LosLs1's

iTrader: (21)

Alright guys need your input on this one... Quick brief on the car 4th gen Camaro 3680lb race weight (might drop more weight, new year new me) lol front mount setup running a 4l80e with Trans brake... 9" rear end with 3.55 gears 28" tall tire ... Now would I benefit with sticking with the 3.55 or going with either 3.25 or even 3.00 I understand that turbos like a load so would I benefit with sticking with what I have now being the car is a pig?

LosLs1's

iTrader: (21)

Oh and it's for 1/4 mile racing

MY_2K_Z

iTrader: (1)

Well what are your trap Rpms at with the 3.55s

LosLs1's

iTrader: (21)

I trapped 134 I was blowing threw the converter launched on the foot brake... 134mph 6500rpm haven't taken it out do to weather but gonna get this thing tuned again soon

LosLs1's

iTrader: (21)

I'm wondering if it be faster with the 3.00/3.25 vs the 3.55

gtfoxy

Only one way to find out & that's to try them out. I would say 3.2's would work well, overall, if you have the power to pull more MPH.

If the converter is loose I would address that for sure.

How soon before the line are you at 6500?

9sectruck

iTrader: (9)

Twin turbo 365 engine 4l80 proyank 3400 3.50 gear 158mph at 7100rpm.
just changed gear to 3.70 looking for 165mph at 7700-7800rpm

Slow94Formula

iTrader: (18)

3.50s in mine too and I like them. Gear for the rpm/mph you want to go through the traps at. The "turbos like to be loaded" thing is true to an extent. 3.00 is way too much gear with a 28" tire in my opinion.

Taxman20

iTrader: (11)

What Slow94 said. Gear it to your desired trap RPM and don't worry about the mph. In drag racing you are shooting for the best ET and not MPH. ET wins races not MPH. Also a lot of ET is made in the 60ft times. Which means higher ratios, but more RPM at the finish.

As for Turbo setup and what gearing it likes, I am learning myself. About to start the build on my truck so I will fine out what it likes. I currently have 3.89 with a 4L80e but may swap to a different trany. So I am watching this thread for info.

fisherboys

just curious are you saying a 2;00 something gear would potentially be better with a 28" tall tire? Thanks Mark

handyandy496

iTrader: (9)

3:70's but that's not very far from where your at. Try a smaller diameter tire. See how you like it. What rpm stall are you thinking? What rpm are you shifting at?

transam69230

iTrader: (49)

Need to address the converter slip before changing rearend gear. You are going to get more slip with 3.25 or 3.00.

gtfoxy

He has to just look at his RPM & go from there. If you don't want to spin it past 6500 but think you can pull 5, 10 more mph then going steeper isn't going to help, I don't think. hard to say until you tighten the converter, so then the converter impacts mid-range pull, balancing act here.

If he can pull harder on the top end for more MPH & not lose 1/8th, its the way to go.

LosLs1's

iTrader: (21)

Thanks for the input guys! I'm gonna get the converter issue fixed first and get retuned... Depends on the weather but will let you guys know the results