Well, i've been trolling and planning for a while on this site and its come down to nitty gritty time. Heres my situation. I'm swapping a '03 LQ4 into my '94 GMC 1500. I bought this motor on the cheap and was told it had that he thought was a "lifter tick." (see where i'm going with this?) I've pulled the motor apart and found the "lifter tick."



I know what caused this. The truck was rolled and was on its lid for a while. The intake was full of oil when we pulled the motor out and i think when they went to start it the bulk of the oil found its way into the #2 cylinder and snap. The engine is other wise in amazing shape, factory cross hatch, crank looks great. I think if i wanted to i could throw a good piston set in that hole and run it....but thats not our style is it.

I'm on a very tight budget here ( i know what tight budget and reliable performance don't go together) and i've started looking at parts. I wan't to keep the stock crank and bore because its really not in my budget to get crazy. So hears my plan/parts list.

ARP Head studs
ARP Main studs
Scat H-Beam Rods (P# 66100945) 6.100", 0.945 Pin
Mahle Piston/Ring set (P# LS1340000F04) 4" Bore, 3.62" Stroke, Flat Top
Cometic Head Gaskets (P# C5751-051) 4.060" Bore, .051 Compressed

Now if my math is right this should leave me with a little over a 10:1 CR. and with a thicker (i used .091) HG would be about a 9.4:1 CR, using stock alum 317 heads. My plans for this motor are to run it NA for a good while then build a custom twin turbo set up for it. i'm looking for around 650-750HP once turbo'd.

So heres what i need, look over the parts i've chosen, if you like it say so, if you think i need to change something up give me an alternative (part numbers please). If i can save money by spending some i will. I'm also looking for advise on bearings and a cam (been planning on using a Z06 cam). The more information i get the better because i don't like doing things twice. oh, and yes, i have found a 4L80E to put behind it.

 

bump....anyone?

 

I think your head gasket choice is a little too thick esp. for running boost. Also you can run a dished piston by Speed Pro and keep your CR at 9.4 to 1 which I think is a little more blower/turbo friendly.Very similar to my build ZO6 cam and all.Buy the cam used LOTS of used ones avail. and a great turbo cam too.Trouble with builting these motors is cost of 1 time use bolts which you are avoiding with the ARP stuff.Good Luck and keep us posted!