I can't decide between the World Sportsman II's cast 202/160 64cc or Holley aluminum 202/160 63cc. Can anyone help me out. I've got what's in my sig + .040 over and 282* .465" cam. I'm buying them next week and can't decide. I cant either one for the same price.

Thanks guys,

Christopher

 

For the same price definitely go with the Holley heads. World heads suck out of the box.

 

Sweet, thanks man

 

Since it looks like both flow very similiar, I would also lean towards the aluminum head. They are lighter, less detonation prone, and easier to repair.

 

Since you have to put two heads on why not just go with one of each.
On the more serious side youd be better of with hollys for the reasons metioned above.

 

I could do that and put the aluminum holley on the side with my holley longtube and put the world on the side with my hedmen shorty. That way I can get the most from my longtube.

 

Hmm that gives me an idea. Since you can only build an engine for one rpm range i wonder what would happen if you built half the engine for high rpm hp and the other half for low rpm torque. That would be one hell of a crazy intake manifold.

 

Try it and tell us the results!!!

 

You would get the intesection of the RPM ranges.

 

I'm running a set of Holley heads, I really like 'em.

As for building half and half motor, sounds like you'd pretty much end up with a 4 cylinder for the whole rpm range.