Methanol Cold Start

General Tuning Questions And Discussions
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Holden202T
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Re: Methanol Cold Start

Post by Holden202T »

i'd also change the injector rate to .040 then .... the figure i get for 60lb injectors and methanol in a v6 is .039 so your probably on the slightly lean side with that too. i dare say change the injector rate and set the idle afr's and use a stock v6 VE table and it should be pretty close.

4.5 is probably a bit rich for the stock idle afr settings, should be low to mid 5's .... either way you have a direction to go in now anyways.

don't you just love cold tuning :P only get a small window to get it right too!! .... i've found though if you leave all the AFR tables where they are for petrol and just offset them for methanol then get the engine warmed up once it is tune the VE table to get the wideband matching commanded and it should be right when its cold then, and if its not then you can tweak the cold afr tables if needed.
v6bucket
Posts: 765
Joined: Tue Jul 21, 2009 10:02 am

Re: Methanol Cold Start

Post by v6bucket »

A couple of steps forward, 1/2 a dozen backwards. With some major adjustments I've got it to start OK, & run at an acceptable level. It's still richer than I like at the moment, but I'll sort that. Got go to work again.
"Definition of a Drag Racer: A person who spends money he doesn't have on parts he doesn't need to impress people he doesn't know." - Grumpy Jenkins----- Poverty---
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Holden202T
Posts: 10394
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
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Re: Methanol Cold Start

Post by Holden202T »

Rich is safe: P
v6bucket
Posts: 765
Joined: Tue Jul 21, 2009 10:02 am

Re: Methanol Cold Start

Post by v6bucket »

Once it warmed up it was idle around 5.5-5.6 which is only filling the sump with methanol. I now have it in the low 6s. When it first fire up it was running around 3.7-3.9 till it warmed up a bit. Here's a log, unfortunately the AFR didn't record correctly as I had the wrong numbers in the "wideband 0v &5v" fixed part way through. I also turned something on with the knock sensing, as it's showing knocks counts & knock retard.
What is "single fire option" & "sync pw< min flag" that has been set in Flags?
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"Definition of a Drag Racer: A person who spends money he doesn't have on parts he doesn't need to impress people he doesn't know." - Grumpy Jenkins----- Poverty---
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