Highest but safest compression ratio on 92 octane

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Jun 9, 2003 | 03:49 PM

ErikDaGenErik

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Joined: Sep 2002

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Highest but safest compression ratio on 92 octane

I have a JDM B18C in my EK and I have the basic bolt ons, I have the Skunk2 manifold (waiting for installation), and I have my cams too (also waiting). I know the next thing I'm going to want to do is raise the compression and get hondata for my car.

I don't want to have to buy race gas for daily driving, but whats the highest compression that I can use SAFELY with 92 octane. I believe the compression ratio I have right now is 10.8:1.

Jun 9, 2003 | 03:57 PM

poison

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Joined: May 2001

Posts: 10,753

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From: Where snow is, I am.

Re: Highest but safest compression ratio on 92 octane (ErikDaGenErik)

92 octane. I've seen people run 12.5:1 CR on 92 octane with the Ignition timing set at dead center with no pinging. We are also at 4600 elavation feet which would cause more of a detonation due to thinner air as well.

HTH.

Jun 9, 2003 | 04:03 PM

Kataku2K3

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Joined: Dec 2001

Posts: 5,418

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From: Gresham, Oregon, USA

Re: Highest but safest compression ratio on 92 octane (poison)

13.0:1... ~13.5:1 and above we run a 120/92 mix or just straight 120

Just remember TUNING is everything up there... Peace

Jun 9, 2003 | 04:41 PM

poison

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Joined: May 2001

Posts: 10,753

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From: Where snow is, I am.

Re: Highest but safest compression ratio on 92 octane (Kataku2K3)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kataku2K3 »</TD></TR><TR><TD CLASS="quote">13.0:1... ~13.5:1 and above we run a 120/92 mix or just straight 120

Just remember TUNING is everything up there... Peace</TD></TR></TABLE>

Whoa........now THAT'S some tuning!