Question for folks running 69mm pulleys on roush setup

[nnnnnn]

I want to run a 69mm pulley on my Roush Phase 2 2016 mustang. Stock is a 6 rib pulley and 80mm.

For folks who run 69mm on these 2.3L TVS setups or who know about these setups, are you getting belt slips? Seen folks getting belt slips? If not, what's your setup to avoid belt slip?

Going to an 8 rib belt complete drive system just to be able to run 69mm seems a waste of money. Is 72mm pulley with 100mm idler the smallest pulley I can run with no belt slip?

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[Torinate]

Interested to find out myself.

I’m considering a Griptec pulley but really want to find out how successful they are in stopping any belt slip.

 

[Proshop]

I run a 69 and to my knowledge haven’t had any belt slippage with it.

 

[Torinate]

I run a 69 and to my knowledge haven’t had any belt slippage with it.

Regular or Griptec?

 

[Proshop]

Regular or Griptec?

Just a regular. Didn’t feel like changing everything over unless I ran into issues.

 

[Torinate]

Griptec pulley just goes in place of the regular pulley on the supercharger.

 

[Goterr0r]

How much more boost are you guys seeing with the smaller pullies on the Roush setup?

 

[Proshop]

Griptec pulley just goes in place of the regular pulley on the supercharger.

Didn’t know Griptec offered a 6 rib thought it was only an 8, which is what I meant by changing everything over. I went with a SPE 6 rib.

 

[Proshop]

How much more boost are you guys seeing with the smaller pullies on the Roush setup?

I’m around 13-14 psi!

 

[Torinate]

Ah. Never heard of SPE. Wonder how it stacks up against the Griptec?

Looks good!

 

[Proshop]

Ah. Never heard of SPE. Wonder how it stacks up against the Griptec?

Looks good!

https://www.spemotorsport.com/
Looks very similar to the griptec. I’ve had it on for about 6 months with no known issues.

 

[hlfbkd420]

I’m around 13-14 psi!

is this on a 2018+ kit?

 

[Proshop]

is this on a 2018+ kit?

Yes it’s on a 2021.

 

[Cory S]

I ran a 69mm Griptec on a Roush 2.3L. 13-14psi, no slip. Stock damper.

I run a 69mm Griptec on my 2650 now, with no belt slip as well.

 

[nnnnnn]

Thanks guys for the answers. Good to know no slip issues. Griptec seems the way to go

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