Speedmaster valve quality

-
As for valve quality from China, I'll say not that bad. I haven't been rebuilding and building heads for very long , just about 4 years but I can say I've not seen a failure yet of just a valve.
 
NC Engine Builder said:
I never said anything about sending him your own heads
Click to expand...

Just clarifying for the readers….. I inquired on one of the head specific threads about this subject, just wasn’t sure.
I actually sent one of my sets of W5s to Ryan J back in the dark ages as he had a cnc port design for them. He had quite the stack of them before he had them cut.
 
MOPARMAGA said:
As for valve quality from China, I'll say not that bad. I haven't been rebuilding and building heads for very long , just about 4 years but I can say I've not seen a failure yet of just a valve.
Click to expand...
It caint be too bad, can it? That's where probably 90% or more come from and we're not seeing mass failures.
 
RustyRatRod said:
It caint be too bad, can it? That's where probably 90% or more come from and we're not seeing mass failures.
Click to expand...
Yeah and I hate to say but if it wasn't for the chinesium stuff 90% of people couldn't afford to get their cars fixed .
 
Just a heads up. I ordered the valves and thank you to all who took the time to answer me.
 
Both are correct, as there are multiple benefits. 5/16 / 7mm have similar benefit (not as pronounced on flow, but great for weight). With the reduction in stregnth with 5/16 / 7mm size stems, the quality needs to be high and the geometry needs to right to avoid catastrophe...
 
RustyRatRod said:
I meant 11/32" stems. I went back and changed it. lol Some people are even going to 5/16" and 1/4" stems, but 1/4" is gettin mighty small, IMO.
Click to expand...
I guess the seals would need to be the correct dia to match the valve stem. Do the valve guides need to be changed to match?
 
You must log in or register to reply here.
-

Back
Top