did you grind the factory pin? you can only go so far with the factory pin... an aftermarket pin is much more aggressive but a ground stock pin does just fine to satisfy your need of fuel until you get a new precision cut pin -

tower_ofpower's Sig:

One thing i learned in college: DON'T!!! stick your fingers where you wouldn't stick Mr. Happy 89' W250, full fuel 1 1/2 turns, smoke screw flush with the lock, stock pin mildly ground, 1/8th timing bump whole truck refreshing in progress. Soon to be: fuel pin, 366 spring, smooth wall intake tubes once i actually start stock piling some money, turbo and manifold swap, 4" exhaust; 5 if it'll fit. and nozzles.

I did grind the factory pin and didn't get much.. so I pulled out a nice hard round rod and turned it down, then ground the profile I liked into it, bolted it up and away I went! -

Budgreen's Sig:

1993 W350 club cab 4x4 5spd dually.
Homemade custom fuel pin, star wheel and smoke screw cranked. 366 spring, HX35 in a few weeks possibly

any of you guy try running it without the pin, i had my truck like that for a long time i just put a bolt in the diaphram and put it back in, wow what a difference and just so u guys know no the delivery pin cant fall out it is attatched to a lever and it is'nt mutch different then runnin a m&h 5 or a denny t 2 the delivery pin stops about a 1/8 from the chamber wall, the only ill effect that i notice was after about a week i noticed the relief tube on the top of the pump was weeping a little -

1990cummins's Sig:

1990 d350 cummins very tweaked pump, bullydog pin, intercooled, homemade twin turbo, 4'' turbo back to 5'' stacks

The pin will travel farter then the seal. that is were the fuel is coming from. -

RSWORDS's Sig:

farter?
I'm sorry but this cracked me up LOL!! -

Gunmetal's Sig:

I use FAST ORANGE. Though, I must admit.. when I use it I am almost tempted to eat a handful.

12 Valve Proud
www.12valve.com

he said fart -

oklahoma_6speed's Sig:

2001 DODGE. 6 SPEED QUADZILLA ADRENALINE. 5 INCH STRAIGHT PIPED WITH 6 INCH tiP.ARKLAHOMA BOMBER.:old school...its a rural school thingthe new one. 1993 4x4 ect cab in need of donations to make it run better..and thanks to the patience of my beautiful wife for supporting me

It's the simple things in life, aint it? -

simple things or people? -

A wise man once said that it is better to be a smart feller than a fart smeller.
These smilies are great. -

Piers diesel PDR has a pin that is cut "deaper then the denny t II its the factory pin machined but looks clean ....doesnt wear $75 us -

Any pin that starts out as a factory pin is no good, there's just not enough material there to work with.
A good pin will be made from a solid piece of stock and will be heat treated.
Avoid bullydog and ddp because of weak heat treats.

Denny makes a good pin, but it is really aggressive. Good if you want max power, but it will affect fuel economy.
I went with Mikes Old Smoky power pin. Mike designed the original, allowed ddp to use his design initially (now they make them without permission), and bullydog copied his design also.
I've read multiple places Bullydog pins groove badly because of lower quality steel and poor heat treat, so buyer beware. I suspect Bullydog gets them from DDP. -

I dont know how they pulled that off, there is not enough room in teh stock pin to get anywhere NEAR a DennyT Stage 2 or teh M&H pins....

Here is the DennyT Stage 2



Here are the two pins side by side. You can see the difference. The stock pin on the left is rotated to its deepest setting. You can pick up a little more with grinding, but you will never get anywhere near an aftermarket pin.

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