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Old 01-07-2004, 12:26 AM   #21
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Quote:
Originally posted by JadXtreme
Where would the DRAC module be located on my 93 TBI 4.3 auto?

Is this DRAC module supposed to work on my 93? Cause I read the thing only went up to 92, but i'm not sure? Please someone help me, I hit my governor way early since i got smaller tires.


at what MPH as far as i know you dont have a governor
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Old 01-07-2004, 12:56 AM   #22
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Yeah. I have a governor. It kicks in around 100 mph or so. I can't really tell though because my speedo stops at 85. I can hit it at WOT or by slowely applying the gas and keeping it in overdrive. Either way. I hit it, and the truck surges down, and cuts back on, and I can hit it easily. Even multiple times in a row. Its like a fuel shut off governor.

Where is the DRAC module though so I can recalibrate it for my tire size I have now? I have already figured out what I should change the pins to on the module. I just need to know where it is and about how long it might take to get it out and do the mod to it.
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Old 01-07-2004, 02:50 PM   #23
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the white box bolted to your ECU
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1991 s10
6 holes doin more than most can do with 8.....
Only thing stock about it is the valves
N/A 14.8@95mph, 2.3 60', 5,000rpm shifts
with boost 12.63@104.7mph, 1.76 60', 5,400rpm shifts VIDEO

POLY MOTOR MOUNT SALE, CLICK HERE!
ONLY 2 PAIR LEFT, THEN THEY ARE GONE FOR GOOD
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Old 01-07-2004, 03:39 PM   #24
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BTW, your 93 should be considered a VSS not a DRAC.

It feeds the speedometer, ABS and computer. It's input is from the tranny.

An actual DRAC, gets its input from a sensor in the axle.

I found my original unit. I will take a pic of it showing the pins that are jumpered and post later. I plan on doing the calculations and see how things match up.
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Old 01-07-2004, 04:09 PM   #25
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Here is a pic of my VSS.

The original cal specs are P215-65R-15 tires 81.68 circumference, with 3.42 gears.

The calculator page said I needed a 46 value with pins 7, 5 and 1 connected.

As you can see I have 4 pins connected. Is this because this is a VSS and not an actual DRAC?



BTW, the unit I bought plugged right in but was laid out different.
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In progress as of now: Paint the interior metal, new carpet, Corbeau seats. I have all new gaskets for the doors and windows. Many new parts to install.

Last edited by 92SonomaST; 01-07-2004 at 04:19 PM.
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Old 01-07-2004, 04:29 PM   #26
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Just to clear up some terminology, VSS is Vehicle Speed Sensor. The sensor (VSS) itself is mounted in the transmission case (2wd) or transfer case (4wd). It's a PM (permanent magnet) generator that produces an A/C voltage.

DRAC is the Digital ratio adaptor circuit. (the box you showed)
It compensates for tire sizes and gear ratios.

DRACs are mounted to the side of the ECM/ECU/PCM/VCM or whatever you prefer to call it.
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Old 01-07-2004, 06:19 PM   #27
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Ok, one last question, where the hell is the ECM on my truck??

I'm plenty good on most of the parts of my truck, but I don't know nothing about the electrical stuff about my truck.
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Old 01-07-2004, 06:34 PM   #28
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Quote:
Originally posted by JadXtreme
Ok, one last question, where the hell is the ECM on my truck??

I'm plenty good on most of the parts of my truck, but I don't know nothing about the electrical stuff about my truck.
Should be under the passenger's side dash. There might be a hush panel you need to remove first. Then a 7mm headed screw to release the ECM and bracket.
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Old 01-07-2004, 08:10 PM   #29
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Thanks for the terminology clarification. The older chiltons I have is better than the haynes, but not much. I have the Holden's complete set of everything in route.


I have to remove the kick panel to make enough room to drop my ecm down without tearing up the wiring.

There is one 7mm screw going straight up into the bottom of the dash.

BECAREFUL, I have to pull real hard to get the ecm out of the detents.

the drac is a piggyback white box on the backside. You cannot get to it without pulling the ecm.
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In progress as of now: Paint the interior metal, new carpet, Corbeau seats. I have all new gaskets for the doors and windows. Many new parts to install.
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Old 01-07-2004, 08:15 PM   #30
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Quote:
Originally posted by 92SonomaST
Thanks for the terminology clarification. The older chiltons I have is better than the haynes, but not much. I have the Holden's complete set of everything in route.


I have to remove the kick panel to make enough room to drop my ecm down without tearing up the wiring.

There is one 7mm screw going straight up into the bottom of the dash.

BECAREFUL, I have to pull real hard to get the ecm out of the detents.

the drac is a piggyback white box on the backside. You cannot get to it without pulling the ecm.
Yeah it's really tight up in there. I found it's easier to unplug the ECM first before trying to get it out. (make sure the key is off. )
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