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Unread 11-15-2012, 10:21 PM   #1
dandd
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1982 CJ8 
 
Join Date: Oct 2012
Location: San Jose, California
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drb2 fution to reduce Mopar mpi timing

I will be getting the use of a DRB2 scan tool next week. The purpose is to reduce the timing in a Mopar MPI conversion. "pinging"
I would like to know if anyone can give me a basic explaintion on how to do this and what other conponents are required (super card, flash card, jeep card, ...)

Thanks

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Unread 11-16-2012, 03:36 AM   #2
86cj74.2L
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Quote:
Originally Posted by dandd
I will be getting the use of a DRB2 scan tool next week. The purpose is to reduce the timing in a Mopar MPI conversion. "pinging"
I would like to know if anyone can give me a basic explaintion on how to do this and what other conponents are required (super card, flash card, jeep card, ...)

Thanks
I wasn't aware that you could do any tuning with the drb with the exception of target idle rpm.....possibly. If you can tweek timing tables that would be nice to know.
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Unread 11-16-2012, 03:53 AM   #3
gmakra
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Tell me more about the conversion is it a Hesco/Mopar kit? Did you bump the compression, change cams that kind of stuff?
You may need to get a MAP adjuster cause if your running the 4.0 dizzy its not really adjustable.
This may help you in the meantime http://www.splitsec.com/products/psc1/PSC1003.htm
The 4.0 MAP is not easily hacked to make adjustments. However there is a guy on Jeepstrokers that seem to be able to massage the ECM.
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Unread 11-16-2012, 10:02 AM   #4
dandd
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My understanding and post from Hesco (Mopar MPI support) the max timing is adjustable in 2 degree increments for a total of + or - 6 degrees.I was told this can happen with a DRB2 not a DRB3. I’m not sure of the program card to use.
The engine is a stock rebuild from titan motors in Florida so the compression is stock plus their machining. Stock cam, exhaust manifold, 195 therm, Hesco suggested cooler plugs.
What is 4.0 Dizzy?
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Unread 11-16-2012, 01:09 PM   #5
gmakra
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Dizzy is distributer
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Unread 11-24-2012, 08:53 PM   #6
dandd
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how to adjust with DRB

If you have a Moper MPI Kit (Hesco) this is how to retard timing with a DRB2 scan tool.

1. Plug SCI cable into DRB2, power and into computer interface plug.
2. Plug in super cartridge.
3. menu 1 press 4 select systems
4. menu 2 press 1 engine
5. menu 3 press 2 without A/C
6. menu 4 press 1 Fuel/Ignition
7. menu 5 press 5 Adjustments
8. menu 6 press 5 Spark Advance
9. menu 7 Spark Advance Adjustment
At this point you have the option to adjust the advance a total of -6 degrees in two degree increments.

After taking out -4 degrees the engine idles smoother and no issues with pinging, at last.
drb_sci_plug.jpg   drb_super.jpg   drb_menu1.jpg   drb_menu2.jpg   drb_menu3.jpg  

drb_menu4.jpg   drb_menu5.jpg   drb_menu6.jpg   drb_menu8.jpg  
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