.

-Don

Dmpsix · 07-25-2016, 05:56 PM

Hammdo vs. Hambo

rip in peace

Scuzz · 07-25-2016, 06:13 PM

3.45 for gears on the supercharged auto

hammdo · 07-25-2016, 06:23 PM

Quote:

Originally Posted by Dmpsix

Hammdo vs. Hambo

rip in peace

LOL

-Don

HAMBO · 07-25-2016, 07:55 PM

Quote:

Originally Posted by hammdo

Went from 3.27 to 3.91 to 3.45. 3.45s still goose the wheels, but much better than 3.91s. ADM recommended the 3.45s. Good response from my end...

I have a ton of suspension mods, no torque converter...

Did not try 3.73s.

-Don

Thanks Hammdo - so 3.91 was really too much? Your build is awesome, but probably putting way more power than mine. Did you have all the mods you have now when you ran 3.91?

hammdo · 07-25-2016, 08:13 PM

Some suspension updates after that, cooling etc. power mods were already there. Tuned a bit but no additional power upgrades.

A6 with the 3.91s just spun. I don't think the Drag radial would have helped much at all. Ryan at GPI tried it and he said the same thing, 2nd gear was a waste. I am right at 600 RWHP now but even at 565, 3.91s were still too much.

Like I said, didn't try the 3.73s, but the 3.45s seem a good compromise for the A6 with FI... Andy at ADM and Ryan from GPI felt the 3.45s for an A6 FI setup is just right, and I trust their opinion...

I did also do the posi mod when we did the 3.45s

-Don

SS PANTHER · 07-26-2016, 04:23 AM

Hambo, you're welcome to drive my car in street and highway situations to get a comparative feel. You've been in my car with the 3.70's and know how it accelerates. I think you would really like the low end response around town, on the road course coming out of corners and passing someone on the highway. It may help your city mileage also. Let me know.

HAMBO · 07-26-2016, 10:42 AM

Quote:

Originally Posted by SS PANTHER

Hambo, you're welcome to drive my car in street and highway situations to get a comparative feel. You've been in my car with the 3.70's and know how it accelerates. I think you would really like the low end response around town, on the road course coming out of corners and passing someone on the highway. It may help your city mileage also. Let me know.

Thanks SS PANTHER! I thought your car drove great, and am really considering the 3.7s as a result. The kick was just great. Sounds like you haven't had any issues at all with those gears?

SS PANTHER · 07-26-2016, 11:24 AM

I have had them for 15 months and no problems. Even with the lower profile 285's, all the bolt ons and supercharger I get 22mph highway. Let's try and hook up within the next month.

1985airborne · 07-26-2016, 01:15 PM

I have 3.45 and hook on the street but on the track with Nitto 555 Im spinning like crazy!

Jeff_SS · 07-26-2016, 02:19 PM

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

07-25-2016, 12:58 PM	#1
HAMBO Drives: Supercharged 2013 AGM 2SS/RS Join Date: Oct 2013 Location: Los Angeles, CA Posts: 786	Supercharged L99s, what are you doing for gears/ TC? Curious what other supercharged L99s are doing as far as transmission mods go. Finding the stock 3.27s to be a bit weak and lacking in responsiveness. Lots of posts saying 3.45 is ideal for SC L99, but also plenty of people saying that change on its own isn't worth the $. Anyone have good/bad experiences based on what they are running (either different gears or a stall converter)? Thanks! __________________ 2013 AGM 2SS/RS SLP TVS2300, Edge CAI, 3" Magnaflow catback, BC Racing BR series coilovers, HRE FF15's (20x10 square) with Michelin Pilot Sport 4S's, GM STB, BMR front and rear sway bars and toe links, Prothane subframe bushings and front control arm inserts, JDP rear upper control arm bushings, Elite Engineering catch can. Tuned by Cunningham Motorsports. 1967 Bolero Red 396 SS/RS Convertible

07-25-2016, 06:13 PM	#6
Scuzz Drives: 2012 Camaro SS Join Date: Aug 2013 Location: Mckinney, TX Posts: 347 View My Garage	3.45 for gears on the supercharged auto __________________ 2012 Camaro SS Automatic AGP Twin Turbo LSX427 / ADM Magic / 4L80 “1360 Rwhp 1225 Rwtq 25 lbs of boost”

07-25-2016, 08:13 PM	#9
hammdo 'It's an experiment' Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014 Location: Dallas TX Posts: 8,694 View My Garage	Some suspension updates after that, cooling etc. power mods were already there. Tuned a bit but no additional power upgrades. A6 with the 3.91s just spun. I don't think the Drag radial would have helped much at all. Ryan at GPI tried it and he said the same thing, 2nd gear was a waste. I am right at 600 RWHP now but even at 565, 3.91s were still too much. Like I said, didn't try the 3.73s, but the 3.45s seem a good compromise for the A6 with FI... Andy at ADM and Ryan from GPI felt the 3.45s for an A6 FI setup is just right, and I trust their opinion... I did also do the posi mod when we did the 3.45s -Don __________________ 747 RWHP 794 RWTQ "Horsepower sells cars, torque wins races." - Enzo Ferrari See My Build: http://www.camaro5.com/forums/showthread.php?t=385577 Last edited by hammdo; 07-25-2016 at 08:25 PM.

07-26-2016, 01:15 PM	#13
1985airborne One Slow Automatic Drives: 2017 GS 2010 CAMARO SS Join Date: Mar 2010 Location: NC NJ NY DMV THE BAYAREA Posts: 877	I have 3.45 and hook on the street but on the track with Nitto 555 Im spinning like crazy! __________________ 650HP 2010 CAMARO SS 710HP 2017 GRAND SPORT

07-26-2016, 02:19 PM	#14
Jeff_SS "Cam Only" Drives: 2013 Camaro SS Join Date: Nov 2011 Location: Scottsdale, AZ Posts: 1,709 View My Garage	OP, ask Ryne what he thinks. He knows your setup, he tuned it. __________________ 2013 AGM Camaro 2SS/RS M6 \| LSA Blower, 2.5" pulley, 10% lower, FIC1000's, Fore Innovations Twin Pump fuel system w/ Flex Fuel, CMS Custom Grind Cam, Kooks 1 7/8" headers w/ catless off-road pipes, NPP Exhaust, 3.91's, JLT ZL1 Intake, Prospeed Heat Exchanger \| Pfadt Suspension, 1LE Sway Bars \| DSS 1000hp axles \| Tuned by Ryne @ CMS E85: 734rwhp/636rwtq (mustang dyno)

07-25-2016, 05:56 PM	#5
Dmpsix Drives: Black L99 2SS/RS Join Date: Mar 2014 Location: San Antonio, TX Posts: 1,862	Hammdo vs. Hambo rip in peace

07-26-2016, 04:23 AM	#10
SS PANTHER Drives: 2013 SS Supercharged Convertible Join Date: May 2013 Location: SoCal Posts: 2,714	Hambo, you're welcome to drive my car in street and highway situations to get a comparative feel. You've been in my car with the 3.70's and know how it accelerates. I think you would really like the low end response around town, on the road course coming out of corners and passing someone on the highway. It may help your city mileage also. Let me know.

07-26-2016, 11:24 AM	#12
SS PANTHER Drives: 2013 SS Supercharged Convertible Join Date: May 2013 Location: SoCal Posts: 2,714	I have had them for 15 months and no problems. Even with the lower profile 285's, all the bolt ons and supercharger I get 22mph highway. Let's try and hook up within the next month.