Pontiac GTO 2004-2006 - a4 with 3.91s top speed?
01-27-2012, 08:00 AM
Idea of what my top speed would be with stock size tires and 3.91s in my a4 would be?
01-27-2012, 08:15 AM
how high are you revving to
01-27-2012, 08:17 AM
6 ish...Prolly 6500
01-27-2012, 08:18 AM
Let's say 6 for now
01-27-2012, 10:24 AM
You'll be limited by wind resistance before you hit the theoretical top speed. I see you're also looking at drive shafts and they have theoretical top critical rotation speeds too.
01-27-2012, 11:13 AM
Yeah I was just looking.for a number where id run. Out of gear Prolly.gonna do some high way runs just seeing what gears im gonna go with Prolly.gonna be 3.73s
01-27-2012, 11:26 AM
both in 4th
01-27-2012, 04:04 PM
Those numbers with stock tire size?
01-27-2012, 10:50 PM
Stock tires are 26" correct?
01-27-2012, 11:32 PM
hi try this link!!!!26 inch tyre!!!! rpm!! diff ratio 3.9 or 3.7 !!!! trans gear which is 1to1 in 3rd and as far as i know 0.70 to 1 in 4th in a 4l60e!!! as said wind resistance etc etc come into play way before you will hit top speed!!!! but will give you an idea of freeway rpm etc !!!!cheers
01-28-2012, 10:38 AM
I would think that a stock rear gear would net you better high speeds
01-28-2012, 10:42 AM
with my last GTO I really wanted to run the texas mile just to see if it would get close to 200 mph with nitrous it was 578 rwhp n/a 409 rwhp stock rear gears a4
01-28-2012, 04:24 PM
A4 + 3.91's FTW!!!! 184mph seems plenty fast to me :)
01-29-2012, 01:31 PM
Why would you get 373s?
01-29-2012, 09:27 PM
I was just doing some thinking...any idea who sells built rears for these?
I want a gear like that bc...heres the scoop 418 stroker kit in the mail....brand new nitrous kit in the garage waiting...shooting for 700 to the tire...on the bottle
01-29-2012, 09:29 PM
its got a built stage 3 4 l60e and a yank ss 3600 trans
01-29-2012, 10:25 PM
You will want to hit your goal in 3rd not OD or run a 28inch tire.
01-30-2012, 11:44 AM
I dc about quarter mile its Prolly gonna be a high way car
01-30-2012, 03:06 PM
Shifting into OD @ WOT can't be done very many times, even in a built auto.
01-31-2012, 07:22 AM
both in 4th
Really hope noone is taking their 4th gear to 6000+ cuz that transmission ain't lasting long.
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