Which do you adjust first... Star wheel or smoke screw? - Page 9 - Dodge Cummins Diesel Forum
94-98 Performance Parts Discussion Discussion of Performance Parts For the 94-98 Trucks No Advertising ...NO ADVERTISING

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post #97 of 165 (permalink) Old 01-08-2014, 10:34 PM
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Take your time

Adjust the star wheel in real small increments until you find your favorite.


98 2500 4x4 ext. cab, 12v, 5spd, Valair dual disc, 63/68/.76, 5x14's, afc mods., #100 Sold
1988 f350 crew cab with a 96 6bt 5spd. 4x4 KDP fixed
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post #98 of 165 (permalink) Old 01-10-2014, 02:34 PM
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Sorry to ask but where are does screw located thanks...
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post #99 of 165 (permalink) Old 01-13-2014, 06:49 PM
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Well done guys!

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post #100 of 165 (permalink) Old 01-24-2014, 01:05 PM
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This thread has inspired me to tune my pump. I have terrible low end throttle response...

97' ECLB 4x4 2500 - 315/70-17 Pro Comp EX MT2 Dodge Off-Road 3.5" long arm suspension, #6 Plate 90HP injectors/boost elbow and BHAF w/ intake elbow, ATS 47RE Built W/ 5 Star Torque Converter, Co-Pilot and Deep Pan
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post #101 of 165 (permalink) Old 01-24-2014, 01:20 PM
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sorry to butt in on your post but I just bought a 98 12 valve that has quite a bit done to it. I have worked on 24 valves, cr 5.9s, and 6.7s. this is my first 12 valve project. when I bought the truck the guy told me the pump has no fuel plate in it. it has a garett 66mm turbo and my egts get out of control if I stay in the throttle very long at all. can I tune my pump without a fuel plate or would I b better off buying a plate before I start trying to tune thepump? and if I need a fuel plate how do I determine which plate is best for my application? any help would be appreciated thanx
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post #102 of 165 (permalink) Old 01-24-2014, 10:11 PM
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You can tune your pipe without a plate. Just can't tune wot fuel. Fuel plate depends on what other fuel mods you have

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97,2wd, auto swapped, Moss Green, 211k, s&b,4in with muffler stock tip (stealth mode engaged ) ,afc mods, kdp,egt boost fp dp,22*,Haisley 5k gsk-60pounders,traction bars, A1 studs+Oring'd block, P&P, A1000 custom fuel setup,5x.018 SAC 145* 300 bar,.025 dvs, 64.5/68/.83 t4 sxe 50mm jgs gate/w screamer pipe
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Dying is always a way bigger concern than egt's...
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post #103 of 165 (permalink) Old 01-24-2014, 10:28 PM
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I know the pump has been worked on by Gillette diesel but not sure what is all done to it. It has bigger injectors but not sure specifics. It has a fass 150.
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post #104 of 165 (permalink) Old 01-25-2014, 12:02 AM
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Ok. Turbo? What are all the mods and what do you wanna do with it? There is a lot of different plates got different fueling needs

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97,2wd, auto swapped, Moss Green, 211k, s&b,4in with muffler stock tip (stealth mode engaged ) ,afc mods, kdp,egt boost fp dp,22*,Haisley 5k gsk-60pounders,traction bars, A1 studs+Oring'd block, P&P, A1000 custom fuel setup,5x.018 SAC 145* 300 bar,.025 dvs, 64.5/68/.83 t4 sxe 50mm jgs gate/w screamer pipe
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Dying is always a way bigger concern than egt's...
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post #105 of 165 (permalink) Old 01-25-2014, 01:13 AM
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Its an s300 66. Its got a 16 cm exhaust housing with a t3 to t4 adapter. Non waste gated.


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post #106 of 165 (permalink) Old 01-26-2014, 03:45 PM
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Is it just a toy? Or do you pull trailers? what injectors?

