3.90 or 4.10? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Hylton · 03-25-2009, 03:13 PM

Anyone know what the "sweet spot" rpm range is for the LS3?

SS 376 · 03-25-2009, 03:14 PM

Quote:

Originally Posted by CamaroSpike23

4.10s. 6 gears on this thing. top end and overdrive will not be compromised

I'm going with 4.10. 4.10 gears should be fine, given how super-long (that's what she said) 6th gear is. Hell, I think even 4.33 might workable. My primary concern is more about gear whine than highway fuel economy.

Crowley · 03-25-2009, 03:18 PM

Quote:

Originally Posted by Can-Am

I'm going with 4.10. 4.10 gears should be fine, given how super-long (that's what she said) 6th gear is. Hell, I think even 4.33 might workable. My primary concern is more about gear whine than highway fuel economy.

That is true .. I was always worried about that with my 4.10s and 98 cobra ... luckly I never had any whine from them .. on another note ... those of us who may be looking at some roots style blower may be interested in how a gear change will affect the first couple of gears as well .. need to keep traction .. lol

Crowley

Gary B · 03-25-2009, 06:44 PM

4:10's all the way! Its a heavy car, got to get it moving!! 4:10's in my 95 was awesome! I still got over 20mpg on the highway.

vega$ · 03-25-2009, 07:26 PM

Quote:

Originally Posted by CamaroSpike23

4.10s. 6 gears on this thing. top end and overdrive will not be compromised

Exactly what I was thinking.. IMO our only set back is the stock gear and with either one I think we can achieve better times than the GXP.

THE EVIL TW1N · 03-25-2009, 09:40 PM

Quote:

Originally Posted by Gary B

4:10's all the way! Its a heavy car, got to get it moving!! 4:10's in my 95 was awesome! I still got over 20mpg on the highway.

because of the rear tire size, putting 4.10's on the 5th gen will feel like the equivalent of installing 3.73's in the 95 (and, actually, considering how much higher the LS3 revs vs. the LT1, it's worse than 3.73's in relative performance gain).

JJ#48Racing · 03-26-2009, 10:37 AM

Quote:

Originally Posted by vega$

Whos gonna do what?
I'm kind of stuck in between..
3.90 for a daily driver?? or would 4.10 be fine?

Not to be a debbie downer here, but will 4.10's fit in this car? I thought the G8 can only fit up to 3.90's?

Quote:

Originally Posted by Can-Am

I'm going with 4.10. 4.10 gears should be fine, given how super-long (that's what she said) 6th gear is. Hell, I think even 4.33 might workable. My primary concern is more about gear whine than highway fuel economy.

I have 3.73's in my 4th gen and I get some whine right at 65mph. It's a little annoying, but my exhaust loud enough that it doesn't matter much.

Muscle Master · 03-26-2009, 11:27 AM

do note that you guys will be sacrificing mileage out the ass

Personally I would do 3.92

Hylton · 03-26-2009, 11:38 AM

Quote:

Originally Posted by Muscle Master

do note that you guys will be sacrificing mileage out the ass

Personally I would do 3.92

Not really. How often would you need to be in 6th gear with the stock gear ratio? Almost never!

UsedTaHaveA68 · 03-26-2009, 11:39 AM

Quote:

Originally Posted by THE EVIL TW1N

it shouldn't need bumping of the rev limiter at the track. There is enough room in 3rd to finish the 1/4 without shifting into 4th. 3rd should be good enough for ~114 mph based on some other calculators.

The calculator that the OP used has a conversion factor of .965 for the tire height. Meaning whatever the tire height is calculated out to be, it multiplies that times .965, which makes the height used in the calculations shorter. It does this to account for various factors such as the weight of the car deforming the tire slightly, which makes the actual height shorter. This calculator will probably provide you a more accurate answer than others that do not use this conversion factor. Notice this one says your top speed in 3rd is 110.1 mph. Also notice how every single test so far has put the trap speed in the 1/4 at 110-111. I've never seen so many tests on one car with such close numbers. I'm assuming that's because at about 111, the rev limiter kicks in, and the testers are running it straight to the limiter to avoid shifting into 4th, which would make the 1/4 times slower. So yeah, raisng the rev limiter to about 6900 would probably net you some faster times/higher trap speeds.

GeorgeInNePa · 03-26-2009, 11:50 AM

Guys/gals, where are you going to get 4.10s for the factory rear?

*CamaroSpike23* · 03-26-2009, 11:57 AM

Quote:

Originally Posted by GeorgeInNePa

Guys/gals, where are you going to get 4.10s for the factory rear?

aftermarket.

GeorgeInNePa · 03-26-2009, 12:20 PM

Quote:

Originally Posted by CamaroSpike23

aftermarket.

Ok, that's what I thought you'd say.

I am 99.9% sure that the Camaro rear is the same as the G8 rear. If that is so, there is NO aftermarket ring and pinion out there. Not in the US and not in Aus.

Your choices are 2.92, 3.27, 3.45, 3.70 and that's it. For now.

ZZcamaro · 03-26-2009, 12:56 PM

I would use 3.90s if somebody could tell me where the heck to find the right ones to install in the Camaro!!!!

03-25-2009, 03:13 PM	#15
Hylton Drives: fanboys and ass kissers crazy. Join Date: May 2008 Location: Ottawa, Ontario Posts: 7,280	Anyone know what the "sweet spot" rpm range is for the LS3? __________________ "BBOMG - More than just a car show.... It's an experience!"

03-25-2009, 06:44 PM	#18
Gary B Drives: Subaru Join Date: Oct 2008 Location: Ct. Posts: 573	4:10's all the way! Its a heavy car, got to get it moving!! 4:10's in my 95 was awesome! I still got over 20mpg on the highway. __________________ Time for a new ride soon....6th Gen or 5th Gen Z28? Hmmm....

03-26-2009, 11:50 AM	#25
GeorgeInNePa Plastic Cuttin' Badass Drives: '08 G8GT 6.0 Join Date: Mar 2009 Location: Clarks Summit, Pa., USA Posts: 69	Guys/gals, where are you going to get 4.10s for the factory rear? __________________ '08 Black on Black G8GT--> 12.166 @ 113.13, 1.723-60'<-before the gears... FasterProms Tune, Ported TB/Intake - HSRK - Vararam - SLP 25% UD Pulley - ARH 1 3/4" Longtubes - Pypes Violators - Yank 3200 Converter - PCM4Less Trans Cooler - DashHawk - All Pedders Bushings, Xa Coil-Overs - Spohn Arms - Billet Prototypes Catch Can - Skinnies on GTO rims - ET Streets on F Body Rims - SJM LineLoc - 3.70gears/Harrop TrueTrac Coming Soon: Ported Heads/Cam/DoD Delete

03-26-2009, 12:56 PM	#28
ZZcamaro Drives: 2SS w/ ZZ427 Package!! Join Date: Oct 2008 Location: Pittsburgh, PA Posts: 2,700	I would use 3.90s if somebody could tell me where the heck to find the right ones to install in the Camaro!!!!