Utec log
somthing weird, notice your load sites. you hit 90 then 100 breifly then back to 90 for awhile. Ime not sure what the zeros are after that, but i think once you hit 100 it should stay there. Then look at your knock count. notice your timing jump from 26 to 38?? (i think ime reading the right column) and look at the reduced MAF @ 7374. You let off the throttle. Mine shows a knock just like this when you abruptly let off the throttle at the end of a log. 7610 is probably your last log, after that you pulled off the throttle. But whats weird is that you were at load 90 for the last part of your log????? Nathan needs to chime in here.... RRR
That looks like shift knock to me. I wouldn't be too worried about it as you let out of the gas and it was only a 2 count at that high RPM.
What boost were you running when you took this log? It doesn't look like you were flowing enough air to stay right at 100% load.
Look at your stock ECU timing. It looks pretty happy for the most part, although I suggest bumping your knock thresholds up just a hair (like 2-3) in the 3-4000rpm ranges. Then I’d pull 1 degree of timing out of that area. Up top you might be able to get away with another degree or so.
What boost were you running when you took this log? It doesn't look like you were flowing enough air to stay right at 100% load.
Look at your stock ECU timing. It looks pretty happy for the most part, although I suggest bumping your knock thresholds up just a hair (like 2-3) in the 3-4000rpm ranges. Then I’d pull 1 degree of timing out of that area. Up top you might be able to get away with another degree or so.
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Remember that the load sites, 10-100% are MAF based by default unless you have the optional MAP sensor installed.
6858 +25.3 1712 100 100 00 +22.6 78.0 +12.8 -11.0 100.00 1506
Here you hit the 100% load column as you have a higher MAF frequency. I also expect at this point the turbo starts to roll off and that is why the MAF rolls back of and you go back into the 90% load column.
This is a good thing IMO. Having a little head room in the map means you have a safer map. If you over boost you have fueling and timing values in the 100% load column to cope with it.
Next thing. Yes that looks exactly like shift knock. The way to cure that is to lock down timing in the upper 0% column. Notice that during shifts you have the ECU take control of timing. I suggest you add timing in the 0% column up from around 6500, or the lowest rpm that you hard shift. Mirror the 100% column timing minus 3 degrees seems to work.
You should get a 3 bar MAP Sensor so you can also read boost in the UTEC. No only can you then use the UTEC boost controller, you can also play with using MAP as the load basis.
6858 +25.3 1712 100 100 00 +22.6 78.0 +12.8 -11.0 100.00 1506
Here you hit the 100% load column as you have a higher MAF frequency. I also expect at this point the turbo starts to roll off and that is why the MAF rolls back of and you go back into the 90% load column.
This is a good thing IMO. Having a little head room in the map means you have a safer map. If you over boost you have fueling and timing values in the 100% load column to cope with it.
Next thing. Yes that looks exactly like shift knock. The way to cure that is to lock down timing in the upper 0% column. Notice that during shifts you have the ECU take control of timing. I suggest you add timing in the 0% column up from around 6500, or the lowest rpm that you hard shift. Mirror the 100% column timing minus 3 degrees seems to work.
You should get a 3 bar MAP Sensor so you can also read boost in the UTEC. No only can you then use the UTEC boost controller, you can also play with using MAP as the load basis.
That looks like shift knock to me. I wouldn't be too worried about it as you let out of the gas and it was only a 2 count at that high RPM.
What boost were you running when you took this log? It doesn't look like you were flowing enough air to stay right at 100% load.
What boost were you running when you took this log? It doesn't look like you were flowing enough air to stay right at 100% load.
ABC is adjust to the minimum.
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Originally posted by mick_the_ginge
Remember that the load sites, 10-100% are MAF based by default unless you have the optional MAP sensor installed.
6858 +25.3 1712 100 100 00 +22.6 78.0 +12.8 -11.0 100.00 1506
Here you hit the 100% load column as you have a higher MAF frequency. I also expect at this point the turbo starts to roll off and that is why the MAF rolls back of and you go back into the 90% load column.
This is a good thing IMO. Having a little head room in the map means you have a safer map. If you over boost you have fueling and timing values in the 100% load column to cope with it.
Next thing. Yes that looks exactly like shift knock. The way to cure that is to lock down timing in the upper 0% column. Notice that during shifts you have the ECU take control of timing. I suggest you add timing in the 0% column up from around 6500, or the lowest rpm that you hard shift. Mirror the 100% column timing minus 3 degrees seems to work.
You should get a 3 bar MAP Sensor so you can also read boost in the UTEC. No only can you then use the UTEC boost controller, you can also play with using MAP as the load basis.
Remember that the load sites, 10-100% are MAF based by default unless you have the optional MAP sensor installed.
6858 +25.3 1712 100 100 00 +22.6 78.0 +12.8 -11.0 100.00 1506
Here you hit the 100% load column as you have a higher MAF frequency. I also expect at this point the turbo starts to roll off and that is why the MAF rolls back of and you go back into the 90% load column.
This is a good thing IMO. Having a little head room in the map means you have a safer map. If you over boost you have fueling and timing values in the 100% load column to cope with it.
Next thing. Yes that looks exactly like shift knock. The way to cure that is to lock down timing in the upper 0% column. Notice that during shifts you have the ECU take control of timing. I suggest you add timing in the 0% column up from around 6500, or the lowest rpm that you hard shift. Mirror the 100% column timing minus 3 degrees seems to work.
You should get a 3 bar MAP Sensor so you can also read boost in the UTEC. No only can you then use the UTEC boost controller, you can also play with using MAP as the load basis.
All these are new to me so lots of reading here...
Originally posted by ev8sive
Will a GM 3bar MAP sensor work just fine?
Will a GM 3bar MAP sensor work just fine?
Yes it will.
The pin-out for the external MAP sensor plug is in the back of the version 1.3 manual on our website.
www.turboxs.com/evoutecupdate.htm
-Nathan
www.turboxs.com
Just so everyone knows, GM Revised their part # for the map sensor, and if you get it from a salvage yard, there are 4 sensors available, a BARO sensor, 1 bar, 2 bar and 3 bar.. If you go to a auto parts store, you can get the MAP sensor and pigtail for a 89 Turbo Trans Am, I think the GMC Syclone also uses the same sensor. You'll also need the pigtail and a Molex 4 pin plug and recepticals if you plan on making your own (or snip the 12v plug off a junked ATX-P4 power supply, its the square 4 pin plug not the rectangular one)
If anyone is interested in part #'s you can order it from GMPartsDirect... PM Me if you need them. its not cheap, about $80 in parts.. Try a salvage yard if you can, but be careful, all the sensors look the same and you need to verify its a 3-Bar Most GM turbo cars had the 2 bar sensor.
If anyone is interested in part #'s you can order it from GMPartsDirect... PM Me if you need them. its not cheap, about $80 in parts.. Try a salvage yard if you can, but be careful, all the sensors look the same and you need to verify its a 3-Bar Most GM turbo cars had the 2 bar sensor.