GX390 head porting, Monster Flow (Part 2) Welding oil passage // Paulskarts.com

[@kidkhaos6427]

Im looking forward to the end result! This reminds me of guys putting Cleveland heads on 351W's and 302's before billet heads wete widely available. I half expect to see you working out the details on a billet head next!

[@paulskartslifan4206]

Hell yea .. thanks man

[@ol-man-duffyj688]

Woah!!!! 🤯 Mind blown ons what you do to these heads. 80lb springs too! Good lord how does the poor cam loves hood up to that. I see why you weld that back strap to the case now!!! 😮

[@Goonsnuke]

Do the copper valve seats have a shorter lifespan?

[@paulskartslifan4206]

Well firs question is shorter lifespan than what ? They last “in these applications” a lifetime .. in a car (racing engine) they can wear out over time like any seat can.. but I wouldn’t say they wear out fast. But the copper is softer than steel. That’s why they seal so well. They deaden the bounce of the valves. Also the seats stay in the head tighter than iron seats. They also take the heat out of the valves faster. So I’d say to answer the question of if there going to wear faster than iron seats “yes” slightly but the use of them for there benefits is why we use them. Usually the more power and faster you go the less longevity of the engine is sacrificed through wear and tear.