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Doctor Dodge
PostPosted: Sun Jan 07, 2007 10:55 pm 
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In case you were wondering...
A 1 inch thick "high volume" oil pump impeller assembly will stick out of a factory diecast aluminum (5/8 impeller) housing by .295 of an inch.
DD
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Last edited by Doctor Dodge on Mon Jan 08, 2007 9:16 pm, edited 1 time in total.

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wicked/six
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PostPosted: Sun Jan 07, 2007 11:36 pm 
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That sounds about right if i had my micrometer and the parts i could give you exact #'s :!:

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wicked/six
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PostPosted: Sun Jan 07, 2007 11:49 pm 
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Pulled my stock pump vain and it measures .655 soooo...

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Doc
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PostPosted: Mon Jan 08, 2007 8:51 am 
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I was expecting to see a .375 difference but it is not measuring out that way. Looks like the factory pump's "5/8 thick" impeller is really closer to .680 thickness.
DD
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slantzilla
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PostPosted: Mon Jan 08, 2007 1:37 pm 
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Wintertime boredom setting in already Doug? :twisted:

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Ron Parker
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PostPosted: Mon Jan 08, 2007 4:04 pm 
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Hey Bagel he is a Valley Boy go easy. Your Racing Friend Possum. :D












2007 Yall Hold My Beer And Watch This
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Greg Ondayko
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PostPosted: Mon Jan 08, 2007 6:10 pm 
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They dont have winter in sunny California - They just have to race under the lights more in Oct - March!

Greg

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Doctor Dodge
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PostPosted: Mon Jan 08, 2007 9:24 pm 
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Wintertime boredom setting in already Doug? :twisted:
I was wondering if anyone would say: "why the hell do you measure that?"
Answer: so I know how thick the spacer needs to be. :roll: :wink:

Have you ever weighed a high volume oil pump, they only made them in cast iron and they weigh A LOT.
DD
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slantzilla
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PostPosted: Tue Jan 09, 2007 7:53 am 
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Have you ever weighed a high volume oil pump, they only made them in cast iron and they weigh A LOT.
DD
Yes I have. I just had the place that cast my new head make one from aluminum while they were at it.

You ready for Vegas? :shock:

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Doc
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PostPosted: Tue Jan 09, 2007 8:11 am 
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Vegas... You bet I am ready!
Well... I do need to fill the bottles and buy some fresh fuel. :twisted:
DD
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440_Magnum
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PostPosted: Tue Jan 09, 2007 10:05 am 
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Mild topic drift here.

I've read about the slant-6 oil pump drive gear being a bit fragile and having trouble with HV oil pumps. So do many (any?) folks run a NASCAR-style belt-driven oil pump on racing slants? Seems like that might solve both the fragility and weight problems.

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slantzilla
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PostPosted: Tue Jan 09, 2007 12:05 pm 
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There have been a few to try them. :shock:

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sick6
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PostPosted: Tue Jan 09, 2007 12:12 pm 
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is the high volume pump the same as a higher pressure pump?

whenever I used to mention using the heftier spring that mopar sells I was always shouted down. people said the pressure was too much.

........that was back in my .com days, soooooo long ago...
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Doc
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PostPosted: Tue Jan 09, 2007 12:57 pm 
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High pressure is not the same as high volume.
Pressure should be regulated to 45-55 psi and a stock regulator spring will give you that. A stiffer spring will produce more pressure at high RPMs but also puts more load on the drive gear

In some cases you need increased oil volume, like when you have extra oil demands from loose bearing clearances, feeding a turbo or an Accu-sump. (oil accumulator)
A high volume pump, with it's bigger impeller can get the pressure to 45-55 psi faster and keep it there at much lower RPMs, even when the engine is hot and the oil is thin.
DD
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sandy in BC
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PostPosted: Tue Jan 09, 2007 4:10 pm 
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So....? You just hack saw 3/4"~ off the end of a high volume pump ,,,,,then machine it flat to .300"~....(draw file would be fine)....

You do know a Supra electric pump bolts right on???? :roll: :wink:

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