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.

Coldfire this is a great reliability mod. You should jump in on it.

2 new orders!

First 10!
1. Bullitt5897
2. Zeliminator
3. Juicinjake
4. Juicinjake - 2
5.
6.
7.
8.
9.
10.

All new order information has now been setup in the Vendor for sale section! We will have the first production batch in two weeks!!! Its looking as though the first ten maybe spoken for!!! Get on the list while you still can! Save some money!

PM me for any orders.

Mike

I will need mine in a few weeks as they have started my engine build
Thanks

Z

You will have one of the first production units. Call or PM me and we can setup your order. I should have the first 20 in the next week.

Mike

Another forum order!

First 10!
1. Bullitt5897
2. Zeliminator
3. Juicinjake
4. Juicinjake - 2
5. Hotrodz
6.
7.
8.
9.
10.

Will this work for the G 37 as well??

Works on all VQ HR and VHR motors. So to answer your question your g37 can use this as a direct oem swap. ;)

I would be in on this but I will be out of commission for several weeks.

Ok Guys! Big Update! We will have production units in house next week and all orders will go out on the 24th! We will have an initial inventory of 20 units and half of those are pretty much spoken for... so get on the list! We are also now taking payments for these as well.

Will this be a regularly stocked item after the initial group buy?

Yes it will and this initial buying group will determine our inventory levels based on demand.

First 10!
1. Bullitt5897
2. Zeliminator
3. Juicinjake
4. Juicinjake - 2
5. Hotrodz
6. Local Customer
7. Local Customer
8. TT_Nismo
9.
10.

Love to go on the list, but can't do anything until the middle of next month. :shakes head:

I'm in! My build is finishing up soon and I'd like to do anything I can to prevent another engine failure!

First 10!
1. Bullitt5897
2. Zeliminator
3. Juicinjake
4. Juicinjake - 2
5. Hotrodz
6. Local Customer
7. Local Customer
8. TT_Nismo
9. Ban25
10.

Yes, it will. In fact it will fit all HR/VHR engines

Please visit the link below to secure your order
Thanks for your business
https://www.paypal.com/cgi-bin/websc...=TQ7KD36Q2HGYQ

Hey guys if your on list please click on the link and secure your order.
Thanks

we need one more guy to be number be number 10. Number 10 will get a free shirt

Count me in

Any update on these?

Happy 4th!

We had a slight delay on the manufacturing side. We should have these in this week my apologies for the late reply.

-mike

Specifically it is the certification process that is taking longer than expected. We will have 5 units go out this friday.

the rest will be the following week. Again our apologies for the delay. We want to make sure these gears are fully blueprinted and certified before you get them.

-mike

I can wait a few more days

Z

Why rev so high? We lose power after 7-7.5k anyways. I run 7.8k and its fine. I couldn't see staying in the same gear only to lose more and more. Turbo guys might benefit if the turbos large enough to supply the air but I've tuned smaller turbos and its the same issue. Close to OEM redline it just runs out of breath and starts to die.

When you plan on ported the heads and installing bigger cams, need revs to make power.

As stated earlier this is a reliability mod with the option to turn things up. As always there will be supporting mods that will make the benefits more pronounced. We have a turbo car in the shop now that has these installed and we will be doing back to back pulls at different red line targets to get a comparison for everyone.

Synolimit your statement is a blanket statement and does not apply to all builds, setups or customers cars. In your case with your setup you may lose power but that does not mean that all people will lose power. Even if power remains the same or slightly lower at higher rpms if there is not a dramatic drop off in power the power remains useful and can change the powerband range of the car. Given the customers application this can be very beneficial.

Again each car is different and we have seen car with basic bolt ons make any where from 304whp to 338whp on the same dyno and on the same day. Building cars as you should already know is about the cohesion of symbiotic parts. Certain combinations work better than others. There is a reason that the GT cars ran these types of gears over the stock and nismo units.

If you dont agree with the mod sit back and watch the results. we just pulled a car with 6k miles on the clock and the stock gears had signs of early wear and tear. We upgraded the customers gears and we will have several others installed in the next month. :tiphat:

When people ask us why do I need this mod? Well this was out of a stock motor!

The unit above was pieces back together after it blew up in a customer's car:

Attached is what the pieces looked like.

And finally here is our unit replacing a stock unit! You will notice some slight differences in gear to gear design. These differences improve durability, performance and reliability in the gears themselves.

If the gears were such an issue why isn't there any kind of tsb's from Nissan?

Probably for the same reason there has never been one for the fuel pump, CSC, or engine temperature. This is a one of the car's glass jaws that becomes apparent when the car is driven to the limit. If you stay under the stock redline, there should be no issues.

One way to see where the reliability issues are in the VQ37 is to compare it with the VR38. As I understand it, the crankshaft can deflect at high RPMs and the crank-driven pump is vulnerable to the harmonics generated at those RPMs. The VR38 uses a chain-driven pump to prevent this issue.

NISMO makes an uprated pump, but it doesn't solve the root problem, and is only reliable for a few runs past 7800 RPM. During the Z33 era, the Z was Nissan's flagship racing platform and NISMO developed lots of race-hardened parts not just for their own efforts, but for customers as well. These days, the R35 is the motorsports platform and it's up to the aftermarket to support the Z34.

I'm going back and fourth between this and the nismo pump. I can't afford dailys dry sump just yet. I can't wait for someone to test these gears out in real world conditions

Cosmo as with any car manufacturer tsb are not always put out with every defect... To make the statement that because there is no tsb then there is not a problem is short sighted and lacks the understanding of what is really going on in the oil pump housing...

What causes these to break are micro welds developed between the oil pump gears and the crank shaft. This becomes apparent more and more over time and is not caused by over revving the motor. We have several customers who have shattered their oil pump gears with factory rev limits. With that said the above failure was within factory specs. Also with corresponding mods the motor does not run out of steam over 7500rpms this is very evident in builds such as 1slow370 where he revs to 8300rpm on the daily.

So please unless you have factual information to add to the conversation or are willing to be constructive to the conversation I would ask you respect our moderators wishes and our threads. We do not want the unfounded negativity you have brought us and others in the past in our threads.

Thank you