How High Can You Go?

[Baz]

Just a curious question that has been on my mind for some time now.

What are the power benefits and risk factor on increasing the RPM of a standard motor?

And if something would be to break, what would generally be the component that gives way first?

I understand that this would only be benificial if you had a turbo that could flow enough air to make use of the higher RPM.

Cheers,

Scotty

[R31Nismoid]

Generally rods... more the rod bolts are an issue when you start talking larger RPM.

Also the factory motor isnt exactly built with sensational tolerances.

Good for what it was designed for, but upping it more and more with parts that could be better balanced for big RPM type reliability doesnt always end well.

Also valve float has been seen with 7800-8200rpm and ~20psi in (some) RB25s.

Really depends what motor your talking about too mate as some have slightly varying characteristics

cheers

[r_speedfreak_r]

it also depends on how well your engine is balanced. I've got a built motor thats balanced but im still not getting it to rev any higher. i want it to last