93 D350 5.9 12V
I WANT A LITTLE MORE POWER NOTHING RADICAL**WHAT CAN I DO ?IT IS ALL STOCK AND REAL NICE THE WAY IT IS ***4SPD AUTO TRANS AND IN DRIVE IT IS A 62MPH TRUCK IN OD IT IS A 85 MPH TRUCK BEFORE IT GOES AGAINST THE GOV.DONT WANT TO SPEND A FORTUNE** ANY SUGGESTIONS

 

check this site out...

http://www.purecummins.com/catalog/1gen12v/

I havent come across much for the 1st gen 12v motors but I havent been looking either. Search for "cummins 12 valve performance" on the web and see what you can come up with. This was my 1st result in my quick search...

 

the best bang for the buck is the 3,200 gsk (govenor spring kit) on the 1st gen's, it wont really raise the power level, but it makes them a lot better to drive, you wont de-fuel untill 3,200 rpm's, i could tell you how to adjust the pump for a lot more power, but the auto trans will suffer if you drive with any kind of heavy foot, and you should really have gauges for any kind of pump adjustments, the "gsk" will cost you about $16 delivered from ebay and is well worth the time and money, however, you need some mechanicall skills to install, it's for the faint of heart

 

thanks guys big help
dodgetrucker check ur e-mail i had some ???'s for u u can post here or e-mail me back here at work thanks again most helpful

 

do you have any gauges EGT, boost psi, trans temp? you can remove the collar on the power screw, to get a few more turns, but go to far with it and you may get the dreaded "run away" the star wheel under the diaphram can be loosened all the way (down) remove the plastic washer in the fuel pin, you can grind the pin (thats what i do) and turn the smoke screw as far down as you like, the fuel pin adjustments will help out a bit but i would do a whole lot more with the power screw on a stock setup,

 

no have no gauges **what would you suggest that i do** i was only thinking 1 turn on the power screw and two clicks on the ring *then smoke or unsmoke**never messed with one just playing with it*i am a gas engine man until now

 

the fuel pin settings wont really increase power, just brings it on sooner, for your best performance, i would turn the star wheel all the way down, remove the plastic washer, and put the deepest part of the fuel pin facing forward, then just adjust your smoke screw to what you want, 1 turn is about all you should do on the power screw without a pyrometer, but you should still install one ASAP, and the 3200 gsk was my favorite mod of all on my first gen, it really brings them to life!

 

what egt* is safe on that stock engine?? i want to do the 3200gsk but reading about it seemed difiacult to install never worked an injection pump before( built alot of carbs & crap) never had a diesel before i inhareted this from my dad when he past. damn nice truck tho.

 

1250-1300* is max, any more and the pistons will start to take a different shape... the gsk is a little difficult, but if you take your time and have paitience, it will be ok, if you decide to do it let me know and i will give you a part number for a tool that will simpify it a little

 

thanks dodgetruckes that really helped alot--i took out the washer-turned in the wheel- and went 1 turn or so on the power screw and what a difference---i was resd ing on the 3200gsk and i think i can do that ok i am ordering it today--they have pics and good instructions on how it is done on e-bay where you buy it i looked at it and does not look to be that bad of a job---what tool are you talking about????
Thanks again Mike