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Old 12-15-2010, 07:07 PM
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pontiac intake choice.

Well a friend of mine is going to let me have an aluminum intake, he has like 10 or something.

and im sure hes got a ton of different variations.

what would best suit a street motor, dual plane, single plane, etc? motor is a 455, RA IV cam, Q-jet carb, 9.2:1 compression.

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Old 12-15-2010, 09:47 PM
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dual plane

Jim Hand ran some flow numbers with various styles of intakes for these pontiacs, his numbers showed that only the Edelbrock Performer out flowed the stock cast iron intake. I cant remember what year/spec intake it was, but it was an older one (pre-70). Just thought i would throw that out there.
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Old 12-15-2010, 10:02 PM
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Quote:
Originally Posted by BigRoy1978
dual plane

Jim Hand ran some flow numbers with various styles of intakes for these pontiacs, his numbers showed that only the Edelbrock Performer out flowed the stock cast iron intake. I cant remember what year/spec intake it was, but it was an older one (pre-70). Just thought i would throw that out there.
The intake ive got right now is a cast iron 4bbl one, but its before they had the extension for the exhaust crossover
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Old 12-15-2010, 10:31 PM
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Quote:
Originally Posted by AndersonRacing44
The intake ive got right now is a cast iron 4bbl one, but its before they had the extension for the exhaust crossover
I don't know what exhaust cross-over extension that you are talking about, but all factory 4bbl manifolds perform pretty good. Of the aftermarket aluminum manifolds, the Performer performs about as good as any stock cast iron, but with a Performer RPM there is a noticable improvement and it is street friendly.
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Old 12-15-2010, 11:43 PM
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I'm running an aluminum dual plane from Procomp rated at 1500-6500rpm because it matched my ram air IV cam range. The edelbrock rpm will be very good choice too. The procomp was shaped like an "X" and seemed to have more air run around the runners to keep it cooler than the rpm, also had nitrous bosses, and even had the secondary area under the carb notched/milled already and for a lil cheaper than the RPM so I chose that one. If your friend has an RPM I would choose that one for sure, second choice would be a performer. I doubt he would have a procomp but if he does check this out.
http://www.youtube.com/watch?v=2rYf5..._order&list=UL
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Old 12-16-2010, 12:01 AM
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http://www.youtube.com/watch?v=j48Y-8mPYMY
Runs alot better with the Qjet and the electric choke I added to it.
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Old 12-16-2010, 12:46 AM
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Quote:
Originally Posted by 1badLemans
http://www.youtube.com/watch?v=j48Y-8mPYMY
Runs alot better with the Qjet and the electric choke I added to it.
not bad man I like the car, I talked with my guy on the phone and he says he has a edlebrock preformer RPM manifold i can have. so im happy.

is the edlebrock any taller than a stock manifold? because clearances are very tight under the hood of a 72firebird.
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Old 12-16-2010, 12:59 AM
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Ya it is a lil taller. When I installed mine I had to get a 2" air filter froma 3" and it cleared. I was thinking a drop base could've done the job too since my air cleaner base is flat. I thought maybe a hillborn polished scoop sticking out of the hood would look cool but I wasn't ready to cut the hood just yet . Just make sure if you're running a Qjet that the rpm will be able to bolt up to a spread bore carb or else you will have to run an adapter that will raise it even more. I don't know about pontiacs but i've seen edelbrock rpms for chevy and some are for square bore only while others are for spread/square. Are you running a stall converter?
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Old 12-16-2010, 03:37 PM
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Quote:
Originally Posted by 1badLemans
Ya it is a lil taller. When I installed mine I had to get a 2" air filter froma 3" and it cleared. I was thinking a drop base could've done the job too since my air cleaner base is flat. I thought maybe a hillborn polished scoop sticking out of the hood would look cool but I wasn't ready to cut the hood just yet . Just make sure if you're running a Qjet that the rpm will be able to bolt up to a spread bore carb or else you will have to run an adapter that will raise it even more. I don't know about pontiacs but i've seen edelbrock rpms for chevy and some are for square bore only while others are for spread/square. Are you running a stall converter?
well right now i have a double snorkle air cleaner because they just look BA and id like to not change it. no i dont have an auto trans.
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Old 12-16-2010, 03:40 PM
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I think if you have an inch of hood clearance right now, an rpm would be fine. You should be fine with a manual trans then.
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Old 12-16-2010, 05:29 PM
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Quote:
Originally Posted by 1badLemans
I think if you have an inch of hood clearance right now, an rpm would be fine. You should be fine with a manual trans then.
haha yea i think ive got an inch or two.
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Old 12-16-2010, 06:08 PM
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the edelbrock performer rpm is a very good intake however it is taller than stock, i would do some measuring before you slam the hood
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Old 12-17-2010, 05:25 PM
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Quote:
Originally Posted by WDCreech
...with a Performer RPM there is a noticable improvement and it is street friendly.
X2.

Unless it's a misprint, Summit has the RPM™ priced @ ~$230, and the PP Crosswind @ ~$270. Jegs has the PC Qualifier Plus for ~$255.
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Old 12-17-2010, 05:31 PM
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I bought my intake off of ebay for 180 including shipping brand new. A polished version is about 205 including shipping for the procomps.
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Old 12-17-2010, 05:48 PM
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Ebay will almost always be cheaper than summit or jegs on products. I figured it was an intake and not somthing as important like bearings or pistons, rings etc. So giving the procomp intake a shot was not as much of a gamble as buying cheap no name bearings etc. No moving parts on an intake as you know. Some guy tried to convince me that buying full roller rockers from Proform for a lil cheaper than Comp roller tips was a better buy until I did some research and found how many of those blue rockers were breaking apart on engines! I say shop around for cheap deals but don't skimp on quality especially in critical areas!
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