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I'll summarize my thoughts on the whole project looking back that far:
The following statement is going to hurt some feelings...
In short summary the NHC-250 is a waste of time and money to attempt to squeeze more power out of.
If you want it reliable and simple leave it alone.
If you...
I seeing a max of 14 psi. Truck is running pretty clean with really no smoke, but it pulls better. Can't wait to get my other buttons to add some fuel :grin:
Here's the new autometer guages mounted on the column with autometer mounting pods. They use a standard hose clamp to mount to the...
Also for anyone who cares to know about the governor spring and shims: "each .001 inch shim thickness will change the speed approximately 2 rpm. Shims are available in .005, .010, .020 thickness. If over .150 shims are required, replace the spring."
From talking to some of my truck guys they...
I got the gauge mounted in the new pod on the column with the pyro, it's hooked up but the light is not wired in yet. I will shoot a pic tomorrow and post it. They both look good mounted there, are easy to see, and I did not have to cut any holes to mount them.
I just got my hands on a...
I would like to hear from a few guys that have done a similar turbo mod to a NHC250 with regards to injector, pump and other mods, and what buttons and pump settings they are running, with boost levels with EGT's
Anyone have any specs they care to share, I know i've read in the past forums...
On a non turbo, what kind of egts do you think I would get by just changing the button from 27 to 15,
What is the thought on combining the button change and the 350 injector install on a non turbo 250, will things just be to hot for the engine, I do not mind blowing smoke, just do not want to...
Just changed from the number 27 (stock) fuel button to a number 15. It pulls better and gets up and goes much better, egt's are running max of 1050 pre turbo on a long hard pull.
I am going to do a little shim work on the pump, then maybe a different button to see if I can squeeze a little more...
The guages are all up and working, just waiting for the other pod to mount the boost guage on the steering column next to the pyro.
When I got this truck the fuel was turned a full 8 turns out, the egts at that point with no turbo would run 1350 degs, and then I had to back out to keep from...
Whats wrong with the exhaust?
The air inlet plumbing is temporary until the aluminum 51/2" tubing arrives and a couple new rubber elbows. The ones in place are freebees from a junkyard.
The exhaust manifold is a high flow from a big cam. The air/water aftercooler is from a BC2 I believe, I did not yet hook up cooling water to it, I really just liked the way it simplified air intake plumbing. After trails I will plumb water to it for cooling.
I do not consider a retrofit...
Hi again guys, after many other projects around the place I finally got to work on my M923. I rounded up the parts to fit the turbo on the NHC-250 to get a little more from it. Before anyone starts screaming about blowing it up, have no worries, I have a big cam on standby ;). I will start with...
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