Yet another Auto / Gear Question

[Big Ben]

2011 5.0 Premium 6A

Previous Mods:

Steeda / CAI / Dyno tune (local guy) / Lethal off road H and Kooks AB's / 125 shot Wilson Kit / LCA's / Stock 3.15's / 26 inch ET Streets.

Best time 11.145 @ 126 mph 1.7 60ft

Car would shift into 4th right before the traps on spray. I thought with this gear / tire combo it would stay in top of 3rd?

I had a slight accident and had to replace the reared and bought one with a 3.31 in it and did an UCA at the same time. I really wanted to do 3.73 for more street driving fun but keep reading 3.31 is the best choice. I am thinking if my current combo shifts into 4th right before then the 3.31 will still not have me in a sweet spot at the traps. Trying to refrain from going to a 28" tire as the 26" fit so nice in the trunk / back seat lol.

I plan to return to the track soon and will see what it does just wanted opinions. I no doubt should be seeing 10's already and I don't want to do a converter.

 

[WHITEMACH]

?? is ,,, if you are running a 26 inch tire at the track, you are already 1.5 inches shorter than stock, which 1.5 inches of tire is a lot, with spray stay with the 3.31 and go to a 27.5 to 28 inch tire.

I think if you go to a 3.73 with a 26 inch tire @126mph you will finish in 5th gear

 

[9secWS6]

My times in my sig. Are with 3.73s. I didn't run the car on nitrous with the 3.15s but it picked up a little over a tenth on motor with the gear swap. I mainly did the 3.73s for street driving. Even if it didn't help any it was worth it to me for the feel alone.

 

[Need4Speed03]

Run it with the 3.31's and the 26" tires...should work fine. I ran the times in my sig with the stock 3.15's and a 26" tire and the 3.31's should work slightly better.

 

[4VFTW]

you are not going to be able to stay in 3rd with any tire and a 3.31 gear. you will hit the stripe at 6200rpm in 4th with the 3.31's and that is fine although 3.55's would probably be optimal putting you at 6700.

 

[manolith]

dont 4.10 work really good on the auto? i would imagine that it will put you at around 7k at the stripe in fourth.

 

[4VFTW]

dont 4.10 work really good on the auto? i would imagine that it will put you at around 7k at the stripe in fourth.

with a Boss IM yes but even then he would be at 7700rpm with that 26" tire.

 

[manolith]

with a Boss IM yes but even then he would be at 7700rpm with that 26" tire.

what about a 28 inch tire?

 

[4VFTW]

what about a 28 inch tire?

would be perfect

 

[Big Ben]

Great comments thx people.