1mm oversized valves

[L2RTSiAWD]

I'm thinking about getting my head mildly ported. Do I need to get 1mm oversized SS valves or are the stock ones fine?

Later,

 

[swordfish]

Might as well go ahead and do it while the head is off.

jeff

 

[L2RTSiAWD]

I'm just not sure what the benefits are.

later,

 

[jdmawd]

I'm just not sure what the benefits are.

better flow, if you are going to have you're head ported. go ahead and have a valve job done also.

 

[Polk]

Go ahead and get the stainless valves. You are a lot less likely to burn an exhaust valve(you can get away with higher exhaust temps) than the stock ones. They also have a better margin than the stock ones to help flow a little more at low lift.

Polk

 

[larryd]

so when you get 1mm oversized valves do you have to tell the shop that before they do a valve job or is it the same as stock valves?

 

[IPT]

The shop will have to cut larger seats into your head for the 1mm oversized valves