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#1
01-19-2006, 11:53 PM
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Raising compression
Hey, i'm rebuilding my motor with new forged pistons, and i have a choice with stock compression or 8:5:1 on my VR4. The only turbo upgrade i have planned is a 13G\9b combo so will i be able to safely run with this setup? sorry i dont know too much about technicallities on tuning
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1991 Mitsubishi 3000GT VR4 Twin Turbo- Forged Ross Pistons,Forged Crank,Forged and Shotpeened Rods,Stillin DP,K&N FIPK,Greddy Type-RS BOV,Magnacor Wires,Aluminum Y-Pipe,EGR Blocked,All Gutted Cats,Greddy Turbo Timer,Blitz Boost Guage,Autometer A\F Guage,Solid Shift Bushings,Red Top Batt,ACT 6 Puck Clutch,Free Boost Mod,99 Front End Conversion 
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#2
01-20-2006, 12:33 PM
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Re: Raising compression
Well that is barely a turbo upgrade, so 8.5:1 would easily be fine. You have a 91, so datalogging for knock won't be hard, so you could even go bigger on the turbos quite easily. I'd say go for it.
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96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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#3
01-20-2006, 08:21 PM
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Re: Raising compression
aight cool, thanks, another quick question, Will boring out my cylinders 0.70 over require larger headgaskets? the stock headgaskets are 92mm right? Do yall think i will need the bigger ones that 3sx sells?
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1991 Mitsubishi 3000GT VR4 Twin Turbo- Forged Ross Pistons,Forged Crank,Forged and Shotpeened Rods,Stillin DP,K&N FIPK,Greddy Type-RS BOV,Magnacor Wires,Aluminum Y-Pipe,EGR Blocked,All Gutted Cats,Greddy Turbo Timer,Blitz Boost Guage,Autometer A\F Guage,Solid Shift Bushings,Red Top Batt,ACT 6 Puck Clutch,Free Boost Mod,99 Front End Conversion
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#4
01-23-2006, 03:02 PM
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Re: Raising compression
I honestly don't know. Why not give them a call and ask?
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96 3000gt vr4 -K&N FIPK -Proboost mbc -Cusco front + rear strut bars -Greddy type-s -ATR downpipe -no cats -15Gs, 3sx aluminum pulley, FMIC, SAFC, walboro pump, EVO 560ccs, and Meth Injection Kit all waiting to go in shortly. Your 1996 Mitsubishi 3000GT VR-4 is the 92nd out of the 315 that were made that year. Only 21 of which are exactly identical.
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#5
01-23-2006, 04:00 PM
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Re: Raising compression
^ you could make up a t3/t4 hybrid turbo (I'm assuming that 9b's are t3s) which'll give you t/4 power with a quicker spool.
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Georgey on the subject of midget beastiality pornos Quote:
R.I.P Andy, you will be missed by all.
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#6
01-23-2006, 04:07 PM
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Re: Raising compression
Quote:
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A few "bolt on" mods, a couple "cut, smash, hammer, weld, etc" mods, and a couple "why the hell do I need this/what the hell is this" weight reductions.
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