30 replies to this topic

[nicklouse]

The backing of was also advised in the fiat /lancia AR and fire engines, like above, I guess its something to do with friction.

Alloy heads?

I get the possibility of backing them off to reduce the friction but what happens if the friction between the nut and stud thread is greater than the friction between the stud and the block. As we know different thread form so will not be the same but as to which naturally would have more? I know cases when changing head gaskets where the stud has unscrewed.

I would also thought that if it was better that people like ARP would mention it in their fitting info.

[Dusky]

Yep, alloy heads

[hhhh]

I wouldn't have believed it if I hadn't clicked on the link. Are Mini Spares living in some sort of alternate universe where torque is measured in lbs per square foot? That must be torque in the 4th dimension or something. I know my torque wrench doesn't read in those units.

 

With the smattering of torque values through this thread, I though it might be best to also mention the supplier's low-down on the studs that the OP has bought;--

 

"and they torque to 42lb per sq ft."

 

https://www.minispar...|Back to search

 

https://www.minispar...|Back to search

 

I'll just say from my own experience, that I've found these to be a different stud to the OE ones, while I have been able to pull those down to 50 ft / lbs all day, these new ones I've broken before getting to 50. Why did I try them to 50? Well, they do carry the OE Part No!

 

<Edit: The OE ones had quite a distinguishable taper on the UNF end, the new studs have no taper.

 

The figure of 45 that I quoted it seems is now incorrect. I got that from 'Instructions' that were included with a set of these studs that were supplied to me a year back. >

[Spider]

 

I wouldn't have believed it if I hadn't clicked on the link. Are Mini Spares living in some sort of alternate universe

 

 

Well, everybody's gotta live somewhere.

[59 Speed]

Sorry for the thread takeover.

But I'm using Mini Spares 11 stud kit with the chamfered washers.

Which way do the washers go?

Some people (inc ARP) say chamfer up.
Some people (inc Mini Spares) say chamfer down.

Which one is it?

Ta,
Ian

[Spider]

Sorry for the thread takeover.

But I'm using Mini Spares 11 stud kit with the chamfered washers.

Which way do the washers go?

Some people (inc ARP) say chamfer up.
Some people (inc Mini Spares) say chamfer down.

Which one is it?

Ta,
Ian

 

By chamfered, do you mean Bevel Spring Washer?

 

Like this, but assume the bolt head is the nut.

 

[gazza82]

 

I wouldn't have believed it if I hadn't clicked on the link. Are Mini Spares living in some sort of alternate universe where torque is measured in lbs per square foot? That must be torque in the 4th dimension or something. I know my torque wrench doesn't read in those units.

 

With the smattering of torque values through this thread, I though it might be best to also mention the supplier's low-down on the studs that the OP has bought;--

 

"and they torque to 42lb per sq ft."

 

https://www.minispar...|Back to search

 

https://www.minispar...|Back to search

 

I'll just say from my own experience, that I've found these to be a different stud to the OE ones, while I have been able to pull those down to 50 ft / lbs all day, these new ones I've broken before getting to 50. Why did I try them to 50? Well, they do carry the OE Part No!

 

<Edit: The OE ones had quite a distinguishable taper on the UNF end, the new studs have no taper.

 

The figure of 45 that I quoted it seems is now incorrect. I got that from 'Instructions' that were included with a set of these studs that were supplied to me a year back. >

 

 

You're living in Mini world now ... NM didn't exist in those days ... my draper does both!

[gazza82]

I've got that stud set too and was wondering the same ... not sure if you can see from this image ...

 

 C-AHT280_Washers.jpg   17.94K   9 downloads

 

otherwise search for C-AHT280 on Minispares site

 

http://www.minispare...c/c-aht280.aspx

Edited by gazza82, 12 February 2016 - 10:48 AM.

[jaydee]

How do i convert lbs x sq ft into N lt?

[Spider]

I've got that stud set too and was wondering the same ... not sure if you can see from this image ...

 

C-AHT280_Washers.jpg

 

otherwise search for C-AHT280 on Minispares site

 

http://www.minispare...c/c-aht280.aspx

 

Got ya now ;)

 

Countersunk side of the Washer Down,

[Spider]

How do i convert lbs x sq ft into N lt?

 

In the 4th Dimension!

 

Keep Up   LOL

[Swift_General]

How do i convert lbs x sq ft into N lt?

For lb ft to Nm multiply by 1.36 (or by .737 going the other way). i.e. 74 lb ft is approx 100 Nm.

[59 Speed]

I've got that stud set too and was wondering the same ... not sure if you can see from this image ...
 
C-AHT280_Washers.jpg
 
otherwise search for C-AHT280 on Minispares site
 
http://www.minispare...c/c-aht280.aspx

 
Got ya now ;)
 
Countersunk side of the Washer Down,

Eg. The opposite of this?
 image.jpg   17.69K   5 downloads

ARP and Keith Calver say this way (as shown above)

I'm just a little confused why some say this way and some say the other. What are the reasons?

Cheers,
Ian

[hhhh]

Just to "clarify," Mini Spares is using the unit "lbs PER square foot" (force per unit area) which in this universe would measure pressure, e.g.: air pressure, not "lbs x sq ft," which is meaningless, or the proper "ft-lbs," (force X distance) which is the "conventional" Imperial unit of torque.

 

 

How do i convert lbs x sq ft into N lt?

For lb ft to Nm multiply by 1.36 (or by .737 going the other way). i.e. 74 lb ft is approx 100 Nm.

 

[Cooperman]

 

Just to "clarify," Mini Spares is using the unit "lbs PER square foot" (force per unit area) which in this universe would measure pressure, e.g.: air pressure, not "lbs x sq ft," which is meaningless, or the proper "ft-lbs," (force X distance) which is the "conventional" Imperial unit of torque.

 

 

How do i convert lbs x sq ft into N lt?

For lb ft to Nm multiply by 1.36 (or by .737 going the other way). i.e. 74 lb ft is approx 100 Nm.

 

 

It's just a small error. We all make them at times unless one is prefect  .