While researching for an intake maifold to replace my 72 OE SB cast iron one. I found one that should work good.

The challenge is to find a manifold that:
Is an aluminum dual plane
Will fit under the stock 72 hood
Has larger ports than stock
Will fit aftermarket heads with 1.19 X 1.99 ports
Will support a 383 build up
And accomodate a Q-Jet or a square bore base carb

Results
Performer - ports 1.14" X 1.88" Height OK
Weiand - ports 1.12" X 1.84" Height OK
Proffessional products Cylone - ports 1.19 X 1.90 Height OK

So the Professional products appears to be the best match. A little port matching and should work out great and meet the challenge.
The fun part is these are really cheap compared to the other brands. I have seen cast/satin finish under $100, polished @ $125 and chrome $160
As we alll know hood clearance is the issue. More room would make more choices available for sure: Performer RPM, Air Gaps, Weiand Action Plus, PP Cyclone Plus, Crosswinds etc....
Mark

 

You didn't mention your engine combo and gearing. So its hard to tell if a single plane would work. But for dual planes i think Edelbrock has the latest tech improvements. And i do like thier Air-Gap manifolds - well maybe since i'm running a polished Air-Gap Performer that fits great under my '74 hood.

BTW plenty of boneyard alum intakes on late 70's and early 80's Camaros, Firebirds, and other GM models with the 350" corporate motor and the Qjet spreadbore. I even found an old Holley made Duntov "Z" single plan at a swapmeet and bought it for only pocket change - kinda want to clean it up and run just for the bragg'n rights. Found matching corvette number alum intakes to cheap to pass up at the swapmeets.

Hard to choose 1 until u can try it - heck try a few.
Good luck

 

Thanks Cardo0
Need a dual plane for sure, building a low spinning torquer type engine, 308 rear with a TH400 and being a 72. Hood clearance is an issue so my choices are limited....Mark

 

I've got the PP Cyclone on top of a set of vortec heads and can say it does fit with the stock air cleaner, but it's a little tight. I have to set the hood down gently then lean on each side to get it latched. The cyclone looks pretty much just like an Edelbrock copy so I'd imagine the performance is almost exactly the same on them.

 

thank Kalway...hope you're doing better now...followed your posts on your recent accident. Are you about finished with the bikes???
Mark

 

Mark

81 has more clearance than your 72.
Get the previous 2101 which has the Edelbrock logo directly behind the thermostat housing on the valley cover, rather than on the passenger side runner as on the current design.

 

So would the Professional Products manifold yield a little better performance with the larger ports, or would Edelbrock have the better performance with newer technology (assuming they have newer technology)?

 

If your 72 is a 4 speed car or your building a 383 I would go with a HVH 1016 intake from Brodix. The manifold will clear a SB hood and make good power, better than any you have listed, Pro Products are made in China if that makes a difference to anyone, it does to me!

 

Hi Mark:
I bought a polished Pro Products Crosswind. It's an RPM Airgap clone. The ports were the biggest I found in a dual plane, and matched my AFR 210's near perfectly. The Edelbrock didn't come close, and would have needed porting. I'm impressed with the casting, polishing, machine work, (threads) fit and quality for the price. ($169.) Graham Hansen, author of "Building Big Inch Small Blocks" tested numerous manifolds on a dyno, and had very good things to say about Pro Products. In fact, it beat the RPM Airgap by a few HP. The Crosswind however is too tall for your application. Go with the Cyclone...
Here's mine during a mock up...
www.imagesup.com/usr/79/100_0082.jpg
Eddie

 

Still quite soar and my left heel is still swollen. You can tell by looking at it next to my right heel, it's pretty freaking big. I haven't worn shoes much for the past two weeks because they're really difficult to put on and rather painful when they are. I wouldn't say I'm finished with bikes but it'll definitely be awhile before I get another one. I'm gonna probably either get a new Pontiac, new Saturn, or used Caddy for a daily driver after everything is said and done.

 

Since they are copys of Edelbrock, they don't even need a dyno, just copy & slightly change. The dim. above are the claimed specs. for the port openings not port size. Typically a hotrodder would port match the openings to the heads.

 

Exactly...hopefully because PP port opening are a little bigger won't have as much material to remove...

 

Ganey I have a EB Performer I bought used on Ebay a while back and the logo IS behind the t-stat housing and NOT on the passenger side runner,
Are the runners or openings bigger? What's up with this intake?
thanks
Mark

 

Traditionally the hotrodders favorite street SB intake has been the high rise LT-1 or Holley's version the 300-36 Street Dominator.

So when the Performer 2101 & Action+ came out, in general we ignored them as they were to improve on low rise intakes which we didn't run. Comments on the 2101 on the forum sounded like different manifolds were being discussed- i.e. more than 1 2101.
I commented on this privately to another knowledgeable hotrodder forum member a long time ago.

Early or 1st 2101 & Action+ & later stock intakes are similar in appearance regarding runner shape. The Action+ was a little better than the 1st 2101.

A significant improvement was made on the 2nd 2101 Performer & Chevy's bow tie intake which Chevy said was as good as the high rise.
This shows the 2nd 2101 Performer (Chevy's bow tie intake is similar w/ Chevy logo in same place as Edelbrock logo) compared to the Victor Jr.
http://ganeys.home.sprynet.com/VicJrPerf.JPG
Notice the change in runner shape compared to stock type.

The 2101 was changed again to the current or 3rd 2101.
There are racing classes that allow only the current 2101- previous 2101 is illegal.

Confirmation from Edelbrock Tech on 2101 "There were three official versions, ... The early versions weren't necessarily 'better,' but they were tuned for better top end performance while our current generation produces more street friendly low end torque."

Note: Some may be able to add to this as I have no real interest in the low rise intakes except to help those w/ very low hoods.

 

Thanks Ganey for all your info. I am always amazed at the resources out there.....Mark