My DD

[jbrown97ls]

This is such a solid build!

 

[99TegLs]

Dam.

 

[jonesvirs]

Awesome car reminds me of my green one

 

[96LSteg]

My current battery is getting weak. So I traded a valve cover I coated for a brand new yellow top..

And about to get down and dirty on the port/polishing on my head. Got to get motivated!

when you port your heads, what do you base your work off of? I know the flow numbers is one factor. I guess what Im wanting to know is do you use the exhaust manifold gasket to know the maximum amount of material that can be removed? What do you use to determine how much material to remove and how far back into the head to you go?

 

[TheMyth]

Gaskets provide port match size. Then using calipers to make sure you keep the same port size throughout the runners. And in the end, cc'ing to make sure the job is done the same to each cylinder. Having that piece of a head is a guide to keep in mind the wall thickness.

 

[TheMyth]

And the headgasket can provide as a guide if you are able to de-shroud around the valves in the combustion chamber. Normally are with larger bore cylinders.

 

[96LSteg]

Gaskets provide port match size. Then using calipers to make sure you keep the same port size throughout the runners. And in the end, cc'ing to make sure the job is done the same to each cylinder. Having that piece of a head is a guide to keep in mind the wall thickness.

this is good to know. I would like to do a DIY port job...I think I will buy a junk LS head and practice on that one first...

 

[TheMyth]

That would be a good idea. Pra tice makes perfect. There are many tools out there. SummitRacing has alot. I dont know what is all around your area. There is a SummitRacing store about 1 hr from me. So its nice to actually see what i'm buying than looking in a catalog or on phone/computer.

 

[96LSteg]

That would be a good idea. Pra tice makes perfect. There are many tools out there. SummitRacing has alot. I dont know what is all around your area. There is a SummitRacing store about 1 hr from me. So its nice to actually see what i'm buying than looking in a catalog or on phone/computer.

what types of bits do you use when porting? when polishing?

 

[TheMyth]

I use that air grinder in the pic. And a couple carbide bits for aluminum for the porting. Summit has some different lengths. They will really rip threw the aluminum real quick. Have to be careful and take your time. The bits will want to bounce some when the aluminum tries to stick in the bit. So keep them sharp and clean. Then I get a large pack of sanding tips for a straight tip bit. That is to smooth out from the wrath of the carbide bit. Got them from Harbour Freight.

 

[96LSteg]

I use that air grinder in the pic. And a couple carbide bits for aluminum for the porting. Summit has some different lengths. They will really rip threw the aluminum real quick. Have to be careful and take your time. The bits will want to bounce some when the aluminum tries to stick in the bit. So keep them sharp and clean. Then I get a large pack of sanding tips for a straight tip bit. That is to smooth out from the wrath of the carbide bit. Got them from Harbour Freight.

got it...so carbide bits and sanding barrels

 

[TheMyth]

Yes sir!

 

[TheMyth]

Can take it a extra step and use 600-1000 grit sand paper and use your finger to sand the runners down after the barrels. To remove their marks. But its not necessary. Just depends on how you want it to look.

 

[96LSteg]

Can take it a extra step and use 600-1000 grit sand paper and use your finger to sand the runners down after the barrels. To remove their marks. But its not necessary. Just depends on how you want it to look.

sweet! I want it to be as clean as possible. I got another question for you...When you do your head work, do you do any work to the combustion chambers? Not like a valve job but just smoothing out the surfaces there?

 

[TheMyth]

You can if you want. Thats why I said about de-shrouding around the valves at the side closest to the headgasket/cylinder wall. But you will need to check with the headgasket to see. And keep in mind if you start taking away material in the combustion chamber, you will be reducing you compression ratio. And I would suggest cc'ing each combustion chamber if you do that as well.