280's Map
May 20, 2006, 10:12 PM
#61
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Bringing this back up as it is related to tuning drivability with cams.
Is there a decel fuel function of any sort? Maybe an RPM point that we can hopefully manipulate which will turn the injectors back on under decel. I think this might help out with the common "almost stalling" issues that people with bigger cams run into. For example, if that decel fuel RPM point is set at 1200 from the factory, bumping it up to 2500 may raise the point at which the RPM recovers - keeping it closer to the desired idle RPM value (instead of where it "catches itself" around 300 - 600 RPM).
Is there a decel fuel function of any sort? Maybe an RPM point that we can hopefully manipulate which will turn the injectors back on under decel. I think this might help out with the common "almost stalling" issues that people with bigger cams run into. For example, if that decel fuel RPM point is set at 1200 from the factory, bumping it up to 2500 may raise the point at which the RPM recovers - keeping it closer to the desired idle RPM value (instead of where it "catches itself" around 300 - 600 RPM).
May 20, 2006, 10:23 PM
#62
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Originally Posted by Noogles
you wouldn't be able to, thats why if your serious about learning to tune and doing is properly you should buy the right equipment.
at the very least you have to be able to log rpm, timing, and AFR. everything else would be a bonus.
at the very least you have to be able to log rpm, timing, and AFR. everything else would be a bonus.
May 21, 2006, 06:49 AM
#63
Originally Posted by ScrappyJack
Bringing this back up as it is related to tuning drivability with cams.
Is there a decel fuel function of any sort? Maybe an RPM point that we can hopefully manipulate which will turn the injectors back on under decel. I think this might help out with the common "almost stalling" issues that people with bigger cams run into. For example, if that decel fuel RPM point is set at 1200 from the factory, bumping it up to 2500 may raise the point at which the RPM recovers - keeping it closer to the desired idle RPM value (instead of where it "catches itself" around 300 - 600 RPM).
Is there a decel fuel function of any sort? Maybe an RPM point that we can hopefully manipulate which will turn the injectors back on under decel. I think this might help out with the common "almost stalling" issues that people with bigger cams run into. For example, if that decel fuel RPM point is set at 1200 from the factory, bumping it up to 2500 may raise the point at which the RPM recovers - keeping it closer to the desired idle RPM value (instead of where it "catches itself" around 300 - 600 RPM).
Actually it should be right under your nose.. Although a specific idle compensation or deceleration table is something I haven't seen yet, the entire area under 100% in the fuel and timing maps are "under vacuum"
At higher RPM, you'll rarely see the 10%-40% columns used except when your decelerating since engine vacuum on deceleration is higher than engine vacuum at low throttle inputs.. At idle, the 10%-20% column are likely vacuum levels higher than even stock idle.. (if you need to calculate, 1bar is the 100% column)
Its a calculated value, but below 100% I think the ECU utilizes information from the stock MAP sensor for engine vacuum...
Here's the trick though.. as idle gets poorer, the engine has less vacuum, so at idle the columns from 50% to 100% (approximately since it depends on conditions, Cams, restrictions, etc..) are where you could look to make those adjustments..
May 21, 2006, 06:53 AM
#64
Originally Posted by fsugatorbait
Most definitely. From what ive read they are only 45% done and project completion within 6 months or so. Can't freakin wait. 
The EVOLink project was stalled because the developer of DSMLink didn't have the time, or resources to extract a rom for research.. Now with the ability to read/write rom files for most OBD-II compliant mitsubishis, this opens a whole new world for him.
First, he has been "Socketing" early ECU's.. But the OBD-II Eclipse ECU's (95 and later) should now be able to be read and written to (given the right bootstrap code) Someone should contact him and tell him this product exists, and let him check it out. Plus, I haven't seen any talk on extracting the ECU data and flashing the 95 and later Eclipse ECU's yet.. So he probably can contribute there..
This tool changes many things in many ways.. Since the ECU shares alot with the Evo ECU, he'd be a great resource to get to participate.
May 21, 2006, 07:15 AM
#65
Originally Posted by MalibuJack
The EVOLink project was stalled because the developer of DSMLink didn't have the time, or resources to extract a rom for research..
Someone should contact him and tell him this product exists, and let him check it out.
