Daytona Twin-Tech TCFI tuning

[nmandic]

Originally Posted by masstch

Anyone with a Gen III yet? Gen III ECM
I'm looking to get one soon. Would like to hear some feedback on it.

What are the improvements over 2D? Does it tune advance curves?

[AirGlider]

My understanding is the only difference is it will record 1 hours worth of data.

AG

[chunngle]

Has anyone experienced a communication error while in live view? I get a "can not establish RS-232 link. Check cable & module power" message and the program freezes up occassionally while in live view. This is an intermittant error message. I can not track it to any specific time frame. It seems to do it at different temps and length of running time. I am able to communicate just fine with the data and log file downloading and uploading. The bike is running great and the DTT appears to be doing it's thing. It just seems to affect the live view. I have called and talked to Chris and his answer was a noise problem with the bike. I have changed out the plugs and plug wires and no change. I am thinking possibly a sensor such as the crank sensor or TP sensor. Does anyone have any ideas or suggestions? I know someone will have the answer. Thanks.

[Dogwood]

For me, the green wire that DTT supplies has too short of a pin on it, this is the for the plug side.
When I get that message/error, I have to push the green wire into the plug to get it to make contact on the connector of the USB cable.

[nmandic]

Have some difficulties with the starting the engine, however, if I give some throttle it will start without a problem. What adjustments are needed in the parameters to address this (i.e., equivalent of having more throttle)?

NM

[bbrowncods]

Originally Posted by nmandic

Have some difficulties with the starting the engine, however, if I give some throttle it will start without a problem. What adjustments are needed in the parameters to address this (i.e., equivalent of having more throttle)?

NM

Does it start and run for 3-4 seconds and then die? If that is the case it is too lean. Increase the Cold Start Enrichment Tables. Also the Priming and Cranking tables may need adjusting. Usethe procedures outlined in the DTT Tuning PDF.
If it doesn't start at all there is not enough air. The tables to correct this are the IAC Start Adder Tables.
A third area would be to determine what blocks the "IAC Based TPS Adder Table" is using and increase those values.

[nmandic]

Originally Posted by bbrowncods

Does it start and run for 3-4 seconds and then die? If that is the case it is too lean. Increase the Cold Start Enrichment Tables. Also the Priming and Cranking tables may need adjusting. Usethe procedures outlined in the DTT Tuning PDF.
If it doesn't start at all there is not enough air. The tables to correct this are the IAC Start Adder Tables.
A third area would be to determine what blocks the "IAC Based TPS Adder Table" is using and increase those values.

Thanks man. No it doesn't start at all. Actually it behaves as if the compression releases haven't been pressed so it kicks back. Also, a bit of smoke comes out of the filter (sometimes with popping as if it was lean). If I open a throttle however it tends to start.

How do you determine what blocks the "IAC Based TPS Adder Table" is using? I note that the values in ET / Time Based IAC Start Adder Table(s) are higher than I used to have back on 114"? To INCREASE air - do you increase or decrease the values in the tables?

NM

[bbrowncods]

Originally Posted by nmandic

Thanks man. No it doesn't start at all. Actually it behaves as if the compression releases haven't been pressed so it kicks back. Also, a bit of smoke comes out of the filter (sometimes with popping as if it was lean). If I open a throttle however it tends to start.NM

Go through the Idle Tuning tech Note step by step. You have a big engine so the settings that are off the downloads are going to be too low. Based on what you have told, it runs good but you just have problems starting, correct?. Here is where I would start.
1. Basic parameters. Set Cranking revs to 1. Helps on the kickback on starting.

Originally Posted by nmandic

How do you determine what blocks the "IAC Based TPS Adder Table" is using? I note that the values in ET / Time Based IAC Start Adder Table(s) are higher than I used to have back on 114"? To INCREASE air - do you increase or decrease the values in the tables?

2. "Increase" the ET Based IAC Start Adder Table by 10% at the temp setting that you are having troubles with. You can tell the AFR and IAC values at start by turning the ignition on and waiting 1 minute and then turn on the RUN switch and attempt a start or two. Then download the log file. In the TCFI Log software there is a "Edit" button in the top left corner when you are viewing the data. You will be able to see the TPS block that is being used during the start (typically the 2.5% or 5.0% block @ 1250 or 1500 rpm in the Alpha-N table). It will be lean. I would increase fuel with these blocks by 2 (ie 32.0 to 34.0) and retry.
3. Just keep increasing the IAC and fuel until it starts and runs. Then follow the DTT instructions to fine tune.

