lower compression on stock ecu

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500hpKA240sx
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lower compression on stock ecu

Post by 500hpKA240sx »

ok guys this seems like a stupid question but if I lowered compression from a 9.8:1 to a 8.8:1 would I have to have the ecu tuned? If you raise it you have to but for some reason I seem to remember seeing some people dropping compression on our ka's and driving around and breaking their engines in before they boosted them. I cant find anything on this question....getting frustrated
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Paul Walker- 1973-2013 Race In Paradise. you will be forever missed
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airman
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Re: lower compression on stock ecu

Post by airman »

Should be okay. You won't be able to fine tune the timing to make up for the lower compression, though obviously. Otherwise you'll be fine :) Don't know why I just now came across this post.
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500hpKA240sx
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Re: lower compression on stock ecu

Post by 500hpKA240sx »

awesome thanks man the compression ratio is 9.7 just found out and the closest pistons I could find were 9.1 so its pretty close and im having the head shaved so it should bump it up closer to 9.2:1. Ill post pics after the pistons come in and what not. doing a build for my gf's eclipse. and of course I over build everything lol. after this month I SHOULD be having the m90 on and running I need to have 2 pieces machined for the pulley set up and nobody will do it....
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Paul Walker- 1973-2013 Race In Paradise. you will be forever missed
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