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I posted this in here because i thought it would get the most views. I appreciate the help you guys have given so far. With that being said......I have a 66 nova chassis car wiht a 461 12:1. holley heads, solid roller cam. Powerglide withe a 5.00 gear, 33" tall tires. 60' times on car are soft i think with a best of 1.48. It is a 9" converter though. Would switching to a 8" converter really help out in 60' and ultimatelt ET? I was thinking the rotating mass would be less, hence letting the motor rev quicker and making the transmission more efficient. Does this sound reasonable? I know ive seen similar combonitations to mine with a higher gear running 9.80's-9.90's. It has ran a best of [email protected] at norwalk, running through the traps at 7100rpm, 4600 launch. Cam is 270-280 duration .714/740 lift. Thanks for the help? Any other suggestions?
 

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Your leaving on the brake at 4600rpm? I would say yes, leaving at 5500, the car will probably 60 better if it sticks. It seems like you're in the ballpark though. I bet you could get in the 9's without changing anything, just making suspension adjustments. That 3500lb tank <<<< runs 1.49's on the foot brake with street tires....I think your Nova has more in it the way it is.
 

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6000 8". Chance coan or Ucc should be able to handle it for you.

Tim
 

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You do not have to have a small converter to 60' well.
I run a 9.5" and my last time out I had a 1.28 60' with my little small block 4000 launch with 5.13 gears. 2865lbs.
 

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Not saying it has to be 8" to 60" well but a 8" will be faster that 9.5" with the same stall

Tim
 

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Discussion Starter #8
thanks for the replies. Yes, i am leaving at 4600 on the brake and the converter will stall up to 5500 if i crank up the chip and max it out. So far i have made no suspension adjustments to the car at all. I need to play with the ladder bars and pinion angle to see if it changes anything.
 
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