Edelbrock Performer RPM
Thread Starter
Racer
Joined: Oct 2006
Posts: 269
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Edelbrock Performer RPM
Does anyone know if an Edelbrock Performer RPM intake manifold will fit under a stock 1977 hood? I saw a posting from a member that said it fit in his 77 but Summit says it won't. I want the RPM because I intend to replace my stock L48 with a crate next year. Until then I want change the intake and covert to headers and true duals.
Thanks
Thanks
Le Mans Master
Joined: Jan 2006
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From: GA "When I grow up, I'm gonna get a Trans Am and run from the cops". Direct quote from my 4yo son.
I have an '80 with the medium rise hood that they used from '73-79 or something like that and I am using the performer rpm with a Holley 600 and it fits. I am also using a Summit drop base air cleaner with the reusable filter. No problems.
Thread Starter
Racer
Joined: Oct 2006
Posts: 269
Likes: 7
Thanks for the reply. I read somewhere that the RPM is 1 inch higher than the standard Performer manifold. I have seen K&N air cleaners that have a 1 1/4 inch dropbase. Did you use a drop base? If so which one? I have the stock Qjet.
Le Mans Master
Joined: Jan 2006
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From: GA "When I grow up, I'm gonna get a Trans Am and run from the cops". Direct quote from my 4yo son.
Here's a picture of the one I'm using. Not sure if it will fit the q jet or not. Summit could tell you I'm sure.
Le Mans Master
Joined: Jan 2006
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From: GA "When I grow up, I'm gonna get a Trans Am and run from the cops". Direct quote from my 4yo son.
If you are using standard heads everything should bolt on up. I'm using Vortec heads and have had to improvise a few things for the moment. The bolt pattern for an intake for the vortec heads has the bolts going straight down. The a/c brace won't work, I made a bushing for the alternator bracket to mount it from the front and the vacuum diaphram at the back of the motor I have mounted to a plate I made. That will change as soon as I can fabricate something that will work a little better.
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Safety Car
Joined: Dec 2004
Posts: 4,071
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From: San Diego CA
Can't use the stock air cleaner if you go to the RPM, basically. Did the L48 have the L-82 intake in '77? I'm not 100% sure, but I'm betting not. So basically I'd say there'd be no real loss by going with an aftermarket air cleaner in a '77. I know the '79 - '81 all had the L-82 ram air system so it'd be non-beneficial to go to an aftermarket air cleaner for those, in my opinion.
Burning Brakes
Joined: Sep 2005
Posts: 832
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From: Sarasota Florida
i don't know how much different the rpm is from the standard performer, but i just put the performer in my 77 l-48 with an l-82 engine. i also put a performer 750 cfm carb on it too, and with a 4" air cleaner it's mighty close. if you use the q-jet, you need an adapter plate, so i am assuming it won't work, but then again i am not sure.
hope this helps
hope this helps
Thread Starter
Racer
Joined: Oct 2006
Posts: 269
Likes: 7
Originally Posted by 69camfrk
If you are using standard heads everything should bolt on up. I'm using Vortec heads and have had to improvise a few things for the moment. The bolt pattern for an intake for the vortec heads has the bolts going straight down. The a/c brace won't work, I made a bushing for the alternator bracket to mount it from the front and the vacuum diaphram at the back of the motor I have mounted to a plate I made. That will change as soon as I can fabricate something that will work a little better.
From your photo it looks like you removed emissions. Can you give me some tips?
Since the stock heads will now be the limiting factor is there any real benefit to installing the Performer RPM instead of the standard Performer? I don't want to create problems if there is no real benefit.
I havent yet decided if I will buildup the L48 or replace it. I first want to see how it reacts to these changes. I will then determine if it is strong enough to warrant a rebuild. I was considering vortec but that would mean a complete top end change and I was not ready for that just yet. BTW how is performance after the switch to vortec?
