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BOSS V8 and oil pump gears.... 

 

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 Post subject: BOSS V8 and oil pump gears....
Posted: Thu Jan 28, 2010 2:38 pm 
Stock as a Rock
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Location: sydney
NSW, Australia

hi,

I have a 05 BA XR8 with BOSS 260 motor. The following mods are done. 4.11 diff gears, cams, underdrives, full exhaust and tune. Car is also a 6spd manual. Car revs to 6500rpm and makes 270rwkw.

Now there is a scare campaign about these boss motors and their metal singed oil pump gears failing... Apparently the common causes are underdrives due to harmonics, manuals due to snap changes and diff gears due to quicker revving.. Also the high rev limiters are known to munch the gears...

Is this a scare campaign or do i need to run out and get some billet oil pump gears in before my motor is lunch..

Pros.. Well it cant hurt to have them, piece of mind.

Cons... Fpv rev their gt to 6500 with same oil pump gears and similar power. Costs me $1250 to have them installed..

What do you guys think??

 

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 Post subject: Re: BOSS V8 and oil pump gears....
Posted: Thu Jan 28, 2010 6:15 pm 
ACT Cruise Moderator
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Ride: '06 BF GT-P

Power: 293 rwkw

Location: Canberra
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I've got a similar list of mods, and have the oil pump upgrade. Mine also cops a flogging at track days regularly.

You should've got it done when the under drives were being installed (much less labour involved). If a shop is doing your performance work, they should've recommended the gears long before now.

There has been more than a few example of failures occurring.

For the price of the gears and installation verses the price of a lunched engine. I think it's cheap insurance.

 

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 Post subject: Re: BOSS V8 and oil pump gears....
Posted: Thu Jan 28, 2010 6:30 pm 
Getting Side Ways
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Ride: EA SVO, AU2 Forte

Location: Bendigo
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the way i see it i'd rather 1250 to fit the gears instead of like i dunno 10k for a another Boss motor

 

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 Post subject: Re: BOSS V8 and oil pump gears....
Posted: Thu Jan 28, 2010 7:43 pm 
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NSW, Australia

what about vernier gears??

 

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 Post subject: Re: BOSS V8 and oil pump gears....
Posted: Fri Jan 29, 2010 12:46 am 
Getting Side Ways
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gotta keep an eye on the crank tone wheels when underdrives have been fitted. Ive seen too many that flogg the keyway after underdrives have been fitted.
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 Post subject: Re: BOSS V8 and oil pump gears....
Posted: Fri Jan 29, 2010 12:47 am 
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Just get a GT500 pump from the states...about $90U.S. I did it at the same time I changed the tensioners and fitted underdrives too. Plus I used an ARP crank bolt too. The factory bolt is torque to yield and should really be replaced when you take change the balancer.
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 Post subject: Re: BOSS V8 and oil pump gears....
Posted: Sun Jan 31, 2010 12:19 am 
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what about vernier gears??

 

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 Post subject: Re: BOSS V8 and oil pump gears....
Posted: Mon Feb 22, 2010 7:48 pm 
Getting Side Ways
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VIC, Australia

xr6turnip wrote:
what about vernier gears??

What about them?? They have absolutely nothing to do with oil pump gears...

 

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