What Happens When..............

[vortecpro]

That q jet intake works well to 5000 rpm and even better with plenum mods. Porting the heads, if you get in the 300s plus in flow that baby cam I think will get you in the mid 400s hp range I'd think. So maybe 11s in the quarter?

The dyno data. I say 11s in Denver, we will find out...............Ready to race.

[motormonkey]

I like it. You put together a nice build.
What did the heads flow if you don't mind sharing.

[vortecpro]

I like it. You put together a nice build.
What did the heads flow if you don't mind sharing.

Thanks, head flow @ 28 inches 4.350 bore SF 600 820 casting

.200 159 Ok
.300 224 Weak
.400 272. Weak
.460 292 ?
.500 306 Good

[Papastoy1]

Very nice!
Which of the 2 Q-Jets did you use to get your numbers?

[vortecpro]

Very nice!
Which of the 2 Q-Jets did you use to get your numbers?

I ran 2 different carbs

1. Harold Bettes carb for my Buick stocker
2. New Harold Bettes carb for my Buick stocker
3. Vintage Muscle Car carb for my Buick stocker

Carb 1 and 3 ran about the same on the dyno, although carb 1 is definitely proven at the track. Both carbs flow in the 890 CFM range. My Buick ran 11.60 in Denver in a 23.78 baro @ 3650, I pulled the worn out engine out and put it on the dyno, it made 512 HP corrected and 372 HP observed uncorrected, right after this race in Denver which I qualified # 5 in the stock/super stock combo. My 427 above made in the 360s for observed HP, My Chevelle is a better car than my Buick, I think it will run 11.70s in Denver.

[Carnut1]

Love this build, made even more steam than I was expecting. Looks stock but rocks! Nice job.

[vortecpro]

Love this build, made even more steam than I was expecting. Looks stock but rocks! Nice job.

Thanks-your even going to like the drag test better.................

[Carnut1]

Screenshot_2018-10-11-12-48-39~3.png

This project reminds me of one I did in the mid-late 80's. 1965 Impala ss 300hp 327. Full rebuild on a budget, one step warmer cam and fully ported fuelies. Completely different attitude. Good times.

[Mr.L-88]

You are absolutely correct, I had my cam grinder copy the factory cam on a 1960s cam core and I had him change LC to 112. I used 1970s NOS TRW hyd lifters. I did use 2 inch headers.

I understand the intent of this test; but I have to wonder what kind of performance you could get with a modern lobe or possibly hydraulic roller with smooth idle characteristics. I like nothing better than a stock looking engine that can clean clocks.

[vortecpro]

This is where the rubber meets the road, smooth idle 427 track test Saturday.............

[In-Tech]

Beautiful '68
Curious what all you did to the suspension too.

[vortecpro]

You are absolutely correct, I had my cam grinder copy the factory cam on a 1960s cam core and I had him change LC to 112. I used 1970s NOS TRW hyd lifters. I did use 2 inch headers.

I understand the intent of this test; but I have to wonder what kind of performance you could get with a modern lobe or possibly hydraulic roller with smooth idle characteristics. I like nothing better than a stock looking engine that can clean clocks.

Wonder what it would do with a stock eliminator cam, maybe 580 HP?

[Mr.L-88]

That stock eliminator cam would be a great question as well. I was just thinking street sleeper with my original question/comment.

[Bob Hollinshead]

Mark, what are you running for a fuel system? do you use that cool can?

[In-Tech]

Warm fuei, cold air... nuff said