New to ls engines
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Teching In
Joined: May 2012
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New to ls engines I just bought a used lq4 engine and tore it down to bare block. Besides a lot of carbon buildup on the piston tops it seems to be pretty good! crank looks good no obvious signs of extreme wear of spun bearings. The cam bearings do however look pretty nasty though I was wondering if they generally look dirtier or not and also is there anything in particular that i should check out before I proceed to build this thing?
Thread Starter
Teching In
Joined: May 2012
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Sorry I just realized I didnt specify I will be having the normal machine work done and probably gonna get some l92 heads and go back together with flat top lq9 style pistons. This is going in a c3 corvette as time and funds allow.
sound like a good project, post some pictures..
You know that many of the bolts will need to be replaced as they are not re-useable. GM or ARP. (rods, Head, mains, balancer, etc)
What Trans are you going with. EFI or Carb ? keep the build thread going !
BC
You know that many of the bolts will need to be replaced as they are not re-useable. GM or ARP. (rods, Head, mains, balancer, etc)
What Trans are you going with. EFI or Carb ? keep the build thread going !
BC
Thread Starter
Teching In
Joined: May 2012
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Absolutely on the new bolts and such I will probably be running a 4L80e for trans undecided yet on the efi vs carb dilemma carb is definitely a little easier on a person who is not familiar with the electrons but efi gets way better mileage and is less hassle after it's done.
I am wrapping up my build. I bought an lq9 with 200,000 miles. When I tore it down, it still had cross hatches on the cylinder walls. I had it hot tanked, bored and honed to .030 along with new cam bearings. I didnt specify anything on the outside block so when I got it back, it needed some wire wheel work on the exterior. If your shooting for N/A with no spray you can use speed pro pistons. I bought mine from summit racing for $350 including rings. The machine shop said they were not close to being balanced and took a little work to balance the whole set. I also used some stock l92 heads.
I havent had it dyno'd yet but it runs good on the base tune. They make easy stand alone harnesses.
I havent had it dyno'd yet but it runs good on the base tune. They make easy stand alone harnesses.
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Thread Starter
Teching In
Joined: May 2012
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Ya this lq4 had a bunch of miles judging by buildup and such but the bores are surprisingly clean can still see cross hatching. I am thinking newer lq9 rods because they are more heavy duty and will Probably go back with the flat tops since it will not be a boost motor.
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Verdad Gallardo not to mention a little more compression with the flat tops. I bought a lot of gaskets and such from advanceauto.com Also bought a lot of fasteners from speed engineering. They always seem to have good sales on that stuff.
TECH Fanatic
Joined: Jul 2005
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From: Beebe, Arkansas
Ya this lq4 had a bunch of miles judging by buildup and such but the bores are surprisingly clean can still see cross hatching. I am thinking newer lq9 rods because they are more heavy duty and will Probably go back with the flat tops since it will not be a boost motor.
you should rebalance regardless. The new rods can be found pretty cheap. You could also pick up a set of scat I or H beam rods. If you look around I think they can be found for around 300.
TECH Fanatic
Joined: Oct 2011
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From: Felton Pa
I think I've seen a Dominator intake but not sure. I do know they make an adapter to put a standard square bore carb on a dominator intake, You can just flip the adapter over and use it the oppisite way.
I just saw a dominator on the GFORCE1320 Engineering GTO, google him and call to see what intake he's using.
On your cam bearings, I've been into 4 or 5 motors and the cam bearings always look horrendous. Luckily they are cheap. Your 2004 motor was a crossover year for cam bearing change, so you'll have to drive them out and measure the front or rear diameter to know which you need..
On your cam bearings, I've been into 4 or 5 motors and the cam bearings always look horrendous. Luckily they are cheap. Your 2004 motor was a crossover year for cam bearing change, so you'll have to drive them out and measure the front or rear diameter to know which you need..
