fiiiiiinally
Thread Starter
Registered User
Joined: Jul 2002
Posts: 458
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From: Post Falls, Idaho
fiiiiiinally
I finally got my Jacobs Exhaust Brake installed by my dealer. They charged me 4 hours labor...$288.00.
Next I want to install my EGT gauge. Since the E Brake has a port for the thermocouple, I thought I'd use it. I know there's been much discussion on post vs. pre turbo temps. There seems to be many opinions on how much difference there is between the post temp and pre turbo temp. I emailed Cummins and asked them what the maximum allowable post turbo EGT is. I'm very anxious to get their reply.
Has anyone with the E Brake had a chance to use it with the cruise control on while descending a grade? How's it work?
Also, did anyone put the Jake Brake emblems on that came with the E Brake? Where did you stick them on? Thanks!
Next I want to install my EGT gauge. Since the E Brake has a port for the thermocouple, I thought I'd use it. I know there's been much discussion on post vs. pre turbo temps. There seems to be many opinions on how much difference there is between the post temp and pre turbo temp. I emailed Cummins and asked them what the maximum allowable post turbo EGT is. I'm very anxious to get their reply.
Has anyone with the E Brake had a chance to use it with the cruise control on while descending a grade? How's it work?
Also, did anyone put the Jake Brake emblems on that came with the E Brake? Where did you stick them on? Thanks!
Thread Starter
Registered User
Joined: Jul 2002
Posts: 458
Likes: 0
From: Post Falls, Idaho
Reply from Cummins
Here's what I asked;
Sir,
I just had the Jacobs Exhaust Brake installed on my truck and plan to install a pyrometer in the provided port. My question is; what is the maximum safe exhaust gas temperature, as taken at this location (post turbo)?
I've reasearched this subject online but get varied opinions. I would feel better hearing it from you guys. I just need to know what maximum exhaust temperature (post turbo) I can run without damaging my engine.
Thanks.
Tim Karwoski
Bakersfield, Ca.
Here's their reply
Summary: Dodge EGT
Solution:
Thanks for your Email message.
Under full load, most Cummins engines produce exhaust temperatures in the cylinder about 1300 degF or so, on the engine dynamometer. In the Dodge Ram application, it is not likely the engine could be ran at 'full load' operation in the chassis but if it could (or if overfueled), the exhaust EGT ahead of the turbocharger should not exceed the 900 to 1100 degF range. The exact temperature will vary on different applications with different pyrometers and the location of the temperature probe.
The pyrometer measures exhaust temperature and the probe is usually mounted about 2 to 6 inches from the turbo outlet (after the turbo) and in that area the exhaust temperature under 'full load' conditions should be in the 700 to 900 degF range. The pyrometer probe could be installed ahead of the turbo for maximum exhaust temperature out of the cylinders (900 to 1100 degF), however, if the probe ever fails, it goes directly into the turbocharger and will likely cause a catastrophic failure of the turbocharger, plus additional engine damage.
Operation and maintenance will determine which expected engine life. Adding too much "heat" without letting the engine breathe or reject it at lower RPM is called "lugging." Engines with standard ratings and operated in "severe duty" applications cannot expect to achieve more than 60% of the durability life-to-overhaul of engines that are run at more modest output levels.
For the best fuel mileage, reliability and durability, Cummins engines should be operated between peak torque and rated speed. Do not lug the engine when running in that RPM range. What is "lugging"? Lugging the engine is when, at cruising speed, the engine is accelerated and it will not increase the vehicle speed. Also, lugging is operating the engine, under full load, below peak torque rpm.
We thank you for your interest in Cummins products. Please let us know if you need assistance in locating the nearest Cummins-authorized Dealer or Distributor Service Provider. For assistance in locating a Service Provider, feel free to use Cummins North America Dealer Locator, which can be found on Cummins website:
http://www.cummins.com/service_locator/index.cfm
Please let us know if you have other questions and if away from your computer or have a time-critical request that needs more urgent attention, feel free to call us toll-free (from North America) at 1-800-DIESELS (343-7357).
Email direct: powermaster@cummins.com
Regards,
--
Powermaster
Customer Assistance Center
Cummins, Inc.
Columbus, Indiana, USA
Free QuickServe Online for Consumers http://quickserve.cummins.com
Details:
Sir,
I just had the Jacobs Exhaust Brake installed on my truck and plan to install a pyrometer in the provided port. My question is; what is the maximum safe exhaust gas temperature, as taken at this location (post turbo)?
I've reasearched this subject online but get varied opinions. I would feel better hearing it from you guys. I just need to know what maximum exhaust temperature (post turbo) I can run without damaging my engine.
Thanks.
Tim Karwoski
Bakersfield, Ca.
Here's their reply
Summary: Dodge EGT
Solution:
Thanks for your Email message.
Under full load, most Cummins engines produce exhaust temperatures in the cylinder about 1300 degF or so, on the engine dynamometer. In the Dodge Ram application, it is not likely the engine could be ran at 'full load' operation in the chassis but if it could (or if overfueled), the exhaust EGT ahead of the turbocharger should not exceed the 900 to 1100 degF range. The exact temperature will vary on different applications with different pyrometers and the location of the temperature probe.
The pyrometer measures exhaust temperature and the probe is usually mounted about 2 to 6 inches from the turbo outlet (after the turbo) and in that area the exhaust temperature under 'full load' conditions should be in the 700 to 900 degF range. The pyrometer probe could be installed ahead of the turbo for maximum exhaust temperature out of the cylinders (900 to 1100 degF), however, if the probe ever fails, it goes directly into the turbocharger and will likely cause a catastrophic failure of the turbocharger, plus additional engine damage.
Operation and maintenance will determine which expected engine life. Adding too much "heat" without letting the engine breathe or reject it at lower RPM is called "lugging." Engines with standard ratings and operated in "severe duty" applications cannot expect to achieve more than 60% of the durability life-to-overhaul of engines that are run at more modest output levels.
For the best fuel mileage, reliability and durability, Cummins engines should be operated between peak torque and rated speed. Do not lug the engine when running in that RPM range. What is "lugging"? Lugging the engine is when, at cruising speed, the engine is accelerated and it will not increase the vehicle speed. Also, lugging is operating the engine, under full load, below peak torque rpm.
We thank you for your interest in Cummins products. Please let us know if you need assistance in locating the nearest Cummins-authorized Dealer or Distributor Service Provider. For assistance in locating a Service Provider, feel free to use Cummins North America Dealer Locator, which can be found on Cummins website:
http://www.cummins.com/service_locator/index.cfm
Please let us know if you have other questions and if away from your computer or have a time-critical request that needs more urgent attention, feel free to call us toll-free (from North America) at 1-800-DIESELS (343-7357).
Email direct: powermaster@cummins.com
Regards,
--
Powermaster
Customer Assistance Center
Cummins, Inc.
Columbus, Indiana, USA
Free QuickServe Online for Consumers http://quickserve.cummins.com
Details:
