72 into a 70.....LT1
Safety Car
Joined: Dec 1999
Posts: 3,577
Likes: 822
From: PA
Revi, that was where I intended to run it. Never quite got there though...
Regards,
Stan
Drifting
Joined: Oct 2005
Posts: 1,615
Likes: 150
From: Forth Worth TX
Some details may help.
- Car scaled at the track at 3,342.
- Spare tire was removed
- Side exhaust mufflers were removed.
- Headers (open)
- Air cleaner lid and filter removed. (Base remained)
- Choke butterfly removed.
- Alt belt removed.
- Track was at sea level.
It was a very stock car then and has remained that way.
- Car scaled at the track at 3,342.
- Spare tire was removed
- Side exhaust mufflers were removed.
- Headers (open)
- Air cleaner lid and filter removed. (Base remained)
- Choke butterfly removed.
- Alt belt removed.
- Track was at sea level.
It was a very stock car then and has remained that way.
My idea of "all stock" is, spare tire in place, 2 1/2" under car exhaust in place, cast iron exhaust manifolds in place, air cleaner/filter in place, choke in place, Alt belt in place. While all of the little drag strip tricks are great for best E/T & MPH, they aren't exactly "all stock".
Last edited by Revi; Aug 19, 2016 at 04:19 PM.
Dr. Detroit
Joined: Mar 2012
Posts: 10,090
Likes: 4,015
From: New Braunfels Texas
The engine in question was blueprinted and tolerance stacked to the extreme. Chamber volumes were brought down to GM minimums (I think GM specified 63.2 cc as minimum, I was at 63.4, nominal is 64, production can run as high as 68), three angle valve job (not stock, but ok as per the rules), minimum deck clearance, maximum piston to wall clearance, 20 - 20 under on the rods and mains, stock rocker arms with ratios between 1.51 and 1.53, etc., etc., etc. Static compression ratio worked out to around 11.4 to 1... There was a little piston slap at start up, but it quieted down after it warmed up. Good little engine...
The fact remains that with all GM parts, it made 400 horsepower... Through the manifolds... With the A.I.R. hooked up.
Regards,
Stan
The fact remains that with all GM parts, it made 400 horsepower... Through the manifolds... With the A.I.R. hooked up.
Regards,
Stan
Probably a 4:11 car with a close ratio box eh?
A five angle job with blending and backcut valves is the single biggest power maker on these engines......
My 66' L-79 was a beast after I did that (Car in Avatar).
Jebby
