socal79

Hello all I'm looking for some advice on which intake manifold to purchase. I have an edelbrock performer but I realized I need to port my intake to match my ported heads.(I bought the intake first) so I have a 79 l82 car with a 383 stroker installed and a 268h comp cam. Any ideas on what intake would be best for max power? I don't want to waste the money porting the base model edelbrock this is why I want a better intake to port. Thanks in advance.

boltnut

You are probably talking more about gasket matching than porting. What is the rpm range of your cam ? That will tell you which intake you need. What rpm does it max out at ? If this is a street driven car only I am sure you would be better off with a dual plane that is from idle to as high as you need....not a racing manifold. You can easily gasket match the intake to your heads at home with simple tools.

socal79

The cams range is from 1500-5500rpm. I do need porting the intake port on the cylinder head is about 1/4inch larger in length than the intake manifolds ports. I have the larger race port intake gasket but it would be a waste to use the regular intake and not take advantage of the cylinder head porting.

boltnut

You should be able to line up the gaskets and mark the intake and use simple grinding tools to enlarge the ports.....that is if there is enuf meat on the flange.

Isn't 1500 to 5500 edelbrock performer range.....or is that the performer RPM ?

jackson

tell us exactly which head you have? ... model, p/n & mfg?

1/4" more height (taller port) is a lot

imho ... intake port-gasket matching for a 268 cammed street 383 is an excercise in futility.

boltnut

Maybe so but there is nothing wrong with cleaning up the raw edelbrock casting a little to match the gasket. Even if it just makes you feel better. Even the water port can be smoothed a little.

socal79

The heads are pro comp 210cc I believe the part number is 3003A. They were fully CnCed by my local shop. The shop offered to port match my intake I just need help picking one out. I like the air gap performer for a bit more power

pauldana

first off, if you are in California, Valley head service in Chatsworth did my porting polishing and port matching, they also do Gkull's work as he has told me, and it is port matching you are talking about... the RPM intake will run fine with that cam, I run that manifold on my 383 and run 430tq and 440hp at the rear wheels.. but your heads will hold you back, you wont get that power out of procomps, sorry, i dont care what you do to them. do a search on the web.

socal79

So does anyone have experience on what would make more power and fit? Performer rpm, air gap, or rpm air gap?

SteveG75

Go with the RPM Air Gap (will need a drop base air cleaner). Same height as an RPM so might as well get the Air Gap benefits.

Also, ignore Edelbrocks rpm recommendations. Those are based on a 350 engine size. Same with most cam recommendations. The 268 is a mild cam in a 350. You could easily step up to a 280 in a 383. Cubic inches will make the cam act smaller.

Vette5.5

The Edelbrock Perfomer dual plane your running is a very good choice for the street rpm's you described, as makes torque everywhere. Port/gasket matching really isnt a big deal with a basic Dremel tool. As mentioned, really not wanting to smooth the intake ports in to far on a street motor, as the rough casting actually helps with fuel atomization. Not a bad idea having some JB Weld 2 part epoxy handy when doing this work, if the Dremel gets loose, scuffing up the intake flange surface.

boltnut

oh yeah. i had a street car with 310cfm heads and ported intake....did not like to idle at all. she just wanted to RUN.