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02-21-2010, 11:44 AM | #1 |
Drives: Vitz RS Turbo Join Date: Nov 2008
Location: ML
Posts: 576
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Compression Question...
*For d ones who don't know* I own a yaris 2001 with a 1NZFE turbo engine.
I had seen many threads showing built 1NZFE engines for turbo through out my research and I noticed that many of them use CP pistons or other brands with a compression ratio of 9.5:1. Well mine seems to be the only 1NZ with 8.5:1 compression arias pistons... From the beginning of my project I always had\have issues in slow running and idling so I am suspecting if these issues might be due to the lower compression |
02-22-2010, 01:12 AM | #2 |
Learn to Relax
Drives: 2007, Meteorite, LB Join Date: Dec 2008
Location: Anaheim, CA
Posts: 2,070
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What happens if you raise you idle a little? Maybe you have other issues, like valve problems?
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02-22-2010, 01:30 AM | #3 |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
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mine are 9:1 -- I'm pretty sure. Your car should idle ok.
__________________
Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
02-22-2010, 04:36 AM | #4 | |
Drives: Vitz RS Turbo Join Date: Nov 2008
Location: ML
Posts: 576
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Quote:
When slowly pushing the gas from 2000 till 3000rpm, the engine knocks several times. After 3k rpm kicks in VVTI & boost and the engine shows us real performance till 6500rpm. I know some should say it's a tuning problem and maybe it is... but it's really hard to get it stable within 2K-3K rpm range especially when you try to lean it out more than 10.5 AFR |
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