measuring cubic inch October 19, 2009 01:51AM
How do organizations measure cubic inches on Pro-Farm (466 class) or on a Super Farm?
Are there different ways to do this?
Does any organization do checks during the season?? (Ntpa, badger state)

Thanks

Future puller
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Re: measuring cubic inch October 19, 2009 01:13PM
PI thought they could check cubes after a few pulls into the season
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Re: measuring cubic inch October 19, 2009 02:39PM
Did PI pump the 4x4 superstock trucks this year? They never checked our truck, but we missed the first few pulls. We are way short of the limit anyway.

"The Hippie"

Tom
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Re: measuring cubic inch October 20, 2009 01:53AM
Don't you think somebody should be checking this on a regular bases. And how do they check them???
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Re: measuring cubic inch October 20, 2009 10:24AM
Oh, yes, we want to be checking these on a regular basis.
Only ways to check diesel;
1) take a head off and measure bore and stroke
2) take oil pan off and check bore and stroke.
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Re: measuring cubic inch October 20, 2009 02:42PM
just wondering why you have to pull the head or the oil pan wouldn't it just be better to pull an injecter and pump the moter
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Re: measuring cubic inch October 20, 2009 04:38PM
I was wondering the same thing, Why can't they pump a diesel like they do gas engines? I think the rocker arms on the cylinder being checked have to be removed, or made so the valves stay closed in some way.
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Re: measuring cubic inch October 21, 2009 01:25AM
Has to do with compresion ratio I think. (I know, some n/a 4wd's are in the 15 to 1 c/r area)
NTPA made Lustic take a head off, and that is an alcohol engine, so would have spark plug holes,, one thing the pump has adapters for.
How you gonna hold the tester in some injector holes? Make an adapter for each injector style?
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Re: measuring cubic inch October 21, 2009 02:26AM
they pumped the motors in Gordyville the first year in one of the classes.
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Re: measuring cubic inch October 21, 2009 03:28AM
ORVTPA uses a pump to check all their classes every , diesels included
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Re: measuring cubic inch October 21, 2009 04:57AM
How accurate are the pumps? A few cubes?? 10 or 20 cubes?? Never seen one used..
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Re: measuring cubic inch October 21, 2009 05:29AM
Had mine pumped this spring at a pull and measured within less than 1% in error. In fact hit the cubes dead on. Very impressed.
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Re: measuring cubic inch October 21, 2009 05:41AM
close enough, mine was within couple ci
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Re: measuring cubic inch October 21, 2009 08:36AM
Yes.. that is very close.. Thanks guys..
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Re: measuring cubic inch October 21, 2009 12:33PM
where can u get one of these pumps to check cubes?
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Re: measuring cubic inch October 21, 2009 01:58PM
Precision Measurement, San Antonio TX $1000. 670 CI
Speedway Mortors Lincoln Nebraska $1049 670 ci

Had ours for about 7 years, pumps to within a couple ci

Just Google cubic inch tester
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Re: measuring cubic inch October 22, 2009 01:49AM
Is that 670 cubic inches for an 8 cylinder engine, or 670 cubic inches per cylinder?
If it is for V8, wouldn't "we" need the 800 cubic inch tester for the big diesels? (since you are only multiplying the result times 6 instead of 8, the 6 has larger volume cylinders).
What do you do about injector adapters?
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Re: measuring cubic inch October 22, 2009 02:29AM
We use ours for V-8 gas engines.
You take volumn x number of cylinders
Place in TX has one for up to 800 ci $1150
I would imgagine you'ld have to make adaptors for differant injectors. The adaptors we made needed to have a 3/8 hole thru them to retain accuracy lager or smaller will throw it off.
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Re: measuring cubic inch October 26, 2009 04:16AM
can beat pulling the pan and measuring bore and stroke..
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Re: measuring cubic inch October 26, 2009 01:11PM
Pulling the pan rather than pulling the head upon protest was brought up at the orvtpa spring meeting, And low and behold one of the nitrous hot farm pullers jumped up and said oh no we cant do that ,That wont work! Go figure
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