What Combo?????????????

[Bob Mulry]

Originally Posted by Mark Yacavone

Bob, 383 ,with 45 horsepower off it.
That'll fix just about anything.

WOW.....ALL I CAN SAY IS WOW...

750 CFM AFB
10.0 : 1 compression
203cc Intake runner


280HP with a stock head
285HP with an Edelbrock Aluminum Head


WOW...

[GTX JOHN]

I Think the AFB 0n 383/426 in 66 is around 600 CFM ( maybe a bit less than that) I own one and it is small.

[Paul Precht]

Originally Posted by Bob Mulry

WOW.....ALL I CAN SAY IS WOW...

750 CFM AFB
10.0 : 1 compression
203cc Intake runner


280HP with a stock head
285HP with an Edelbrock Aluminum Head


WOW...

This engine has some things working against it. The carb on my bench flows 566 CFM, the near 0 deck height and .020" gasket combined with a small block like stroke make any cam with even modest duration difficult to fit. Before the 383s were defactored there were not any single 4 barrel 383 Stockers out there with maybe a rare exception. The 383 is Mopar's most common engine, it's what the 350 is to Chevy. For many years a Mopar racer had to run a Hemi, a Max or 6 Pak car to be competitive with a big block, all expensive combos as well as the cars they came in, thankfully that has changed.

[Mark Yacavone]

Certainly would agree they needed some help.
Similar 389 / 400 Pontiacs are in the 325 - 330 range.
Of course, those who were around in the 60's already know and understand that.

[Bruce Fulper]

Originally Posted by Mark Yacavone

Certainly would agree they needed some help.
Similar 389 / 400 Pontiacs are in the 325 - 330 range.
Of course, those who were around in the 60's already know and understand that.

Not the '65 tri-power 389. It's still at 360 hp. Because they allowed the '62 318 hp tri-power down to 280 (H/SA) I've been requesting the '65 tri power to get within 10 hp of that. There's not enough difference in the two to shake a stick at. .007 more lift. Same carbs. 1.88 v/s 2.02 intake valve. That's it. Two years I've been trying. They won't budge on it. Don't feel real happy about building the car and giving them data for a year or two to prove it. But I gotta dream. The only '65 GTO tri power 4 speed in Stock.

[Mark Yacavone]

Originally Posted by Bruce Fulper

Not the '65 tri-power 389. It's still at 360 hp. Because they allowed the '62 318 hp tri-power down to 280 (H/SA) I've been requesting the '65 tri power to get within 10 hp of that. There's not enough difference in the two to shake a stick at. .007 more lift. Same carbs. 1.88 v/s 2.02 intake valve. That's it. Two years I've been trying. They won't budge on it. Don't feel real happy about building the car and giving them data for a year or two to prove it. But I gotta dream. The only '65 GTO tri power 4 speed in Stock.

Can't have too much variety, I guess.
Only room for Camaros now.

There's another way to go about this.
Bring it out and go slow. No heads up runs around in Div 7 now.
Love to see it.

[Billy Nees]

Originally Posted by Mark Yacavone

Can't have too much variety, I guess.
Only room for Camaros now.

And, apparently, old Mopars!

[James L Miller]

Originally Posted by Billy Nees

And, apparently, old Mopars!

Can someone get another intake approved for Billy? He said he had a one year only intake. I can sympathize with that. Hard to find one year only parts. Best of luck Billy.

[Chris Barnes]

We ran this combination. The carb is the tiny 525 and there is no new carb replacement, if you look at a "modern" 525 AFB you will see why. The old ones aren't common but we found a couple and sent them off to Dean Oliver, who did a magnificent job making us one bad boy race carb. NHRA allowed us to use a later model Road Runner intake manifold, which we found to be way better than the '66 piece. We ran our '66 Belvedere in H/SA. It ran mid 11's and got eaten alive by more "affluent" racers in 350 Camaros but it seemed like the combination had a lot of potential. I think the new lifter rule would help at least a little bit.

[Dwight Southerland]

Originally Posted by Bruce Fulper

Not the '65 tri-power 389. It's still at 360 hp. Because they allowed the '62 318 hp tri-power down to 280 (H/SA) I've been requesting the '65 tri power to get within 10 hp of that. There's not enough difference in the two to shake a stick at. .007 more lift. Same carbs. 1.88 v/s 2.02 intake valve. That's it. Two years I've been trying. They won't budge on it. Don't feel real happy about building the car and giving them data for a year or two to prove it. But I gotta dream. The only '65 GTO tri power 4 speed in Stock.

'66 389/335/300 is not bad. Uses the same head that was developed for the 421/376. 12.0:1 compression. 625 cfm AFB. Not a killer, but at least competitive.