Stock oil pump=FAIL
Stock oil pump=FAIL
10-28-2007, 10:44 AM
#3
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Originally Posted by G87z
Now that is not good. What did the motor have done to it that the oil pump came off of?
10-28-2007, 11:00 AM
#5
Originally Posted by MRC Motorsports
We honestly dont know exactly what caused it for sure.Were assuming the 6500rpm launch at the track?
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?
10-28-2007, 12:45 PM
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Originally Posted by George@GTM
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
Although oil pump failure is rare on our engines, you must be special
-George
GT Motorsports
Last edited by Julian@MRC; 10-28-2007 at 12:47 PM.
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10-28-2007, 03:08 PM
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Originally Posted by tig488
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.
....instead of just seeing the parts that it destroys.
this thing must be wicked.
10-29-2007, 11:56 AM
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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 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
10-29-2007, 01:02 PM
#16
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.
I too, think that some extreme crankshaft movements caused this pump to crack in half. Nasty.
10-29-2007, 09:45 PM
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Originally Posted by 06Track
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 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
10-30-2007, 03:01 AM
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Originally Posted by MRC Motorsports
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...
The VQ's don't gain much if anything from externaly balanced pulleys. Just my
10-30-2007, 03:16 AM
#20
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 ?
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 ?