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Best Intake for a Street 383 #44230
08/27/07 09:21 PM
08/27/07 09:21 PM
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Los Angeles, CA
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OK, I'm cheating here because I know the answer. Even so, I'd like to sort of gather some opinions in order to help me formulate an article I'm about to write.

Here's the deal: We built a 383 at 0.060 over, stock bottom end, Diamond custom pistons for 10.3:1 compression, bone stock 906 heads, and a custom Comp MM solid flat cam that's like 237/242 at 0.050 on a 110. I'll tell you that the engine makes in the range of 450 lb-ft and 450 hp all under 6,000 rpm.

We tested 15 intake manifolds, altering jets on each one for optimum power. Here are the intakes we ran. The carb was an 830-cfm Holley except for the Offy 4500 intake that used a King Demon, the Six Pack that used 440 Six Pack carbs, and the dual-quad that used Edelbrock 500s:

Edelbrock DP4B
Edelbrock Performer
Edelbrock Performer RPM
Edelbrock Torker
Edelbrock TM6
Edelbrock Victor
Edelbrock Six Pack
Weiand Team G single-plane
Weiand Action Plus dual plane
Weiand single-quad tunnel ram
Offy Dual-Port
Offy 360 for 4500 carb
Offy low-rise dual quad
Mopar Performance M1 single-plane
Holley Street Dominator

Which intake "won"? Which one sucked the most? Which one do YOU run?

DF

Re: Best Intake for a Street 383 [Re: Freiburger] #44231
08/27/07 09:23 PM
08/27/07 09:23 PM
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JohnRR Offline
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i'll say its a tossup between the offyful duo port and the M1 dual plane as the WORST .


Re: Best Intake for a Street 383 [Re: JohnRR] #44232
08/27/07 09:25 PM
08/27/07 09:25 PM
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The M1 was a single-plane.

Re: Best Intake for a Street 383 [Re: Freiburger] #44233
08/27/07 09:27 PM
08/27/07 09:27 PM
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JohnRR Offline
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Quote:

The M1 was a single-plane.




someday i will understand what i am reading ...

offyful duoport was bottom of the foodchain

Re: Best Intake for a Street 383 [Re: Freiburger] #44234
08/27/07 09:29 PM
08/27/07 09:29 PM
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Atco NJ
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single 4 bbl t ram?
low rise dual quads?

no offence but after reading your last dyno session with a t-ram and not tuning it correctly ( right carbs ) i thought you would have at least gave it another go and tried.. i bet a dual quad t-ram would have beat or held its own against the competition...provided ya did your homework this time...


Re: Best Intake for a Street 383 [Re: DJVCuda] #44235
08/27/07 09:31 PM
08/27/07 09:31 PM
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Please either derail the conversation or PM and let me know what tunnel ram foul-up you're talking about.

We'll run all the big dual-quads when we step up the cam and heads on this thing.

DF

Re: Best Intake for a Street 383 [Re: Freiburger] #44236
08/27/07 09:32 PM
08/27/07 09:32 PM
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Atco NJ
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not trying to derail....
go about your buisness...

Re: Best Intake for a Street 383 [Re: DJVCuda] #44237
08/27/07 09:33 PM
08/27/07 09:33 PM
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Los Angeles, CA
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No, really...I'm curious. No offence intended or taken.

DF

Re: Best Intake for a Street 383 [Re: Freiburger] #44238
08/27/07 09:39 PM
08/27/07 09:39 PM
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Atco NJ
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PM sent...

as for my guess for what you have...

tm-6 has to be up there... as far as peak numbers. they always ran good.

Re: Best Intake for a Street 383 [Re: Freiburger] #44239
08/27/07 09:41 PM
08/27/07 09:41 PM
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Re: Best Intake for a Street 383 [Re: Freiburger] #44240
08/27/07 09:44 PM
08/27/07 09:44 PM
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Smithville .Ontario,Canada
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fastback383 Offline
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Edelbrock Performer RPM #1 (I'm using 1)
Holley Street Dominator #2
Weiand Team G Single Plane #3


Re: Best Intake for a Street 383 [Re: fastback383] #44241
08/27/07 09:49 PM
08/27/07 09:49 PM
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Thanks, fastback383.

BTW, I'll give the answers after some more guys post. I still want to see what people's bench-racing impressions are, though.

DF

Re: Best Intake for a Street 383 [Re: Freiburger] #44242
08/27/07 09:52 PM
08/27/07 09:52 PM
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JohnRR Offline
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i can't say what the best is , but my choice is the Performer rpm if hood clearance is not an issue , the DP4B if i am restricted by a stock air grabber/ramcharger setup .

i do know of one engine build where the RPM was worth 50HP over a stock cast iron unit .

Re: Best Intake for a Street 383 [Re: JohnRR] #44243
08/27/07 09:56 PM
08/27/07 09:56 PM

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I'd choose the RPM as well with that combo, but I'm more than a little curious to see how the 6 pack setup did, which no one has mentioned as yet to the good or to the bad.

Re: Best Intake for a Street 383 [Re: Freiburger] #44244
08/27/07 09:57 PM
08/27/07 09:57 PM
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' Hope it's the Holley as that's what I'm stuck with now.
Would an STR fit either test mix?

Re: Best Intake for a Street 383 [Re: bacaruda] #44245
08/27/07 10:01 PM
08/27/07 10:01 PM
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STR with inline dual quads is coming in the next round. I plan to test it with both small and big cams and see if I can make it work on the street.

BTW, has anyone ever seen a Weiand Six Pack crossram for a low-deck? I have a 440 one but have never located a B-motor version.

Re: Best Intake for a Street 383 [Re: Freiburger] #44246
08/27/07 10:02 PM
08/27/07 10:02 PM
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Define "won"

Re: Best Intake for a Street 383 [Re: bacaruda] #44247
08/27/07 10:03 PM
08/27/07 10:03 PM
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I would (and did) choose the Performer RPM for my street 383, but I am not sure what "BEST" is -- average power/torque #?

Re: Best Intake for a Street 383 [Re: BSB67] #44248
08/27/07 10:05 PM
08/27/07 10:05 PM
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Quote:

Define "won"




Well, I sort of left it open to interpretation, which is why it's in quotes. Take your pick: best peak torque, best peak hp, or best average lb-ft or hp. Name it.

DF

Re: Best Intake for a Street 383 [Re: fastback383] #44249
08/27/07 10:09 PM
08/27/07 10:09 PM
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Val-haul-ass... eventually
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From the combination described above:
Edelbrock Performer RPM....#1
Edelbrock Six Pack..........#2 (maybe even #1...)
Holley Street Dominator....#3

My experience w/ the old Torker intake on a mild 383 combination many years ago was pretty surprising, too. Even though it was a single-plane, it still ran waaay better than the OEM cast-iron dual-plane intake it replaced. I'll be curious how well it compared.

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