intake manifold swap
Thread Starter
Racer
Joined: Feb 2012
Posts: 421
Likes: 27
From: Harrisburg PA
intake manifold swap
I would like to "simplify" the look of my '77 under the hood.
I am considering an intake swap to eliminate the EGR and get a bit more performance (a new carb may go along with the new intake as well)...
I know I need vacuum ports for the brakes, the transmission, and the headlights. What else would I need vacuum fittings for (that runs on vacuum)?
I am considering an intake swap to eliminate the EGR and get a bit more performance (a new carb may go along with the new intake as well)...
I know I need vacuum ports for the brakes, the transmission, and the headlights. What else would I need vacuum fittings for (that runs on vacuum)?
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
I would like to "simplify" the look of my '77 under the hood.
I am considering an intake swap to eliminate the EGR and get a bit more performance (a new carb may go along with the new intake as well)...
I know I need vacuum ports for the brakes, the transmission, and the headlights. What else would I need vacuum fittings for (that runs on vacuum)?
I am considering an intake swap to eliminate the EGR and get a bit more performance (a new carb may go along with the new intake as well)...
I know I need vacuum ports for the brakes, the transmission, and the headlights. What else would I need vacuum fittings for (that runs on vacuum)?
Last edited by REELAV8R; Oct 21, 2013 at 07:42 PM.
Thread Starter
Racer
Joined: Feb 2012
Posts: 421
Likes: 27
From: Harrisburg PA
I have always been a Holley Guy (on my '67 Camaro)...but I can see the benefits of the Q-jet that is on the Vette as it is...very smooth start and great throttle response...
I am not familiar with the "smog stuff" as my other car never had it to contend with!
Any hood clearance problems with the new intake...leaning toward the 2101...still possible to go with a square bore and a Holley 650DP I have on the shelf...
I am not familiar with the "smog stuff" as my other car never had it to contend with!
Any hood clearance problems with the new intake...leaning toward the 2101...still possible to go with a square bore and a Holley 650DP I have on the shelf...
Melting Slicks
Joined: Jul 2010
Posts: 2,503
Likes: 33
From: McGrady NC
St. Jude Donor '15-'16
All vacuum comes off the carb except for one fitting that connect to the headlights, etc. and to the auto transmission depending on which one you have. It is the one between the distributor and the carb. Just reuse it on the replacement manifold.
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Thread Starter
Racer
Joined: Feb 2012
Posts: 421
Likes: 27
From: Harrisburg PA
Is the intake on the '77 aluminum or cast iron?
Could I just buy an EGR block off plate, and call it good?
Also, not sure if the intake is original (it sure looks liek it), but it has the intake runners numbered--is that legit on a GM intake?
Could I just buy an EGR block off plate, and call it good?
Also, not sure if the intake is original (it sure looks liek it), but it has the intake runners numbered--is that legit on a GM intake?
Melting Slicks
Joined: Jul 2010
Posts: 2,503
Likes: 33
From: McGrady NC
St. Jude Donor '15-'16
The right Performer will have not have the provisions for EGR. You could also get a block-off plate for your original intake. GM did use numbered runners, but not on all intakes. Not sure when that started.