Originally Posted by hemienvy
My guess would be, no need to increase your RPM limit unless you also increased your cam to move the powerband up.

However, by keeping your same RPM limit, you could use less spring, which would tend to beat up parts less.


I look to the 69 1/2 six pack engines as an example. Again, IIRC, the design rpm limit with the stock cam was about 5800 with the springs used. With the same cam timing events, the six pack engines have stiffer springs which raised the usable rpm limit to 6200.

"We live in a time when intelligent people are being silenced so that stupid people won't be offended".