check this out..




FAIL...........

 

Now that is not good. What did the motor have done to it that the oil pump came off of?

 

We honestly dont know exactly what caused it for sure.Were assuming the 6500rpm launch at the track?

 

Huh... interesting. Sub'ing for details..

 

Isn't that what you assumed broke the oil pump in another thread a few weeks back? Was this a regular or a revup pump?

 

Once again Julian, You make me feel better about the extra money on spent on the Nismo pump for my build

Although oil pump failure is rare on our engines, you must be special

-George
GT Motorsports

 

We think perhaps launching on the launch control may have caused some detonation at the line and combined with the negative timing and backfiring may have vibrated the crank shaft enough to break the aluminum pump casing. IMHO most people will not need a $1300 Nismo Oil pump..

 

Wow that is serious. Does the nismo pump have a stronger casing?

 

id like to see some pics of this beast, or some vids, or dyno sheets, something.....


....instead of just seeing the parts that it destroys.


this thing must be wicked.

 

Wow.. Looks like the Nismo competition pump can come in handy on race motors.

 

Your humor always cracks me up.


Poor pump. Didn't stand a chance.

 

Pics of it are on my website as well as some vids of the older set up. There were dyno sheets on the BC cam thread.

 

is this the same pump from the other thread? or is this a second dead oil pump?

 

Congratulations on setting the bar in the oil pump breaking...

 

Julian...Do you think a Harmonic Balancer (damper) would benefit
the 350Z engines as the chain drive and internals have to be affected
somewhat with the RPM range it runs? I ran offshore boats with large
632 cu in and lost high $ valve train parts after 100 hours. With a belt
drive for cam shaft, got an extra 25 hours and with a 8" harmonic balancer
instead of a 7", gained another 45 hours on top of the rest. Bearings looked
alot better with even 1 more inch of Balancer. As far as oil pumps, ran external
so never ran into your problem.
Is the Nismo a thicker casting, more volume or what?

Just would like your opinion.

Thanks

 

The outer case of the Nismo pump is identical. If you put them side by side, you can't even tell the difference between the two. The modifications are all internal.

I too, think that some extreme crankshaft movements caused this pump to crack in half. Nasty.

 

6.5k launch? you kidding me? What..you AWD or something :P

 

I dont think a harmonic balancer would have helped in this situation.The Z motor is internally balanced and the addition harmonic balancer would IMHO no do all that much for us. We are attributing it to the crank actually moving upon releasing and depressing the clutch under such a high load as the launch control where we were building 5psi of boost sitting still

 

+1

The VQ's don't gain much if anything from externaly balanced pulleys. Just my

 

Pumps failing is so rare in ALL motors and in all cases is just massive wear that reduces Pressure/Volumn or in rare situations, Pressure Valve failures.

Unless there is indication on whats left of the gears that something got in there (unlikely) it was as stated, a fluke, possibly aided by a poor cast, and if you know what your looking for, will show up in the wreakage.

Of course the question comes to mind---What came first ? The Chicken or the egg ?.........Did the broken gear shatter the housing or did the cracked housing bust up the gear ?