lowering compression, on high compression map, lean, rich?
03-10-2005, 06:55 PM
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lowering compression, on high compression map, lean, rich?
hey guys, rebuilding my engine as we speak, b16 10.2:1 compression
im putting in 9:1 arias pistons, my car is tuned with hondata on previous stock compression. 450cc injectors with walbro255.
now my question is i want to take it straight ot the dyno, is my compression going to lean out my engine or richen it up too much taht i cant drive it to the dyno to tune?
where should my tuner start to go with my stock maps? high igniton? lower? retard more timing? fuel more or less on lower compression?
i just dont want to flood my rings on the way to the dyno. thanks guys.
phil.
im putting in 9:1 arias pistons, my car is tuned with hondata on previous stock compression. 450cc injectors with walbro255.
now my question is i want to take it straight ot the dyno, is my compression going to lean out my engine or richen it up too much taht i cant drive it to the dyno to tune?
where should my tuner start to go with my stock maps? high igniton? lower? retard more timing? fuel more or less on lower compression?
i just dont want to flood my rings on the way to the dyno. thanks guys.
phil.
03-10-2005, 07:00 PM
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Re: lowering compression, on high compression map, lean, rich? (NotPhilTran)
Your car should run a bit richer at all settings, nothing ground breaking or anything that will make the car undriveable. Too much emphasis is put on compression. The 9:1 setup will take a good amount more timing, so keep that in mind. I'd start from the 10.2:1 map and add some timing in. Boosted Hybrid posted on his board that going from 10:1 to 9:1 on a GSR took 5-6 degrees more timing, so keep that in mind.
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