TST Box Tips.

[BillGotthelf]

Couple of things the instructions don't tell you. There are two ground wires one from the harness that goes to the MAP sensor/ injectors and the other one that goes to the cam and crankshaft position sensor. DON'T use the ground wire on the cam/crankshaft wiring harness. It will cause the check engine light to come on ( codes PO341) and is not needed.

One interesting fact that is not in the instructions for you guys that buy the full gauge (egt) version when you cycle thru the screens the 4th one (before you get back to the power level, egt screen) shows the current temp of the computer box. It says bt and the hottest I could get mine was 105 today.

The best mounting location I could find that I could see real easy was on the steering column right in front of the speedo/tach centered. It did not block the other instruments and when I scanned the instruments its right there.

I also used diffferent power sources than the instructions said because I did not want to "share" fuses. There are plenty of extra places in the fuses panel to get power from. Check the right side plugin slots in the unused relays. Just plug in a fuse and use these.

 

[mgonske]

Two Pyros on One Sensor?

My box shipped Monday; while I'm waiting for it, I'm wondering if there will be any problem hooking the PMCR box up in parallel with my Di-Pricol EGT gauge to its Type K thermocouple? If they just measure voltage across the thermocouple, they'd both see the same voltage in parallel, right?



What about boost? I imagine I'll need to drill & tap another pressure port in the intake manifold, won't I?

 

[Tomeygun]

1) boost is already done... via map sensor



2) i was told that both guages would off a little, like 50 degrees if both are off the same K coupler... i think i will run both, pre and post... or sell the old egt



2) and the BT measurement was in error, the production boxes are not to have that, but mark said that it does not hurt anything... . (same with extra ground)



3) - mark said that the power is pretty close to proportional, like setting 4 and 5 is about half as much as setting 9.

and that a good rule is 20hp and 60Torq PER number difference- give or take or 1 and 9



4) 7 and above is useless unless you have a pusher pump, mark is working on a less expensive fix then a full boat system.



5) I LOVE THIS BOX!!! setting 5/5 was great, i will try 6/6 tonight, the torq setting was nice to have, but the smoke is no where to be seen ?!

 

[mgonske]

Originally posted by tomeygun

1) boost is already done... via map sensor

Thanks, tomeygun.



I may be getting over my head already. If the box functions as a boost fooler, does the 'fooled' boost value then go back out to the [ECM or PCM?] after reading the raw value for display? What if the box is stacked with the EZ--is a valid boost value obtainable?



Actually, from all the posts so far, it sounds like the best option is installing the TST box without the EZ, since it already offers more power than is usable (never mind the rail pressure issue).

 

[Tomeygun]

well, if you do stack the EZ - when you want to get crazy,



you would not even hook up the map sensor- just leave it



thats my guess

 

[Floor It]

If you are going to stack the EZ you have to piggy back the map sensor connections! It's already been done and there is power to be gained on the lower settings but when the TST box is on the higher settings, nothing was gain at all! The pulse and duration were asking so much from the CP3 that there was nothing left for the pressure box to deliver as an extra for more power.



John

 

[DragRacer]

Does this TST box without gauges still have the ability to limit power based upon EGT? If so how is that feature enabled/adjusted?



Thanks,



Jason G.

 

[thejeepdude]

Originally posted by BillGotthelf

The best mounting location I could find that I could see real easy was on the steering column right in front of the speedo/tach centered. It did not block the other instruments and when I scanned the instruments its right there.

Got a pic?

 

[Agades]

cooooool



finally

some good info



keep it commin guysOo. Oo. Oo. Oo.

 

[Mopar_Mudder]

Originally posted by tomeygun

4) 7 and above is useless unless you have a pusher pump, mark is working on a less expensive fix then a full boat system.

But wait, on their site is says it will work on a "stock" truck, LOL, just had to bring that up... ...

 

[DLeno]

Re: Two Pyros on One Sensor?

Originally posted by mgonske

My box shipped Monday; while I'm waiting for it, I'm wondering if there will be any problem hooking the PMCR box up in parallel with my Di-Pricol EGT gauge to its Type K thermocouple? If they just measure voltage across the thermocouple, they'd both see the same voltage in parallel, right?

