Injected Performance brings you HALTECH PLATINUM PNP STANDALONE
09-08-2008, 05:14 AM
#441
Hal, related boost controller question: since the boost controller oscillates at 30 Hz (to my recollection), then setting the overboost fuel cut to anything less than 35 ms may be likely to cause problems since the solenoid potentially may not yet have had an opportunity to bring boost down? Is that correct?
My overboost "delay" is set to 5 ms, which I think is too short. I think it would be better to increase this to say 40 ms and bring the psi value down a little bit (rather than inflating the psi value to compensate). Thoughts? Ideally a boost solenoid that operates faster than 30 Hz would be nice. Do any exist?
My overboost "delay" is set to 5 ms, which I think is too short. I think it would be better to increase this to say 40 ms and bring the psi value down a little bit (rather than inflating the psi value to compensate). Thoughts? Ideally a boost solenoid that operates faster than 30 Hz would be nice. Do any exist?
Last edited by rcdash; 09-08-2008 at 05:16 AM.
09-08-2008, 05:52 AM
#442
'Over boost delay' refers to how long you must be above the 'boost cut threshold' before it implements a fuel cut. This is helpful when you have mild spikes etc in a map sensor, as to not trigger the over boost cut.
'Boost restore pressure' refers to the manifold pressure the ecu must see before restoring fuel.
I typically run a 100-300ms over boost delay, so a tiny spike won't trigger the over boost cut. I set the boost restore pressure low enough that the car hits a "brick wall" to let the driver know something is wrong (waste gate line came loose, etc). If over boost is 150kpa, my boost restore would be 50-100kpa.
'Boost restore pressure' refers to the manifold pressure the ecu must see before restoring fuel.
I typically run a 100-300ms over boost delay, so a tiny spike won't trigger the over boost cut. I set the boost restore pressure low enough that the car hits a "brick wall" to let the driver know something is wrong (waste gate line came loose, etc). If over boost is 150kpa, my boost restore would be 50-100kpa.
Originally Posted by rcdash
Hal, related boost controller question: since the boost controller oscillates at 30 Hz (to my recollection), then setting the overboost fuel cut to anything less than 35 ms may be likely to cause problems since the solenoid potentially may not yet have had an opportunity to bring boost down? Is that correct?
My overboost "delay" is set to 5 ms, which I think is too short. I think it would be better to increase this to say 40 ms and bring the psi value down a little bit (rather than inflating the psi value to compensate). Thoughts?
My overboost "delay" is set to 5 ms, which I think is too short. I think it would be better to increase this to say 40 ms and bring the psi value down a little bit (rather than inflating the psi value to compensate). Thoughts?
09-08-2008, 08:49 AM
#444
Gotcha - thanks Hal. If I datalog at the high sampling rate (5 ms), I can see that boost fluctuates (oscillates) around the set target value. The frequency that it oscillates is 30 Hz as dictated by the boost control solenoid. So that's where I got my thinking that 1/30 (in secs is equivalent to about 33 ms) is how I arrived at 35 ms as the absolute minimum for that delay field. Never mind if this doesn't make sense lol. Thanks for the recommended values...
Originally Posted by Hal@IP
'Over boost delay' refers to how long you must be above the 'boost cut threshold' before it implements a fuel cut. This is helpful when you have mild spikes etc in a map sensor, as to not trigger the over boost cut.
'Boost restore pressure' refers to the manifold pressure the ecu must see before restoring fuel.
I typically run a 100-300ms over boost delay, so a tiny spike won't trigger the over boost cut. I set the boost restore pressure low enough that the car hits a "brick wall" to let the driver know something is wrong (waste gate line came loose, etc). If over boost is 150kpa, my boost restore would be 50-100kpa.
'Boost restore pressure' refers to the manifold pressure the ecu must see before restoring fuel.
I typically run a 100-300ms over boost delay, so a tiny spike won't trigger the over boost cut. I set the boost restore pressure low enough that the car hits a "brick wall" to let the driver know something is wrong (waste gate line came loose, etc). If over boost is 150kpa, my boost restore would be 50-100kpa.
09-16-2008, 05:38 PM
#447
Originally Posted by Hal@IP
Always 
But unlike some others, we try not to hype stuff before we have it working... things always seem to take way longer than expected.
But unlike some others, we try not to hype stuff before we have it working... things always seem to take way longer than expected.Last edited by SnyperZ; 09-16-2008 at 05:43 PM.
09-17-2008, 07:22 PM
#449
Thanks for all the hard work getting the few problematic G35's squared away with the CAN wheel data. Really, really appreciated! I've got wheel slip vs speed dependent boost control set up and working - just need to fine tune. 
I feel much better about punching the throttle, knowing that it will let off when it slips too badly rather than continuing to boost...
Really, really appreciated! I've got wheel slip vs speed dependent boost control set up and working - just need to fine tune. I feel much better about punching the throttle, knowing that it will let off when it slips too badly rather than continuing to boost...
Last edited by rcdash; 09-18-2008 at 04:21 PM.
09-18-2008, 12:25 PM
#450
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Originally Posted by rcdash
Thanks for all the hard work getting the few problematic G35's squared away with the CAN wheel data. Really, really appreciated! I've got wheel slip vs speed dependent boost control set up and working - just need to fine tune.
Really, really appreciated! I've got wheel slip vs speed dependent boost control set up and working - just need to fine tune. It looks like the same version 1.0.1 firmware on the web site. Are you testing something new/different?
09-18-2008, 04:30 PM
#454
Originally Posted by SnyperZ
Software upgrade?
I don't think this will impact most cars at all. I did hear the data logger got updated with a few minor fixes... it's on the usual download site. I haven't tried that yet - still playing with the new CAN data (wheel slip, yaw, G sensor) - pretty cool.
10-06-2008, 09:47 AM
#458
SnyperZ, you'll find that Hal only releases information publically once fixes and upgrades are out, working, and tested. No speculation, hype or fanfare - ever... Sorry bud - although if you call Hal and start chatting, he sometimes gives a few hints away...
Last edited by rcdash; 10-06-2008 at 10:51 AM.
10-06-2008, 09:59 PM
#460
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Pui...
just made it through the 23 pages of data 
Happy owner of an Haltech
Cant wait to get the car back from the tuner 
Tried to find a pdf manual on the haltech website but don't seem to be able to find it, anyone have it in pdf format?
Quick Q: could I map this for say running E85 then save that map and have a normal petrol map (Maxol E5) and swap between them without damaging the engine?
Happy owner of an Haltech
Cant wait to get the car back from the tuner Tried to find a pdf manual on the haltech website but don't seem to be able to find it, anyone have it in pdf format?Quick Q: could I map this for say running E85 then save that map and have a normal petrol map (Maxol E5) and swap between them without damaging the engine?
Last edited by aln; 10-06-2008 at 10:00 PM. Reason: added note...