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Math Challenge
01-29-2008, 11:20 PM
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Math Challenge
Alright so are some of you know I have been working on a turbine housing issue. And well after finding that a 53mm turbine housing didnt fit on my 53mm turbine i was confused (it didnt fit over the turbine)
So i went through the possible combos and sure enough there is a 53.8 turbine wheel. So i crab my trusty (harbor freight) caliper and go at it. Sure enough its odd bladed so i cant measure directly. So I measure across two blades to a third blade (imagine a peace sign). Get 2.066in, 2.065in, and 2.065in.
I run the calcs and get a turbine wheel that is 54mm.
So is my harbor freight caliper right and were i have a custom turbine wheel that has no record of existing in any other turbo or is my caliper off
by
0.371747212%
Lets here your opinions, and if anyone wants to double check my math i would appreciate it.
Use 2.065in and 9 blades (so 40deg apart)
So i went through the possible combos and sure enough there is a 53.8 turbine wheel. So i crab my trusty (harbor freight) caliper and go at it. Sure enough its odd bladed so i cant measure directly. So I measure across two blades to a third blade (imagine a peace sign). Get 2.066in, 2.065in, and 2.065in.
I run the calcs and get a turbine wheel that is 54mm.
So is my harbor freight caliper right and were i have a custom turbine wheel that has no record of existing in any other turbo or is my caliper off
by
0.371747212%
Lets here your opinions, and if anyone wants to double check my math i would appreciate it.
Use 2.065in and 9 blades (so 40deg apart)
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01-30-2008, 12:22 AM
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I get 54.081 mm as the diameter of the turbine blade based on your 2.065 in measurement and a 9 blade turbine (40 degs between blades). That is about +0.003" from 54mm which is in the realm of measurement error (from your calipers). At 2.066 I get +0.004" from 54mm.
I would sketch it out but I am already up past my bed time
I would sketch it out but I am already up past my bed time
Last edited by ZX-Tex; 01-30-2008 at 12:41 AM.
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01-30-2008, 09:36 AM
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I get 54.081 mm as the diameter of the turbine blade based on your 2.065 in measurement and a 9 blade turbine (40 degs between blades). That is about +0.003" from 54mm which is in the realm of measurement error (from your calipers). At 2.066 I get +0.004" from 54mm.
I would sketch it out but I am already up past my bed time
I would sketch it out but I am already up past my bed time
Sam, when you have odd even tooth/blade objects you can not measure directly the diameter because opposing each tooth would be a valley. So knowing the amount of blades (9) and the configuration (a circle 360 deg) you can measure from two blades across to one.
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