Head Gaskets

shiftysupra · 10-27-2008, 11:35 PM

The thicker the HG the less the compression becomes. Higher compression = more power, however with more compression you run the risk of detonation, which is why you would have to use higher octane fuel. ddmcse is right, you normally wouldn't buy the HG until the machine shop tells you how many (mm) they have removed total from the head and the block combined, then you buy a HG to compensate

btwilson86 · 10-28-2008, 12:07 AM

The above said is true on Naturally Aspirated motors... On vehicles with forced induction, such as the Turbo engines, having a slightly lower compression may be beneficial because more compressed air can be forced into the cylinder... However, finding the right compression is key, and getting a thicker gasket is not the way to achieve it. You'd want different pistons for that

10-28-2008, 12:07 AM	#2
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	The above said is true on Naturally Aspirated motors... On vehicles with forced induction, such as the Turbo engines, having a slightly lower compression may be beneficial because more compressed air can be forced into the cylinder... However, finding the right compression is key, and getting a thicker gasket is not the way to achieve it. You'd want different pistons for that __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

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10-27-2008, 11:35 PM	#1
shiftysupra 3" Exhaust Join Date: Jan 2006 Location: Arizona Posts: 96	The thicker the HG the less the compression becomes. Higher compression = more power, however with more compression you run the risk of detonation, which is why you would have to use higher octane fuel. ddmcse is right, you normally wouldn't buy the HG until the machine shop tells you how many (mm) they have removed total from the head and the block combined, then you buy a HG to compensate