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Which means "Evil Twin". Lets see your projects where you change boring into fun or create the fun from scratch.
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PostPosted: Tue Jan 20, 2015 4:05 pm 
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This talk of motor mounts and brakes and throttles and ECU setup plans.....very exciting because it means I'm preparing to move on to normal engine swap type stuff :D


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PostPosted: Tue Jan 20, 2015 6:53 pm 
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ooooo...gold hardware :)


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PostPosted: Tue Jan 20, 2015 9:17 pm 
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Some fit ups today to see where I am and what needs what exactly


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PostPosted: Wed Jan 21, 2015 9:57 am 
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Ooooh I likey!


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PostPosted: Wed Jan 21, 2015 10:54 am 
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Pizzaman wrote:
Ooooh I likey!


I'm getting there.

I had to order another bearing for the trans shaft today...it looks like way back I only bought 1 to see how it would work but now that I want to actually put it together I 2. $40 on ebay and here in a few days.


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PostPosted: Wed Jan 21, 2015 3:07 pm 
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mk e wrote:
a1exander wrote:
Heard the expression "the devil is in the detail"?


I have :)

The detail I'm pondering now is how the ECU senses load. I'd planned to use MAP (speed-density) load sensing because it tends to be more sensitive to idle/off idle conditions but something has been troubling me and today I realized what it is.... the way it's done in this ECU (motec M150) barometric changes will affect the calculated load. That means that even if the throttle is wide open and I mean full power, if the ECU sees say 90kpa it will call it 90% load and use the mixture, ignition timing and fuel timing that goes with 90% load. It's perfectly safe but 100% throttle won't always deliver 100% power so that gets the wrong stamp.


I'm going to pirate that stamp and make very good use of it.

GM has solved this problem in production computers since the 1980's... What's wrong with MoTeC that they can't figure this out?
GM has parallel conditions set. MAP/MAF is the primary load indicator for most operating conditions, BUT when the throttle goes beyond a certain percentage (and there's a table so that this % can vary with RPM) the controller enters "power enrichment" (PE) mode. This means that closed loop fuel trim updates are disabled (the trims are still used in the fueling calculation), commanded AFR goes from stoich to the PE AFR, ignition timing tables are adjusted, etc.

It boggles my mind that most aftermarket computers don't have this. I read a topic on the Megasquirt forum a while back in which someone was asking for a system action analagous to PE mode, and no one had any clue what he was talking about.


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PostPosted: Wed Jan 21, 2015 5:34 pm 
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TheDarkSideOfWill wrote:
I'm going to pirate that stamp and make very good use of it.

GM has solved this problem in production computers since the 1980's... What's wrong with MoTeC that they can't figure this out?
GM has parallel conditions set. MAP/MAF is the primary load indicator for most operating conditions, BUT when the throttle goes beyond a certain percentage (and there's a table so that this % can vary with RPM) the controller enters "power enrichment" (PE) mode. This means that closed loop fuel trim updates are disabled (the trims are still used in the fueling calculation), commanded AFR goes from stoich to the PE AFR, ignition timing tables are adjusted, etc.

It boggles my mind that most aftermarket computers don't have this. I read a topic on the Megasquirt forum a while back in which someone was asking for a system action analagous to PE mode, and no one had any clue what he was talking about.


That one of my favorites :)

Motec lets you use a secondary table for mixture so you can correct that for the correct load regardless of baro when using MAP or MAF load sensing.....but TPS load sensing solves the problem other than making tuning a bit harder.

In the past I've used TPS load then plug the the baro input that is needs for mixture correction into a MAP to get WAY more sensitivity at low power and the new motec recommends that so I know they know the right answer....but MAP tuning is easier and most people will never understand why it's wrong.

They could have done MAP/Baro to get load but too much thinking I guess.

MS does somehting weird. If you don't add the baro sensor it goes way lean driving up a mountain and they all thing thats normal. but it you stop and reset the mixture becomes normal again. The only thing I can thing is they sample baro at startup and are doing a MAP/baro thing somewhere in the math....so adding a real baro fixes the issue. So they might already have a stable load calc. Just guessing though.


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PostPosted: Wed Jan 21, 2015 9:53 pm 
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A little drop gear progress.

I made a little spacer to sit behind the lower bearing to move it to a location I'm happier with. I adjusted the spacer that positions the gear for the same reason and both the bearing and gear now sit where they should.

With that done I bored the idler gear bearing pocket to size and depth so that should be right now.

Next up with be to throw the cover on and pop holes in it where I need to add new bearing bosses...another day though.


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PostPosted: Thu Jan 22, 2015 3:02 am 
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I really am constantly amazed at your versatility.

Every time I measure to make a bracket or some oddment I invariably get it wrong and have to re do it, and here you are going crazy on the case.


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PostPosted: Thu Jan 22, 2015 10:48 am 
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a1exander wrote:
I really am constantly amazed at your versatility.

Every time I measure to make a bracket or some oddment I invariably get it wrong and have to re do it, and here you are going crazy on the case.


You must have joined last and missed all the sawzalling casting that happened in the beginning of the project :lol:

I need to make a flow chart of this project.....it's pretty the poster child for "scope creep" since this entire thing started when I set out to replace a malfunctioning ECU :oops:


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