is their anything special about them? are they for better or for worse?

 

The "split" refers to the difference in duration between the intake and exhaust lobes specs. The SBC (LT1 included) has poor exhaust flow relative to intake so you will typically see more exhaust duration than intake duration. This is what's called a split. A "reverse split" cam would have more intake than exhaust duration. For your typical engine this is not going to give optimum performance, most likely going to result in more pumping losses and hitting "a wall" at too low an RPM to achieve max peak power that the intake duration is capable of.

LS1 engines (and others) on the other hand use a completely different cylinder head. With an LS1 the exhaust ports don't have the same deficiencies that the LT1 head has so it is more common to see a reverse split cam.

The only reason I can think of for using a reverse split cam on a SBC or LT1 is if you're optimizing it for a turbocharged application.

 

Like Buttercup said reverse split cams are usually used on turbocharged motors.

 

MMMmmmmmm Tuuuurbo. goooooood.


he he ,
-JOhn

 

thanx for the info. i thought that i had seen them on a good amount of turbo charged vehicles, now i know why.