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So i bypassed the fdc today and installed my pyro and boost gauge and let me tell you night and day difference. I can't believe how much better the truck runs. I didn't even bump the fuel up yet but I already think someone did or it is up from factory cause its still wired. The bypass was supper simple. I used plugs and ran a new line to the hydraulic head. I also completely removed the flame heater lines. I'm hoping this helps the truck start when it's cold. I'll find out tomorrow its supposed to be 20° in the am so I'll see what the difference is. Thanks for all the help guys.
Also what do you guys think on this.... do I have room to bump fuel up more? At 55 the truck is running around 5 psi boost and around 800° on the pyro. If I get on it hard pulling out the pyro will come up to around 1000°. I went and pulled a long hill near my house which is about two miles long. Before I had to drop it in 4th now I can pull it in 5th about 1/2 to 2/3rd throttle the pyro is right around 1000° to 1100°. If I go full throttle i can get it close to 1200°. Sounds like I do have have a little room I could always just back out of the pedal if it gets to hot. Also pulling that hill it's running around 12 psi at 1/2 to 2/3 Throttle and will easily hit 15 at full throttle
Just added my boost gauge and pyrometers to my M35A2.
In 4th up a long hill, 100% throttle, couldn't quite get to 2500 rpms, gauge showed 5 pounds of boost and almost 950 degrees. So if the hill had been longer, or if I would have had any load (I don't even have a bed on right now), it'll be higher obviously, but I want more boost and more power.
Im going to turn my fuel up tomorrow and retest/adjust all day. Then I'll probably end up by-passing the FDC.
Sold. I'm by-passing the FDC today.I agree with doghead. I got similar measurements (pre-turbo) you report before bypassing my FDC, yet did not need to turn up the fuel afterwards. There are other advantages to bypassing the FDC, such as eliminating the path to dillute your motor oil with fuel, etc. As far as being easier, I don't agree with that. Bypasiing the FDC is pretty simple; I even made a youtube video! Being done by bypassing the FDC is better than being done by turning up the fuel.
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