Ray Allen versus Jack Werst '1970 SS/EA Showdown'

[Paul Ceasrine]

1971,
Ray Allen switches to GoodYear Slicks

pc

[Paul Ceasrine]

1970/1971 LS-6 Intake Manifold
Chevrolet Part #3963569
Low-Riser Big Block Dual-Plane

Carburetor Holley 800 CFM (1 11/16" x 1 11/16")
Square bore carburetor mount / rectangular-shape intake port

The Low-Riser was required, to allow for proper hood clearance.
Intake was for both the Corvette and Chevelle SS454 LS-6 cars.

[Rich Biebel]

Originally Posted by Paul Ceasrine

1970/1971 LS-6 Intake Manifold
Chevrolet Part #3963569
Low-Riser Big Block Dual-Plane

Carburetor Holley 800 CFM (1 11/16" x 1 11/16")

A side view would show the carb mounting pad being nearly lower than the tops of the runners.....

[Paul Ceasrine]

Rich,,,,,,,

That's for the Chevy guys to post,,,,,,,
I'm Mopar,,,,,,so if I post that photo,,,,,,,,,I will be a Benedict Arnold,,

Technical info,,,,
The carburetor mounting-base on the #3963569 Low-Riser Intake manifold,,,,,,,,,,only 1.25" above the cylinder head ports...

pc

[Bob Pagano]

No body used that manifold, the 1970 rule book stated you could use another gm intake with a max + 1 inch and a 1inch spacer, they all used the highrise untill the rules went to aftermarket intakes.

[Paul Ceasrine]

Bob,,,,,,
Correct,,,,,,,,,,the #3963569 Low-Riser was the factory intake,
which nobody used in Super Stock for 1970.

but, many racers in 1970, used the 1969 #3933163
Aluminum Dual-Plane High-Riser, which was standard on
the 1969 396/375HP and 427/425HP engines,,,,,,

or an after-market
(ie; Edelbrock or Weiand or Offenhauser) Aluminum Dual-Plane High-riser.

pc

[X-TECH MAN]

Originally Posted by Paul Ceasrine

Bob,,,,,,
Correct,,,,,,,,,,the #3963569 Low-Riser was the factory intake,
which nobody used in Super Stock for 1970.

but, many racers in 1970, used the 1969 #3933163
Aluminum Dual-Plane High-Riser, which was standard on
the 1969 396/375HP and 427/425HP engines,,,,,,

or an after-market
(ie; Edelbrock or Weiand or Offenhauser) Aluminum Dual-Plane High-riser.

pc

The 396 and 427 intakes were later legal for A/SA as Kenny Koonce used one on his 1970 Chevelle LS-6 car in stock.

[danny waters sr]

Originally Posted by Rich Biebel

A side view would show the carb mounting pad being nearly lower than the tops of the runners.....

I remember those being called "low profile alluminum intakes"

[K Stubbs]

Originally Posted by Paul Ceasrine

1970/1971 LS-6 Intake Manifold
Chevrolet Part #3963569
Low-Riser Big Block Dual-Plane

Carburetor Holley 800 CFM (1 11/16" x 1 11/16")
Square bore carburetor mount / rectangular-shape intake port

The Low-Riser was required, to allow for proper hood clearance.
Intake was for both the Corvette and Chevelle SS454 LS-6 cars.

Why didnt anyone use the "474" highrise manifold back then? It even had an open plenum.

[Paul Ceasrine]

1970 Summernationals @ York US30 Drag-O-Way
SS/EA Class Winner
Tim Richards in the Karl Gould 1970 Superbird 426 Hemi
(engine by Sox & Martin, transmission by Tim Richards)