port work
 

i read this article http://www.tmossporting.com/tabid/3682/Default.aspx
understand it (for the most part)
got a few questions and would like some tips
since were running boost (more pressure) if the runner is bigger would that allow for more volume once the low pressure wave got past the throat?
i started doing the intake so far, shaved off the big bump at the top were the injector part merges with the rest, sharpen the wall were the port splits in 2, going to port match, smooth out any bumps and try to make the walls smoother.

i dont have a flow bench or will be using one, and i dont mind spending a few hours longer to get better results
lets hear what you guys have done / experienced

Re: port work
 

come on ppl im bored at work and would like to get some porting done

Re: port work
 

On a turbo car the only things in the port that are going to net you any useable gains on the street (high horsepower apps are another story) is the porting around the injector boss and changing the valve angle. Changing the port size isnt going to yield you the results you think it will. When the port is pressurized your still somewhat limited by the size of the valve regardless of the port size.

You should NOT port the exhaust ports to match on the cyl head because you actually WANT a 'step' from the head to a larger exhaust manifold port. This helps prevent reversion.

Intake ports need to be a fraction larger than the intake manifold ports to keep from blowing the gaskets out.

Re: port work
 

oops too late exhaust is alredy done, oh well :P
injector boss as in the intake manifold? i smothed out that big bump from the injector in the head
i know i wont see a huge difrance but every little bit will help

Re: port work
 

Yeah you can also port the material out around where the intake valve guide is but dont port the guide itself.

As far as the exhaust goes, just port out your manifold ports to be larger than the ports on the head. No biggie.

Re: port work
 

ok

Re: port work
 

i am interested to know what this means. do you agree with him or are you just not touching it?

Re: port work
 

he's about has wrong has green chicken

Re: port work
 

Just wow. :3