1.Edelbrock RPM for best average power and torque
2. MP M1 close second place

Freiberger, thanks for turning Car Craft around, you have a knack for the average hot rodder's way of thinking. don't lose that quest for real info as you move up the ladder.

I think with the engine you built the RPM should be at the top of the heap, along with the 6-pack. Possibly the newest Weiand Stealth if that's what you had.

My "long-term stroker" 451 gets a Torker 383 because it was $50 and almost new.

I am interested in the dual-port as I have one collecting dust. How about a dyno test at half-throttle with BSFC numbers for the D-P, Performer and RPM.
R.

Updating my guesses also #4- 6 pak. I am also VERY interested in the outcome of this. My RPM seemed to have much more bottom end than the torker. I am dying to find out how the Offy Low rise dual quad performed. I love the looks of them and if it faired well just might look into buying one ! And 1ofnone I love the looks of your car too ! It looks killer, right out of a 60's magazine. Very,very NICE ,Dave.

My guess is #1 Victor #2 TeamG - for HP
RPM or Holley SD for best TQ.

Torker 383 here too, cuz it was FREE!

Wondering what the numbers were tho. Cuz my 383 moder is very similar with less compression / cam.

The obvious answer is the RPM....as it's been proven over and over. I am thinking we may get a surprise here! The SD works well on the RB's, but I don't think the 383 will like it as much. I'll say the M-1 was the worst, and still go with the RPM as being the best overall.

The last one similar to that I ran the Torker. I think the carb is a bit large INO for that setup tho. I think the dual quad intakes would help that, and I'll put the overall average TQ and Hp on the 6bbl, then the RPM, then the Torker. I dont believe the SD B version is as good as the RB, and the M1 IMO is flat too large, especially with that carb, to make a good average when it's done by 6K. I'm curious how the Weiand Ation Plus did. I've never run them. I always thought they looked too much like factory to work well. but I know a few others that like them. I never liked the TM series Edelbrocks. That last hook in the port by the bolts I never liked...lol. So, how many months do we have to wait to get results?

I'm looking at the cam they used and thinking in a 383 with that cam a single planes gonna make the top of the list. Where do you guys think the peak RPM/horsepowers gonna fall with that combo? Driveability and average #s might well be with the Perf. RPM, but I would think the M1 or Weiand single planes got an advantage peak wise over even the RPM. Don't know a thing about the Victor for 383, but if the one I ran on my sb Chevy years back is an indicator, the Victor likes it way up rpm wise over most all those other intakes. Might be a bit much for that setup.

1st- Edelbrock Six Pack
2nd- Edelbrock Performer RPM
3rd- Holley Street Dominator
Worst- Offy Dual-Port Or Edelbrock Performer
What do I run? My 383 runs a Performer RPM

EDIT: Haha I was right on the first two

We have a winner: "I'll put the overall average TQ and Hp on the 6bbl, then the RPM, then the Torker."

Here's what our test showed. Each test is an average of two dyno pulls to remove anomolies. The numbers shown represent average power from 2,500 to 6,000 rpm. However, even averages do not tell the entire story. For example, the Torker and the RPM have the same average numbers, but they are not the same: the power curves cross at 3,900 rpm, with the Torker making more high-end and the RPM making more low end.

As for peak power, the Torker, Street Dominator, M1, and Victor were all at 455-456 hp at 5,900 rpm.

Nearly every manifold made 450-460 lb-ft at 3,800-4,100 rpm. Most of the dual-planes were way stronger than most of the single planes at rpm points below peak torque. Duh.

I think the tunnel ram would have done a lot better as a dual quad. I was surprised how well the Six Pack did, but I think that's because of this engine's low-rpm and low displacement. Six Packs have killed big power in other tests with other more radical engines.

That just proves that you really have to consider the test before you can make a judgement call, and you can't just look at one point of data and say "that's best" overall. It will also be interesting to see how this may change when we put better heads on the engine. If the 906 heads are currently the restriction, then other weak points in the intakes will be revealed with better heads.

More data in the December issue of HRM.

2500-6000 AVG
INTAKE LB-FT HP
Six Pack 428 348
Torker 427 348
Perf RPM 425 346
Victor 383 425 346
M1 single 424 345
1x4 tr 425 346
TM6 424 345
DP4B 424 344
Performer 422 341
Action Plus 421 341
Street Dom 421 344
Team G 409 334
Offy 360 406 338
Offy 2x4 408 330
Offy DP 404 327

Looks like weiand and offy need to spend some money and re-engineer their products!

thats good news for me. Im running very close to the same setup that you are and just switched from the RPM to the six pack.
I look forward to your tests with the heads done because thats next on my list.
Thanks for a good thread.

Isn't the DP4B an aluminum version of stock or I am mistaken or confusing it with something else? If it is I wonder what a stock one would do?

OK...but if you look at what you can do with your mill for the old "bang for the buck" premise, a 4bbl on top of the RPM is WINNER IMHO.

Yep. For street/strip, the RPM is almost always a "can't go wrong" choice.

DF