Fuel pin discussion

[RCCUMMINS89]

Pics sent.... you'll notice in the pictures that the BD pin is actually cut more at zero boost than the M&H 3 pin. However, we plan on changing that part. We went off my buddies truck and used his marks.

[BILTIT]

From Rccummins89:

[RCCUMMINS89]

BD on the right. Like I said... it too can be improved upon.

[AHineman]

Thanks for the pic. Looks just like the "Old Smokey" pin from back in the day....

http://www.dieseltruckresource.com/forums/1st-gen-ram-all-topics-93/old-smokeys-fuel-pin-31123/


That was back in 2003. Funny how somethings have changed, and some have stayed the same.

[ellis93]

The ramp is too short for the given fuel-pin stroke. This results in additional fueling at idle, as well as it stopping further fuel enrichment before the end of the fuel-pin
m

BC thank you for sharing this.

[RCCUMMINS89]

If you look, the old smokey pin is notched in at the bottom

[RCCUMMINS89]

This results in additional fueling at idle, as well as it stopping further fuel enrichment before the end of the fuel-pin
m

BC thank you for sharing this.

I think what BC said here is a misleading way of wording it. Not sure if it is intentional or not.

As, once again, AFC has zero affect on SUSTAINED SPEED (non acceleration) fuel/air enrichment. The AFC is nothing more than a throttle input regulator (injection event LENGTH regulator). At a given speed, the engine's lean/rich mixture is 100% controlled by the air flow. Now... the exhaust lean/rich result (smoke,haze, etc..) is also controlled by timing, and the injection event (such as injection pressure, injection event lenght, compression, burn time, etc, etc...)

[ellis93]