For what it's worth, the Weiand intakes we tested are really old designs. The company is currently revamping most of its intakes, and the Chevy stuff we've seen from them so far is really good.

DF

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Have the fixed their narley casting?

Yes.

I was at the old Weiand foundry once. Wow. Lots of legacy there.

DF

One thing that is tough (impossible?) to test on the dyno is the throttle response. I suppose the shape of the torque curve gives an indication but it isn't he whole story. The big single planes can make good torque on the dyno but sometimes on the street they have a hole in the throttle response. I've found that the Performer RPM really works on the street even if it gives up a few ponies on the top end. I bet the factory six pack setup also works great on a mild motor.

I did a manifold test for PHR a few years back where we tested the Performer RPM against the Victor 383 on my low deck 470 motor. The Victor made a couple of more hp than the RPM on the chassis dyno but it was a dog compared to the RPM in the "punch from a roll" test. The RPM would smoke the tires at will while the Victor had a bit of a bog.

One thing I want to do is to try to run a Dominator on my street car with a dual plane intake. I want to see if I can actually tune a Dominator to work at part throttle and still make the power on the top end. I wish someone made a BB Mopar intake that was dual plane with a 4500 flange but nobody does. I always liked that old C454 intake that Edelbrock made for the BBC motor.

The Offy 360 we tested had a 4500 flange. Obviously, the 4500 carb offers no advantage that the intake itself can't tear down.

DF

i have the rpm on my 383 now. i am about to start spraying it though. wont i see a better gain using a single plane like the M1.

People tell you not to use a dual-plane with nitrous, mostly due to cylinder-to-cylinder distribution issues. Me, I've run 150-175hp shots through a lot of dual-planes with no issue. More hp than that and I'd start to pay a lot more attnention.

DF

Do you have any numbers on a stock 4 barrel 383 intake?

Perfect timing, David; this is just the thing to make you go on the "magazine" thread. Still lots of useful stuff going on, obviously.
We also had a recent thread on the viability of a six pack on a stroker LA, so although we can't make direct comparisons, this is interesting in that context as well.

I look forward to buying the mag and reading the rest of the article. Good work.


Dave

well i called the big loser right on , but thats only going off info i read on the internet ..

i'm impressed wit hthe numbers from the DP4B , i'm glad i recently bought another one .

Thanks for all the compliments on my street car. I have alot of fun driving it.

I wanted the drug out of a barn vintage drag car look.

Thanks again guys.

Maybe I will send some photos into a magazine.

Good thread. I just recently picked up a DP4B and I'm going to run it on my 70-Bee with a 383/4spd combo. I hope the Comp. XE274 isn't too much for a mild build with stock exhaust.

any opinions on that?

Dave - Can you provide the torque and HP curves vs RPM for the different intakes?
Thanks,
Ron

They all made peak torque around 4,000 and peak hp around 5,900. Sorry, I can't type 15 different full curves onto the message board. Maybe one or two. What are you interested in?

DF

i was glad to see the performer post good numbers.it gets alot of bashing but shows to be a good intake for a street 383.
the street dominator did'nt carry the torch so well compared to it's rb sibling.

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

From the Street Dominator to the Six Pack there is a difference of 7 #s of torque and 4 HP

Like anyone will notice that seat of the pants on the street - Sounds like all good intakes on average

However what makes the most HP and Torque say around 5500 - 5800 or even 6000 rpms were most of us might shift gears on our street 383 motors ???

I bet the Street Dominator is close to the top

I would like to see exact #s down low and exact #s at 5500 6000

Thats the great thing about the Street Dominator
Decent #s down low for a single plane(Right there on average with the best dual planes)but it really shines on top i bet say 5500 - 6000 rpms

Scott

THANX FOR ALL THE GREAT INFO - GOOD JOB BY THE WAY !!!