dp-tuner tunes for a manual tranny...
#1
dp-tuner tunes for a manual tranny...
I'm fixing on finally getting the dp-tuner chip in the next week. My buddy just sent his PCM in to Jody to get the 80hp-eco tune burned on there, and so far the results are pretty awesome. He's got a 99 f-350, auto-tranny, and is getting slightly better mileage, much more power at higher RPM/throttle position, and the shift points are MUCH improved. I read somewhere that the 100hp tune is the better tune for a manual tranny, vice the 120 or 140 hp tunes..anyone else heard this? Anyone with a straight drive got any experience with the dp-tuner tunes? I'm thinking on getting the 80-eco and the 140, unless it isn't wise to do so for some reason...
I plan on getting the pyro and boost gauges, and was also looking into air-to-fuel gauges. Anyone else use wide band a/f gauge?
Thanks
I plan on getting the pyro and boost gauges, and was also looking into air-to-fuel gauges. Anyone else use wide band a/f gauge?
Thanks
#5
I put the inter cooler on after I got the chip. I did it recently just before I put the H2e on. Installing the cooler was pretty easy just figuring the tubes would be the hardes part. I hooked it up when I got the H2e because it came with tubes.
As far as an investment, not sure. It will keep egt's cooler and I tow so that was important to me.
As far as an investment, not sure. It will keep egt's cooler and I tow so that was important to me.
#6
#7
Did a little more thinking on the intercooler...
Exhaust heat on expansion side of turbo (the turbine) conducts to the compression side of the turbo (intake compressor), and heats the intake air, say, to 250 degF. A good intercooler can apparently reduce the intake temp back down to within 20 degF of the ambient air temp, (Intercoolers) while sacrificing 3-4 psi of boost across the intercooler. Ideal Gas Law says: air density = (pressure) / (gas constant * temperature). So, on a 80 degF day, the intercooler reduces the intake air to 100 degF (80 + 20), and reduces boost from 23 psi to 20 psi. Plug all that in and you get a net 27% increase in air density, accounting for the reduction in density due to pressure loss, and the increase in density due to temp decrease.
Higher density and a lower air temp means two things the way I see it: more of the injected fuel is combustible because more air mass is moving through the intake (ie, more torque, due to higher peak cylinder pressure, due to higher Q_in), but also a lower total temperature (work done on air/fuel mixture by the piston starts at a lower temp, which should reduce the high temp after combustion, reducing EGT). The combination of the two implications seems to be that the engine would produce a higher torque at slightly lower exhaust temperatures.
The intercooler is definitely looking more attractive....
Exhaust heat on expansion side of turbo (the turbine) conducts to the compression side of the turbo (intake compressor), and heats the intake air, say, to 250 degF. A good intercooler can apparently reduce the intake temp back down to within 20 degF of the ambient air temp, (Intercoolers) while sacrificing 3-4 psi of boost across the intercooler. Ideal Gas Law says: air density = (pressure) / (gas constant * temperature). So, on a 80 degF day, the intercooler reduces the intake air to 100 degF (80 + 20), and reduces boost from 23 psi to 20 psi. Plug all that in and you get a net 27% increase in air density, accounting for the reduction in density due to pressure loss, and the increase in density due to temp decrease.
Higher density and a lower air temp means two things the way I see it: more of the injected fuel is combustible because more air mass is moving through the intake (ie, more torque, due to higher peak cylinder pressure, due to higher Q_in), but also a lower total temperature (work done on air/fuel mixture by the piston starts at a lower temp, which should reduce the high temp after combustion, reducing EGT). The combination of the two implications seems to be that the engine would produce a higher torque at slightly lower exhaust temperatures.
The intercooler is definitely looking more attractive....
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#8
wow, you pretty much lost me through the mathematicals, but i do know that an intercooler is more noticeable when you have more fuel. do that same math only drop your psi to around 14-15, that's all mine got stock so after the intercooler your looking at maybe 11-12 psi of air going into the engine. so your gain will be much less as well. now you get more fuel which gets you more boost(say you put in a chip and now u get around 23psi) now your going to get the increase that you just calculated b/c you are making more boost to start with and your not going to have as much turbo lag either with more fuel. i would go with the chip then the intercooler personally..
#9
Eric- Great math, but it should be noted that:
Ideal gas laws dont Work perfectly in a flowing system, although a very good approximation.
the heat on the compressor side of the turbo is from heat transfer as well as thermal rejection from compression. (compressing air raises temperature)
the intake side of the turbo can put out 400+ degrees F.
lemme see if i can post the videos that Farm sent me...
Ideal gas laws dont Work perfectly in a flowing system, although a very good approximation.
the heat on the compressor side of the turbo is from heat transfer as well as thermal rejection from compression. (compressing air raises temperature)
the intake side of the turbo can put out 400+ degrees F.
lemme see if i can post the videos that Farm sent me...
#10
Ok, i had to do this....
Brandon, i really hope you dont mind, but i put those vids up on youtube.
http://www.youtube.com/watch?v=ImwhrV9cLcE
http://www.youtube.com/watch?v=nf7ladNL7V8
Brandon, i really hope you dont mind, but i put those vids up on youtube.
http://www.youtube.com/watch?v=ImwhrV9cLcE
http://www.youtube.com/watch?v=nf7ladNL7V8
#11
Ok, i had to do this....
Brandon, i really hope you dont mind, but i put those vids up on youtube.
YouTube - Intercooler temperature differences 2
YouTube - Intercooler Temperature differences
Brandon, i really hope you dont mind, but i put those vids up on youtube.
YouTube - Intercooler temperature differences 2
YouTube - Intercooler Temperature differences
#13
#14
Dang, that's impressive. I think it'd be pretty cool to get a decent wide-band air to fuel gauge so the mileage "sweet spots" can be found, ie. the speed, gear, and rpm that results in the best fuel economy....but I'm having a hard time finding one for a diesel engine. There's tons of em for gas
#15
Join Date: Apr 2004
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Dang, that's impressive. I think it'd be pretty cool to get a decent wide-band air to fuel gauge so the mileage "sweet spots" can be found, ie. the speed, gear, and rpm that results in the best fuel economy....but I'm having a hard time finding one for a diesel engine. There's tons of em for gas