95 lt1 head info
what is the compression ratio on the heads of a lt4 upgrade kit. looking to stroke motor but don'twant huge compression due to supercharging. thanks.
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I believe its around 10.8:1 with the LT4 heads. If your gonna run any kind of significant amount of boost on a stroker, you'll want to change the pistons for a bit lower compression.96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
11.6 @ 123mph (1.6 60' - getting there
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The LT4 had the higher 10.8:1 compression ratio because of the smaller valve reliefs in the pistons, not because of any significant difference in combustion chamber volume. If you simply put LT4 heads on an engine with a stock LT1 piston, you won't really change the CR.
Of course, if you are going to seriously S/C the engine, your going to need a CR closer to 9.0-9.5:1, so you're going to have to change the pistons anyway. Plus, you wouldn't want to keep the hypereutectics with an S/C.
The alternative for a blower motor would be one of the AFR LT1/LT4 heads, or the new Trick Flow head with a larger combustion chamber.Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motorComment
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Thanks guys i'll look into that. any more info would be grestly appreciated.Comment
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