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6.4L Performance Parts Discussion What has or has not worked for you?

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Old 03-05-2012, 04:35 PM
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DashDaq Gauges

Been curious about some of these for a while, can someone help me out with interpreting what they do/mean?


The clear ones and fairly straight forward are:
eot, ect, frp, mgp, iat 1&2, egrta, tft, torque...

The few im not so sure what the numbers are telling me or how to interpret them are:
TCSLIP, this I understand is torque converter slip but what does the numbers tell me? In the pic it shows 764.50....
MAP, is this my exhaust back pressure?
MFDSD , no idea.
FUELPW, not sure, fuel pressure _____?
VGTDC, something top dead center?
INJ_TIM, injection timing?, not sure what number tells me
LOOP, egr valve?

Thanks!
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Old 03-05-2012, 04:41 PM
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I've been wondering the same thing


Sent from my Autoguide iPhone app
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Old 03-05-2012, 05:38 PM
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I know a few...

Tcslip- torque converter slip, ideally under 10 when converter is locked. Only watch when converter is locked.

Map- back pressure. Subtract roughly 15 and that's the ebp.

Hope that helps...
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Old 03-05-2012, 05:51 PM
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^ Thanks.
Ill be sure to check that slip when locked, doesnt happen much around town though (I run the late lock)
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Old 03-05-2012, 10:56 PM
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TCSLIP torque converter slip
MAP, manifold absolute pressure, this is intake pressure plus atmosphere, NOT EXHAUST
MFDSD , mass fuel desired
FUELPW, fuel pulse width, how long the injector is open
VGTDC, variable geometry turbo duty cycle, what percent the VGT vanes are open/closed.
INJ_TIM, injection timing, relative to crank rotation
EGR valve, tells you what percent the valve is open
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Old 03-06-2012, 08:27 AM
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Anything below 10 on TQSLIP is just error. You want it to stay below 100 at WOT. Anything above that and you'll probably be looking at replacing the converter in the near future. You probably won't see much above 10 most of the time. Only at hard throttle should it get above 10.
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Old 03-06-2012, 02:30 PM
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Quote:
Originally Posted by tensixniner View Post
TCSLIP torque converter slip
MAP, manifold absolute pressure, this is intake pressure plus atmosphere, NOT EXHAUST
MFDSD , mass fuel desired
FUELPW, fuel pulse width, how long the injector is open
VGTDC, variable geometry turbo duty cycle, what percent the VGT vanes are open/closed.
INJ_TIM, injection timing, relative to crank rotation
EGR valve, tells you what percent the valve is open
Thanks.

Quote:
Originally Posted by 08stroker250 View Post
Anything below 10 on TQSLIP is just error. You want it to stay below 100 at WOT. Anything above that and you'll probably be looking at replacing the converter in the near future. You probably won't see much above 10 most of the time. Only at hard throttle should it get above 10.
So, in the pic my tcslip says in the 700s....you can see the boost is pretty low as I wasbarely into it....is that tcslip abnormal?
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Old 03-06-2012, 06:46 PM
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Quote:
Originally Posted by Clayton1985 View Post
So, in the pic my tcslip says in the 700s....you can see the boost is pretty low as I wasbarely into it....is that tcslip abnormal?
It would be abnormal if your torque converter was locked. Your torque converter was not locked there though. If it was, you would know something was up with that kind of slip.
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Old 03-06-2012, 06:49 PM
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Quote:
Originally Posted by 08stroker250 View Post
It would be abnormal if your torque converter was locked. Your torque converter was not locked there though. If it was, you would know something was up with that kind of slip.
Oops, I forgot about not being locked.
Thanks!
Oh, so where the heck do I find the exhaust back pressure gauge??
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Old 03-06-2012, 06:58 PM
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It's listed as "EP."

Exhaust Back Pressure (absolute)

It reads back pressure + barometric pressure.
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