Raising The Redline On The Z

Originally Posted by THE BULL

It's a hit or miss and this is a topic you don't want any misses.

Raising a the redline and tuning for it will move your power band and leave your low/mid range a bit bland.



Then ask yourself where in that rev-range will you see yourself and you can come up with a better answer. Tons of things at play here.



A balanced crank/rods with an ATI and great oil pump clearances should last quite a bit but it's all determined on driver/abuse/tune.



Whoever plans on this should have coolers, damper, tune and should open their filters.



Rev should be determined on Rod/stroke ratio + mods + tune. Even then it's not a guarantee.



It appears the VHR has a 1.72 ratio (if math is right)

For better comparision:

Honda K24s have a 1.54 ratio and with a type S pump they are usually revved to 8k

While it's younger brother the K20 has a 1.62 ratio and these are take to 9k every day.

The odd child would be the F20c with a ratio of 1.81 and these are production engines with a standard 9k rev limit.



I understand that how some may feel about Hondas however these high revvers can provide great info at that ratio as long as everything else holds 8k should be feasible.