GoodCRD wrote:
Google detroit diesel 50 series engine "not 60 series" and you will find it to be an inline 4. I know because I have worked on them and did some design work for the SEPTA application used in the NABI buses. Both use the garrett vnt turbo and a water cooled egr valve. The injection system was not the Common Rail design which is in your liberty. For the 50 series a DDEC electronic injector and management system was used. The CRD system used in our VM engines is made by Bosch and the same design is now used on the Cummins inline 6 cylinder engines that have been replacing the detroits in the bus fleets. Nothing wrong with the detroits but they costs about $21k to overhall while a new cummins can be gotten for about $18k with a new warranty. Get an engine manual on the 50 series and you will understand my post.
And when did I ever state the VM was an exact reduced in size copy of a 50 series DD engine or that the liberty CRD was running without a flywheel? Smaller version does not mean mini copy. And low mass flywheel does not mean "No Flywheel"! The 50 series uses a single overhead cam which makes it taller. Our VM engine is shortened in hight by using a dual over head cam. They both use counter balancing shaft assemblies to smooth out the "power pulses" or "firing resonance" whatever term you want to use! Plus I never compared 6 cylinder to 4 cylinder engines. Do you have a stake in Suncoast! I just stated I'm not impressed with the Suncoast converter. I trust the P.E. Engineers I have worked with before I would trust a vender trying to sell me a product. Just look at the overall designs of these two engines and you will see what I am trying to show.
Two things our VM engines don't have in common with DD are.
One, DD engines burn more than their share of engine oil compared to Cat or Cummins, an old DD problem.
A brochure of a VM engine does not leak oil.
I can point out that PEs are only human and in my line of work I have to diplomatically explain to them the Laws of Physics and how they apply to the application. The smart ones listen and the pig heads don't.
Do you have any documentation to show that Suncoast and other performance companies do not consult PEs who know what they are doing? Suncoast has a lot customers and companies who are or have very competent engineers (some with a PE) who have Suncoast develop transmission components. PE does not mean anything if the individual does not have the art to do the fine tuning and development in their being. Those of us that know the difference between good Engineering and Bean Counter Engineering reject Bean Counter Engineering such as light flywheel mass and cheap Bean Counter Engineering moves like Dual Mass Flywheels and light mass torque converters that only cut costs along with performance. Those of us who have extensive experience with proper rebuilding or re-manufacturing, reject the virgin only attitude on components, it is the quality that counts. How many race car engines are virgins? Very very few, most racers want an engine that has been stress relieved by being used, not some block that was bored out when the cast iron cooled down enough so the cutting fluid does not catch on fire. Of course with your vast office of PEs, you could ave them investigate and specify cryogenic stress relieving so you could have your virgin race car engine that will compete with the seasoned blue printed engines most racers use. If you wanted a virgin Suncoast converter, I am sure they could round up all the parts from Sonnax and build one, but all you want is virgin OEM Mopar stock and are trying to justify it and slam any other options.
Are you going to condemn all of the racing development that came from Shine Runners who later became NASCAR drivers and pit crews, just because not all of them had PE after their name?
Are you going to condemn MicroSoft because Bill Gates did not have a PE when he coordinated the putting together of DOS used on early PCs?
HAVE A NICE DAY
