forged 347 w/ 9.5:1 & boost?
forged 347 w/ 9.5:1 & boost? I know roughly 8 psi is about the most you want on a stock bottom end car without running meth. How much could a person run with a forged bottom end and 9.5:1? running no meth.
8 sec potential, 12 sec slip
iTrader: (50)
Joined: Apr 2002
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From: Savannah, GA
I'm running 14~15psi on my 9.5:1 forged 347. No problems here. I am using meth now with the F1, but before when I had the P1, I had it maxed out and it would make 14psi without the hat and filter on and no meth. Just make sure your tune is good.
8 sec potential, 12 sec slip
iTrader: (50)
Joined: Apr 2002
Posts: 4,092
Likes: 2
From: Savannah, GA
Why anyone would do any sort of FI without an intercooler is beyond me. Seriously, why skimp on an intercooler. Only way I'd not run an IC is if I was only running 4~5#
Some poeple run meth as there intercooler, mostly in drag applications. Also at low boost 6-7 psi and meth without an intercooler shouldn't be a problem. Its all in the tune and whatever goals you have.
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Going to run 15-18psi on mine with meth and large intercooler...
Motor details
347ci, Eagle LS1 6.125" rods, Diamond -8.6 dish pistons, stock crank, new LS6 block, ARP head studs, custom Comp Cam 226/232 116LSA, Texas speed CNC LS6 stage 2.5 heads 2.04in 1.575 ex valves that I took apart and hand finished, Kooks 1 7/8" headers, ECS dual nozzle meth kit, ported Weiand intake, 9.5:1 compression
Motor details
347ci, Eagle LS1 6.125" rods, Diamond -8.6 dish pistons, stock crank, new LS6 block, ARP head studs, custom Comp Cam 226/232 116LSA, Texas speed CNC LS6 stage 2.5 heads 2.04in 1.575 ex valves that I took apart and hand finished, Kooks 1 7/8" headers, ECS dual nozzle meth kit, ported Weiand intake, 9.5:1 compression
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TECH Resident
Joined: Jan 2007
Posts: 751
Likes: 0
From: Texas
Truer words cannot be spoken....I'm running 10.1:1 at 9-10 psi with conservative tune & engine has been very responsive & reliable 
