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| Home > Help Needed / General Tech Chat > crank sizing, how do you tell? | |||||||
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485 Posts Member #: 149 Senior Member Alberta, Canada |
4th Apr, 2005 at 12:55:21pm
HO fucking HO i think the saying goes. Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe. |
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
4th Apr, 2005 at 12:56:51pm
I bet you set that up specially for this thread!
AlexF |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
4th Apr, 2005 at 12:57:54pm
Ok, so we're bringing out crankshaft pictures are we??
On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
4th Apr, 2005 at 01:00:43pm
I need a regrind...
AlexF |
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485 Posts Member #: 149 Senior Member Alberta, Canada |
4th Apr, 2005 at 01:00:47pm
i thought that Vegard as mines STD/STD... LOL Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe. |
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485 Posts Member #: 149 Senior Member Alberta, Canada |
4th Apr, 2005 at 01:05:25pm
Why grind when you can weld....
Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe. |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
4th Apr, 2005 at 01:16:01pm
The one place to visit before you go:
On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
4th Apr, 2005 at 02:25:48pm
LMAO at all the above!!!
On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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Site Admin  15302 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
4th Apr, 2005 at 04:05:13pm
Ladies.....please......
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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485 Posts Member #: 149 Senior Member Alberta, Canada |
4th Apr, 2005 at 05:57:46pm
The most basic method I can think of would be to use a piece of paper cut to the circumference of you crank journal and then when laid flat and divided by PI should give you the journal diameter.
Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe. |
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162 Posts Member #: 228 Advanced Member |
4th Apr, 2005 at 06:35:04pm
i thought of getting the circumfrence and doin it that way, didnt know if it would be accurate enough, will give it a go 2moz
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 2521 Posts Member #: 417 Post Whore Swindon |
4th Apr, 2005 at 07:06:39pm
A diggy vernier only cost about ?15 should be accurate enougth to determine whether it's -.010/.020" or whatever.also usefull for measuring other stuff pipe sizes/valve sizes etc
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
4th Apr, 2005 at 08:14:30pm
And it measures both imperial and metric!
On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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Site Admin  8506 Posts Member #: 16 Sold the turbo and seeing what the C20XE can do! Near Lincoln |
4th Apr, 2005 at 09:11:44pm
cant you get somewhere to measure it? or a mate to pop round. if you were close enough id do it. |
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
4th Apr, 2005 at 09:20:35pm
Where are you... no location in your profile...
AlexF |
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162 Posts Member #: 228 Advanced Member |
6th Apr, 2005 at 08:03:28pm
managed it! cheers for the help, its +10, which also backs up what the previous owner thought (he couldnt be sure)
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
6th Apr, 2005 at 10:07:26pm
AlexF |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
7th Apr, 2005 at 07:51:18am
The problem with this paper method is that you don't measure if its conical/oval in any way. When I measure my crankshafts, I measure the jouornals in four places to be sure that it's not oval/conical.
On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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485 Posts Member #: 149 Senior Member Alberta, Canada |
7th Apr, 2005 at 12:41:02pm
Out of curiosity how many have you found that are Oval ?? because I haven?t found one yet give or take 0.0005" from the cranks i've ran. Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe. |
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
7th Apr, 2005 at 12:45:45pm
Me nither...
AlexF |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
7th Apr, 2005 at 02:15:12pm
Big end journals are always conical due to the silly A-series offset rods, and the centre main is always oval. When using the crappy A+ big main bearings, you won't notice, but look at an A centra mian journal, and you'll see that it's worn only on one side. On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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2521 Posts Member #: 417 Post Whore Swindon |
7th Apr, 2005 at 02:58:18pm
Round things can go slightly triangular too which you can't measure with a mic as you pick up on the high spot one side and low spot opposite,Check with a clock and 90 degree v block 8-)
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