Hi All, Don't get me wrong and I know it sounds crazy but I'd really like to know how to LESSEN the power output of a diesel engine WITHOUT hurting economy.....The reason I am thinking about doing this ( BTW I love power in MY truck) is because I run a lawn care company and this summer I will buy another diesel truck for the crew to use (I have been using WVO so fuel costs will be near zero this season)....I want to detune their truck so I won't have to worry about trannies and overall hot rodding on their part (yes I try to hire responsible people but you know how that goes....)....I have thought of doing what I did on my gas truck (installing a spacer under the accel pedal to limit throttle travel but since diesels make so much power down low I didn't think this would be a good approach.....I will also install a turbo timer to keep the turbo and guard against hot shut downs.....only thing I have to figure out....or if you have any ideas it would be appreciated....is how to make the unit (timer) automatically operate when the key is shut off instead of having to press a button (I have the howard timer in my truck)...is there a way of doing this with brand timer or is there another unit that will work better? Thanks in advance for all your help,
Andrew

 

12 or 24 valve?

Rich

 

I was looking at getting a 1993 12 valve w250 like mine... that way mechanical fixes and parts will be the same on both trucks (the second truck is bone stock....looks decent and has 189K miles) .
Andrew

 

Just mount a small Tupperware bowl lined with tinfoil to the roof and tell them you can monitor them via GPS.

I'd be wary of "detuning" due to liability concerns.
If they "can't move fast enough to avoid an accident" due to modifications, it could be big trouble.

 

Andy- The easiest thing to do on a 1st gen would be to turn the high idle screw in some. That's the same thing as a block under the pedal, only harder for a driver to figure out. The high idle screw is on the top of the pump, it stops the throttle lever when you floor the truck.

I don't think this is necessary on a stock truck, the trans will be fine with a stock engine.

Get in touch with Howard, he can tell you how to wire the timer. I don't like the idea of making it automatic, though. Your driver needs to be able to shut the truck off immediately in an emergency situation. I would install the timer and instruct the driver in its use, and stress to him that this is something you want done, but I wouldn't make it automatic.

 

get yourself some kind of funky looking box with some wires and make it look like its hooked up somewhere under the dash, tell them its a data recorder!!! But youll have to be breative with where the wiring goes, run it into the wirng harness somewhere so they will be detured to dig for it. I have a 94 gmc jimmy with some sort of box wired in under the seat ( have no idea what it is) but it would work perfect to fool someone!! lol

 

Instead of a timer you can use the Isspro unit that shuts the engine off once the EGT hits 300 degrees.

 

I wouldn't worry about the turbo cool down. I've got 78k miles on my truck and I've never once waited to cool it off before I shut it down. 400-450* shut downs are not uncommon. My turbo still spins just as smoothly as the day I bought it. Even with the comp, I never let it cool off.

As far as hurting the tranny, I don't really think you could do it on a stock truck. I don't know if the 93's are the same as the 2nd gen 12v's, but couldn't you move the plate back some on those and detune it that way?

 

Different pump. See wannadiesel's post.

 

I would simply back out the fuel screw until the max boost is about 12-16 psi. Many trucks were this low from the factory, so you may not have to even do this adjustment, just verify it with a boost gauge.

 

u disgust me ugh detune...here i am looking for money for an ATS converter and then bombing the c$ap out of it and u wanna detune...arghh just messin with ya buddy...yeah turn the screw a few turns the other way on that 1st gen and drive like u have an egg under ur pedal...if u wanna invest a lil bit then get some weener injectors like mine

good luck

 

I saw a timer on THIS SITE that said it was automatic. I guess meaning you didnt have to turn it on everytime you shut down. I thought it was pretty cheap too.

 

I would just leave it stock.

 

Thanks for the help guys!......I'll try that screw adjustment when I get the other truck....I couldn't stand the thought of doing that to the one I drive! I may also use the block or wood (well hidden of course) to further limit to speed....0 to sixty times?.....I don't think it'll do 60!.....well maybe downhill!....That's pure evil huh? ;-)
Andrew

 

u sinner...evil indeed