kgmtech

Was wondering if going with bigger injectors on my 8.1 would help gain some power? motor has just basic bolt on stuff exhaust, air intake, and a blackbear tune.

Mangled03gmc

iTrader: (95)

No the stock ones are fine.. Bigger injectors are needed when the stockers can't supply the fuel that the motor needs, due to blower, turbo's & nitrous. Your injectors will allow you plenty of room to grow, as far as hp goes..

xx_ED_xx

iTrader: (17)

x 2

kgmtech

Anyone know what would be a good cam for the 8.1? I see comp cams makes some cams for it,worth using? or any other suggestions?

xx_ED_xx

iTrader: (17)

I was going to use a zz502 cam in mine and repin the wires for the firing order

Mangled03gmc

iTrader: (95)

I don't think a ZZ502 motor cam will woke in the 496's.. They are totally diff engines, blocks.. http://www.raylarengine.com/ has some good things for the 8.1's

phasemaster1

iTrader: (11)

Their is one guy here that can answer pretty much any question you have on the 8.1l PM Whippled 496.

kgmtech

ya i have seen the raylar stuff but they are sky high on their prices....their stuff is all made to work together basically no need to do their cam if you aren't putting theur heads on to.

Mangled03gmc

iTrader: (95)

Yes your right, but you could prob call up and get some info out of them.. I havn't seen to much aftermarket for them(496)

hog

I am pretty sure a ZZ502 cam will work, you'll just need to swap some low tension coil wires and some injector wires.

The 8.1 is just a tall deck block.

496 = 4.250" x 4.37" (2001 Vortec 8100, 8.1 liter)
502 = 4.466" x 4.00"

peace
Hog