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RD28T Soot

The document outlines strategies to minimize and eliminate soot issues in the RD28T engine, primarily caused by incomplete combustion. Key recommendations include upgrading the turbocharger, installing a manual boost controller, recalibrating the diesel injection pump, and using high-quality diesel. Regular maintenance and monitoring of exhaust gas temperatures are crucial for achieving balanced combustion and reducing soot buildup.

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11 views2 pages

RD28T Soot

The document outlines strategies to minimize and eliminate soot issues in the RD28T engine, primarily caused by incomplete combustion. Key recommendations include upgrading the turbocharger, installing a manual boost controller, recalibrating the diesel injection pump, and using high-quality diesel. Regular maintenance and monitoring of exhaust gas temperatures are crucial for achieving balanced combustion and reducing soot buildup.

Uploaded by

enoaa86
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Minimizing & Eliminating Soot Issues RD28T

Overview:
Soot buildup in the RD28T engine is a well-documented issue, especially when running
larger turbos, modified fuel pumps, or inefficient intercooling systems. The soot is
primarily a result of incomplete combustion, typically from over-fueling, insufficient air, or
poor atomization of fuel.

1. Upgrade the Turbocharger for More Efficient Air Delivery:


 A bigger, more efficient turbo like the GT2860R or a hybrid version increases
airflow.
 Boost pressure should be carefully balanced with fuel delivery using a manual
boost controller.
 Always interconnect with a good intercooler to keep intake air temperatures low.
2. Install a Manual Boost Controller (MBC):
 Tuning boost levels properly ensures a better air-to-fuel ratio.
 Keep boost within safe limits to avoid piston damage, typically around 12–15 PSI
for stock internals.
3. Recalibrate the Diesel Injection Pump:
 The RD28T’s rotary VE pump can be tuned to deliver more precise fuel quantity.
 Reduce the fuel screw slightly if soot persists.
 Aneroid diaphragm and star wheel adjustments can help shape fueling to come
in with boost.
4. Add an Exhaust Gas Temperature (EGT) Gauge:
 Helps monitor combustion health.
 If EGT is constantly above 700–750°C, you're over-fueling and risking soot +
damage.
5. Use High-Quality Diesel and Fuel Additives:
 Cetane boosters aid in cleaner combustion.
 Fuel system cleaners can reduce injector tip carbon buildup.
6. Clean or Replace Injectors:
 Clogged or worn injectors can lead to poor spray patterns and unburnt fuel.
 New or professionally refurbished injectors can drastically reduce soot.
7. Optimize Timing:
 Advancing injection timing can help burn fuel more completely.
 Always check cold starts and knock after adjustments.
8. Use a Less Restrictive Exhaust:
 A 3" straight pipe helps push exhaust gases and soot out more efficiently.
 Catalytic converters and DPFs on diesel engines increase soot retention (if
installed).
9. Intake and EGR Cleaning:
 Clean intake manifold regularly.
 Disable or remove EGR if not legally required — it feeds exhaust back into intake
and increases soot.
Conclusion:
Soot can be drastically reduced in an RD28T through proper tuning of air and fuel
systems, upgrading supporting components, and regular maintenance. Monitoring EGT
and ensuring balanced combustion are the most important strategies.

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