Thread: Riva xx charger question
11-21-2012, 09:21 PM #1
Riva xx charger question
Just baught a used riva xx charger from a member here. Clutch slip is at 12 ft/lbs wich is not bad.
I know the rule of thumb is 1 ft/lbs for each pound of boost but since it is close (13.5 psi @ 8100), should I leave it alone or shim it to get a little higher?
Also apparently it has 14 hours on it but has the gold metal clutch washers, I have a set of riva's as spares with 70 hours on them, wich one should I be using?
11-21-2012, 09:24 PM #2
Toss the riva's (as long as they are 08+) on there without the shim and check the slip. Chances are you'll be around 13-14ft/lbs. I would set the slip with the riva's if they are in good shape.
11-21-2012, 09:28 PM #3
11-21-2012, 09:31 PM #4
12 lbs is 144 inch lbs. If it was mine, Id set to 180 in lbs (15 ft lbs) by using a mixture of mcmaster carr spring washers and oem washers rather than installing a shim. http://www.4-tecperformance.com/inde...oducts_id=1254
Its possible just flipping washers around will give you more grip. I think setting them up )))()spacer nut will yield the highest slip rating.
11-21-2012, 09:33 PM #5
This was on 3 different chargers too
11-22-2012, 01:15 AM #6
Hey OP. If it were me, I would leave it as it is. Just my opinion of course.
11-22-2012, 07:33 AM #7
I happen to have an old set of macmaster at home (when the online store started to sell them) and a new set (recently purchased) and the old one are about 0.005'' thicker, resulting in higher stiffness.
Even with a complete kit, I'm only able to get about 95 in/lbs (without any shims) .
11-22-2012, 07:36 AM #8
11-22-2012, 10:54 AM #9
11-22-2012, 01:52 PM #10
I have several collars & I have them seperated by size. and yes, the Riva washers are fatter.
I think they just changed suppliers.. I had no issues a few yrs ago and could only use 3 Mc's and 2 OEM's no matter what the condition of the clutch was... Well, to extent.. LOL
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