JFM-jr

iTrader: (23)

I currently run a 4.10 (10 bolt) 4l60E Yank PT4400 Hoosier 26X10X15. I am going to put a 12 bolt Moser (spool) rear in. Now I can go to a 28 inch tire and bump the gear to 4.56. Problem is I dont remember what my RPM was crossing the traps (last track outing was Nov '04 LOL). I know she did lockup in 3rd before I crossed. Should I go with a 4.11 and stay with the 26? I dont wanna push her beyond 6800 thru the traps would 4.56 on a 28 inch tire keep me under that with my combo. I'm thinking the 4.56 on a 28 will make the car ET better. Any opinions?

camarokid94

iTrader: (2)

what mph are you running ??

JFM-jr

iTrader: (23)

car ran 10.66@125 on a 1.41 60'

NHRAFORMULA00

iTrader: (2)

with 4.11 gears in my car(STRANGE 12 bolt) at 124 mph,i go threw the traps at 6900 with a pt4400 on 28 et drags.1.42 60 ft,the taller tires help a lot on the launch.with a 26 inch tall tire you should of been going threw over 7000

JFM-jr

iTrader: (23)

NHRA are you running the 4L60 like me? If so does your converter lock up in 3rd at about the 1K foot mark? I was nowhere near 7K goin thru the traps we have very similar setups and HP/trq numbers.

NHRAFORMULA00

iTrader: (2)

yes 4l60e.No my converter does not lock up,lock up under full throttle generates gobs of heat in the trans.i dont see how yours is locking up without a manual switch to do it.you might want to call Yank to talk to them about it., because might toast your tranny.

JFM-jr

iTrader: (23)

Spoke to Mike at Yank today and I am staying with the current combo only a 4.11 now in the 12 bolt as opposed to the 4.10 in the 10 bolt. NHRA that trap rpm seems pretty high on a 28. Anybody else out there runing our combo's with some trap RPM feedback? Thanks !

Jantzer98SS

iTrader: (54)

I ran 125-6 bouncing off the rev limiter of 6800 rpm with 4.10's PT4400 w/lockup switch and 26" Hoosiers. 4.30's and 28's would be similar gearing I think.

JFM-jr

iTrader: (23)

Here are some vids from '04 at the track. Listen closely near the end keep in mind I have no lockup switch. 10 bolt 4.10 26" Hoosier
Click here to see Video
Click here to see Video
Click here to see Video