Two points about measurement error in type K thermocouples:



1. They work on the principle of voltage difference. Two dissimilar metal junctions are employed and the voltage output is proportional to the temperature difference between them. One junction is in the exhaust manifold; the other is several feet away where pure copper hookup wire begins. Measurement error can occur if the guage is calibrated with the expectation that the "2nd" junction is at room temperature and you install it under the hood where it is hot. The "2nd" junction should most likely be installed in the cab where temperature is more controlled. Check your mfg to see what "2nd junction temp" the default calibration is based on. If your "2nd junction" is under the hood, you gauge could read 50 or more degrees too low.



2. They are high impedance devices. This means that only one measurement gauge should be connected, because the guages themselves are calibrated with the expectation of only one gauge. Again, the error is on the wrong side -- voltage output will be low and the guage will read too low.

 

[DLeno]

Originally posted by mgonske

Thanks, tomeygun.



If the box functions as a boost fooler, does the 'fooled' boost value then go back out to the [ECM or PCM?] after reading the raw value for display? What if the box is stacked with the EZ--is a valid boost value obtainable?



Actually, from all the posts so far, it sounds like the best option is installing the TST box without the EZ, since it already offers more power than is usable (never mind the rail pressure issue).

The Manifold Absolute Pressure (MAP) sensor is a pressure-to-voltage transducer, providing 1 volt per atmosphere of output (I think that is correct for our trucks but I haven't personally validated this). Boost fooling occurs by impersonating the MAP sensor and sending, say, 1. 5 volts to the ECM. 1. 5 volts would correspond to approximately 7 lbs of boost.



A fueling box can still read the actuall MAP output voltage and then send a constant 1. 5 volts to the ECM. So the ECM thinks boost is 7 lbs when it might be 35. on board diagnostics will reflect the fooled bost value.



If you stack two boxes each capable of boost fooling, connect only one of them to the MAP sensor. Otherwise they will fight each other and may even break the ECM -- each might be trying to assert a different voltage back to the ECM.

 

[BillGotthelf]

DragRacer-No without the upgraded version the box cannot tell the egts so there is no way to limit it. Installation is very simple. Took me 50 minutes but I used different power (one switched and one constant hot) sources as I don't like "sharing" fuses. If one fuses blows you sit on the side of the road dead until you can diagnose problem.

 

[FastEnough]

Stacking w/EZ

Does anyone know for sure if you do piggy back the MAP sensor or would that cause problems? Has anyone asked Mark at TST about this already? And are there any other harnesses that they both use or is the MAP the only issue?

 

[mgonske]

Re: Re: Two Pyros on One Sensor?

Originally posted by DLeno

Two points about measurement error in type K thermocouples:

<snip>

2. They are high impedance devices. This means that only one measurement gauge should be connected, because the guages themselves are calibrated with the expectation of only one gauge. Again, the error is on the wrong side -- voltage output will be low and the guage will read too low.

Thanks, DLeno, that's the kind of info I was looking for (even if not exactly the answer I was hoping for ).



Maybe I'll try to get a good baseline with the box installed and just one gauge for a while, and then hook up the second and see if I can do a mental correction factor--I really hate to give up the analog gauge, but definitely want the defueling-based-on-EGT option.

 

[Tomeygun]

Originally posted by Mopar_Mudder

But wait, on their site is says it will work on a "stock" truck, LOL, just had to bring that up... ...

you got me. . i meant to say useless for sustained power...

ps. i threw code p2149 last night...



???

 

[AKAMAC]

Originally posted by tomeygun

you got me. . i meant to say useless for sustained power...

ps. i threw code p2149 last night...



???

Fuel Injector Group 2 Supply Voltage Circuit

 

[StephenThomas]

Seems like quite a few codes are getting thrown with the install of the TST module. Keep us posted please.

 

[Tomeygun]

Originally posted by StephenThomas

Seems like quite a few codes are getting thrown with the install of the TST module. Keep us posted please.

i thought that too, but with all good things there are trade-offs...



so far the errors have been: (that i know of)



1 - on the wire harness, like the 2nd bank injector wired backwards, ( only one that i know of, and not mine,btw)



2 - camshaft code because of extra ground - easy fix



3 - latest P2149 code, TST tech on phone said the fuses should be 5 amp in the box, not 3 amp like mine (very early one).



easy fix, just put 6 new 5amp fuses in, i will update tonight if this fixes the code



other than that, I was aware when i bought this box that there would/is bugs to work out. thats why it took so long, and EDGE is still at the drawing board



i am still very happy with the extra HP

 

[robertyoke]

well I got codes p606 & p336. also I got some stumble, miss if I floor it from idle. Ill call mark on Monday to figure it out... but man does this thing fly .