Port matching to intake - how and why?
06-11-2011, 06:24 AM
#1
Staging Lane
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Port matching to intake - how and why? Before the days of silicon gaskets and plastic intake manifolds port matching was easy. Buy a gasket, place it on a couple of studs, spray intake port flange with black paint, grind away to match.
How can I do this with my 243's/LS6 intake? Does anyone sell paper/card gaskets for these engines?
The heads will be off the motor anyway (it's a vortec getting an upgrade) so the work will be easier to get at. Is it worth doing a bit of mild cleaning up in the port, mostly between where the machining ends and the casting carries on?
Even if it only adds a few horses or 1/2 a mpg I don't mind making some effort.
How can I do this with my 243's/LS6 intake? Does anyone sell paper/card gaskets for these engines?
The heads will be off the motor anyway (it's a vortec getting an upgrade) so the work will be easier to get at. Is it worth doing a bit of mild cleaning up in the port, mostly between where the machining ends and the casting carries on?
Even if it only adds a few horses or 1/2 a mpg I don't mind making some effort.
06-11-2011, 10:57 AM
#2
I have often wondered this same thing. I know how its dont on the FAST intake because of its 3 piece design but on an ls1 or 6 intake Im not sure. I know I have seen a full paper gasket intake set before but it might be for one of the metaal intakes. I bet that would work if you could figure out where to get them.
06-11-2011, 11:43 AM
#4
A nice peice of fresh white poster board will go a long way.
Pull your "O" ring gaskets out of the intake and lay a peice of poster board on the gasket area....take your dirty fingers and rub all around the port areas and bolt holes....works just like a graphite rubbing .
Take a Sharp razor blade and carefully cut out the rubbed pattern and BAM! you have a perfect templet .
Lay your cut out poster board on the head, line up the ports and bolt holes then spray some black paint on the head and you can start grinding.
I use poster board for fabbing up everything I build...its easier to cut/ tape paper over and over than it is to grind, cut and reweld metal over and over to get the right shape
Pull your "O" ring gaskets out of the intake and lay a peice of poster board on the gasket area....take your dirty fingers and rub all around the port areas and bolt holes....works just like a graphite rubbing .
Take a Sharp razor blade and carefully cut out the rubbed pattern and BAM! you have a perfect templet .
Lay your cut out poster board on the head, line up the ports and bolt holes then spray some black paint on the head and you can start grinding.
I use poster board for fabbing up everything I build...its easier to cut/ tape paper over and over than it is to grind, cut and reweld metal over and over to get the right shape
06-11-2011, 01:25 PM
#5
Staging Lane
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Very helpful, I'll get a pack of scalpel blades and give it a go next week.
It might only net a few hp but for a few hours work, why not, especially after I have done the easy stuff. It's either $$ or time, I only have time
It might only net a few hp but for a few hours work, why not, especially after I have done the easy stuff. It's either $$ or time, I only have time
