cleveland powered street stock questions

cleveland powered street stock questions

Joined: February 8th, 2011, 1:23 am

June 19th, 2012, 10:53 pm #1

I am running a 73 torino geared 670 total and weighing 3860. The car is finally getting competitive, but needs help getting off the corner better. I am not having any grip issues, the motor just feels too flat off the corner.
race rpm is 4500-5600. This is a 4412 class
I am running old trw 2348 pistons with closed chamber 4v heads and a comp 280h cam. I am thinking that putting on a set of 2v heads might help this problem, but hate to give up the compression, and dont know if or how much hp I will be losing.

I have also thought about gearing it steeper, as this is what it feels like it needs, but hate to turn it any harder than needed. All of the other gm cars (that all meet the 3400 lb min) are geared 650, and get off the corner just fine.

any other 351c dirt trackers out there?
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Joined: February 13th, 2006, 4:59 am

June 19th, 2012, 11:23 pm #2

I assume you have to run stock carb and intake? What is your timing set at and what about cam timing? That thing should pull hard out of corners with those gears?What are specs on that cam.
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Joined: February 8th, 2011, 1:23 am

June 19th, 2012, 11:29 pm #3

holley 4412 500cfm on 73 4v spreadbore man. stock 4v exhaust manifolds.
Last edited by 73torino17 on June 19th, 2012, 11:30 pm, edited 1 time in total.
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Joined: February 13th, 2006, 4:59 am

June 19th, 2012, 11:43 pm #4

I looked up the cam specs and I think that should be all right out of corners. I think you are way under carbed but maybe you have to run it in class?if so what kind of air intake do you have so we can get that thing breathing harder?Does the carb have to be 500 CFm or ford year specific?You could up to boss style carb which is 715 CFm. Or a holley in that 750-780 range?
Last edited by steve.k on June 19th, 2012, 11:49 pm, edited 1 time in total.
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Joined: February 8th, 2011, 1:23 am

June 19th, 2012, 11:54 pm #5

Rules are 4412 only, stock cast iron intake and stock cast iron exhaust manifolds.
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Joined: June 12th, 2009, 1:31 pm

June 20th, 2012, 12:09 am #6

I am running a 73 torino geared 670 total and weighing 3860. The car is finally getting competitive, but needs help getting off the corner better. I am not having any grip issues, the motor just feels too flat off the corner.
race rpm is 4500-5600. This is a 4412 class
I am running old trw 2348 pistons with closed chamber 4v heads and a comp 280h cam. I am thinking that putting on a set of 2v heads might help this problem, but hate to give up the compression, and dont know if or how much hp I will be losing.

I have also thought about gearing it steeper, as this is what it feels like it needs, but hate to turn it any harder than needed. All of the other gm cars (that all meet the 3400 lb min) are geared 650, and get off the corner just fine.

any other 351c dirt trackers out there?
that rpm isnt in the sweet spot yet.
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Joined: February 8th, 2011, 1:23 am

June 20th, 2012, 12:23 am #7

What do you figure I should turn it with this cam for max rpm.

most of the heavy cars that I have seen work good at this track, were very over geared, and were out of breath by the flagstand.
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Joined: September 5th, 2006, 1:33 am

June 20th, 2012, 12:26 am #8

that rpm isnt in the sweet spot yet.


Like Dan, I don't think it is turning enough RPM to use it's breathing advantages over the Chivvies. When I ran circle track with a 351C, we were allowed headers, but we had to run that stupid 2bbl rochester that came on SBCs. I was turning a thousand or so RPM higher than your 5600 limit, and had no issues, considering the rules. Of course, the Chivvie guys at my track eventually got together and got Cleveland and Boss heads outlawed, but that's another issue. Pardon the blanket statement, but no factory iron Gen 1 SBC head has ever or will ever run with a 4V Cleveland head, IMO, so a little more dialing in should get you where you want to be.

A Visigoth explains the sack of Rome: We wanted art, literature...culture! We're sorry we broke some stuff.
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Joined: February 8th, 2011, 1:23 am

June 20th, 2012, 12:28 am #9

I assume you have to run stock carb and intake? What is your timing set at and what about cam timing? That thing should pull hard out of corners with those gears?What are specs on that cam.
sorry, missed the question about timing. Distributor is at 36 total, and cam is installed straight up.
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Joined: October 1st, 2004, 8:05 pm

June 20th, 2012, 12:48 am #10

I am running a 73 torino geared 670 total and weighing 3860. The car is finally getting competitive, but needs help getting off the corner better. I am not having any grip issues, the motor just feels too flat off the corner.
race rpm is 4500-5600. This is a 4412 class
I am running old trw 2348 pistons with closed chamber 4v heads and a comp 280h cam. I am thinking that putting on a set of 2v heads might help this problem, but hate to give up the compression, and dont know if or how much hp I will be losing.

I have also thought about gearing it steeper, as this is what it feels like it needs, but hate to turn it any harder than needed. All of the other gm cars (that all meet the 3400 lb min) are geared 650, and get off the corner just fine.

any other 351c dirt trackers out there?
Does the motor flatten out in the same way accelerating in a straight line, or does it only do that accelerating out of corners?

If only out of corners I'd suspect a carburetor issue (fuel slosh). Just throwin' that out there.

-G
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