8k rpm's on stock valves.

[bryanwheat]

So i am building my head up, crower single springs and titanium retainers, new revised lifters, ffwd 272 cams. I am wanting to turn this thing at the most 8 thousand rpm's, how do you guys think the stock valves will hold up with this kind of rpm?

 

[diambo4life]

sorry still disagree. Horsepower is a function of torque. nothing more. Gearing will change torque values as it does HP values. I guess you could say gearing is a torque/HP multiplier... As gearing affects both. Could go into it exactly but it seems like you are a smart guy and understand how HP is calculated.



I more or less agree with that.

Well stated!

 

[mach4g63t]

Little question to spark some revival...


How good is the stock dampener pulley on a motor that is revving 8k+? From what I'm hearing, to be truly safe revving a stock head on 272's over 8,000 rpms, you need to invest in an aftermarket Dampener... ATI or whatever.

For you guys who chimed in and said you did all this on the stock "motor", did you use an aftermarket dampener? How safe is it really to spin above the stock rev limit on the stock dampener?

Not to double-post, but does anyone have any information regarding the stock damper? All the searched threads about the damper just come back with how it has split in two pieces. What I'm looking for is whether or not the stock damper is reliable to be spun at 8000 rpms, or do I -have- to get an ATI or fluidampr

 

[blcknspo0ln]

You don't have to get anything you don't want. I spin my motor close to 9k all the time with the stock dampener; that doesn't mean you or I should, though. Of course, a fluidamper or anything of the like is going to be beneficial to the rotating assembly when revved up that high.

 

[mach4g63t]

You don't have to get anything you don't want. I spin my motor close to 9k all the time with the stock dampener; that doesn't mean you or I should, though. Of course, a fluidamper or anything of the like is going to be beneficial to the rotating assembly when revved up that high.

That's all I wanted to hear. Just wanted confirmation that someone has gone as high as 8k (or higher) on the stock damper. Thanks a ton!

 

[blcknspo0ln]

Well, if you do decided to spin that high, just be aware of the possible consequences.

 

[mach4g63t]

Yea, valve float was my biggest concern, and probably the most well known. But then I came across the dampers and that instantly made me hesitant, so I wanted to know if it was possible on the stocker. I think I'll give it a whirl and when I get the cash a little down the road I'll upgrade.