Sounds like a good enough reason right there, if it idles better (no loading up) and fuel consumption is better (more efficient burn). How much would this typically cost to have a set of heads modified this way?

 

There does not appear to be a down side to it. The way I look at it is there is a gain or there is no benefit. Doesn't sound like it could hurt to try it.

I liken this to the aero wings I had cut on my crankshaft counterweights. I'm only expecting to turn no more than 6300rpm. Some people said it was a waste of time for my motor. Others said a small benefit would be gained. I did it anyways incase there was an easy 3-5hp to be had. If I had known of the grooves earlier I would have had it done. Could only help or not hurt anything.

 

Get in touch with Mike, he can help.

http://www.powrehaus.com/

Mike Holler
email: mpgmike (AT) powrehaus (dot) com

(717) 438-3767

3424 Liberty Valley Rd.
Ickesburg, PA 17037

 

Free just do it yourself!
-brandon

 

What about carbon build up in the groove? Would that affect the amout of air blowing into the combustion chamber?

I've read this thread regarding racing but what about daily drivers?