Someone should contact him and tell him this product exists, and let him check it out.
Eric
May 21, 2006, 07:17 AM
#66
Originally Posted by MalibuJack
Actually it should be right under your nose.. Although a specific idle compensation or deceleration table is something I haven't seen yet, the entire area under 100% in the fuel and timing maps are "under vacuum"
At higher RPM, you'll rarely see the 10%-40% columns used except when your decelerating since engine vacuum on deceleration is higher than engine vacuum at low throttle inputs.. At idle, the 10%-20% column are likely vacuum levels higher than even stock idle.. (if you need to calculate, 1bar is the 100% column)
Its a calculated value, but below 100% I think the ECU utilizes information from the stock MAP sensor for engine vacuum...
Here's the trick though.. as idle gets poorer, the engine has less vacuum, so at idle the columns from 50% to 100% (approximately since it depends on conditions, Cams, restrictions, etc..) are where you could look to make those adjustments..
At higher RPM, you'll rarely see the 10%-40% columns used except when your decelerating since engine vacuum on deceleration is higher than engine vacuum at low throttle inputs.. At idle, the 10%-20% column are likely vacuum levels higher than even stock idle.. (if you need to calculate, 1bar is the 100% column)
Its a calculated value, but below 100% I think the ECU utilizes information from the stock MAP sensor for engine vacuum...
Here's the trick though.. as idle gets poorer, the engine has less vacuum, so at idle the columns from 50% to 100% (approximately since it depends on conditions, Cams, restrictions, etc..) are where you could look to make those adjustments..
Scrappyjack was referring to the 'coasting fuel cut', which is not in the fuel tables. The Mitsu ECU will shut of the injectors under no throttle deceleration. He is asking for a table that can set the RPM to where the injectors will come back on to a little higher value.
This is a setting in DSMLink, so I know it is possible to adjust. Someone just needs to find the address/table.
Eric
May 21, 2006, 09:14 AM
#68
Originally Posted by l2r99gst
MalibuJack,
Scrappyjack was referring to the 'coasting fuel cut', which is not in the fuel tables. The Mitsu ECU will shut of the injectors under no throttle deceleration. He is asking for a table that can set the RPM to where the injectors will come back on to a little higher value.
This is a setting in DSMLink, so I know it is possible to adjust. Someone just needs to find the address/table.
Eric
Scrappyjack was referring to the 'coasting fuel cut', which is not in the fuel tables. The Mitsu ECU will shut of the injectors under no throttle deceleration. He is asking for a table that can set the RPM to where the injectors will come back on to a little higher value.
This is a setting in DSMLink, so I know it is possible to adjust. Someone just needs to find the address/table.
Eric
May 21, 2006, 11:59 AM
#69
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Originally Posted by Noogles
Very Very True, I would never flaten both maps out, if anything i would detune the low octane map for an increased level of safety.
Yes I have a fuel Pump.
Yes I have a fuel Pump.
That would results in a lot of inconsistensy. In my case, my car switches maps even on 110oct@30psi making me loose around 20whp on top. 11.30AFR's sometimes it pisses me off
. And timing gets retarted about 4 degrees and starts building again. I understand this is safety. But sometimes I think its a little bit too sensitive. Im trying to find a way around it without having to flatten the maps out. Looking for the source of it... Am I blowing spark? Is my dumptube hitting my lowerpipe creating lots of extra engine noise? Is my Knock sensor just overly sensitive? Lots of possibilities but im sure mitsu exaggerated when it came to knock safety. Didnt someone mentioned JDM evos come scaled at 550cc USDM at 513? resulting in a very rich overly safe tune.
May 21, 2006, 12:06 PM
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Originally Posted by l2r99gst
MalibuJack,
Scrappyjack was referring to the 'coasting fuel cut', which is not in the fuel tables. The Mitsu ECU will shut of the injectors under no throttle deceleration. He is asking for a table that can set the RPM to where the injectors will come back on to a little higher value.
Scrappyjack was referring to the 'coasting fuel cut', which is not in the fuel tables. The Mitsu ECU will shut of the injectors under no throttle deceleration. He is asking for a table that can set the RPM to where the injectors will come back on to a little higher value.
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