safe compression?
Honda-Tech Member
Joined: May 2000
Posts: 6,094
Likes: 6
From: PASADENA, CA, USA
Re: safe compression? (freeshot350)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by freeshot350 »</TD></TR><TR><TD CLASS="quote">what kind of compression levels are safe and reliable for 91 octane?</TD></TR></TABLE>
it's all about tuning, but you can safely get away with 12.5cr on the streets with a good 91 octane tune.
By tune, I mean running an engine mangement system such as a Hondata or AEM EMS and taking to a well known engine dyno tuner.
it's all about tuning, but you can safely get away with 12.5cr on the streets with a good 91 octane tune.
By tune, I mean running an engine mangement system such as a Hondata or AEM EMS and taking to a well known engine dyno tuner.
MiG-21 superfan
Joined: Mar 2001
Posts: 8,628
Likes: 3
From: near the ocean, Moderator City, NJ
Re: safe compression? (freeshot350)
also taking precautions like polishing piston tops, running cold heat-range spark plugs with the proper nose (BKR7e-11 FTW), softening all hard edges in the combustion chamber, etc.
remember that a big cam will bleed off compression, so say your static compression math comes out to 12.5:1, but you are running a diesel cam- the compression when the engine is actually running (dynamic compression), especially in v-tech, will be somewhat lower
remember that a big cam will bleed off compression, so say your static compression math comes out to 12.5:1, but you are running a diesel cam- the compression when the engine is actually running (dynamic compression), especially in v-tech, will be somewhat lower
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