New OBD0 boost code
11-29-2003, 01:05 PM
#11
3.0 BAR
Join Date: Feb 2003
Posts: 9,089
Re:New OBD0 boost code
to help my understanding...
how does this rom work? it switches between maps based on IM pressure/vac right? how does the ecu do that? I mean im not asking how you wrote this but understanding it is key to tuning it right?
how does this rom work? it switches between maps based on IM pressure/vac right? how does the ecu do that? I mean im not asking how you wrote this but understanding it is key to tuning it right?
11-29-2003, 03:02 PM
#12
3.0 BAR
Join Date: Apr 2003
Posts: 2,260
Re:New OBD0 boost code
Well, blundar has released a well commented DASM of the ROM (thank you Dave!!!) for us to understand.
Long story short, he basically calculates the highest point at which the MAP sensor routine can operate without throwing a code. If it's too high he sets a bit (to nidicate boost), if not, he lets thr routine continue as normal. If the bit is set, he replaces the MAP sensor value with something useable, and points it to the boost table, and then continues on with operation from the second table (boost tables).
Very cunning! ..Thanks Dave (and everyone at PGMFI) for all of your work, and sharing this information with us laymen! Three cheers!
Long story short, he basically calculates the highest point at which the MAP sensor routine can operate without throwing a code. If it's too high he sets a bit (to nidicate boost), if not, he lets thr routine continue as normal. If the bit is set, he replaces the MAP sensor value with something useable, and points it to the boost table, and then continues on with operation from the second table (boost tables).
Very cunning! ..Thanks Dave (and everyone at PGMFI) for all of your work, and sharing this information with us laymen! Three cheers!
11-30-2003, 03:46 PM
#14
1.0 BAR
Thread Starter
Join Date: Apr 2003
Posts: 288
Re:New OBD0 boost code
Sean, I'm going to change the way it works sooner or later. I like the GM multiplier table idea better where the last row of the VE table is scaled (unevenly) according to boost...
To make the boost portion of that ROM, I literally copied the last NA column, and then increased each column in the table by 4%... Trying to make an educated guess as to a good baseline tune.
If that's what I'm doing for tunes, why not just implement the code as a multiplier? That's my thoughts at least...
Spent last night integrating l3st4rd's new serial interrupt handler so the possibility of realtime programmability will be even closer.
OBD0 is hot again baby. Yeah baby, yeah!
p.s. I posted another version of the code "try6.asm / try6.bin" that have a lot more comments towards the top about how things work instead of just in the appropriate piece of code. If you're curious, read it. Car should behave just like stock (and run off stock table) till boost, at which point you have a second table the same size as stock for the boost region. Total overkill, but...
To make the boost portion of that ROM, I literally copied the last NA column, and then increased each column in the table by 4%... Trying to make an educated guess as to a good baseline tune.
If that's what I'm doing for tunes, why not just implement the code as a multiplier? That's my thoughts at least...
Spent last night integrating l3st4rd's new serial interrupt handler so the possibility of realtime programmability will be even closer.
OBD0 is hot again baby. Yeah baby, yeah!
p.s. I posted another version of the code "try6.asm / try6.bin" that have a lot more comments towards the top about how things work instead of just in the appropriate piece of code. If you're curious, read it. Car should behave just like stock (and run off stock table) till boost, at which point you have a second table the same size as stock for the boost region. Total overkill, but...
11-30-2003, 06:18 PM
#15
1.0 BAR
Join Date: May 2003
Posts: 517
Re:New OBD0 boost code
OMG Blundar you are makingme want to put the turbo back on 
WHY are you doing this to me..... I LOST YOUR ADDRESS i cant send you anything..... PM it to me again please.
Also I wondered how is this bin going to run on DOHC motors I remeber a slight issue IN THE PAST on pm6 codes on DOHC motors like the ZC. ?
WHY are you doing this to me..... I LOST YOUR ADDRESS i cant send you anything..... PM it to me again please.Also I wondered how is this bin going to run on DOHC motors I remeber a slight issue IN THE PAST on pm6 codes on DOHC motors like the ZC. ?
11-30-2003, 06:58 PM
#16
1.0 BAR
Join Date: Oct 2003
Posts: 232
Re:New OBD0 boost code
no dave what youve got is pretty good right now. every once in a while becuase i like to tweak my Ve tables just so to vary the AFR depending on speed and load it create a small headach for the multiplier. so i have had to resort to setting my 100kpa clolumn for stioch instead of the 13.8-14.7 id preferably use. i like to keep the cobustion temps a bit cooler helps ward of knock going into boost. but with the WOT afr modifier i can accamodte this fariyl easily. ill bring the car down some time after christams and we will play with my tunning tools so i can show you what i mean.
12-06-2003, 08:19 PM
#17
3.0 BAR
Join Date: Jul 2003
Posts: 6,449
Re:New OBD0 boost code
I put try11.bin in my 91 LS teg with a PM6. Idles at like 600 cold terribly. Warmed up on another chip and then tried it again...stalled it out.
Im not advanced enough to open a bin w/o TurboEdit so i cant play with anything.
Anyone else experience anyh idling problems?
Im not advanced enough to open a bin w/o TurboEdit so i cant play with anything.
Anyone else experience anyh idling problems?
12-08-2003, 12:45 AM
#19
3.0 BAR
Join Date: Apr 2003
Posts: 2,260
Re:New OBD0 boost code
Ya.. TE2.0 can edit the bin just fine. There are a couple of beta floating around so I have people trying to see if there are any bugs.
Try11.bin is flawed. The richness isn't because of the tune. Dave and I went through some beta testing of some code while he was coding the ROM and I was applying his massive amount of feaures to TE2.0.
Right now, we're up to try16.bin, and I don't know if it's posted anywhere at the moment. I'm personally running this bin in my car right now and it's running perfectly.
Hrm, I'll just post it here so you guys can play with it, and feel the improvement of the boost code.. Check it out!!
http://index.driftkids.com/TRY16.BIN <- There you go! Burn that. Rev limits are stock, and Launch Control is enabled at 4000.
NOTE: With this bin, all you need is 450cc injectors. Boost or NA, it doesn't matter. 450cc injectors and you're set! It's hot!
Try11.bin is flawed. The richness isn't because of the tune. Dave and I went through some beta testing of some code while he was coding the ROM and I was applying his massive amount of feaures to TE2.0.
Right now, we're up to try16.bin, and I don't know if it's posted anywhere at the moment. I'm personally running this bin in my car right now and it's running perfectly.
Hrm, I'll just post it here so you guys can play with it, and feel the improvement of the boost code.. Check it out!!
http://index.driftkids.com/TRY16.BIN <- There you go! Burn that. Rev limits are stock, and Launch Control is enabled at 4000.
NOTE: With this bin, all you need is 450cc injectors. Boost or NA, it doesn't matter. 450cc injectors and you're set! It's hot!
