<VV> Re/ Turbo hose clamps

[Frank DuVal]

Hose clamps should not be on the high point of the barb. The clamp 
should ride on the outside (cut end of hose side) of the barb, bending 
the hose over the high point of the barb. This helps seal if the barb 
high rib has low spots in it.

      CCC XXXX
     XXXXBBBBXXXXXXXXXXXXXXXXXXXXX


In this top view of the hose, the clamp is the CCC   the rib is BBB and 
the XXXs is the rubber hose.

Clamping on the high row of XXXs puts less clamping pressure on the hose 
than placing the clamps on the CCC area.

Frank DuVal

On 10/25/2014 10:12 PM, Jim Simpson via VirtualVairs wrote:
> I've tried to get the clamps on the high point of the cross-over as well
> the turbo outlet.  I suspect the issue is a combination problem; the OEM
> clamps are not that well designed in that the clamping bolt tends to bend
> the tabs, thus limiting the amount of pressure you can put on the hose.
>
> The second problem is probably the hose itself.  The original material is a
> hard rubber and as it ages, it gets harder yet.  I suspect that getting it
> to conform and seal is a bit of an issue.
>
> I'm looking at modern silicone hoses designed for turbo installations.
> Couple them with some decent "T-bolt" clamps, or even better some of the
> specialty clamps from Turbosmart, and I "should" be able to a decent seal.
> Of course, I need to recheck the cross-over to head bolts & gaskets and the
> bolts on the turbo compressor to be sure there are no leaks there either.
>
> Jim Simpson
> Group Corvair