Boosting lsx376
#1
Staging Lane
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Location: Santa barbara,ca
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Boosting lsx376
In the next few months i am going to get the rest of the parts to boost my lsx376 crate motor. If you don't know the specs on a lsx376 it is basically ls3 cam with ls3 heads and a ls3 intake, i have 2" stainless headers on it too. i have a d1sc procharger with a 3 core intercooler for my setup already, i just need injectors, pin crank, and a new bracket. here is a pic of my current setup.
My question is how much boost can i run on pump gas with 9 to 1 compression?
What size injectors? i have a 340lph pump in tank already with pro charger inline pump.
My question is how much boost can i run on pump gas with 9 to 1 compression?
What size injectors? i have a 340lph pump in tank already with pro charger inline pump.
#6
This setup is a Ls3 in a LSX block. Its the whole package, crank, rods and topend. I spoke with Mike Thomson (I believe his name was) from Thomson Automotive (TA Racing engines) on last years power tour. He was driving a chevelle with a lsx block 454 with a ls9 top end.
I ask him specifically about this motor. He told me to stay away from some serious boost on it. Just like any OE engine it will take 8 psi with no problems. I was looking into the 14-16 psi range.
Engine type: LSX Series Gen IV small-block V-8
Displacement (cu in): 376 (6.2L)
Bore x Stroke (in): 4.06 x 3.62 (103.25 x 92 mm)
Block (P/N 19243171): LSX cast-iron with 6-bolt cross-bolted main caps
Crankshaft (P/N 12597569): Nodular iron
Connecting Rods (P/N 12607475): Powdered metal
Pistons (P/N 12166957): Forged aluminum
Camshaft Type (P/N 12603844): Hydraulic roller
Valve Lift (in): 0.551" intake / 0.522" exhaust
Camshaft Duration (@0.050 in): 204° intake / 211° exhaust
Cylinder Heads (P/N 12615879): Aluminum L92 style port; "as cast" with 68cc chambers
Valve Size (in): 2.16 intake / 1.59 exhaust
Compression ratio: 10.7:1
Rocker Arms (P/N 12569167 int): Investment-cast, roll trunnion
Rocker Arms (P/N 10214664 exh): Investment-cast, roll trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: 92 octane
Maximum Recommended RPM: 6600
Reluctor Wheel: 58X
Balanced: Internal
I ask him specifically about this motor. He told me to stay away from some serious boost on it. Just like any OE engine it will take 8 psi with no problems. I was looking into the 14-16 psi range.
Engine type: LSX Series Gen IV small-block V-8
Displacement (cu in): 376 (6.2L)
Bore x Stroke (in): 4.06 x 3.62 (103.25 x 92 mm)
Block (P/N 19243171): LSX cast-iron with 6-bolt cross-bolted main caps
Crankshaft (P/N 12597569): Nodular iron
Connecting Rods (P/N 12607475): Powdered metal
Pistons (P/N 12166957): Forged aluminum
Camshaft Type (P/N 12603844): Hydraulic roller
Valve Lift (in): 0.551" intake / 0.522" exhaust
Camshaft Duration (@0.050 in): 204° intake / 211° exhaust
Cylinder Heads (P/N 12615879): Aluminum L92 style port; "as cast" with 68cc chambers
Valve Size (in): 2.16 intake / 1.59 exhaust
Compression ratio: 10.7:1
Rocker Arms (P/N 12569167 int): Investment-cast, roll trunnion
Rocker Arms (P/N 10214664 exh): Investment-cast, roll trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: 92 octane
Maximum Recommended RPM: 6600
Reluctor Wheel: 58X
Balanced: Internal
#11
9 Second Truck Club
iTrader: (17)
The LS2 style rods are pretty tough if you don't get greedy with the timing. I've been over 130mph 1/4 mi in my 4875 lb 4x4 truck with a 05 lq4 as well. At 126mph a set of the early 6.0 rods bent and broke on me. The ls2 rod isn't the optimum rod for big power, but their a lot stronger than credit given...