i'm woundering what the highest safe rpm that i should push my motor?

my mods are afr 195 heads and a CS XE262H-14 cam

 

Any upgraded parts in the engine ; crank / rods / pistons?
Engine balanced?

 

If it's a stock shortblock, not rebuilt, about 6200, or 6400 at the most. If it has 100k or more on it, I'd limit to about 6000.

 

Yeah, i'm running into the same situation on my LT1 swap, the heads I have will support a large cam for serious power, but I stayed with a smaller duration cam so the power was in where I felt the safe limits of the short block to be. The valvetrain should be good to near 7k, but the short block is a stock 68k block out of a Roadmaster. Its a smaller cam at 226/232 on a 110.

Could have gone bigger, but I didn't feel like having a short block go boom and ruin my nice, newly ported heads.

 

thanks, its a still stock bottom end, for now any way. i just didnt want to push it to far and it go boom. i think i'll keep it under 6k to be safe until i get the bottom done.

thanks for the help

 

With that cam I dont think you'll need to ever go to 6k. In my 350 it doesnt do much past 5500.

 

I just looked at your cam. You probably wouldn't want to spin that cam much past 6k on a 350 anyways. It won't really make much power above 6k, spinning beyond that wouldn't get you any performance gains.

My cam will want to be shifted in the 6200-6400rpm range on a 350. At least, thats what lloyd elliot told me when I ordered it from him. I really didn't want to go north of 6500 on a stock short block. But once I have a short block built I'll replace the cam with a more aggressive cam, by then I should have a 9" or 12 bolt with a better ratio more suited to a larger cam like that.