Stock LQ4...??
03-09-2007, 09:40 AM
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Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
Stock LQ4...??
Does anyone know the stock head (combustion chamber CC) and compression ratios of the stock LQ4 (6.0 truck) engines? Please and 
03-11-2007, 06:30 PM
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Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
Any one know how much of an increase in compression it would make going from the 71cc head of a 6.0 (9.5:1 compression) to the 69.8cc head of the L92s? I know it would be much, maybe something like 9.6or9.7?
03-11-2007, 07:54 PM
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Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
I mean with the stock 6.0 shortblock, the GM L92 heads, L76 intake, and LT headers.
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03-22-2007, 10:37 AM
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Car: 92 z28 25th
Engine: 5.7 liter
Transmission: 700-R4
Re: Stock LQ4...??
lq9 is in the escalades and such and has a 10.5 i believe and the lq4 which you get out of the lesser trucks has a 9.5 to 1. The change is due to the lq4 having dished pistons and the lq9 has flat tops. i wish i knew the chamber volume
03-22-2007, 09:11 PM
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Car: Camaro
Engine: 6.2L
Transmission: T56
Re: Stock LQ4...??
No clue but... If i was starting fresh again right now? I would DEFINITELY start with a 6.0 block and get the L92's, Aussie intake and cam of some wicked description hellls ya!!
04-02-2007, 11:06 PM
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Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
Re: Stock LQ4...??
SLP offers a kit now that has 64cc chambers (L92 heads). That should get the compression up...lol. Don't know how much, though. If I could get a good used 6.0 motor, I know what I'd do.
04-03-2007, 07:22 PM
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Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
Re: Stock LQ4...??
im going with a set of 59cc heads on a stock 6.0.
stock gasket yeilds 11.2xxxxxxxxx compression.
stock gasket yeilds 11.2xxxxxxxxx compression.
04-03-2007, 08:48 PM
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Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
Re: Stock LQ4...??
I'm planning to run right around 11:1 when I get to do the build. Along with a 234/236 .595/.598 cam on a 112 LSA. Should be pretty nice.
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