CR Cam in ISB?

[luvthenw]

I am working through some cam issues with a 53 block. In the mean time I am thinking about installing an 03 CR cam in my 98.5 24 valve? I understand it will work. I was wonder what the impact would be on performance? The truck is stock.

 

[COMP461]

Would not be a good swap, the LSA , or lobe separation angle on a 24 valve is 108, the CR is 98.5. The CR has this tight LSA to give passive EGR .
The wider LSA’s are the road to more power without overlap. the MaxSpool 2.5++ has a LSA of 108 to 112 depending on applications my newest race cams in both roller, and flat tappet are as wide as 116 .
Anyone going tighter is going in the wrong direction; this is in my 25 years of cam design opinion

 

[luvthenw]

Thanks for the explanation.