Tally TransAm

iTrader: (17)

just curious to what the average et and mph gains are going from 3.42's to 4.30's (or since more people have 4.10's we can compare that too) on a H/C car

thanks

LOnSLO

iTrader: (15)

I cut 4 tenths off going to the 4.30's. I ran a 27" tire also. 6700 through the traps.

Tally TransAm

iTrader: (17)

any mph gain???

1madss

iTrader: (10)

I dropped .3 in the 1/4 going from 3.42's to 4.10s.

Gears won't increase your mph. Maybe 1 mph if that. They will only drop your ET.

LOnSLO

iTrader: (15)

Can't remember for sure, but 1 to 2 mph seems about right.

MARKSZ71

iTrader: (3)

almost 4 tenths going to 430 gears,with 430s u will need at least a 26inch tire

Tally TransAm

iTrader: (17)

i was planning on 4.30's and 27" tire at the track and 275 60 15 on the street

the reason i ask about mph gain is because now i go through the traps just after shifting to 4th and im nowhere near the powerband, so i figured being higher up would add a few mph

KGSloan

i picked up 2 mph going from stock 10-bolt to my 12-bolt with 4.11's. i think that keeping the car in the desired rpm range helps out the mph. and being able to wrap out 4th is a big help too.