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OEM spring and valve longevity

Posted: Wed Nov 07, 2012 8:40 am
by rebeltshead
So I'm about to start putting things together. (just dropped my crank off for grinding) I was wondering should I replace my valves and springs from a head with ~140k-150k on it? I'm just doing a high compression 200whp goal line for now. I'm not going with upgraded ones I just want to know if you guys would replace them. I'm on a little bit of a budget too.

Posted: Wed Nov 07, 2012 10:30 am
by beercandrifter
you should be fine leaving them. Have rocked multiple 200k heads with no issues. If you plan on going past the stock redline, thats about when you should consider it. the plain 6500rpm redline works out just fine though

Posted: Wed Nov 07, 2012 11:02 am
by rebeltshead
Okay, cool! Thank you 8)

Posted: Fri Nov 09, 2012 11:25 am
by niceguy
260k+ on my '93 Altima engine/head no problems including running to redline every day before a stuck thermostat and my wife cluelessly driving around killed the head...

BTW, just curious, you're doing a higher than stock compression NA build, or what exactly? I would guess not since this is KA-T but just thought I'd ask since a high comp NA motor wouldn't go far with stock valvetrain anyway, Did I answer my own question lol??