99LS1Bird

i have 2.73 now with a tr 230/224 cam under drive pulley mac mid length headers and y pipe i run very consistent 13.4 at between 108 and 109.5 what should i run when i install 3.73

7.0 camaro

good question. im fixing to go from 2.41 to 3.42. i have no clue what it will do

subarubill96

iTrader: (9)

hopefully mid 12's, your MPH is screaming 12's as it is with out the gear change. whats your DA?

01ssreda4

iTrader: (96)

I think you see see a nice drop in et. Half a second too optimistic??

cambirdracing

iTrader: (4)

I wouldnt' do that. I would go to 3.73. Sounds like it won't make much of a diffence, but you will be disappointed with the 3.42. Believe me, I have been there.

run em down

iTrader: (1)

your running 13.4 with a cam and 2.73???? i have 2.73's with boltons no internals and im runnin 12's on street tires. doesnt sound right u should be in 12's already. but back to the question with a gear change that big i would say 3-5 tenths off.

7.0 camaro

i run 1/8th mile bracket. they dont make a 4.88 gear for the 7.5 and the 4.56's are junk. ive went 6.70's at 105 with a 3.42 gear. ill be fine.

Tommyv8

iTrader: (8)

99LS1Bird, what are your 60 ft times? I usually run 12.8s @ 109 on a 1.9 60 ft.

99LS1Bird

i usually run a 13.4 at 108.8 with a 2.0 60 foot my best so far was a 13.3 at 109.8 with a 1.9 60 foot i have a thunder racing 230/224 cam mac mid length headers whisper lid underdrive pulley. im still on stock converter though

BLOWN SS/T

iTrader: (3)

I would do a converter first and get that car into the 12's already MPH is there. Then swind some gears in there. But either one should get you a 12, what are you looking to gain from the gears?

99LS1Bird

im looking for low 12's high 11's all motor ive yet to get a dyno tune im still on stock fuel pump and injectors stock heads stock ls1 intake manifold just sum simple bolt ons and a medium cam i know i still have alot more i can get out of it

01ssreda4

iTrader: (96)

Here's a short shopping list. Long tubes and LS-6 intake so your cam can breathe. 3.23s or 3.73s and throw in some SVO 30 injectors bc you are probably maxing your stock ones out.

run em down

iTrader: (1)

i would do longtubes, around a 3600 stall, and a nice tune. if its a dd, 3.42's gears are plenty good enough on an a4. idk man you should be in the 12's already, im runnin less bolton's then you with stock internals/tranny and 2.73's and im in the 12's on street tires. i would say high elevation? but your down south in La.

Maybe you need to clean the engine out with some seafoam?? lol.

Quik Sand

iTrader: (6)

with that stuff your car should be in the 12s easily

oddwraith

iTrader: (1)

Yeah but with no dyno tune and stock fueling with the LS1 intake he's not going to get anywhere near where he should be at. That car has potential just by adding the LS6 intake and getting it tuned. That would be my very first thing to do on that car. Then Lts, stall, gears. Just my two cents.

hotjohnnyls1

i have a 2002 z28 a4 and i have lt's ls6 manifold off road y pipe lid and i ran a 13.3 at 109 and i was wondering if i put in the 3.73's i should be mid to high 12's right?

oddwraith

iTrader: (1)

I don't know for sure what your elevation etc is there, but I would have thought you would already be high twelves with those mods. Or could be there with traction maybe? I have never ran mine so I can't really comment further, just basing my opinion on what I have read here and other places.

hotjohnnyls1

well traction was an issue but the 2.73's dont help either! i think when i hit the lotto i can buy some good tires! lol

01ssreda4

iTrader: (96)

They should get you to the very high 12s. But what you car is running is good for having so few mods.

MadIceV8

iTrader: (12)

MACs actually flow pretty good, so I wouldn't waste the money unless you have it to upgrade. If your a A4 you defiantly should get a 3000+ stall (depending on DD or not). With just a 3200 Stall, LTs, and some suspension I was pulling 12.5s on a bad 60ft and full weight.