Who's ported

[HOTSIX]

How many of us here have experience with porting their heads and / or intake ?

I want to do mine but want some info on how it affects driveability, idle, response etc.

I have a pal that has much experience in porting and he says too much is no good...but how much is too much on this 85 intake ?

Its gonna be too much for me to buy intake and heads from the USA and have 'um shipped up already done....so I might be doing my own....

I was suggested to clean up (remove rough casting etc) the runners, gasket / port match the intake + heads, do some bowl work on the heads and see where that gets me.

How much to remove ? Where to remove ?

What you guys think ? Anyone done it ?

 

[EyeTalk2Trees]

In a previous job I worked together with a bunch of engine builders and head porters on engines for dyno research. I asked the head porter the same question and he said, for the street you just need to clean everything up(as yousaid) smooth out the casting spots in the runners and in the bowls, try not to take off much in the chamber area, just polish theren so it won't screw with your cc in different cylinders. In the runners what is important is velocity, so smooth everything out and match them to the gaskets. If you match the heads to the gaskets its a waist of time unless you match the intake aswell. When you are porting just keep thinking smooth, not bigger. He also said the exhaust side is more inportant that the intake side, but he did most of his work on 700-800hp SBCs, pro-stock and pro-truck drag engines. Every engine design is alittle different.

When i ported my Dart heads for my Z28, I looked at a set of AL Air flow research heads(very popular in the SBC world, very powerful) and the side of the runners where not very big, infact they were slighly smaller than other aftermarket heads, but these AFR heads made much more power. The flow charts showed the AFR heads had a much higher velocity that other heads (their runners where slighly tweaked in design). SO i just tried to smooth every ruff edge that the air/fuel would touch. They are a really nice set of heads.

goo luck, if its your first time, pratice on a set of junk heads (any brand) for a runner or two untill you get it down. Be patient!!!

 

[HOTSIX]

Hey thanks...good idea to practice it.

I think i'll just clean um up a bit then see....anyone else ????

Whats everyone doing when they port ?
Hogging out too much will screw with the car for sure...