Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

2 Bar Stock PCM Speed Density Tune for >6psi (Forced Induction)

Old Sep 24, 2008 | 03:05 PM
  #196  
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ill send you a few I had played with when I get home from work
Old Sep 24, 2008 | 04:51 PM
  #197  
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Let me see if I can find it.
Found it..
http://www.taekwondoplus.org/z28/Tur...OpenLoopSD.lt1

Last edited by DirtyDaveW; Sep 24, 2008 at 04:55 PM.
Old Sep 24, 2008 | 08:44 PM
  #198  
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Thanks, ill try that out tomorrow
Gary
Old Sep 25, 2008 | 04:03 PM
  #199  
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Originally Posted by DirtyDaveW
Let me see if I can find it.
Found it..
http://www.taekwondoplus.org/z28/Tur...OpenLoopSD.lt1
Are you running a 2 bar SD tune now? I thought you had a BH mail order tune? The last time I talked to BH he was still doing MAF tunes up to about 600 RWHP.
Old Sep 25, 2008 | 08:58 PM
  #200  
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I am still (Happily) running BH Maf tune. I was investigating running the SD tune because my NB O2 sensors are not happy in their current configurations. The passenger side is fine but because of design restrictions, the drivers side is in the downpipe and as such is essentially measuring not only the drivers side but the passenger side again. As a result, my wide band was all over the place at cruise. With the NB O2 sensors disengaged, it's much smoother now. Essentially, it's an Open Loop all the time MAF tune now. The plugs reading is a bit puzzling now though. All four drivers side plugs look perfect while all four of the passenger side plugs look a little cruddy. The engine isn't smoking, nor losing coolant and runs great.
Old Sep 25, 2008 | 09:08 PM
  #201  
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My car is running pretty good. Just got it back up and runninmg with the new motor so Im still tweaking.

Ive also adapted this to E85!


On the lean side here though, i was pretty low on gas, I think it might have been sloshing around a bit.

Last edited by jchevy; Sep 25, 2008 at 09:11 PM.
Old Sep 25, 2008 | 09:18 PM
  #202  
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Originally Posted by jchevy
My car is running pretty good. Just got it back up and runninmg with the new motor so Im still tweaking

Ive also adapted this to E85!
.
What a cool pod setup! <jealous>
I like that boost controller in the 3rd pod(or is that considered the 1st pod?)
Very cool picture.
Old Sep 25, 2008 | 09:24 PM
  #203  
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Originally Posted by DirtyDaveW
What a cool pod setup! <jealous>
I like that boost controller in the 3rd pod(or is that considered the 1st pod?)
Very cool picture.
Thanks... Im anxious and nervous to give it another 5 PSI. I still have some more tunnign to do where its at.

BTW You gave me Brett Baurers contact info a while ago...I got a hold of him and he did a cam for me

Last edited by jchevy; Sep 25, 2008 at 09:27 PM.
Old Sep 25, 2008 | 09:36 PM
  #204  
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Sweet
I'm real happy with my setup. The best of both worlds. The civility of a stocker and the lethal bite of a Rottweiler Lol...
Keep us posted on your findings as you bump up the boost! I'm heading home to Upstate New York for a month, then I'll be back to Houston to start bumping mine up as well.


Originally Posted by jchevy
Thanks... Im anxious and nervous to give it another 5 PSI. I still have some more tunnign to do where its at.

BTW You gave me Brett Baurers contact info a while ago...I got a hold of him and he did a cam for me
Old Sep 26, 2008 | 01:20 PM
  #205  
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so i got this going last night with your VE map, and it was pretty accurate. I have my injector constant at 18.5lb/hr, and i think i need to go to an even 18. im still around 135blm at the moment. pretty impressed as the cruise and tip in is alot smoother as i expected. I think with this huge blower im still getting some pressure pulses over the MAF and it was washing it out some.
Gary
Old Sep 26, 2008 | 08:45 PM
  #206  
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Im trying to mess around with warm startup settings now, seems like they got a little messed up after all the injector scaling.. best I can describe it is when the motor is near normal operating temp when I go to start it (minutes after shutting off) I have to crank longer than normal.. if I tap the gas it fires right up and everything is normal after that. There are settings in Tunercat just have to figure out what ones to adjust.

When motor is anywher near cool I crank it and it starts up very very strong and fast (1/10th of a second), once warm most of the time it takes 3-5seconds of continuous cranking to start.. even then it starts weakly then is normal. If I tap the gas while cranking it starts right up.. I think it's lean becuase there is no initial fire up like there should be if it's too rich.

Anybody have any ideas as to what setting this is? Theres things like Crank AFR, Inital Crank Pulse, etc.. if anybody adjusted anything and saw an improvement let me know!
Old Oct 8, 2008 | 02:42 PM
  #207  
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Is everyone doing these on OBD I computers? My builder/tuner is saying that he is having a hard time getting everything completely finalized with the tune on my OBD II cars ans is saying I'll need to go the OBD I route. That's not something I really want to do. My car is bad enough as it is in relation to California law.
Old Oct 8, 2008 | 08:32 PM
  #208  
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What is the Injector Min PW set to stock. I have LT1 edit and cant see it, but I have the lean spot right at 27 KPa. I am also rich when I am coasting in neutral.

My datalogs dont show my BPW mS any less than 2.0. Does this mean my problem is elsewhere?

Can I email a file to someone and have them change the min pulsewidth for me?
Old Oct 8, 2008 | 10:53 PM
  #209  
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Originally Posted by snorkelface
Is everyone doing these on OBD I computers? My builder/tuner is saying that he is having a hard time getting everything completely finalized with the tune on my OBD II cars ans is saying I'll need to go the OBD I route. That's not something I really want to do. My car is bad enough as it is in relation to California law.
I am on OBDI only because it was cheaper (I have 1996 car). Ask him what he's having problems with and be very specific.. I thought most of all of the tables are the same but the software is different... wondering if he has software that does not include the BARO Update settings then yes he will have problems for sure.
Old Oct 8, 2008 | 10:55 PM
  #210  
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Originally Posted by jchevy
What is the Injector Min PW set to stock. I have LT1 edit and cant see it, but I have the lean spot right at 27 KPa. I am also rich when I am coasting in neutral.

My datalogs dont show my BPW mS any less than 2.0. Does this mean my problem is elsewhere?

Can I email a file to someone and have them change the min pulsewidth for me?
I think mine were ~1.4ms.. you have to use TUnercat to see the settings. If you have big injectors 1.4ms is way too high but dont set it lower than ~1.0 or they stay closed completely without showing it.

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