00transamnh

Anyone done their own intake manifold porting? Are there any DIY guides out there for the ls7 manifold? Any info would be greatly appreciated.

00transamnh

.... dum da dum dum....

lebvette

I figure it would be sort-of like doing your own heads. You might do more harm than good.
I had Jeremy do mine.

Larry

Buddy A

I did mine. More cleaned them up than removing a lot of material. There is a groove guide on the side of the ports that allows you to see how much is removed. I removed all of the flashing and smoothed out everything. I didn't want to harm the flow velocity by removing too much material. Sorry but I didn't take any pictures. I doubt that all of the shops selling their ported intakes are using a flow bench when porting their intakes.

dsddcd

I have know many of people that offer porting and usually flow the first few heads, intake..... to develop a pattern then take it from there not testing every peice they do.

Short of extrude honeing how do you get the entire runner smoothed?

00transamnh

You might... I wont. I have a full working knowledge of fluid dynamics. I was curious to see what processes/approaches folks have used to port their intakes.

dsddcd

Kenny94945

For DIY I like the the "clean up" approached mentioned above.

Yes, I can agree you could do more harm than good.

In the old days, we use to take the intake gaskets and match to the head port openings. I think an o-ring is used now for the intake. Same matching approach for the exhuast port to exhaust maniford by using the gasket as a guide.

Buddy A

Yes, back in the day I would port match using a gasket as a guide. Smooth transition from intake to head and out through the header port. Can't do that on these LS engines. If you don't go crazy and just clean up the runners you should be fine. Can only go in a few inches. Just try and smooth out the runners for better flow.

seevi

00transamnh

Ya lost me... are you saying its dumb to port an intake manifold?

lebvette

No....I think he means he's still waiting on an answer. Sort of like twidling your thumbs.

Larry

00transamnh

/\ yeah I would certainly like a better answer as well.

dsddcd

Just bumping this one in hopes of more details.

I read the below book years ago to get some practical knowledge on porting heads and they describe tips and trick using a pitot tube for those w/o a flow bench and highend equipment.

http://www.amazon.com/Chevrolet-Smal...8302451&sr=8-9

00transamnh

Yup definitely an easy enough way to test flow. Depends on what you are checking though. If your air flow hasnt had enough runner length to turn fully laminar your results could be skewed.

Another bump for a thread that needs more attention.

dsddcd

Yep, not easy to get correct CFM's in the correct range, model the complete system........ I wish I educated more in CFD.

Has anyone extrude honed their intake?