gears

[pewter Z28]

just wondering if anyone can help me i have a 2000 camaro z 28 mass air,k and n filter,throttle body upgraded stock other than that what gears brand where to get so on thanks any help would be great i think stock is 2.43 or something real close

[67CamaroRSSS]

If you're an A4 then the stock gearset would be 2.73 (GU2) with 3.23 (GU5) being the optional gearset. Check your door info to see.

Best all around gearset for an A4 is 3.73. Get AAM gears if you can. Richmond as an alternate. I don't want to cause problems but I've had nothing but gear whine out of Motive gears.

And if you do a high stall torque converter stock 3.23's will work just fine.

1st: SFC's, SFC's, SFC's... You want to be able to close the doors down the road yes???
2nd: TC with associated tranny mods. This includes a cooler.
3rd: LS6 intake manifold.
4th: Exhaust. Lots of ways to go here.

At this point you'll probably have to upgrade rear suspension cuz it'll be romping real hard. See my sig for details.

There are way more things to do but think of doing these first.

[pewter Z28]

how do you feel about bolt ons sfc

[pajeff02]

Bolt on SFC's are fine and can always be welded later. We have UMI 2 point bolt ons installed under our car. They definitely make a difference. If you are an autocrosser, or plan on having a tunnel mount torque arm, then check out the 3 point design. I will also put in a plug for UMI -- they make great stuff.

[c5z28]

3.23's on a stock stall suck. I feel like I'm waiting for boost half the time

[TmaxicanA]

my richmond gears are noisey as hell. but the exhaust is loud enough to drown it out most of the time. sounds like a turbine on decel..i just tell passengers "prepare for lift off, this birds goin too the moon!"

[pewter Z28]

i use this as daily driver so dont wana go to deep need to drive interstate but think i need something better than 273 in automatic stock ls1
gears and stall

[c5z28]

According to the calculator gears with a 17" rim
2.73 at 70mph =1751rpm
3.23=2072 (About right in my car)
3.42=2194
3.73=2393
3.90=2502
4.10=2630
At 65mph
2.73=1626
3.23=1924
3.42=2037
3.73=2222
3.90=2323
4.10=2442
And 3.23's are out of the question so take your pick

[pewter Z28]

According to the calculator gears with a 17" rim
2.73 at 70mph =1751rpm
3.23=2072 (About right in my car)
3.42=2194
3.73=2393
3.90=2502
4.10=2630
At 65mph
2.73=1626
3.23=1924
3.42=2037
3.73=2222
3.90=2323
4.10=2442
And 3.23's are out of the question so take your pick

i have to say 373 are looking good but 410s would be fun what is good stall if i just got throttle body filter and mass air planning on slp wxhaust very soon gears stall next year tires

[c5z28]

Port the throttle body, leave the mass airflow sensor alone. What exhaust from slp, unless it's the dual dual muffler or the lm2 I advise against it for 2 reasons
1.Headers suck
2. Lm-1 with headers suck

[c5z28]

Well for bolt-on autos I am trapping a 108mph at the 1/4mile
3.23's at 110mph=4652
3.42=4925
3.73=5372
3.90=5617
4.10=5905
With a stall I guess the trap speed would go down a bit, but I like to think if you want to top out on third gear at the end of the quarter it looks like 4.10's are the best bet. I know stock for stock 3.23's yield roughly .2 e.t faster times at the track. And my 3.23's are just getting back into the power band at the end of the quarter.

[pewter Z28]

Well for bolt-on autos I am trapping a 108mph at the 1/4mile
3.23's at 110mph=4652
3.42=4925
3.73=5372
3.90=5617
4.10=5905
With a stall I guess the trap speed would go down a bit, but I like to think if you want to top out on third gear at the end of the quarter it looks like 4.10's are the best bet. I know stock for stock 3.23's yield roughly .2 e.t faster times at the track. And my 3.23's are just getting back into the power band at the end of the quarter.

how accurate are these numbers ? i feel that i would like to go 410 but gut says no go 373

[c5z28]

They are based off an auto calculator on another website. This assumes you have a 17" wheel and a .7 to 1 overdrive. 1/4 mile ones are 1 to 1. My car does about 200rpm at 70 mph, compare it to yours.

[pewter Z28]

Port the throttle body, leave the mass airflow sensor alone. What exhaust from slp, unless it's the dual dual muffler or the lm2 I advise against it for 2 reasons
1.Headers suck
2. Lm-1 with headers suck

i am thinging lm2 have aftermarket tb kn mass air flow only so far

[c5z28]

If you ever get headers it will sound like ass.

[pewter Z28]

If you ever get headers it will sound like ass.

what about magnaflow is this any better

[c5z28]

what about magnaflow is this any better

Any muffler with a chamber is going to sound better. The reason loudmouth will sound bad is because it's 1 step above a straight pipe.

[pewter Z28]

Any muffler with a chamber is going to sound better. The reason loudmouth will sound bad is because it's 1 step above a straight pipe.

good to know thanks for the advise magnaflow it is then is there any difference in mufflers or do they only make 1 cat back system .

[c5z28]

What do you mean by one catback sytem? They are are all basically the same style except borla and gmmg.
Borla being it goes straight in on the passenger side and exits the driver side, with the adjustable plate being on the passenger side.
And gmmg being chambered or almost a straight through design.
Most other catbacks have one in and 2 out design and will flow pretty close to each other with the exception of flowmaster's 80's series for our car.

Edit I think I know what you mean now, they only make the one catback kit for our cars, if you want custom then that's a different animal-like my magnaflow duals
Mark at kyspeed sells the magnaflow kit.