Author Topic: asking for heads up on impound measurement(s)  (Read 15949 times)

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Offline Harold Bettes

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asking for heads up on impound measurement(s)
« on: February 08, 2008, 07:11:03 PM »
Hey Experienced Dudes and Dudettes, :-D

In the impound area, how is the stroke of the engine measured? By a long reaching dial indicator or a dial caliper? :?

If they pump the engine instead of mechanically measuring the displacement, how close do they figure that is even with using temperature calculations? :roll:

Inquiring minds just wanted to know. 8-)

Regards to All,
HB2 :-)

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Offline Milwaukee Midget

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Re: asking for heads up on impound measurement(s)
« Reply #1 on: February 08, 2008, 07:33:22 PM »
I guess I'd like to know, too.  The engine I'm building is going to be within a few cc's of the limit for my class.

Where's the cheating line?  If I set a record, will I need to pull the head?

Thanks for bringing this up, Harold.

"Problems are almost always a sign of progress."  Harold Bettes
Well, I guess we're making a LOT of progress . . .  :roll:

Offline Brian Westerdahl

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Re: asking for heads up on impound measurement(s)
« Reply #2 on: February 08, 2008, 07:54:06 PM »
Just don't get into a big hurry to get to impound let things cool down.  It is much easier to take things apart when they are cooled off.   Its like going swimming things shrink when they cool off.  Brian #7796

Offline Nortonist 592

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Re: asking for heads up on impound measurement(s)
« Reply #3 on: February 08, 2008, 09:04:09 PM »
At Bonnville and El Mirage last year my engine was measured with a calipers (graduated C clamp).  At Bonneville they came up with 496cc.  At El Mirage a month later they came up with 494cc.  Maybe it cooled a bit more at ElMirage. 
« Last Edit: February 08, 2008, 10:07:56 PM by Nortonist 592 »
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Offline Dynoroom

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Re: asking for heads up on impound measurement(s)
« Reply #4 on: February 08, 2008, 09:08:38 PM »
Well like most things in the SCTA........ It depends.........

On the car side if/when you make it to inpound they will take some general information from you about your engine. One of the questions will be "whats the displacment?". If you look in the '06 rule book on page 10 1.H it say's if the displacment is not within 3% of the upper OR lower class break the engine can be measured with the SCTA's swept volume checker thru a spark plug hole. Example, let's say you have a small block chevy & you claim 302 ci. Well it's tear down time for you as this is too close to the limit for the air pump. It's up to the competitor to bring any "special" tools that might be needed to measure your engine, say from the bottom or through a spark plug hole.

The scooter guys use fluids, direct measurement, etc.
Michael LeFevers
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Offline sheribuchta

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Re: asking for heads up on impound measurement(s)
« Reply #5 on: February 08, 2008, 09:16:09 PM »
if your bike has the sparkplug in the center of the bore tech has a tool to check bore and stroke if not you pull the head  willie buchta

Offline Jonny Hotnuts

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Re: asking for heads up on impound measurement(s)
« Reply #6 on: February 08, 2008, 11:16:00 PM »
They measured my busa motor with the "expanding caliper" deal. They measured 1299cc....the motor was 1299....doesn’t get closer than that.
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Offline 4-barrel Mike

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Re: asking for heads up on impound measurement(s)
« Reply #7 on: February 09, 2008, 12:48:27 AM »
"NASCAR" style.

Mike
Mike Kelly - PROUD owner of the V4F that powered the #1931 VGC to a 82.803 mph record in 2008!

Offline Milwaukee Midget

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Re: asking for heads up on impound measurement(s)
« Reply #8 on: February 09, 2008, 01:46:16 AM »
"NASCAR" style.

Mike
Oh, I see.  One guy doing the work and three others standing around and watching. :-D 

Reminds me of municipal workers fixing potholes in Milwaukee.

Oh, that was cruel.  It probably doesn't behoove me to pick on the tech inspectors BEFORE I show up with a car.
« Last Edit: February 09, 2008, 02:13:35 AM by Milwaukee Midget »
"Problems are almost always a sign of progress."  Harold Bettes
Well, I guess we're making a LOT of progress . . .  :roll:

Offline wolbrink471

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Re: asking for heads up on impound measurement(s)
« Reply #9 on: February 09, 2008, 09:18:41 AM »
 
Reminds me of municipal workers fixing potholes in Milwaukee.

[/quote]

I am trying to finger out if the guys that 'plug' the potholes with asphalt frosting during the summer are the same ones that are finding them with the front end loaders?

beep beep beep....diesel grrrrrrrerrrrrrrerrrrrr        BANG         the house shakes and the cat flees!

what part of the city are you in Midget? I live on the unfashionable side of the river

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« Last Edit: February 09, 2008, 09:38:25 AM by wolbrink471 »
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ModelTSteve

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Re: asking for heads up on impound measurement(s)
« Reply #10 on: February 09, 2008, 12:48:34 PM »
Show up with a drilled head bolt or some way to "seal the motor" I believe they will some times seal it and let you continue to run and not take your motor apart until later in the meet.

Offline Seldom Seen Slim

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Re: asking for heads up on impound measurement(s)
« Reply #11 on: February 09, 2008, 12:51:09 PM »
Steve, while that might work for the car guys, the bike tech folks advise against it in the strongest terms.  See the note, for instance, taped to the bike tech trailer wall:  "Set a record today?  Get your engine measured today!"

A good reason to follow through on this is because they can't/won't measure a blown-up engine.  If you set a record and have your motor sealed without being measured, then break it later in the event -- no measurement, therefore not even that first record after all.

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Offline JackD

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Re: asking for heads up on impound measurement(s)
« Reply #12 on: February 09, 2008, 02:35:07 PM »
You must be kidding!
Tell me again what happens and why if the engine blows up on a backup run but still has measurable parts the size can't be verified. :roll:
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Offline DahMurf

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Re: asking for heads up on impound measurement(s)
« Reply #13 on: February 09, 2008, 03:40:19 PM »
You must be kidding!
Tell me again what happens and why if the engine blows up on a backup run but still has measurable parts the size can't be verified. :roll:


I'm gonna go with ... cause their measuring caliper thingamabobie might fall into the hole you just blew in the side of your engine.
Or... when they try to fill it with fluid it just keeps leaking out the side!  :-D

Anything else you want to know Jack, just ask!  8-)

 :evil:

Deb
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Offline Milwaukee Midget

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Re: asking for heads up on impound measurement(s)
« Reply #14 on: February 09, 2008, 05:13:25 PM »
You must be kidding!
Tell me again what happens and why if the engine blows up on a backup run but still has measurable parts the size can't be verified. :roll:


I'm gonna go with ... cause their measuring caliper thingamabobie might fall into the hole you just blew in the side of your engine.

Measuring a blown engine is kind of like counting hanging chads.

I think about it in these terms - to verify records, you want to be able to consistently confirm, from one entrant to the other, the exact size of an engine.  The methods are already established.  And while I have no doubt that most of us could come up with a fairly accurate measurement of a blown engine, the established procedure would have to be modified or compromised to allow for a deviation. 

But to modify the procedure for ANY reason, regardless of how noble the intent, would always raise questions as to the fairness of the results.     
"Problems are almost always a sign of progress."  Harold Bettes
Well, I guess we're making a LOT of progress . . .  :roll: