Longer grade 12.9 supercharger bolts

[howjta]

Was looking for some bolts to go with the FI Spacers and can’t find a ton of info online or options. Wanted to see if the 200mm ones listed here would work

 

[vortecd]

What is wrong with the ones that came with it?

 

[howjta]

I bought a used set of spacers and did not come with bolts unfortunately

 

[Mike L.]

What is wrong with the ones that came with it?

The spacers are 10mm thick. The bolts supplied are 5mm longer than stock. I won't install mine till I get proper bolts.

 

[vortecd]

The spacers are 10mm thick. The bolts supplied are 5mm longer than stock. I won't install mine till I get proper bolts.

I installed what ever bolts they sent me. I do know someone got some titanium ones but they were pricy

 

[howjta]

I was more looking to make sure that the threads are correct, head diameter is wide enough and other specification are in line with what FI sends. I guess does anyone have the exact specifications that their bolts are?

 

[vortecd]

Only issue I have with the stock ones is they are turning rust color. I would be down for something different that didn't rust. Does anyone know of another option?

 

[vortecd]

According to Mike, they are 5mm longer then stock. Let me see if I can find my stock ones

 

[Mike L.]

ARP said they would make some but, it would cost way too much for a small run plus it cost extra because I didn't want black. So I passed.

 

[vortecd]

So the stock ones to the top of the head are 200 mm
The head of the bolts is 7 mm

 

[vortecd]

Top of the bolts appear so show 8.8

 

[vortecd]

ARP said they would make some but, it would cost way too much for a small run plus it cost extra because I didn't want black. So I passed.

I'm good with black

 

[vortecd]

Was looking for some bolts to go with the FI Spacers and can’t find a ton of info online or options. Wanted to see if the 200mm ones listed here would work

View attachment 46542

That 91290A484 could be what comes with the spacers. $2.41 isn't to bad
I was looking around to see if there was anything else and didn't see anything. Other option would be the 220 and cut them down if need be. You only have 28mm of thread but depending on how deep they can go may actually get more thread in them

 

[howjta]

That 91290A484 could be what comes with the spacers. $2.41 isn't to bad
I was looking around to see if there was anything else and didn't see anything. Other option would be the 220 and cut them down if need be. You only have 28mm of thread but depending on how deep they can go may actually get more thread in them

I was hoping maybe I stumbled across what they use. The heads on these show 13mm? Does that sound about right?

 

[vortecd]

They appear to be about the same height as the stock ones 7mm

 

[Diboblo]

I think this sums it up.

Post 4

https://www.hellcatforum.org/threads/blower-spacer-bolt-length.4961/#post-52810

Post 18

https://www.hellcatforum.org/threads/blower-spacer-bolt-length.4961/#post-52810

You will need a 205mm bolt, to maintain OE thread depth, if that is your concern. Also, bolt length is generally measured as the shank and does not typically include the head.

Bob

 

[vortecd]

I think this sums it up.

Post 4

https://www.hellcatforum.org/threads/blower-spacer-bolt-length.4961/#post-52810

Post 18

https://www.hellcatforum.org/threads/blower-spacer-bolt-length.4961/#post-52810

You will need a 205mm bolt, to maintain OE thread depth, if that is your concern. Also, bolt length is generally measured as the shank and does not typically include the head.

Bob

Interesting read. Like many things in life, I think it is being over thought. If the blower sat upside down or sideways where the weight was pulling then I would think about it more. All the weight is pressing down and the bolts are just holding in place

Like I said to OP he could go longer and cut them down. I do not know how deep the holes go so he may not have to cut any off or very little