It's amazing how the first three gears of a 6L80 come close to a Turbo400 with a 4.56 rear.

6L80
4.03 x 2.92 = 11.76
2.36 x 2.92 = 6.89
1.53 x 2.92 = 4.46

Turbo400
2.48 x 4.56 = 11.30
1.48 x 4.56 = 6.74
1.00 x 4.56 = 4.56

No wonder this car launches so hard even with a relatively high 2.92 ratio...

Just imagine what it would launch like, if TQ management was turned off....

Try this excel sheet I put together for some gear ratio (and tire size) fun.

http://alucinari.net/g8/G8_Tire_and_Gear_Calculator.xls

No wonder where topping out in 3rd by the quarter ...wow..
I had 4.11s on with a Munice 4sp in 70 half camero...I think top speed in 4th was like 120

This is very good info !

See us guys from Texas are pretty sharp. Thanks jsalbre. Charlie

Lol ! But you're from NY !

Yeah I know, and the Astros fans dont appreciate all my Yankees shirts either. I dont say yall (too much). Its HOT as hell here too. It is a good thing Im not up there. We would all be broke! Ray, George and myself having state to state shoot outs could be costly......But I would do it! :driving:

Does anyone ofer gearing for these cars? I am thinking something just a touch steeper (2.7ish) would be called

Does anyone ofer gearing for these cars? I am thinking something just a touch steeper (2.7ish) would be called

I'm sure someone does...that's what's in the GXP.

Just imagine what it would launch like, if TQ management was turned off....

You crack my **** up... Every time some one comments on power you throw that out...

Really find it funny! Keep it up! :)

Chris

:slap::slap::slap::slap::slap::slap:

No problem guys! It's not 100% my work though. A few pieces and parts were pulled from a couple excel sheets I found when looking at Mustangs. It did take a bit of work to get the 6 speed tranny in there, and the switch from 5 to 6 gears on one of the pages.

I'd give credit to the place I found them or the original designers, but I've slept since then and can't rememeber for the life of me.

Either way, it's a lot of fun to play with! Who said you'd never use that math you learned in school?

the GXP has steeper geari than the GT?

the GXP has steeper geari than the GT?

Something like 3.23, IIRC.

Yeah I know, and the Astros fans dont appreciate all my Yankees shirts either. I dont say yall (too much). Its HOT as hell here too. It is a good thing Im not up there. We would all be broke! Ray, George and myself having state to state shoot outs could be costly......But I would do it! :driving:

:wink2:

would 3.73 not be a good choice? of course if someone has them

would 3.73 not be a good choice? of course if someone has them

3.73's are good if you really want to jump off the line, but the top end is not so great. Most stangs use the 3.73 gears or swap to them, id go 3.23 jmo.

If we were talking about mustangs that would be one thing, but with the G8 why change gears? I've seen where the modded guys are claiming 4.5 and below to 60. That's damn quick, especially for a 4,000lb car. If you put something like 3:73 for example, you're probably just going to be fighting for traction.

GXP will have a 3.27 and a 3.70. Should be nice combos.

You would be better off changing torque convertor and keep stock gearing. You would always be able to get into the power band quicker in any gear.

what torque convertor would you recommend? i was also having problem with car going into
4th gear at trap. i will definantly try the shift technique