Iron block 371 cubic inch LQ9, with mildly ported L92/LS3 cylinder heads. The engine was professionally built, and has been balanced and blueprinted. The engine made 545 horsepower and 517 lb ft of torque on the engine dyno.


LQ9 block, baked and bead blasted, bored, honed to 4.040" bore

Clevite H main and rod bearings, Durabond cam bearings

New GM Main bolts, and GM cylinder head bolts

Autotec forged 4032 pistons, Flat Top with 4cc valve reliefs, the engine is 10.85:1 compression ratio. Pistons are .011" out of the hole.

Racetec Plasma-moly rings gapped .018" top, .020" second.

K1 H beam rods 6.125" .927" pin, ARP 2000 rod bolts

Stock 3.622 stroke LQ9 crank, polished and balanced to less than 0.5g

TSP 228R camshaft, 228°/228° duration @ 0.050, .588"/.588" valve lift, 112° Lobe seperation angle

LS2 Timing Chain

L92/LS3 cylinder heads, new Engine Pro .600" springs, fresh 5 angle valvejob, mild bowl hand porting work. The ports flow 330 CFM intake, 229 CFM exhaust

GM 6.0 MLS head gaskets

GM LS7 Lifters

TSP 7.400" hardened chromoly pushrods

Ported and shimmed factory oil pump

Stock LY6 truck intake, OR LS3 intake, LS3 injectors, with 87mm drive by wire throttle body

Truck oil pan, waterpump, and pulley

Coil packs are included


Engine Dyno Video, here:

Forged 371 LQ9/LY6 545hp, 517tq - YouTube

Note: The headers, wiring harness, and billet TB used to run the engine in the video are NOT included.


$5000 picked up in Chaska, MN. Or you pay shipping.


A few pics













Truck intake


LS3 intake

 

Thats some monster torque from an NA 370!

 

Very impressive with the stock intake. Cam is pretty conservative as well.

 

The days i wish i had 6k lying around...



If only monopoly money was real...

 

Thats because of his cam choice with those heads.

 

I was happy with the results for sure, the stock truck intake works pretty good. Don't be afraid to make an offer!

 

Sounds like a beast.... Should move anything you put it in a hurry.

 

Nice! GLWS!

Put it on Racing Junk, too. My stuff always sells there, pronto.

 

And they say l92's need a 120lsa and 20* of split

 

Good info man, this is my motors twin almost!