First dyno... thoughts?
10-05-2016, 08:25 AM
#16
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It looks like you're only boosting up to 14 psi, so it's not going to have the 'turbo surge' type of powerband.
Can I assume the boost solenoid PW table gives you max boost when it's set to 100 and lowest boost at 0? If so, I'd set the entire row at 101 and 124 kpa to 100, then set the 147kpa row to 60.
The timing map looks crude, I'm not sure why it's flat from 2700rpm and up.
Can I assume the boost solenoid PW table gives you max boost when it's set to 100 and lowest boost at 0? If so, I'd set the entire row at 101 and 124 kpa to 100, then set the 147kpa row to 60.
The timing map looks crude, I'm not sure why it's flat from 2700rpm and up.
10-05-2016, 02:19 PM
#17
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what gear did you dyno it in? using a lower gear will allow for too fast an acceleration which shows up as less responsive turbo.
10-05-2016, 02:26 PM
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BTW - you may consider changing the VE table a bit. I typically tune the TECs to make a 12:1 afr through out the load / rpm range with the base fuel curve (TOG / IOT) and then take out approx 25% in off boost areas to bring that back to 14.7:1. That way the base fuel curve is linear for one mixture. Other wise you will have to have more VE adjustments for the change in AFR desired. Done correctly the VE once on boost should have very little adjustments and the VE below 100 kpa should be close to -25 across the board (except close to idle where things always get a little odd!)
10-05-2016, 02:47 PM
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10-05-2016, 02:56 PM
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BTW - you may consider changing the VE table a bit. I typically tune the TECs to make a 12:1 afr through out the load / rpm range with the base fuel curve (TOG / IOT) and then take out approx 25% in off boost areas to bring that back to 14.7:1. That way the base fuel curve is linear for one mixture. Other wise you will have to have more VE adjustments for the change in AFR desired. Done correctly the VE once on boost should have very little adjustments and the VE below 100 kpa should be close to -25 across the board (except close to idle where things always get a little odd!)
First I was going to add a little more fuel under 3500 once I'm in boost and see how that behaves. Then maybe pull some timing...
10-05-2016, 03:17 PM
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10-05-2016, 03:24 PM
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its a balancing act - dropping out some timing will raise the egts, but it will also dampen the response of the engine. So on a long pull it will help, but on actually drivablity it may make it less responsive to immediate throttle input. As you exit a corner on the rack and mash the throttle you will get a little less initial power as the MAP goes to 100kpa (wide open throttle no boost yet) but then it will spool quicker and eventual make more power faster.....I hate the slight 'dead spot' - you may need a lot of trail ad error to make it as smooth as possible.
10-05-2016, 05:36 PM
#26
