Thanks for the reply, though it doesn't really help in mapping the strategy of Lotus ECU.
With only two pages of threads in this sub-forum, there isn't much info to pick through.
Quote:
Originally Posted by charliex
i use the same target AFR's as the factory does
..........the AFR targets achieved are from 3 years of hard work.
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Your quote is a conflict. 3 years of hard work I'm not doubting. Your ability to crack the ECU, understand the code, and successfully rewrite it cannot go without significant applause.
That said, it's a good idea to not confuse your software success with holistic engine management wisdom. Just because Lotus chose data "X" doesn't make it relevant. Now, that said, it's probably not unwise to assume Lotus sets the AFRs for their factory boosted applications at a safe and reasonable level; I'm just not one to take it for granted. Based on how many Loti you've flashed and how many track their cars, it makes a good case that the 2ZZ-GE indeed has good mechanical quench and can operate close to peak torque AFR as a boosted application. You also have to admit the BMEP is generally pretty low compared to other boosted 4-cylinders out there, so that helps in not needing safe-rich AFRs.
Quote:
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Originally Posted by charliex
do me a favour and before you start saying stuff isn't correct, or i'm not showing the best examples, find out whats going on first
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Ok, let's calm down here. I commented in my initial question here in this thread that I was assuming pre-cat [like all proper AFR data is gathered]. Chassis dyno facilities that use tailpipe sniffers are just providing a poor estimation. The fact is your website examples isn't providing accurate information regarding your AFR targets. Surely you have some better representations of your work.
Can anyone help in figuring out the Lotus ECU's operational strategy? We know it's MAF with a narrowband O2, but what other sensors are there? Knock, IAT, ECT, atmospheric pressure? Any help is appreciated!