RussC

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

vetteoz

iTrader: (13)

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

86LG4Bird

iTrader: (1)

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.

Thirdgen89GTA

iTrader: (5)

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.

RussC

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

InfernalVortex

iTrader: (4)

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

Thirdgen89GTA

iTrader: (5)

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.