The weak link in the 455 engine when it is putting out lots of Horse power
is the main bearings, they need lots of oil. However if you put in a high
volume pump,most of the oil is pumped to the valve train for the hydraulic
lifters. therefore the hot rodders designed oil restrictors to go in the
main block in the oil gallies under the main bearing shells. these
restrictors limit the amount of oil to the top of the engine and ensure lots
of oil to the main and cam bearings.
Now Mondello has started a new way of preping the cast cranks to further
stop the problem of galling or spinning the bearings between the 3-4 main.
He cryogenically freezes the crank in a complicated freeze thaw cycle that
virtually stops crank flexing under power. He says that this process makes
for a really fantastic living engine.
>------------------------------
>
>Something bothers me about this deal of putting restrictors in the oil
gallies and thin spending the hard earned bucks on a bigger oil pump.
>Can any one explain this to me??
>Date: Sun, 13 Dec 1998 23:23:12 EST
>From: RickStapls
>Subject: Re: GMC: Zak In defense of the GMC motorhome parts houses
>
>
>> I am glad that these dealers are available to us. What other 20 year
>> motorhome is fully supportable? I will gladly pay a little higher price for
>> parts just to keep them there.
>
>Zak,
> I'll second that motion, brother. I do shop around, esp. on big-ticket
>items, and I'd have to hit the lottery to buy one of Joe Mondello's engines.
>But when I have to have the right part (esp. critical parts like steering
>shaft, front wheel bearings, etc) I don't begrudge the specialty supplier his
>(substantial and well-deserved) profit. When it comes time for a new engine
>I'll build it myself, but I'll call up Joe M. for his oil restrictors, exhaust
>crossover plugs, and maybe an oversize oil pump, and smile as I write him the
>check for his expertise.
>
>Rick Staples
>'75 Eleganza
>Louisville, CO
>
>
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
is the main bearings, they need lots of oil. However if you put in a high
volume pump,most of the oil is pumped to the valve train for the hydraulic
lifters. therefore the hot rodders designed oil restrictors to go in the
main block in the oil gallies under the main bearing shells. these
restrictors limit the amount of oil to the top of the engine and ensure lots
of oil to the main and cam bearings.
Now Mondello has started a new way of preping the cast cranks to further
stop the problem of galling or spinning the bearings between the 3-4 main.
He cryogenically freezes the crank in a complicated freeze thaw cycle that
virtually stops crank flexing under power. He says that this process makes
for a really fantastic living engine.
>------------------------------
>
>Something bothers me about this deal of putting restrictors in the oil
gallies and thin spending the hard earned bucks on a bigger oil pump.
>Can any one explain this to me??
>Date: Sun, 13 Dec 1998 23:23:12 EST
>From: RickStapls
>Subject: Re: GMC: Zak In defense of the GMC motorhome parts houses
>
>
>> I am glad that these dealers are available to us. What other 20 year
>> motorhome is fully supportable? I will gladly pay a little higher price for
>> parts just to keep them there.
>
>Zak,
> I'll second that motion, brother. I do shop around, esp. on big-ticket
>items, and I'd have to hit the lottery to buy one of Joe Mondello's engines.
>But when I have to have the right part (esp. critical parts like steering
>shaft, front wheel bearings, etc) I don't begrudge the specialty supplier his
>(substantial and well-deserved) profit. When it comes time for a new engine
>I'll build it myself, but I'll call up Joe M. for his oil restrictors, exhaust
>crossover plugs, and maybe an oversize oil pump, and smile as I write him the
>check for his expertise.
>
>Rick Staples
>'75 Eleganza
>Louisville, CO
>
>
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
