furious70

got my boost gauge on finally, EGT is on hold till i do the 16cm^2.<br><br>goin up some 6% hills empty i can get it to pull 15psi, not bad i thought. but I don't pull any boost in most 'normal' driving around town and such, and don't pull any down the road until i get up around 75mph. These 21cm^2 housings really are lazy!

nascar mark

You should be fine for now but don't up your fuel any more until you get egt gauge as its the most important one. Safe than sorry.

furious70

I understand what you're saying, but I don't think it's possible to get a 1st gen with the 21cm housing too hot

Alec

I beg to disagree -- If I mash the pedal to the floor at 1700rpm, I can get my EGT's to climb past 1100 (post turbo). The big housing is actually worse for EGT's because the richer burn gives hotter exhaust gasses. There is a sweet spot (around the 16cm^2 size) that gives you the lowest EGT.

Monty

[quote author=asilitch link=board=16;threadid=5669;start=0#50291 date=1034178824]<br>I beg to disagree -- If I mash the pedal to the floor at 1700rpm, I can get my EGT's to climb past 1100 (post turbo). The big housing is actually worse for EGT's because the richer burn gives hotter exhaust gasses. There is a sweet spot (around the 16cm^2 size) that gives you the lowest EGT.<br>[/quote]<br><br>I agree, thats one reason guys switch to the 21; is for lower EGT's. When I had the 21 housing (and never again), I could EASILY get the EGT's in the red with pump mods. <br><br>Most people think that an EGT gauge is not needed until the fuel is enhanced. Well, there wrong. Pulling a pretty heavy load on a stock truck will get you in the red. If you dont have the proper instrumentation, how are you gonna know? As Mark said, your better safe than sorry.

furious70

i'll have to disagree on one point, with the truck as it came from the factory and in good repair, there is no way u will hurt it in an overtemp EGT. I've talked to my uncle (chryco mech) and the diesel shop that i had do the tune up (and is very well reguarded in this area) and both said an EGT gauge was a waste of $ on a stock truck.<br><br>and...methinks Okie turns his screws a lot further than i did :P<br><br>

Monty

[quote author=furious70 link=board=16;threadid=5669;start=0#50891 date=1034256635]
i'll have to disagree on one point, with the truck as it came from the factory and in good repair, there is no way u will hurt it in an overtemp EGT. I've talked to my uncle (chryco mech) and the diesel shop that i had do the tune up (and is very well reguarded in this area) and both said an EGT gauge was a waste of $ on a stock truck


[/quote]

: Well say what you want too..but I have seen several stock 12v's and 24v's get in the red mark while pulling the Arbuckles in Southern Oklahoma. The H.O 24's seem to get there the quickest as far as EGT's go.

This is a clip from http://www.dieselinjection.net

WHAT SHOULD I BE AWARE OF?

Pyrometers are not generally installed as original equipment on diesel pickup’s or motor homes. Are they necessary, desirable, or simply good protection to ensure safe performance? Let us share some experiences.

In 1991, while driving in a 1989 Dodge pickup with a Cummins engine pulling a loaded 5’ X 8’ utility trailer, at the 470 bypass exit of I-70 on the western side of Denver the E.G.T. was 1200 degrees in fourth gear at 60 mph. with light throttle. Forget fifth gear. Even though there was enough horsepower to pull in that gear the E.G.T. was too high! It is not a good idea to allow a diesel engine to operate at these temperatures. Especially when you are on the road and remote from your own diesel engine shop. There was no melt down of pistons because this pickup had proper and adequate instrumentation including a pyrometer.

Plans for the next day included a drive in the Dodge up Pikes Peak to an elevation of 14,000 feet. How in the world would the E.G.T. be kept below 1200 degrees at 14,000 feet if that’s where it is at 5280 feet? For every 1000 feet in elevation the engine loses 3% of its HP. It feels more like 6%. The E.G.T. may be as much as 200 degrees higher at 10,000 feet than at sea level.

At Pikes Peak, with the trailer left at the bottom during the ascent, the pyrometer indicated an E.G.T. of 1400 degrees. The engine was kept in fourth gear for 5 seconds while at this temperature. The problem was not a lack of horsepower. Horsepower was available but could not be used because of the high E.G.T. Remember, aluminum melts at 1350 degrees. After 5 seconds at 1400 degrees downshifting from fourth to third and then to second solved the problem.

DRIVING BLIND WITHOUT INSTRUMENTATION

Without a pyrometer in a turbocharged diesel engine you are driving blind. You have absolutely no idea of what kind of damage you may be doing to your engine. Forget water temperature as your guideline to determine E.G.T. Water temperature can be at 190 degrees and the E.G.T. can be over 1400 degrees. E.G.T. can rise in four seconds at altitude or if there is a loss of turbo boost.

dodgeman01

I have a 93 ctd and I have made all the adjustments to the pump That I can. I was wandering if there was anyway to turn down the idle? I have adjusted it as far as it will go and I cannot turn up the fuel screw anymore withought the idle going up too.<br>Thanks Aaron

Monty

To adjust the idle, look at the front of the pump. Do you see the all thread and nut closest to the engine under the AFC Diapraghm? Take the throttle linkage off and turn the locknut in a couple of turns. The hardest part of this is breaking loose the lock nut on the all thread. I used a hammer and a dull chisel and tapped one side of the nut until it turned. <br><br>If this doesnt take out your high idle symptom. Go to the throttle linkage. This is the rod with a ball/socket end. You may need to lengthen or shorten this. After this is done, make sure the throttle arm is resting on the all thread when in the idle position. If not, keep adjusting the throttle linkage until it is.

dodgeman01

Okie I have already done that. Is this as far as I can go? There is no more thread left on the throttle linkage. She sure does run a lot better but I always want more. <br><br> Here is another question. anybody had any problems with the autos shifting into overdrive? mine does not shift until I hit 65mph. It use to shift at 50 or 45?

furious70

the arbuckles aren't even a very big hill :P<br><br>we've hammered on my brother's 89 (with a 12cm wastegated)up some 6 and 7% and have never had it run more than 1100*, don't know what else to say i guess?

Bob Beauchaine

After 40+ years of &quot;playing&quot; with all types of vehicles some of which grossed out at 100,000 lbs I feel that instrumentation is CRITICAL. It was one of the first things I added to my '93. When I added my a new &quot;built&quot; VE pump my boost and egt's dropped 100+ degrees. My egt probe is pre turbo and only goes to 1100 degrees if I am towing up a long hill. If asilitch is seeing 1100 post turbo his pre turbo temp is close to 1300 and that is approaching melt down! Guages are not that big of an investment to protect your investment in CTD.

nascar mark

[quote author=dodgeman01 link=board=16;threadid=5669;start=0#52193 date=1034486322] <br><br> Here is another question. anybody had any problems with the autos shifting into overdrive? mine does not shift until I hit 65mph. It use to shift at 50 or 45? <br>[/quote]<br><br>You need to adjust the tps with a 10mm wrench. Just under the bracket for the tps and up from the throtle. Move it a hair counter clockwise, which will raise your o.d. shift higher.<br><br>mark

Monty

[quote author=furious70 link=board=16;threadid=5669;start=0#52650 date=1034602861]<br>the arbuckles aren't even a very big hill :P<br><br>[/quote]<br><br>Dont you think that states my point more clearly?

furious70

well, i would think someone would be talkin to dodge about this? if i melted down a $40k truck pulling the arbuckles I'd be pretty pi_ _ed off....