Too much gear for an A4?
Thread Starter
10 Second Club
iTrader: (12)
Joined: May 2004
Posts: 930
Likes: 0
From: Chicago IL/ Lake Geneva WI
Too much gear for an A4? Would a 4.56 gear with a 26 inch M/T radial be too much? My car is stock internal, weight reduction, 2800 yank stall, lid, headers, ported tb and ls6 intake. I found one locally on the cheap. Gas mileage is of no concern.
I think it has the potential too be a bit too much. Had the car been a M6 I would say it's probably just right (for a mainly track set up). When dealing with either trans the 1:1 ratio is the same but that 1st gear with that small of a tire MAYBE too much given the steeper 1st gear in the Auto.
Until you try and see you wont know.
For those who take into consideration gas milage 3.73 is "Generally Accepted Average", 4.10's "Hot Street Setup", 4.30's "General Accepted Race Track Ratio"
I'd start running some gear calculator and take into consideration Tire size from 26" to 28" tall as the taller the tire will knock down the ratio but often contact patch increased which allow to better hit the tire.
Until you try and see you wont know.
For those who take into consideration gas milage 3.73 is "Generally Accepted Average", 4.10's "Hot Street Setup", 4.30's "General Accepted Race Track Ratio"
I'd start running some gear calculator and take into consideration Tire size from 26" to 28" tall as the taller the tire will knock down the ratio but often contact patch increased which allow to better hit the tire.
Exactly, the power set up ultimately will dictate needs. JL is VERY much advocating me adding 4.56's to my M6 car and with a street/track driven 28" tall tire and not putting a bottle to it.
Gearing will certainly help that Lo Po stall converter BUT considering its being sprayed IMO I would do a 4.10 and try it out on the 26" tall tire and see where it gets you.
You may run out of RPM, hopefully you can bump that but if you cant, up the tire to either 27 or 28.
Also to mention IF going with a ET Drag, you generally get approx 1" of tire growth at speed. Which again will help you. Luckily with that tight of a stall your not going to be losing RPM due to slip.
I am willing to wager that gearing calc in the rear end section is pretty accurate to your MPH traps. Just monitor or log the RPM and look at the Slip.
You may run out of RPM, hopefully you can bump that but if you cant, up the tire to either 27 or 28.
Also to mention IF going with a ET Drag, you generally get approx 1" of tire growth at speed. Which again will help you. Luckily with that tight of a stall your not going to be losing RPM due to slip.
I am willing to wager that gearing calc in the rear end section is pretty accurate to your MPH traps. Just monitor or log the RPM and look at the Slip.
Trending Topics
i run a auto with 430 gears and 26 inch tall tires and i think its too much gear which is why i want to run a 27, but i do run 1/8th mile around here. i debated between the 430's i ended up going with and the 456's. If you were to step up to a 28 tall tire i think you would be fine. EDIT i just saw that you are on spray so yeah i would definetly go with a 4.10 maybe even 373 gear
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
