I ask this because I am re camming and also want to improve cyl head flow. I purchased from "Speed Pro series" a book on how to modify and power tune cylinder heads. In their process they show how to remove the guide boss, and I wonder does anyone here have knowlege about this?

Is it race only, no daily rides?
How much would this compromise valve guide life?
Thanks for any feedback.

Keith

 

From what I've gathered here and various other sites/books, the guides are longer than they need to be, and cutting them down doesn't harm their lifespan.

 

Theyre long & supported by plenty of head.. but eh.. knocking out guides & removing the boss completely.. time is $ & i dont think it's worth it.

 

i guess i could be wrong, but i always thought that you would machine down the valve bosses to fit a spring with a tighter inner diameter like those dual valvesprings, but maybe i read your post wrong

 

You're referring to the valve seat boss, not the valve guide boss. Here's a picture of what we're talking about:

http://www.fordmuscle.com/archives/2...ng/index.shtml

 

Removing the valve guide may work in some heads but not in a Lt1 head!!,try cutting the boss down about half way(both intake and exhaust)down,then shape the boss into a vain or teardrop shape!,this will help flow far better then removing the boss.