4W1765 THE GOOD THE BAD & THE UGLY

So since we’re going to all this trouble of mounting a gear type pump, regulator, extra support stands for the rocker shaft, clearancing the block, bigger push tubes, machining piston tops etc. Why not go to a custom grind on the cam? They are plenty available. Why not find a cyclone pump, or convert it to a Bosch….

 

The B governor section isn’t gonna cure your fuel blockage. Just isn’t. As far as clearing up what I’m dancing around idk

 

See everyone wants this info to build these monsters and they work off of a pattern. In truth they have no god #### clue what timing is or does or fuel delivery. If they worked on #### every day the answer you want be right under there nose. See I posted it on Facebook once and was told by the top dog I was wrong. I almost posted a pic then said na they can figure it out on there own. This is extremely conceded and by God arrogant however not one time did I have to catch my breath battling another mechanical with mine. Running all CAT parts. Some things you just don’t tell make them learn it on their own

 

There are other options for fuel pumps. What good is comparing a cam with an injector lobe to one that doesn’t have an injector lobe? Over head cam verses push tube….they are nothing alike I fail to see what there is to compare. Both engines respond differently to lobe separation, lift and duration

 

They only make the 100-7408 now. Regarding the 4W-1765 it was phased out due to the valve train issues it caused. Not because it produced any more or less. The 100-7408 is just an updated number for the 3797. There was a rumor and a post that the 460 PEEC had a top secret different cam from factory. That you put the 3797 in it if it needed replaced. That was nothing more than a farce. I’ve had 2 of those motors and both had the 3797 in it from the factory I know that for facts. Their is no info on the internet cause their is none to be had. What makes you think you need more cam for more displacement? Yes it helps if offered but it’s just not. Even in the E platform the only difference in them is fuel lobe. Another little FYI, the valves from B all the way to a C18 are the exact same size. Now let’s talk about engines where cam selection is abundant the biggest mistake made there is selecting too much cam for the heads or for the CFM they flow on the intake as well as exhaust side. Bigger valves in those heads don’t improve the intake runner or exhaust runner. While the bigger valves help they are still limited by flow in and out. So you port match but you still are not there. It takes a better more improved head. Where are you getting one of those for a 3406B.

 

I can show you a daily driver all CAT parts that put 682 to the rollers and 2032 on torque. I only got to pull it to 1900 the dyno at Joplin Freightliner was getting hot and they shut me down. That was also before any fine tuning and going a different route on both turbos. That was its break in run. Never took it back cause it’s just a number