[nmandic]

Originally Posted by bbrowncods

Go through the Idle Tuning tech Note step by step. You have a big engine so the settings that are off the downloads are going to be too low. Based on what you have told, it runs good but you just have problems starting, correct?. Here is where I would start.
1. Basic parameters. Set Cranking revs to 1. Helps on the kickback on starting.


2. "Increase" the ET Based IAC Start Adder Table by 10% at the temp setting that you are having troubles with. You can tell the AFR and IAC values at start by turning the ignition on and waiting 1 minute and then turn on the RUN switch and attempt a start or two. Then download the log file. In the TCFI Log software there is a "Edit" button in the top left corner when you are viewing the data. You will be able to see the TPS block that is being used during the start (typically the 2.5% or 5.0% block @ 1250 or 1500 rpm in the Alpha-N table). It will be lean. I would increase fuel with these blocks by 2 (ie 32.0 to 34.0) and retry.
3. Just keep increasing the IAC and fuel until it starts and runs. Then follow the DTT instructions to fine tune.

Well ... this is what I'd call a nice lesson / tip on TCFI.

I'll do these (have already feeling that's what I need). In the mean time really appreciated.

[todd comer]

Would setting the cranking rev's to 1 help especially with a large TB on 98" motor?

[bbrowncods]

Originally Posted by todd comer

Would setting the cranking rev's to 1 help especially with a large TB on 98" motor?

Yes. What the setting does is allow one revolution (if set to 1) of the motor before the spark plug fires. This would prevent the scenario where the starter engages just prior to a cylinder being at TDC and firing before it has a chance to get the rpm and momentum built up; causing a kickback. Especially useful when hot!

[todd comer]

Originally Posted by bbrowncods

Yes. What the setting does is allow one revolution (if set to 1) of the motor before the spark plug fires. This would prevent the scenario where the starter engages just prior to a cylinder being at TDC and firing before it has a chance to get the rpm and momentum built up; causing a kickback. Especially useful when hot!

Thanks for useful information.Will try raising to 1 and see what happens.

[FLSTCI124"]

Curtis,

I'm still having issues with mine concerning lock-up on initial start and definitely gear-grinding vicious sounding kickback on hot-start attempts...

Gonna try setting mine to spin over 3 times and see if that helps.

Also, I notice lots of red all over the place:

IAC Based TPS Adder Table, ET Based Primary Fuel Pulsewidth, ET Based Cranking Fuel Pulse Width, ET Based AFR Cold Start Enrichment Adder Table, ET Based Front & Rear Cylinder Cold Start Enrichment Adder Tables, ET Based Idle RPM Tables, ET Based IAC Position Tables, ET Based IAC Start Adder Tables

I don't want to blindly screw things up...

Still waiting on the RB 2-1. Maybe my Scorpio-Santa will be even nicer this year? LOL!

I see that DTT as a new section on their site and states that if you can stick a broom-stick up your pipes your wrong... They recommend placing a 2-inch washer about 2" up your exhaust (Like butter-fly valves basically) so exhaust back-pressure can be adjusted.
Currently working on that project.

[Curtis Shipp]

Originally Posted by FLSTCI124"

Curtis,

I'm still having issues with mine concerning lock-up on initial start and definitely gear-grinding vicious sounding kickback on hot-start attempts...

Gonna try setting mine to spin over 3 times and see if that helps.

Also, I notice lots of red all over the place:

IAC Based TPS Adder Table, ET Based Primary Fuel Pulsewidth, ET Based Cranking Fuel Pulse Width, ET Based AFR Cold Start Enrichment Adder Table, ET Based Front & Rear Cylinder Cold Start Enrichment Adder Tables, ET Based Idle RPM Tables, ET Based IAC Position Tables, ET Based IAC Start Adder Tables

I don't want to blindly screw things up...

Still waiting on the RB 2-1. Maybe my Scorpio-Santa will be even nicer this year? LOL!

I see that DTT as a new section on their site and states that if you can stick a broom-stick up your pipes your wrong... They recommend placing a 2-inch washer about 2" up your exhaust (Like butter-fly valves basically) so exhaust back-pressure can be adjusted.
Currently working on that project.

E-mail me your map and let me take a look. Send it with the red.

[FLSTCI124"]

Just sent it to you. After riding for a bit and coming to a stoplight / sign, the idle drops below 1k too.

Some of the blocks are light blue also?

Been getting some codes too, CKP sensor, Low WEGO, etc...

PO373 - CKP Signal Lost

PO134 - Front WEGO Low / Open

PO505 - IAC Low

Turn signals don't cancel either which I see others are having that issue.

Where in AL do you live? If you tune for a living I'd be willing to bring her up and let you do your thing hands-on.