[38-55wcf]

i have a 93 5 speed
if i keep stock injectors, 4" turbo, 6" intake, hd clutch, and maybe 60mm upgrade with a 18cm exhaust, would have no afc really be that big of a deal. I mean i know it wil smoke a lot, yet if i keep my foot out of it, it should be okay for driving and towing up to 18,000. I don't care about smoke or haze. Just want to not spend money on a fuel pin and injectors. It is just a work truck and play truck. Will not see much hills, no truck pulling,
if i do gut it, then if i do the 1/4-20 screw thing, can i replace the lever with the screws or will i have to put balls back in.
anyone have any videos of no afc levered trucks?
thanks

 

[92betsy]

Just grind the deep side of your fuel pin for free and keep fuel control for towing.

 

[38-55wcf]

i don't think i can get flu fuel though with a ground fuel pin
only with 100 dollar denny t or a gutted afc lever
would it be to high get for towing if i turned fuel down

 

[RCCUMMINS89]

a grind pin will allow full travel. (if ground correctly)

 

[Philip]

Towing up to 18K most likely will have EGT problems with no AFC.

Do a search on EGt problems with aftermarket fuel pins and towing.

 

[38-55wcf]

so would w/m help lower egts enough
how bout cooler tubs and intake horn
is a exhuast manifold to consider, supposedly drops egts, just don't know how much

 

[W350_1992]

w/m could knock 200* off the egt's, from what i'v read about aftermarket manifolds there was only one brand that actually helped. Intercooler upgrade would be a good bet, like a 2nd gen or PS intercooler.

 

[First_Gen_smokuh]

im no diesel wizard but i bought my truck with everything turned up and etc... decided i wanted to take a peak under my AFC cover and turn my star nut but uhm i didnt see a fuel pin and its fine until you get on it then it looks like a locomotive starting up

 

[moparbubba]

I run a denny t afc delete and mine runs great.

Sent from my DROIDX

 

[RCCUMMINS89]

It depends on your pump tuning, how you drive, and how you use the truck.

On a "stock pump" you can pull the afc lever and they don't smoke that much. On a healthy high cc flowing pump it will be un streetable and fuel economy will be absolutely miserable.

On my truck I tried no afc lever for a week. fuel economy was about 12 at sustained highway speeds and my egts were utterly ridiculous.

Right now at 60mph my egts are roughly 625-675 and boost is around 6-8
no afc at 60 my egts were 850-1000 and boost was still around 6-8.
I couldn't even imagine if I was trying to tow.

Think of it as a rich/lean mixture lever and it will all come clear.

Also there is a reason why denny t makes an afc delete where no one else does...... He cuts his pins too deep and hundreds of people get tired of replacing those o rings. Personally I went through 6 o rings before I was able to find the longer slide pin part number.

 

[moparbubba]

I get around 20mpg same as the stage two and bottomed out starwheel at 60mph im at 650 to 700. Around 8 lbs and 29 at wot and at wot 1200° max and i have no idle haze can drive with no smoke and can tow 12k with no issues.

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[RCCUMMINS89]

Well, that is good to hear. But ya if anyone is running a stage 2, they will not notice any difference in a delete. The stage 2 is essentially full fuel all the time, the afc lever doesn't really move very much anyways.

But I can assure you if you get bigger injectors or turn your pump up more it will really be noticeable. When I had the wot egt/boost numbers as you have it didn't make any difference what fuel pin or afc lever mods I had it didn't make any difference at cruising. When I did my injectors......well, it was a totally different animal.

 

[moparbubba]

Ive got a longer fuel screw and its 2 turns back from runaway. No idle screws set idle with the fuel screw so its as "maxed" out as i can get a stock 12mm with out having it benched....
And denny runs his with 5x14s and a s300 and has similar results.

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[RCCUMMINS89]

however, you are only getting 29 # boost and 1200 degrees shows you are not getting all that much fuel.

I'm getting 50+ if I wanted (watergate adjustments) and can max my pyro. Pumps are different from truck to truck.

 

[moparbubba]

Considering im running a lag master coolertubz timing spacer and timing bump grid delete and stock ic that 29psi is closer to 35 or 40.

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[moparbubba]

And i can black out behind me if need be


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[RCCUMMINS89]

a de-tuned stock truck can blackout a lane with no afc....

First of all let me apologize, I can sometimes sound argumentative when that is not what I am trying to do.

You are correct on your boost numbers being "off" with your timing differences. The rest has no difference. I have a spacer and I picked up like 8 to 10 pounds of boost wot when I put my timing to stock with the spacer as opposed to before when I had the bump and the spacer. I also lost probably 50 ponies backing the timing off, however fuel economy went up, so for right now I'm leaving it until I build twins.

My point is people with aftermarket injectors and moving more fuel have a more noticeable affect with the afc.

Also to my knowledge there is not one person in the "higher" hp/tq range that have an afc delete. Even the dyno queens have a working afc.

That is for a reason, it will run cleaner, build boost faster, get better fuel economy, and run better for longer. It allows you to control your fuel/air mixture throughout the rpm and load band. And just like a gasoline engine or any other combustable there is a sweet spot for the ratio to get the best and quickest boom.

 

[moparbubba]

I disagree the coolertubz dropped 5lbs of boost i was at 35psi before them.
Now the grid delete i agree has almost no effect. On a stock to moderate fueled truck the delete is fine.
But i do agree they dont use on a high hp truck. if you dumping fuel like a puller or dyno queen full fuel down low will kill spool stomp uses a stage one for that very reason.

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[38-55wcf]

thanks for everything
i thought that grinding the afc foot or removing it, makes your fuel pin and star wheel unresponsive. Does the full power screw still affect power after you remove afc lever
i also searched on google and on another forum, i read that with no afc you have full fuel and no risk of runaway and both afc things(fuel pin, star wheel) and full power screw have no use anymore. Is this true

 

[RCCUMMINS89]

Uh...... No

An afc delete has absolutely no difference on runaway or the affects of the fuel screw.

It by passes your fuel pin and starwheel control. Another thing is have fun driving down a bumpy dirt road with an afc delete. especially around that 15-20 mph..

Read up more on how the injection pump works. and keep doing what you are now and keep searching and reading, eventually it will start making sense and all fall in place.