Turbo6.0

iTrader: (3)

Hey guy's, I've tried searching the forum looking for anything related to cylinder head porting. But all that comes up is ppl with ported and polished heads that have been purchased for a build. Can't find anything on members porting and polishing their heads. Anyone know of any? I might just have to do my own write up. I have a spare set of 317's I am looking to mess around with..... I've never ported and polished cylinder heads before, so it could be a fabulous or a couple of F-Bombs. Hahaha So let me know! Thanks.

07Softail

You will benifit the most just by cleaning up the bowl area and a nice 5 angle valve job.

RT

TrendSetter

ls heads benefit the most from cleaning just inside the valve seat and opening up around the valve guides and bowls. if you use the summit kit, youre wasting your time. polishing isnt accomplishing anything, you need to move some real metal.

Turbo6.0

iTrader: (3)

Ok thanks for the heads up, I'm going to attempt a write up. I'm going to start buying the burrs and the sanding rolls. Know of any good quality burr kits?

1FastBrick

iTrader: (17)

Tons of info out there.... Some good some bad...

https://www.performancetrucks.net/fo...orting-519880/

alright you DIY port guys, come on in - LS1TECH

TrendSetter

i use sgs burrs

i did a short walkthrough when i ported my evo head and nobody gave a crap. ¯\_(ツ)_/¯

Drspencer

iTrader: (1)

Bought my burrs off eBay 8 years ago...ferrous and non-ferrous bits have been just fine. Buy a gallon of WD-40 and the plastic spray bottle to keep the bit cool.


10MM Ball Nosed THK Tungsten Carbide ALUMINUM CUT Bit Burr 6MM Shank (150MM-F10) | eBay

ezdaar

iTrader: (1)

You can very easily ruin a set of heads not knowing what you are doing when porting.
There is ALOT more to porting a head then just removing material here and there all ***** nilly like.

Tig

iTrader: (2)

I've always wanted to give P&P a go, just seems interesting. Plus I like working with metal.
Is there more blending involved than removing material with LS heads?

TrendSetter

Theres more to porting heads than just removing material. the idea is to reshape the port for maximum efficiency. This is not nearly as easy as it might seem. its a mix between visually determining port shape and feeling it, since shiny aluminum is hard to see complex subtle shapes.
on ls heads, you can do a lot in the bowls, and raise the roof some. i take out that swirl hump but you cant go too far or you will find water. the other size of the valve guide can be opened up deeper. moving some out of the sides helps also. i like to focus on the roof and the walls and i generally leave the floor mostly alone.
the runner roof i remove a decent amount of metal from for the whole length. I routinely break into the rocker arm mount hole. some material gets removed from the straight wall. i like to open up the pinch point where the pushrod goes as much as i can (be careful here). 'gasket match' isnt really something i value much on these heads. be careful with the short side, they are very sensitive to subtle reshaping. try to just smooth it out, i dont recommend trying to reshape it unless you really really know what youre doing. you can kill the flow of a head by messing up the short side faster than anything.

just remember trying to describe porting heads with text is no different than me explaining how to do a nice hair cut verbally.