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Kirkham Motorsports

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  #41 (permalink)  
Old 04-07-2018, 12:49 PM
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Quote:
Originally Posted by patrickt View Post
Well obviously the only way I get you nay-sayers to STFU is to post video. So here it is: https://youtu.be/CmkGZXKI3PA and I'll start using personal protective devices next time.


i was waiting for the info-mercial on it.....
if it would have grenaded, and bounced off your forehead, would you have still posted the video?
maybe with a mullet wig on, saying hold my beer, watch this?

BTW, i hear your compressor, there is no way it can feed an impact gun that puts out any sort of real torque, if it was, it would have spun that baby in a second, not the long period to break it loose.
sounds like a smaller single stage head that can put out 125 psi max but not alot of volume
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  #42 (permalink)  
Old 04-07-2018, 01:19 PM
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Pat,
When are you installing the cruise control?
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  #43 (permalink)  
Old 04-07-2018, 01:30 PM
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Originally Posted by rodneym View Post
Pat,
When are you installing the cruise control?
Naaah, you know I'm old school. But, do you know what the typical ERA/KMS/CSX torque value is on a well-smacked spinner? There have been a couple of threads on that, including the gt40 forums, and some not-dense guys have opined on it as well, but I'll just throw that out to see if the peanut gallery has any thoughts on it....

Last edited by patrickt; 04-07-2018 at 02:36 PM.. Reason: Uhh, maybe 400-600 ft/lbs? http://www.gt40s.com/forum/gt40-tech-chassis-brakes-tires-wheels/46933-spinner-torque-value.html
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  #44 (permalink)  
Old 04-07-2018, 05:17 PM
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I get a lower number. Just estimating things here but came up with the following:

6 lb lead hammer = 2.72 kg
Moving at 11 m/s (about 25 mph)
Decel time hitting spinner = 0.01 sec (10 msec). Just a guess here
Decel therefore equals 1100 m/second squared
Force = just under 3000 Newton’s = 674 lbF
Spinner radius of about 6 inches means a torque of 335 lb-ft

Mike.
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  #45 (permalink)  
Old 04-07-2018, 05:37 PM
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The reason I crafted this little gizmo was really pretty simple. I picked up a new set of brake pads over the Christmas holidays and it took me a good 20 minutes to get the damn front spinners off. Only three minutes to pull the cotter pins out of my calipers and replace the pads, but then I had to whack the spinners back on. My elbow hurt for three days. That's when Ellie, my dog, suggested crafting that tool. My dog is a genius. Fred and Red just don't want to admit that they really want one too, but that's ok -- we still love them.

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  #46 (permalink)  
Old 04-07-2018, 05:38 PM
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https://youtu.be/X8kCWG3d1Cc

Watch and learn.............
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  #47 (permalink)  
Old 04-07-2018, 05:45 PM
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Quote:
Originally Posted by Mark IV View Post
https://youtu.be/X8kCWG3d1Cc

Watch and learn.............
Yeah, but that's crappy SPF stuff.
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  #48 (permalink)  
Old 04-08-2018, 07:56 AM
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I know the factory engineering torque spec for Corvette KO wheel is 450 ft-lbs. But I think their threaded hub may be a bit larger diameter than the Cobra - haven't compared. Has anyone ever found an old Halibrand torque spec or a torque spec from one of the current Cobra KO wheel manufactures?
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  #49 (permalink)  
Old 04-08-2018, 08:08 AM
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Quote:
Originally Posted by DanEC View Post
I know the factory engineering torque spec for Corvette KO wheel is 450 ft-lbs. But I think their threaded hub may be a bit larger diameter than the Cobra - haven't compared. Has anyone ever found an old Halibrand torque spec or a torque spec from one of the current Cobra KO wheel manufactures?
We have enough mechanical and structural engineers on here that we should be able to get an answer on that. And on what the safe load is on an aluminum T6 hex bar that is one and one half inches across the flats. So far it's barely even scratched, much less showing any twisting.
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  #50 (permalink)  
Old 04-08-2018, 09:52 AM
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Patrick

We use a 2.75” socket on our SS nuts ....torqued to 450# lbs. of torque to put them on......

And if we remove them with the torque wrench .....it takes over 600# of torque to take them off.....with the 3/4” impact and a 1/2” hose it knocks them right off....

Yes we use the impact to put them on as well.....

