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347cu ~9.3:1 compression. 93 octane No meth. How much boost safely?

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Old 06-22-2011, 05:20 PM
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Default 347cu ~9.3:1 compression. 93 octane No meth. How much boost safely?

I've done a lot of reading, but I want to get some real world opinions on this proposed setup.

This is a S/C setup, not turbo. Forged 347, Ls6 block, built bottom end. Wiseco's, H-beams, ARP mains, ARP head studs with LS9 MLS gaskets.

Intercooled Vortech T-Trim in a C5
Calculated SCR 9:26:1
Calculated DCR 7.12:1
Cam has -1 degree overlap.

Like to run 93 octane, NO meth. What is safe in everyone's opinion. Boost, hp... what do you think. This will be with a GOOD tune.

Thanks
Steve
Old 06-22-2011, 06:06 PM
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id guess 15-18 lbs, im seein 15lbs pump gas with no meth on 10-1 compression
Old 06-23-2011, 06:17 AM
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I say 16lbs unless your planning to run a very very safe tune with 17-18lbs.
Old 06-23-2011, 07:36 AM
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Id say no more than 15lbs. annd just as important no more than 15 degrees of timing. What heads are you runing?
Old 06-23-2011, 07:57 AM
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I know they are not the best head by any means. But, CNC ported 241. With 2.055 1.60 SS valves. I ran them with my N/A combo and made good power for what they are. I am planning on having them freshened up. Basically at this point they are free since I've had them a long time.. lol

Have an -11 cc dish piston that gives that compression ratio.



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