Just wanted to mention my experiences with fuel pins and smoke.

I do not like much smoke at all, prefer to keep it to smallest amount possible.

Being a standard truck it is easy to be in too high of a gear (to low of rpm) and have to make a quick acceleration, this causes alot of smoke until the turbo can make some boost.

I started with a DennyT STG2 but it was real smokey. I then swapped it for a DennyT STG1, better but still too smokey. After searching and reading it looks like Eric (RCCummins) tried and recommended the BD pin (NOT Bullydog pin). I pulled the trigger on one and whalla! The smoke has been reduced by ~50% on spool up/emergency accel with low rpm etc.

The turbo seems to spool quicker/crisper to boot. I still get a puff of hazy grey but is nothing like i used to get and it clears up much faster than before.

Now i need to adjust my starwheel as i am not adding enough fuel in the low/moderate boost territory.

 

I got a BD pin also and I like it, I think most of my smoke is from the 190 injectors.

 

Yes i would imagine so, i am still running stock injectors.

For a STD truck i think this is the only pin to consider, unless you like alot of black smoke which just pisses people off anyways.

 

Good to know, as I find my Denny T stage 1 a little too smokey as well in my black crew even with the HX-35 turbo upgrade.

I am going to try just rotating my stock pin in my white crew, but will keep the BD pin in mind if I "need" more fuel.
My white crew is still running the stock turbo at 30 PSI.

 

I have to ask how your getting 30 lbs out of the stock turbo, and housing?

But thanks you BILTIT...this is very good information. I am jotting it down to put on my "Might need" list. I'll be trying the rotated pin like Oliver is going to do, first though.

 

Thrashing,
When I turned in my fuel screw 1 3/4 turn my boost went from 18 PSI IIRC to 32 PSI!
I turned down the fuel screw 1/4 turn to a total 1 1/2 turn from stock and I got it down to 30 PSI, which is all I want to subject my turbo too.
My tamper proof stock collar is still on my fuel screw and I am pretty far from bottoming out on it.
It was always a really strong running motor.
It is a Cummins Recon motor.

My only other mods on that motor are the 3 inch Cooler TubeZ crossover.

 

I am getting 28 PSI with my fuel screw turned in 1.5 turns. But it doesn't spool up as fast as I would like. If you don't hit it just right it is pretty flat on the bottom. But it is a baby H1c.

 

Thanks guys...I'll write that down on my "to do" list.

 

Here we go again corrupting you

 

Thrashing, I regularly hit the peg on my Bank's 30psi boost gauge. I had rebuilt stock injectors, Denny T Stage 1, Timing to the head, a good stock lift pump, starwheel almost all the way up, 4" downpipe, K$N filter.

 

What pin, if any, would the gurus recommend for a 93 with a 518 auto? Thinking of running a HX35. Only shooting for about 300.

 

For what it's worth, it is EASY to hit 30-PSI on a stock engine/turbo NON-intercooled.

I have never yet messed with the fuel pin, star-wheel, and such on my 1989 non-IC engine and, with the fuel-screw turned in 1-1/2 turns I can easily hit 30-PSI on the boost gauge.

I believe the I/C set-ups absorb a lot of the boost.

 

Who builds/markets this "BD" pin ??

Thanks.

 

The other thing is the '91.5-'93 12Vs have a smaller injector, so a little fuel screw tuning on the earlier motors is more noticeable with the bigger stock injectors.

 

I bought mine from Jegs with the 3200 gov spring.