4W1765 THE GOOD THE BAD & THE UGLY

You got a restriction in a C pump before the plungers and barrels…..

 

Anytime your pumping liquid if pressure goes up flow goes down. The only way to increase said flow and maintain pressure is by going to a larger pump. So you have that part. But you still got another problem and I’ll tell you it’s not the elbow feeding the injection pump on top of it.

 

I do not have a lot to say about that with Cats but refer to post #3. Maybe someone with one of those high horsepower cams can chime in and tell you how to have great power and mileage. Those type engines are normally designed to run high horsepower at a constant speed. Not changing RPM all the time or running a mid range.
Have a irrigation engine in a tandem flatbed truck. I can baby foot 6.5 MPG. Had a truck blow by me one morning then turn on a turn signal slowing me down to turn right on the next state road. It was my neighbor and he apologized the next time he saw me. Said I did not know that was you and I lost track of where my next road was. Just could not stand to be behind you anymore. The exhaust is like unburned fuel. Made me weezy noxious and my eyes water.
On the other hand I had a condo at the traffic light to the right of me with a 53. I was empty and he was dogging it. Cars were all lined up behind us. Finally I just turned the sky black and left that place. Then when I get to the interstate I am gear bound as it was made when the national speed limit was 55.
A whole lot of BS thrown out there just to say it all has to work together. Also boat motors have the ocean to cool them and you do not. Experimenting can be expensive. I was not trying to make a monster just through all this left over junk from the farm together.
Good luck with what you do.

 

Just curious, but to what extent are you interested in the Performance Capabilities of the Old Iron?

I mean, is this a hobby and a passion you have, or something you want to make a living with? You and @wore out are talking way above my comprehension, but I can't help wondering to what end you are re-engineering a mechanical engine.

Don't get me wrong, I love my B models, but I am curious as to what your expectations are once completed.

 

Stiffer valve springs and bigger push tubes do not change the weak point on the rocker shafts either. Makes that an even bigger issue. Again you can have a pump capable of a 1000 gallons an hour at 60 psi but your not gonna get that to the plungers then when you do they are not gonna be big enough. I will admit I’m doing plenty of assuming here on the expectations. But experience tells me already what they are. A pulling truck sure the juice is worth the squeeze but anyone building a pulling truck ain’t coming here looking for advice

 

Stronger push tubes will help. you could also make extra support stands for the rocker shaft….. I did this on a pulling tractor
I have a b model torn down right now and it looks like it would be really easy to use one of the head bolts to anchor it
Something else to think about would be changing the ratio of the rocker arms to increase valve lift….but then you could likely have to clearance the tops of the piston….easy but just another step
The engine I’m working on actually has the 4w1765 cam in it but idk if it runs better than the other engine that I think has a different cam but there’s probably to many other variables to be able to tell

 

They break on the ends. Outside the support stands 95 percent of the time