Converter multiplication ?

[L79racer]

Originally Posted by 1320racer

how big are the heads, what is the cam @ .050, what intake manifold and what carb?

195 comp. ported AFR heads solid roller 2.58 / 2.65@ 50 Victor Jr. 2" spacer with a hp 950 Just under 11.1 compression. 1 3/4 headers

[Alan Roehrich]

You don't have enough gear, nor do you have enough low gear in the transmission. You don't need to try to "fudge" anything by telling them you're putting it behind a Super Stock engine, besides, when you give them the specs, they'll know. You need a 4.88 or a 5.13, and about a 1.90 low gear.

[L79racer]

Originally Posted by Alan Roehrich

You don't have enough gear, nor do you have enough low gear in the transmission. You don't need to try to "fudge" anything by telling them you're putting it behind a Super Stock engine, besides, when you give them the specs, they'll know. You need a 4.88 or a 5.13, and about a 1.90 low gear.

Thanks for your input. I will be trying a 28" tire to see how it likes it and what rpm it will be at crossing the big end. If it likes it, I will go to the 4.88 and 29" tire.

[1320racer]

Originally Posted by L79racer

195 comp. ported AFR heads solid roller 2.58 / 2.65@ 50 Victor Jr. 2" spacer with a hp 950 Just under 11.1 compression. 1 3/4 headers

2" spacer equals too much plenum volume which helps to kill the launch though and the cam is too big at .050.

That said, the quick fix is more gear or a 3 speed trans and a shorter tire.

Here's an example of a 3160 lb. footbrake launched ride slowed every week to run low 10.0s with a sbc under the hood backed by a 1.80 1st gear glide that leaves with a best 60 foot to date of 1.27 and has run 9.77 @ 138+ with a manifold having less plenum volume than yours and no 2" spacer

[L79racer]

Originally Posted by 1320racer

2" spacer equals too much plenum volume which helps to kill the launch though and the cam is too big at .050.

That said, the quick fix is more gear or a 3 speed trans and a shorter tire

Thanks for your input also. I will try the shorter tire to see if it likes it. Then add more gear if it does.

[L79racer]

One more question. If I change the gears to 4.88 and it leaves harder will I not see a big increase in the top end rpm because I would get there quicker? I dont want to be spining it higher than 7400 up top.

[1320racer]

you'll be turning 2-300 more RPM in the lights than you are now

[L79racer]

Originally Posted by 1320racer

2" spacer equals too much plenum volume which helps to kill the launch though and the cam is too big at .050.

That said, the quick fix is more gear or a 3 speed trans and a shorter tire.

Here's an example of a 3160 lb. footbrake launched ride slowed every week to run low 10.0s with a sbc under the hood backed by a 1.80 1st gear glide that leaves with a best 60 foot to date of 1.27 and has run 9.77 @ 138+ with a manifold having less plenum volume than yours and no 2" spacer

What size motor, converter, rear gear, shift rpm and trap rpm. From that 60' I'm not even in the ball park. What carb and manifold is on it? If its top secret stuff PM me. LOL!!

[1320racer]

Originally Posted by l79racer

what size motor, converter, rear gear, shift rpm and trap rpm. From that 60' i'm not even in the ball park. What carb and manifold is on it? If its top secret stuff pm me. Lol!!

400, 10" 4.56, 7300, 7500, old school 830/4150, Brodix/HVH. The converter and carb were not selected for optimum 60 foots, ETs and MPH.

[L79racer]

Originally Posted by 1320racer

400, 10" 4.56, 7300, 7500, old school 830/4150, Brodix/HVH. The converter and carb were not selected for optimum 60 foots, ETs and MPH.

Whats the stall? Thats a good running car. I will try and run mine without the spacer and see if it helps. I'll be at Etown in a few weeks for the Corvette challenge and give it a shot.