402 10.8:1 pump gas boost possible?
02-24-2013, 11:03 AM
#1
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402 10.8:1 pump gas boost possible? I have a ls2 402 stroker in my c5z its about 10.8:1 compression.
Eagle Crank/Rods/Diamond -15cc pistons/ARP everything
RPM small bore CNC LS7 heads. 60cc
RPM Ported LS7 Intake/ 96mm NW Throttle body
236-248 .648/651 114lsa
ARH 1 7/8 headers no cats.
powerbond ud pulley
diamond stage 2 clutch/ Light flywheel
ls7 rail/injectors
ls7 rockers trunion upgrade
Halltech air intake
Evans Water pump
So I have been talking with Huron Speed about doing a custom twin rear mount turbo kit for my car. Something in the 62-70mm range. I only really planned on running maybe 7-10lbs to start with. Uping the boost later when all the rest of my part can handle more power.
I was thinking about swapping to a stock ls3 topend to get me into the 10:1 range. But I am thinking if i was just running low boost this year anyway can i get away with it for now then swap out the top end later when all my drivetrain parts are rated for the big numbers. Im not very weathered in boost knowledge but i see ls7 stock bottom ends running 6-8lbs all the time so i figured it was pretty doable.
It would be tunned by either Turbo Tech or Tom wong.
Eagle Crank/Rods/Diamond -15cc pistons/ARP everything
RPM small bore CNC LS7 heads. 60cc
RPM Ported LS7 Intake/ 96mm NW Throttle body
236-248 .648/651 114lsa
ARH 1 7/8 headers no cats.
powerbond ud pulley
diamond stage 2 clutch/ Light flywheel
ls7 rail/injectors
ls7 rockers trunion upgrade
Halltech air intake
Evans Water pump
So I have been talking with Huron Speed about doing a custom twin rear mount turbo kit for my car. Something in the 62-70mm range. I only really planned on running maybe 7-10lbs to start with. Uping the boost later when all the rest of my part can handle more power.
I was thinking about swapping to a stock ls3 topend to get me into the 10:1 range. But I am thinking if i was just running low boost this year anyway can i get away with it for now then swap out the top end later when all my drivetrain parts are rated for the big numbers. Im not very weathered in boost knowledge but i see ls7 stock bottom ends running 6-8lbs all the time so i figured it was pretty doable.
It would be tunned by either Turbo Tech or Tom wong.
02-24-2013, 11:42 AM
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There is only one E85 station about 30 miles from me so not really a viable option. Meth is doable but Was just wodering if i could get away on the 92oct pump. low boost threw my setup should make some pretty good numbers for this summer. Let it eat next year.
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02-26-2013, 01:46 PM
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10-12 psi should be safe on pump gas with proper tuning and you could always run a meth for safety. I'm building a iron 346 10.5:1 comp w/ S480 and plan to do the same.
