Ok, I'm putting a 355 in my car soon and I'm going to port the plenum out! I was also thinking about porting the intake!! I've heard of some people doing it and I've also read that the material is already too thin to port!! Personally, I don't have the $409 to buy an aftermarket intake!! Edelbrock appears to be the cheapest one I've found at $409!! Does anyone think the stock intake can be ported??

 

Yes, you can port the stock intake. There's plenty material to remove. Theres a post abou someone who siamesed the intake and got some good hp gains on the dyno.


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Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/relocated MAT/ AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

Do you know where the post is at and whether or not there's a picture on there???

 

https://www.thirdgen.org/messgboard/...ML/001492.html

Yes there is a pic. In fact, there are 2. Plus the dyno sheets.

 

thanks!

 

86,

If you don't want to get as radical as Max, you can look at these directions:

Plenum Porting.pdf

Personally, I think Max is on to something good for a manifold/base design. A little more tuning and some real track times over a longer period will probably sell me completely.

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Later,
Vader
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