Yes they have been tested... They have been physically tested and torture tested for 5hours straight. All gears come with documentation. Oem gears have broken on multiple cars even Zeliminator has broken them as stated in his post after running 8200rpm

Think Megan370 broke his too. :( When I was talking to RJM at ZDayZ. He had a set there, and the OEM's too. You could see the difference between the 2 sets.

Something to do with the two contacts points, rjm being reinforced and thicker

What you end up with on the stock units is a 1mm contact point that gets really hot and the gears can micro weld to themselves to the crank. So as the car is ran really high and hard you get these micro welds once the car is turned off and everything cools down. Then when you go to push the clutch in to start the car it shatters... This is how it happens everytime. The tensile strength of the oem Sintered gears is about 6,000 psi and the new billet Chromoly steel is over 140,000 and it's a harder material which will be stronger and more resistant to micro welding.

That

He is only running 8,300 rpm on a stock crank with bmw m5 con rod bolts. Bottom end is oem besides those con bolts.

I guess he dropped it back down since I last rode in the car... It was retarded either way! The gears felt like they never ended... EVER!!!:driving:

The other issue with the oil pump is the backing plate. Are they going to address that as well? Also curious about the bench test, were these placed in an engine and ran or just spun with an bench top motor?

Hi Everybody,

I would like to thank Mike aka "Bullitt5897" for stepping in and helping us get this new product launch started. After several conversations we have decided to bring Mike aka "Bullitt5897" into the team to help assist the community through sales and technical support. Going forward the RJ MFG account will be taking over this thread and presenting new and future product announcements. Mike aka "Bullitt5897" will not be taking questions on his personal account but will be piloting our vendor account here on the forums. So please direct all your questions to our account going forward.

Thank You,

The RJ MFG Team.

What have you seen as an issue with the backing plate? We are still awaiting the files from the bench test results. As soon as those files are available we will put together a view for the community. AS far as the bench test methodology. We used a third party testing facility that specializes in testing these parts this is not an inexpensive process but given that this is such a crucial part that our motors rely on we wanted to ensure that the parts we would be using would support well beyond the goals of the community. Please note that these gears were installed into a factory oil pump and the bench test simulates real world environment that the oil pump will go through. All of the shock, heat and rpms you can throw at this oil pump was done and even past the extremes of application. Rest assured that this is a product that will live up to its advertisement. :tup:

The stock backing plates have been known to flex and/or break at sustained RPM's above 8000 RPM due to vibration. This along with the gears is why most of the teams went dry sump.

Third party bench testing is good. Did they heat cycle and thermal shock it while they tested? Not saying you have a bad product but my car runs in anywhere from 0 F to 120 F temps. OE tests for all of those conditions and given it's the heart of the engine I like to know the metallurgy has been tested similar to OE testing.

These are questions I've asked other manufacturers of oil pump gears as well. I would absolutely love to be able to not dry sump my car but I don't want to lose an expensive engine to an oil pump either.

I talked to Bobby at Zdayz for a bit about this and my application but sadly I had to leave before we could get more in depth.

Hey Guys this is Mike. I want to be up front and say that I had my numbers off. I have corrected my numbers to reflect the true numbers. After an in depth discussion with the engineer for RJ MFG I found out that the OEM gears are Sintered metal gears with an approximate tensile strength of 6,000 psi. The new gears are made from a specialized chromoly steel designed specifically for applications such as this. The minimum tensile strength of the new gears are 140,000+ psi. This is 23x's stronger than stock gears and the new gears have been specially heat treated to reduce the chance of micro welding.

Thanks for the update on the backing plate. As of right now the plan is to go with gears only. I have talked with several people in the industry over the last several months including Jim and Clark at JWT and the backing plate was never brought up as an issue. lol If you have ever talked with Jim or Clark at JWT you might as well get out a pen and pad because you will be on the phone for an hour long seminar... Those guys know there stuff! We will have an eye on this as my car will have one of the first units pushing really high rpms. If there becomes an issue we will address it. However, through our testing so far we have not seen this as a weak point yet. Just like many are surprised that my car is still running stock trans gears at over 1100hp at the crank yet GTRs have to have theirs replaced at this level. We want to be smart about replacing parts if there isnt a need we dont want to charge the customer for it.

Thanks,

Mike

+1 for comment on JWT ...... Clark in particular has forgotten more about these engines than most of us learn in a lifetime..

Sounds very interesting. I'm still running a stock car with bolts on.. Stock pump should do. I'll check on the post to see what everyone would say about this product.. Might need it in the future for the TT setup.