Highest Compression Ratio On Pump Gas?

[imported_sleepin_civic]

hey i was in the process of building an n/a b20vtec. i mainly just wanted to know on 93 octane what would be recommend max compression ratio that it will not detinate or damage anything. also i hear that the b20 blocks are pretty weak what can i do that will help the chance of a sleeve cranking. i hear that block gurdles are for sure. has anyone ever used a block guard. is it even worth it??? im also thinging that an oil cooler would also help. if you can think of anything that might help please post thanks.

[dubcac]

How high compression you can run depends on how much you want to spend in tuning and engine management. The general rule is around 12:1 compression, but higher can be run with a Hondata or AEM EMS, or something of the sorts.

[Calesta]

The B20 sleeve isn't "really weak".. it's just a different design than the B18 and slightly weaker... maybe. Just build it right and you'll be fine. My B20/VTEC lasted for 45k miles until I blew a ring, and that was running 12.6:1 compression on 93 octane and revving to 8500 countless times per day.