New member in San Diego
- Thread starter Will Hren
- Start date
Maniacmechanic1
solid fixture here in the forum
Welcome !
welcome to the web site
logically you start with the basics and calculate the basic engines characteristics and limitations
the strong point potentially with the 283 is the ability to reve, a 3" stroke and slightly longer than stock aftermarket connecting rods,
that are considerably stronger than stock,and some basic math,
should provide the basics.
Id suggest you don,t exceed 4300 fpm , with a 3" stroke thats about 8300 rpm
once you know that your surely in the solid lifter, with a rocker stud girdle valve train realm.
Id be looking at 6" rods with 7/16" arp rod bolts. and forged pistons.
youll want to maximize power, and at close to 8000 rpm , and if running e85 youll want about 14.5:1 compression,probably a tunnel ram intake,
with two alcohol compatible carbs, and a port cross sectional area near 2.5- 3 sq inches,
and a cam with a lobe and ramp designed for good valve control,
and max flow at near 8300 rpm.Id ideally use a solid roller cam,
but there are solid flat tappet cams that do provide decent potential.
Id suggest you call several cam manufacturers , for advise
once you have calculated several other factors.
I would not select the 175cc port heads for a serious power, youll need something larger.
and yes that might be difficult , to locate when limited to the 1.94 intake valve.
yes theres always the option of buying the trickflow heads and having the heads ported
you might also consider a nitrous plate or direct port nitrous foggers with that E85 fuel
heres some useful calculators
http://www.wallaceracing.com/Calculators.htm
http://www.wallaceracing.com/runnertorquecalc.php
logically you start with the basics and calculate the basic engines characteristics and limitations
the strong point potentially with the 283 is the ability to reve, a 3" stroke and slightly longer than stock aftermarket connecting rods,
that are considerably stronger than stock,and some basic math,
should provide the basics.
Id suggest you don,t exceed 4300 fpm , with a 3" stroke thats about 8300 rpm
once you know that your surely in the solid lifter, with a rocker stud girdle valve train realm.
Id be looking at 6" rods with 7/16" arp rod bolts. and forged pistons.
youll want to maximize power, and at close to 8000 rpm , and if running e85 youll want about 14.5:1 compression,probably a tunnel ram intake,
with two alcohol compatible carbs, and a port cross sectional area near 2.5- 3 sq inches,
and a cam with a lobe and ramp designed for good valve control,
and max flow at near 8300 rpm.Id ideally use a solid roller cam,
but there are solid flat tappet cams that do provide decent potential.
Id suggest you call several cam manufacturers , for advise
once you have calculated several other factors.
I would not select the 175cc port heads for a serious power, youll need something larger.
and yes that might be difficult , to locate when limited to the 1.94 intake valve.
yes theres always the option of buying the trickflow heads and having the heads ported
you might also consider a nitrous plate or direct port nitrous foggers with that E85 fuel
heres some useful calculators
http://www.wallaceracing.com/Calculators.htm
http://www.wallaceracing.com/runnertorquecalc.php
Last edited:
Thanks very much for the advice. I’m absolutely planning on a solid roller cam, stud girdles, and light weight valve train. Based on what I’ve been able to find for off the shelf heads, achieving a port cross section that large on anything that comes w 1.94 valves will probably require professional porting. If anyone knows of 1.94 heads w small chambers and exceptional potential w porting im all ears! That’s why I had interest in the super 23 heads even though they are not 100% ideal out of the box .
Thanks
Thanks
Loves302Chevy
"One test is worth a thousand expert opinions."
Check out the links I gave in your other post.
Maniacmechanic1
solid fixture here in the forum
My 1 st experience with a 283 Chevy was back in 1983.
I worked at an Auto Parts store Parts Plus & Schwinn Bicycle store.
All in the same building.
I was 14.
The Shop truck was a 1963 Chevy Panel Truck.
The Owners Son was Gearhead and a Pro BMX Racer that won several national events.
The 1963 Chevy had a 283 with Corvette Fuelie Heads installed.
A solid lifter cam specs unknown.
4- speed on the floor.
Geared Low I recall.
Stu would Rev it up to 6,000 + & dump the clutch & front wheels sometimes would come off the ground 1 inch.
Stu also had a 1976 Pontiac Trans Am 400 Auto TH350.
Exposed to Street Racing & Drag Racing by him.
Stu's dad also had a 1957 Chevy Bel Air with a 283 & Muncie 4-speed.
Used to Drag race it pro back in the 1960's.
I know the factory iron heads were bone stock.
Not huge 300-500 cfm airflow @ 28 inches water depression.
I worked at an Auto Parts store Parts Plus & Schwinn Bicycle store.
All in the same building.
I was 14.
The Shop truck was a 1963 Chevy Panel Truck.
The Owners Son was Gearhead and a Pro BMX Racer that won several national events.
The 1963 Chevy had a 283 with Corvette Fuelie Heads installed.
A solid lifter cam specs unknown.
4- speed on the floor.
Geared Low I recall.
Stu would Rev it up to 6,000 + & dump the clutch & front wheels sometimes would come off the ground 1 inch.
Stu also had a 1976 Pontiac Trans Am 400 Auto TH350.
Exposed to Street Racing & Drag Racing by him.
Stu's dad also had a 1957 Chevy Bel Air with a 283 & Muncie 4-speed.
Used to Drag race it pro back in the 1960's.
I know the factory iron heads were bone stock.
Not huge 300-500 cfm airflow @ 28 inches water depression.