Timing

[Archive]

Okay guys since I am new to the diesel can some one tell me how to advance the timing???? I have a 94 3500 dually with 5. 9L cummins. and what should I set it at???

 

[Archive]

You need a special tool kit to do it. The timing is set by measuring lift in the number 1 delivery valve at TDC on cylinder 1 and resetting the drive gear for the pump so that the lift is correct for the desired timing. Do a search for P7100 timing. The procedure is described very well in at least one thread.

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Joe George
Eureka, CA

'95 2500 CC auto 4X4,3. 54,Combo EGT/boost guage,custom switch panel,PacBrake,TST #5,BD valve body,Automatic motorhome steps on both sides,Foldacover hard bed cover,Cummins chrome kit,Black steel grill guard,Front hitch receiver

 

[Archive]

The way that the timing is done at a reputable Diesel Performance shop is to use an electronic timing tool that monitors fuel pulses in the #1 injection line via an inductive pickup which clamps over the line. The balancer is marked at TDC and the tach pickup is marked at its center. A timing light verifies the timing, while the tool lets you dial in the timing until the mark on the balancer lines up with the mark on the tach pickup. This is done with the engine running. Dynamic timing is different than static timing in the fact that these engines don't have a timing advance in them, so you want to optimize your timing for the RPM you'll be making power at. Static timing can't and won't forecast at what RPM a certain setting will work better. Plus, in doing the Dial gauge in the delivery valve, there is always the chance for the pump to spring back a few more degrees than the gauge gives you room to adjust for. With Dynamic Timing, check it, reference how far you'll need to achieve your result, crack the gear loose at TDC, and rotate the engine to the desired result. Diesel injection is a precise thing, timing of it is crucial. 0. 10 degrees can and will make a difference. I know it's a long post, but many guys out there do their timing and either do it wrong, or the timing slips 90 degrees on them while driving and they have a hard time finding the correct timing once again. If you have any doubts, seek a professional who is familiar with these engines and has the proper equipment. #ad


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Chris Timochko
1997 5sp 4X4, HX40, BD 4" Brake, Marine Compression, Custom Tuned Injection Pump, 370B Injection Nozzles, Delivery Valves, Governor & AFC Spring Kit, Psychotty Air, Water Injection, NOS Diesel Kit, 6" Chrome Exhaust System, No Smoke Valet Switch, McLeod Dual Disc Clutch, Mag-Hytec Rear Cover, Cummins Chrome Kit, Optima Red Tops, Hadley Bully Horns, Hurst Line Loc, Goodyear Wrangler AT/S 305/70/16s. Test mule for Auto Wurks Diesel race program

 

[Archive]

I weighing whether or not to buy the tools from Miller or have it done by a shop that already has the tools. I've called Cummins in Jacksonville and the girl in the service dept. referred me to 2 independent shopd here. One tried to baffle me with BS and the other failed to return my call. Taylor Diesel is obviously in the parts pushing business. He wanted to sell me a bunch on Banks Stuff rather than just do what I asked him to do. Is there anybody in the N. Florida area that's good on these things ?

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1996 2500 4X4 Auto 3. 54 gears...

 

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PSI, I can certainly recommend a shop in the Orlando area! A couple of us are trying to get the FL TDR members together, so the NW and Michigan guys stop having ALL the fun!!
Please check the "local clubs" column for others in your area... maybe they can assist!
Brian

 

[Archive]

"A timing light verifies the timing, while the tool lets you dial in the timing until the mark on the balancer lines up with the mark on the tach pickup. This is done with the engine running. "

DB59
How do you change the timing while the engine is running with a P7100?
Lary

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1972 Chinook class C with 96/215 5spd, 4/5" exh, 4"BD, MagHytec, 85gal fuel, K&N RE0880, AutoMeter, 370's, BD gov kit, BD afc kit, 16cm, 16%btdc, yada-yada-yada
www.fostertruck.com/cummins

[This message has been edited by LarryB (edited 11-28-2000). ]

 

[Archive]

You don't change the timing while the engine is running... ... you get a perfect idea of where you want to move the balancer to when you dial up the timing to where you want it and once you move it, it will be accurate to the . 01 degree

 

[Archive]

There is also the Prefered Bosch/Cummins method, called Spill port timing.

This is where you compare plunger/barrel port closure to piston position via Dial indicator on piston and high pressure pump attatched to your injection pump, watching actual flow through the number 1 plunger/barrel.
When the flow stops you are at the begining of injection.

This is the method we use and is accurate to within one one hundreth of a millimeter.

Ted Jannetty

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Ted Jannetty, Owner President, Jannetty Racing Enterprises, Inc.
97 3500 4x4 club cab 5spd. RED, JRE custom power kit, JRE 4" exhaust
JRE 1/2 inch fuel system, Bosch 300 hp injectors, Prime loc,
Cummins chrome kit, US Gear 20% over drive, 3. 54 posi, Autometer
Ultralite 50lb. boost, and Pyrometer, BD exhaust brake.
Horton fan clutch

99 Ski-Doo 800 Formula III Pipes, reeds, studs and clutching 172 hp
99 Honda Forman 450 ES jet kit, pipe, lift kit, 27" Mud Runners
2001 Ski-Doo MXZ 800 X stock for now 140 hp
2000 TransAm Ram Air WS6 Flowmaster, K&N, Granatelli Mass air meter, LS1 Lid 370 hp
1973 Camaro Rally Sport Street Strip 850+ HP