You need to pretty much tell us every mod and what you wanna do with the truck to give you a somewhat accurate decision

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97,2wd, auto swapped, Moss Green, 211k, s&b,4in with muffler stock tip (stealth mode engaged ) ,afc mods, kdp,egt boost fp dp,22*,Haisley 5k gsk-60pounders,traction bars, A1 studs+Oring'd block, P&P, A1000 custom fuel setup,5x.018 SAC 145* 300 bar,.025 dvs, 64.5/68/.83 t4 sxe 50mm jgs gate/w screamer pipe
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Dying is always a way bigger concern than egt's...
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post #107 of 165 (permalink) Old 01-27-2014, 02:12 AM
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I was just poking threw this great thread and wanted to add one little thing about bench setting your AFC. So your truck makes 43 psi according your boost gauge. You take your AFC off and set the compressor to 40 psi and tune your AFC to be full forward (full fuel) at 40 psi (you want full fuel a few psi before you max out boost to ensure just that FULL FUEL). I am now going to tell you why this way ONLY gets you close and not perfect, as mentioned at least 100 times in this thread. Your boost lines going to your boost gauge have like a 3-4mm inside diameter (I'm just throwing that number out there) however, psi=pressure per squar INCH not PER MILIMETER. When a 1
Inch line will lift 40lbs of weight when charged to 40psi, your 4mm boost gauge will lift, well lets see. 25.4mm per 1 inch. So math: 4÷25.4 will give us what percent difference it is between a 1 inch hose and a boost line. So 4÷25.4=0.1574 or 15.74%. So your boost gauge is 84% (100%-15.74%) smaller than what PSI reading are suppose to be measured in (a 1inch hose). This means when a 1 inch line at 40psi can lift 40lbs your boost hose will only lift 15.74% of that or 6.29lbs. I know most shop hoses are probably 1/2 inch but you understand the idea behind how a different diameter hose affects actual PSI. So to adjust for this, companies (like glowshift, autometer, etc..) make this mathematical adjustment by gearing down the boost gauge to accomidate a small tube, to give an accurate (in charging system measurment). So what I'm trying to say, to get your AFC PERFECT take your boost gauge you have been monitoring (from your truck) so that factor remains the same. Make a T, with boost line running from the AFC into a T fitting, then with a piece of boost line coming from the perpendicular portion of the T (this line will run to your mechanical boost gauge you pulled from your truck). Then, run the last port of the T to the air compressor. Final product should have the AFC and air compressor "inline" on the T fitting and the boost gauge coming off the perpendicular hose. Now set your air compressor so your BOOST gauge reads 40psi. Notice: your air compressor gauge will be quite a few lbs off of what your boost gauge reads. Now you can adjust your AFC to perfection. I set my smoke screw while it was on my truck that way when I took it off to adjust AFC I could set the star wheel perfect with my preboost setting.

**the reason just your air compressor doesn't work is because your air compressor line is much larger than a boost line therefore completely throwing off the pressure per squar INCH ratio many of you forgot when tuning with just an air compressor.

Please let me know if I didn't explain something clearly. This is the only way I have been able to set my AFC and I found my "driving and watch smoke and adjust based on visual smoke, tune " was really far off. Whole new truck and driving experience when tuned in this manor.

98 12v SC 4X4 114K Miles, A5K, SDX 5X18, 4K GSK, KDP, Custom VB, Deep Pan, Peak Diesel IC/B, Devils Own W/M, Head Studs, 60lb VS, 2095 Rack Plug, Barrels moved, Guages (EGT, Boost, Trans Temp), Timed 22* http://s1057.photobucket.com/albums/t398/lwilde13/

Last edited by nSaEvAyL; 01-27-2014 at 02:48 AM.
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post #108 of 165 (permalink) Old 01-28-2014, 01:44 PM
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That's just it. The guy was pretty vague when I bought it. So I'm not sure what is all done to the motor. It's more of a toy and I will pull occasionally. He said the injectors r 50 hp but no dimensions at all. Said the pump was work over by Gillette diesel but he didn't know what they all did to it. It'll break the duals loose in forth gear so it's got good power. If just gets hot fast. Even at 60 psi of boost.


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