Pontiac GTO 2004-2006 - how much to gain with just a simple gear change!!




Fastdriver1992
11-23-2010, 07:56 PM
how much u think to gain in the 1/4 mile from upgrading the gears to a 4.10's with a stock m6 with bolt ons ?


sfuller442
11-23-2010, 08:02 PM
think the steepest they go is 3.90's, not much of a selection out there

baalic
11-23-2010, 08:18 PM
@sfuller WTF ??? You can get 4.10s and alMost any other combo you want...?!

@ fastdriver. It depends if your getting traction, I would guess around .5 depending on your total setup..


sfuller442
11-23-2010, 08:31 PM
for real? since when? i haven't had much luck finding gears for gto rear ends

baalic
11-23-2010, 08:32 PM
All about money lol

baalic
11-23-2010, 08:39 PM
All about money lol

20 second search.

http://www.ls1gto.com/forums/showthread.php?t=5170

theone61636
11-23-2010, 08:53 PM
I put 4.10's in my GTO back in the summer time along with new axles, stubs, clutch and driveshaft. Otherwise, I'm stock. The gears didn't even come CLOSE to living up to the hype that they've been given. The car definitely has more pick up and go in 4th, 5th and 6th gears, but I don't feel much of a difference at all in the first 3 gears.

Granted I never ran it at the track so i can't give you time differences, but for your car, you might see a few tenths depending on the cam you're running and its powerband.

sfuller442
11-23-2010, 08:57 PM
you got me lol, still outta my price range

danieloneil01
11-24-2010, 09:20 AM
Gears for the gto aint cheap.

Fastdriver, it's suspension. :)

Fastdriver1992
11-25-2010, 07:24 PM
yeah there rediculously expensive. its my friends goat 6 speed with a 230/236 .540/.540 110lsa and ls6 243 heads with bolt ons. he's hoping to run low 12's after the 4.10's

does this sound feasible?

66tomcat
11-27-2010, 06:46 AM
with bolt ons he should already be in the 12s .
im an auto with bolt ons ,and im in the mid 11s 11.60 with the stock gears
11.52 with the 3.91 gears.

Fastdriver1992
11-27-2010, 09:16 PM
with bolt ons he should already be in the 12s .
im an auto with bolt ons ,and im in the mid 11s 11.60 with the stock gears
11.52 with the 3.91 gears.

but do u have the 6.0 or the 5.7? my friend has the 5.7

ULTIMATEORANGESS
11-27-2010, 09:48 PM
yeah there rediculously expensive. its my friends goat 6 speed with a 230/236 .540/.540 110lsa and ls6 243 heads with bolt ons. he's hoping to run low 12's after the 4.10's

does this sound feasible?

i would think 11s with traction.

LS2-TOY
11-28-2010, 12:16 AM
i would think 11s with traction.

I 2nd this. In a LS2 with cam, should be high 11's with a good 60' and traction.

svede1212
11-29-2010, 01:01 PM
I agree that with bolt ons he should already be in the 12s with a 5.7. With just headers I was 12.9x. That would mean the diver mod would be most beneficial. He'd probably lose tenths. I have 3.91s on my 5.7 now and gears made it harder to launch not easier. On the street they're fun on a roll but at the track traction is a problem

Fastdriver1992
11-29-2010, 02:56 PM
I agree that with bolt ons he should already be in the 12s with a 5.7. With just headers I was 12.9x. That would mean the diver mod would be most beneficial. He'd probably lose tenths. I have 3.91s on my 5.7 now and gears made it harder to launch not easier. On the street they're fun on a roll but at the track traction is a problem

car has pacesetter headers 1 3/4 long tubes not cats and loudmouth 2 mufflers. there is no restriction. looking at 4.10's with the mph he will be turning. i have an estimate. guessing at 400rwhp he should be going approximatly 115-119mph at best so here are the numbers and let me know what u think

http://i807.photobucket.com/albums/yy351/fastdriver1992/gtoaccelerationcalculator.png

http://i807.photobucket.com/albums/yy351/fastdriver1992/speedgto.png

svede1212
11-29-2010, 03:30 PM
RPM-wise he'd be fine but I'll bet his 60 goes higher as well as his ET and he'll be fighting wheel hop. A4s with 400 RWHP and stock gears can do high 11s, very low 12s with only 110-111 traps. They're also getting 1.6 60s. He won't be running 115+ at 400 RWHP. My car runs like hell once it gets going but even trapping near 115 MPH I'm only getting 12.34 because of the 60 and I'm a decent driver. These cars don't launch like fBods. What's he trapping now and what are his 60s?

Slo4
11-29-2010, 03:38 PM
Friend of mine went 11.85 @ 117 back in the day with the 3.91s, slicks and skinnies, and catless mids. They help quite a bit, but if you don't have good tires they will create a traction problem.

Fastdriver1992
11-29-2010, 04:24 PM
Friend of mine went 11.85 @ 117 back in the day with the 3.91s, slicks and skinnies, and catless mids. They help quite a bit, but if you don't have good tires they will create a traction problem.

he's got mickey thompsons, drag bags, and polyurithane bushings in the back. he ran the car wit street tires and couldnt hook up and only 60' 2.200 and ran 13.5 at 105 short shifting at 6000rpms

but since then he's added new injectors that he needed cause his were maxed out.

so drag radials
injectors
new gears
and shift at 6500rpms

svede1212
11-29-2010, 05:39 PM
he's got mickey thompsons, drag bags, and polyurithane bushings in the back. he ran the car wit street tires and couldnt hook up and only 60' 2.200 and ran 13.5 at 105 short shifting at 6000rpms

but since then he's added new injectors that he needed cause his were maxed out.

so drag radials
injectors
new gears
and shift at 6500rpms

He maxed out his injectors? I didn't max mine out until quite a bit over 400 RWHP. I was also trapping 104-105 and 1.9x 60s bone stock with stock BFGs. The traps he's running don't sound right. IMHO gears are going to make his driving worse and I think they won't be a good bang for the buck on the strip. My 2

Fastdriver1992
11-29-2010, 08:26 PM
He maxed out his injectors? I didn't max mine out until quite a bit over 400 RWHP. I was also trapping 104-105 and 1.9x 60s bone stock with stock BFGs. The traps he's running don't sound right. IMHO gears are going to make his driving worse and I think they won't be a good bang for the buck on the strip. My 2

yea he was running like a 108% duty curve. alot of the problems when he raced was his driving. i'm trying to give him some pointers to get a better 60'. so we'll see what the car does in the spring.

MD04Goat
11-30-2010, 09:49 AM
This.

svede1212
11-30-2010, 02:59 PM
yea he was running like a 108% duty curve. alot of the problems when he raced was his driving. i'm trying to give him some pointers to get a better 60'. so we'll see what the car does in the spring.

Sounds like his tune is really rich.

Mark1si
12-02-2010, 03:58 PM
IMHO gears are going to make his driving worse and I think they won't be a good bang for the buck on the strip. My 2

I agree. I have 3:91 also and they are fun while playing around on the streets. If I had it to do over again I would have a bought engine bolt on instead. Even with D.R. and a good burn I still spin and all I have is a Svede, LTs w/catless mids a home made P/P T.B. and a tune that I have done myself on a slipping clutch.

66tomcat
12-03-2010, 09:27 AM
i trap 115 -116 in the mis 11s , and only 358 rwhp.
i have a built auto and a stall ,and i have done a lot of weight reduction.
1.51 60' with the 3.91s