Recent Dyno Runs, TNT-R, BD Race Twins and Defueling, HELP
#1
Recent Dyno Runs, TNT-R, BD Race Twins and Defueling, HELP
My truck is an 2007. I did about 12 dyno runs between Friday and Monday and the truck is defueling at about 2750 RPMs. We are stuck as to why. At 2750 rpms we were at 600hp, so we were on track to make pretty big numbers. It almost looks and feels like the stock rev-limiter. Any help would be really appricated.
Jason at Diesel Nut Motorsports In Sacramento did the following Mods then we dyno'd it:
Industrial Injection Dual CP3's
Industrial Injection Stage 2 nozzels (90Hp)
BD R700 Twins
Studs
Springs
TNT-R
Quad X2 with a pressure tune and boost fooling
During the Run:
The TNT-R has the rev-limiter off for sure and SW9 or SW7
Boost 63lbs
Rail Pressure is 24,500 PSI
Jason at Diesel Nut Motorsports In Sacramento did the following Mods then we dyno'd it:
Industrial Injection Dual CP3's
Industrial Injection Stage 2 nozzels (90Hp)
BD R700 Twins
Studs
Springs
TNT-R
Quad X2 with a pressure tune and boost fooling
During the Run:
The TNT-R has the rev-limiter off for sure and SW9 or SW7
Boost 63lbs
Rail Pressure is 24,500 PSI
#2
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i ran into a guy yesterday at the track and the exact same thing was happening to him, but on the track. he had nathan's twins , inj,and the smarty tntR. his truck was defueling also. he's on DTR so maybe he will chime in
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My '07 de-fuels badly as well, but I made 722hp with Flux 2.5's on its first pass.
Something is wrong.
Try this
-Turn the Shift De-Fuel to OFF (#1)
That will fix the de-fueling
Also
-Turn the torque management off (#4)
-Crank up the timing to #2 or even #1 (if it doesn't rattle too bad).
-Turn the rail pressure to #3
-Make sure you wastegate is cranked down.
Dyno again and I bet you'll be over 700!
Good Luck!
Something is wrong.
Try this
-Turn the Shift De-Fuel to OFF (#1)
That will fix the de-fueling
Also
-Turn the torque management off (#4)
-Crank up the timing to #2 or even #1 (if it doesn't rattle too bad).
-Turn the rail pressure to #3
-Make sure you wastegate is cranked down.
Dyno again and I bet you'll be over 700!
Good Luck!
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I was/am having the same problem, I was on Floor-it's dyno when it first occured so I went to another dyno in town to verify and it was still occuring. FP staying around 20 on full runs. My speedo has been adjusted for tire size also. Been on John's dyno several times and this just started happening. Happens with or without smarty also.
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#8
I was/am having the same problem, I was on Floor-it's dyno when it first occured so I went to another dyno in town to verify and it was still occuring. FP staying around 20 on full runs. My speedo has been adjusted for tire size also. Been on John's dyno several times and this just started happening. Happens with or without smarty also.
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yep. I'm going to Scheid's show this weekend not sure if I'm driving yet or riding but if I drive I'll be on one of the dyno's up there. John at Floor-it says he's got a few other trucks doing the same thing but last I talked to him they hadn't figured it out, that was 6 months ago. Maybe a phone call is in order.
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The graph shows that it is acting like the stock limiter. It actually carries peak hp until 3,300 or so. It isn't defueling at 2,750, it is defueling at 3,300.
#15
The graphs I have seen with mods similar to mine continue to climb a lot higher than 2750 as the peak, up to even 1000 rpms more. I would say it is starting to limit fuel or defueling at 2750 and agree it is acting like a stock rev-limiter.