i have a 03 6L that i want to use as a base for this motor. what would you do to the motor? cam? forged rods, pistons? what brand? this would deffently have to be a buget build $2-2500 limit for the long block.

i figure 10psi should be good enough to stay away from belt slip issues, and heat problems. and if i feel the need for more power i will spray a 75 shot.

i figure i would spin the motor up to 6k max and just try and make as much power up till then.

how would you build this motor and why?

 

If I had to rebuild my LQ4 for MP122 duty, I'd use Eagle H-beam rods, forged pistons, and use the stock crank. Aim for about 10:1 c/r. I like the LS6 cam and high lift rocker arms that I'm using now. That won't change. I might port the heads a little, but that would be out of your price range. I'm at 9psi (2.8" blower pulley) on my stock short block LQ4. I'm hoping it will last a while longer. I have a 75 shot on it, but use it only at the track.

 

Probe 6.125 4340 I-Beam Connecting Rods
Probe Forged Flat Top Pistons -3cc reliefs
Federal Mogal Main/Rod Bearings
Stock Cam Bearings
ARP Main Stud kit part#234-5608
springs/titanium retainers/stock locks
GM MLS Head gaskets
Melling oil pump 10296 w/ blue spring.
I'd get a Custom Cam but a GT2-3 would also work.

 

does the 03 6L have any internal problems?

 

thanks for the reply. what times do you run with out the 75 shot?

 

the 6l has 95k miles on it. ive never heard it run. i bought it with the intention of tearing it down and building it.

 

It has run low 12's. Hope to get into the 11's this weekend with the cooler weather.

 

your going to eat up 2-2.5k fast doing things right even on a budget build. I don't see it happening for that $$ amount. I would save more money and run the stock motor until it pops

I would contact local engine builders and see what they are willing to do, get some estimates, make sure they know what they're doing, make sure they are reputable. Anyone not local to you would obviously add shipping $$.

 

2000- 2500 will get you half a short block. If i were you ide get a good set of heads and cam and run it on you stock short block