;DThanks to you Monty for your article on setting up my first gen pump. I have a 93 that suffered badly from no power. All I did was break off the little ring on the screw under the cover on the back side of the pump and give it somewhere around two turns in and viola, alot more power. Do you think that I should follow thru and do the other pump adjustments? And the all important question is, aside from the weak Auto transmission, what is the down side of this for your motor, if any? Anyway, you really helped me out. Thanks

 

Your exaust temps will be up. You should get an egt gauge if you do not have one.

 

You really need a pyrometer if yo are going to turn up your fuel.

I am also a very big proponent of adjusting the AFC eccentric.

 

Ok, I guess that I should keep my foot out of it then until I get my EGT gage. May I ask you another question or two? As long as I am being careful with my accelerator and don't push it or take a big load, is there any problem until I get my gage?
Also, the AFC eccentric you are referring to, is that the one you access thru the top of the pump? I probably should back off on my fuel some anyway, the Idle is a little hi and I can't bring it down further. One thing though, it does not smoke much at all even under load, is that good? Thanx guys!

 

You shouldn't have much to worry about if your not working it hard. I have to be stomping on it to get the temp up, no intercooler, stock injectors. Your biggest concern should be knowing when it's cooled enuff to shut down. Particularly if your idle is higher than stock. At least get a pyrometer to know when to shut er off.

 

Even with your foot out of it, I found that when I adjusted the AFC (yes, that is the diaphragm under the cover with 4 screws and a little u - shaped pressure line running to the manifold) I could get dangerous EGT's running the engine below 2000 rpm (Empty, uphill)! So if you are gentle, and keep it wound out, you should be safe -- but you really need a pyrometer!

I don't think that you can really use smoke as a judge of EGT's/safety.

Just wait until you buy an Old SMokey AFC pin, some custom DDIII's and a hybrid turbo -- then you will really need that pyro.

Have fun,
Alec

 

Alec, I have my fuel screw turned up quite a bit (stock, black paint), and have to floor it up hill to push the danger zone, empty. I'm thinking the injectors make the biggest differance. Now that you had the new pin awhile, how's it performing? I'm leaning on one, but thinking I'll need injectors first to releave strain on the pump.

 

Sorry for the confusion: I have only ADJUSTED my AFC -- NOT purchased an Old Smoky pin -- and put on a 12cm housing. Everything else is stock.

What I was trying to say, is that even with this little adjustment, I could get toasty temps fast at 17-1800 rpm and my stock 21cm housing, but I think that ADJUSTING the stock pin is the best bang for your buck, period, when getting started.

I do think Mike did a good job designing his pin, however.

Alec

 

Okeydoke, I guess the 21cm would let it heat up, went from 18-16.

 

[quote author=dana70 link=board=9;threadid=20436;start=0#msg191762 date=1065090761]
;DThanks to you Monty for your article on setting up my first gen pump. I have a 93 that suffered badly from no power. All I did was break off the little ring on the screw under the cover on the back side of the pump and give it somewhere around two turns in and viola, alot more power. Do you think that I should follow thru and do the other pump adjustments? And the all important question is, aside from the weak Auto transmission, what is the down side of this for your motor, if any? Anyway, you really helped me out. Thanks
[/quote]

Glad that I could help

 

You can teach an old man new tricks. It just takes longer.
Monty - - Want to adjust the fuel screw. Finally got the plastic cap off and promptly lost it. I can see it against the engine. Should I try to retrieve it or just forget about it? As for the metal collar, is it necessary to replace it? I assume the answer is no, but whenever I assume something you know what happens. Lordy, nothing’s easy to get at. Other than standing on my head, any suggestions? :P
Thanx

 

If you are reffering to the tamper proof covering over the full fuel screw, I wouldnt worry about it. More likely than not you will be back in there adjusting somemore. As for the lock collar that is tacked on the screw, mine has mysteriously vanished forever. The lock collar is only a tamper proof device that is not crucial. The only thing that I can think of on the fuel screw that is crucial is the o ring that is on the screw inside the pump and the lock nut.

 

[quote author=The Old Man link=board=9;threadid=20436;start=0#msg192746 date=1065291558]
You can teach an old man new tricks. It just takes longer.
Monty - - Want to adjust the fuel screw. Finally got the plastic cap off and promptly lost it. I can see it against the engine. Should I try to retrieve it or just forget about it? As for the metal collar, is it necessary to replace it? I assume the answer is no, but whenever I assume something you know what happens. Lordy, nothing’s easy to get at. Other than standing on my head, any suggestions? :P
Thanx

[/quote]
You were able to get yours off without mangling it?

 

I managed to remove my cap without much trouble and once I removed the locking ring and heard the little "tink tink" it made on the floor and saw what a difference the adjustment made, I didn't go lookin' for it either. I am going to take that advice though and get the pyro and boost gage. Also I believe the next wise thing for me to do is to get the air filter media and 4" exhaust. With the 4" pipe kits, do you need to do anything to the down commer pipe? Also my idle is high and the accelerator linkage stop screw adjustment behind the pump is all used up. Talk more later. Thanks, Lew

 

Nope, it didn't get mangled. Just sitting as pretty as you please against the engine and not goin' anywhere. Now the locking ring is a different story. This baby is my only ride and I'm one of those who's all thumbs and I'm a wimp. I look at the ring - - try to think how I'm going to remove it and then panic. What if I screw up the screw, and no pun intended. :'( I'm going to have new injectors put in soon and maybe let someone who knows what he's doing remove the ring

Lew, I agree about the gauges. I just got them in a while back. Then took a trip goin' over both the Cascades and the Blues. And this was with a 3000+# truck camper. Before the gauges I was always afraid of burning up the tranny so never used the O/D, never working it hard on a hill. This trip with the gauges made the driving a heck of a lot more fun. Just watched the exhaust and tranny temps - - locked out the O/D only on long or steep inclines or if the exhaust started to climb too much. I learned just how much I was babying it before.

This site is getting me in trouble. Before DTR I was real happy with this old truck. Now I want more out of it.