Holley Carb Woes - DCDoug Pay Attention (Long Post)

[elmariachi]

Originally Posted by dcdoug

I too had NOS MR heads that had never even had valves in them. Now I wonder whether he just shared the opinion of Ernie that concern about unleaded gas on unhardened seats is overrated or whether I have hardened seats.

There are varying opinions on this, sorta like Republican vs Democrat. For every person who says you are screwed there is another that says "No worries." Try a borescope and if that doesn't solve your burning desire and you can't sleep, use an additive. But in all honesty I am doing it not as a preventative but as a little insurance. When I finally move up to Blue Thunder or KC heads, if my valve seats are damaged, then I'll have seats installed before I sell the heads. And if the heads are toast (highly unlikely) then I'll add that to the list of sh!t I wasted during my Cobra learning experience. Go ahead with that Holley 3255 and your mind will be off of valve seats in no time. I promise.