BTW......the 2.75” Socket is standard size for the Center-lock wheels used in TransAm and IMSA....
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Last edited by Morris; 04-08-2018 at 09:55 AM..
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  #51 (permalink)  
Old 04-08-2018, 10:16 AM
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Quote:
Originally Posted by Morris View Post
Patrick

We use a 2.75” socket on our SS nuts ....torqued to 450# lbs. of torque to put them on......

And if we remove them with the torque wrench .....it takes over 600# of torque to take them off.....with the 3/4” impact and a 1/2” hose it knocks them right off....

Yes we use the impact to put them on as well.....

BTW......the 2.75” Socket is standard size for the Center-lock wheels used in TransAm and IMSA....
Hi Morris,

Where did you get the SS nuts? I would like to get a set.

Thanks,

SB
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  #52 (permalink)  
Old 04-08-2018, 10:22 AM
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Quote:
Originally Posted by Morris View Post
Patrick

We use a 2.75” socket on our SS nuts ....torqued to 450# lbs. of torque to put them on......

And if we remove them with the torque wrench .....it takes over 600# of torque to take them off.....with the 3/4” impact and a 1/2” hose it knocks them right off....

Yes we use the impact to put them on as well.....

BTW......the 2.75” Socket is standard size for the Center-lock wheels used in TransAm and IMSA....
I like a definitive and authoritative answer. Thanks.
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  #53 (permalink)  
Old 04-08-2018, 02:52 PM
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Here’s a photo of the Stainless Steel knock-off nuts....because when you are changing tires & wheels at the track this is the only way to go.....plus you can turn the regulator up on the nitrogen to get more power if they get tight.




Here’s the tools.....one socket is for the race Center-locks & the other socket is for the tie down center-locks

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Last edited by Morris; 04-08-2018 at 02:54 PM..
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  #54 (permalink)  
Old 04-08-2018, 02:55 PM
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Nice stuff. Any educated guess on what it would take to twist that 1 1/2" hex bar of T6 aluminum?
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  #55 (permalink)  
Old 04-08-2018, 03:08 PM
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Here’s a photo of the SS center-locks with the tie-down locks and the race locks



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  #56 (permalink)  
Old 04-08-2018, 03:26 PM
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Quote:
Originally Posted by patrickt View Post
Nice stuff. Any educated guess on what it would take to twist that 1 1/2" hex bar of T6 aluminum?
I have the same spinner removal tool you have ...and can tell you on my brothers Cobra.....we put a 1” x .125” wall thickness bar that was 7’ long and stood on it to break loose the spinner and the hole where the bar inserted into the tool was not elongated. I know the shock of the impact has an effect on the tool. But your impact did not sound like it was hammering like it could and that is because you are feeding it with a 3/8” air line.....therefore you are not hitting it with the power of a real 3/4” impact gun....probably like a 1/2” gun.....and short burst are better then long burst....
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  #57 (permalink)  
Old 04-08-2018, 03:35 PM
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Quote:
Originally Posted by ScratchBuilder View Post
Hi Morris,

Where did you get the SS nuts? I would like to get a set.

Thanks,

SB
I can’t remember the guy’s name.....but he is in Torrance CA. And made a lot of parts for the fellow that builds and refurbishes Cobra’s at the Torrance Airport....

Mike something.....very well known....that’s all I can remember......but the cost back then was $100.00 per nut....stainless-steel.....and they fit our wheels perfect.....meaning the angle of the mating surface.....

Hope that helps....
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  #58 (permalink)  
Old 04-08-2018, 03:57 PM
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Quote:
Originally Posted by Morris View Post
But your impact did not sound like it was hammering like it could and that is because you are feeding it with a 3/8” air line.....
You are correct. But that's an easy fix, and one I will certainly make.
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  #59 (permalink)  
Old 04-08-2018, 04:09 PM
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Quote:
Originally Posted by patrickt View Post
You are correct. But that's an easy fix, and one I will certainly make.
If it removes the spinner now.....I don’t think I would be in a hurry to change it....especially if the tool is in question.....
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  #60 (permalink)  
Old 04-08-2018, 04:14 PM
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Quote:
Originally Posted by Morris View Post
I can’t remember the guy’s name.....but he is in Torrance CA. And made a lot of parts for the fellow that builds and refurbishes Cobra’s at the Torrance Airport....

Mike something.....very well known....that’s all I can remember......but the cost back then was $100.00 per nut....stainless-steel.....and they fit our wheels perfect.....meaning the angle of the mating surface.....

Hope that helps....

I think you are referring to Mike McCluskey of McCluskey LTD.
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