RJ MFG New Oil Pump Gears (Rev to 9k!!!)

ban25

Any update on these?

Happy 4th!

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2017 Corvette Z06 7MT | 1LE | Stage 3 | DSCSport

RJ MFG

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

-mike

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RJ MFG

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

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Z eliminator

I can wait a few more days

Z

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12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

synolimit

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.

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13 370z-

RJ MFG

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.

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Elmo370z

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

RJ MFG

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

Attached Images

image.jpeg (108.0 KB, 29 views)

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RJ MFG

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

Attached is what the pieces looked like.

Attached Images

image.jpeg (125.4 KB, 15 views)

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RJ MFG

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.

Attached Images

image.jpeg (87.4 KB, 89 views)

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COSMO

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

ban25

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.

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Elmo370z

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

RJ MFG

Elmo,

You won't have to wait long we have a customer car which just had this installed last week. And we are waiting on a new main harness before we put it on the dyno.

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RJ MFG

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

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