tricks of the trade when porting heads.....

[trickymex]

I was wondering if anyone on here would have any advice on measuring the port while working it????


It just seems that i spend a lot of time measuring the ports to make sure that i get them all the same, in fact most of my time is spent measuring rather than actually working on the head

does anyone have any advice or tricks that would help???

[Guy Croft]

Good question.

1. I'm pretty good at porting but it takes years and years to achieve really good repeatable results by hand. The more variety of heads you do the harder it is because, well, you can 'get out of practice' easily.
2. Hand porting, no you have to use gauges and calipers constantly.
3. By hand you'll always get scatter, +/- 2% port to port on flow is achieveable, that's what I routinely get. Does that matter? Does it affect the power? Not one bit.
4. Because of the scatter problem F1 were the first to go to fully cnc machined ports, this method of course has been widely copied.

GC

[trickymex]

Guy, Thank you

I think i am being a bit over critical about getting all the ports exactly the same.

I have made port moulds before just to check consistancy just to find that its a very labour intensive job just to confirm what the caliper says!!!

i guess its nice to be sure though.

Thanks again

Ricky