hi there, did a little search here.. didn't find anything.. has anyone purchased the Superformance BV..? its a decent amount cheaper then the capristo but there is zero description on the site. there is only a picture, and it looks identical to the capristo..and in the picture it even has the vacuum solenoid assuming its the similar reverse function. default open, vacuum closed etc.. I emailed them, and the person said they are manufactured there in the UK.. I asked question regarding the function, but was brushed over with default response " its an oem replacement part". so basically that's not an answer. anyways has anyone here used it..? thanks
Looks like the capristo to me. Their design used ball bearings instead of the busing thats prone to rattle in the OEM. Mines stated to rattle again, might might be a good option. feedback would be nice
hi Ken, thanks for the reply.. so even your capristo valve started to rattle eventually..? which is obviously the whole point to solve/avoid. I read something interesting on the capristo site in the description, and they make a point to say, the vacuum must be at least 10-12psi to avoid the rattling.. my current oem valve functions perfectly.. but once car is fully warm, at idle, it buzzes, not a rattling.. unlike my previous oem valve, it rattled so loud, it was ridiculous..
hi Ian, thank you for confirming.. so when you bought it from Superformance, did it come in a capristo box, or included any capristo literature..? interesting, SF said it was made there in the UK.. whereas I understand Capristo is German.. so are we assuming its just a non branded capristo part, or is it still branded capristo..?
Opps, sorry. To clarify my stock valve is buzzing/rattling again. I had capristo valves on my twin sound exhaust i used to have, they look well made and and IMO shouldn't have an issue with buzzing or rattling.
ah ok thanks for clarifying.. so what did you do to stopped the rattling initially..? I assume the 2 counter clockwise rotations on the diaphragm.?
No, the tightening the shaft didnt help at all. I popped off the cap on the shaft and tried to understand it. There is a spring in there that pushes on a ceramic cone which holds the shaft. It appears carbon buildup causes it not to seat very well and thus causes the rattle. I cleaned it and seemed to work for a while. but it returned. I think if i was to adapt the bearing style instead, it would fix it. project for another day
It's Capristo branded. Comes in a bag with all the parts Image Unavailable, Please Login Image Unavailable, Please Login
thanks for much.. imaging that.. its even capristo branded.. well a little bit of arbitrage to be had with their pricing.. I assume you have it installed or not yet..? also why does it come with those rings, I assume they just snap/lock in?
Yes the rings snap into the unit and act as gaskets. I actually sold it on (arbitrage ) -- I thought my valve was seizing up, but it turns out a new one has just as much resistance in the spring.
I bought one from superformance as well it was a Capristo. If you have a slight vacuum leak the Capristo valve can rattle. If it looses vacuum it can start to slightly open which will cause a rattle.
ok interesting, as the capristo site said regarding vacuum.. I guess best to check the vacuum to make sure its all good, before looking at the capristo valve.. regardless from where, I think its absurdly over priced and would absolutely loose my mind if bit the bullet, and it rattles on me. yes fine that would mean a vacuum issue but still. that said, the vacuum dynamic for the capristo.. would not apply to the oem valve.. since oem uses vacuum to open it.. so as Ken mentioned above, the buzz/rattle sound we all know at idle, is due to the bushings design inside the diaphragm of oem valve.. meaning its not because of weak vacuum causing it to rattle/buzz.
Yes the weak vacuum will affect the Capristo unit. Worn bushings is what causes the OEM valve to rattle. I have even seen the housing where the flap has worn an edge into it from vibration.
Can the bushings be replaced or does it require replacing the whole unit? Sent from my iPhone using FerrariChat.com mobile app
It's a hemispherical ceramic bush. Couldn't find any replacements when I pulled mine apart and one of the originals had cracked into three pieces. I made some stainless replacements but it's already starting to rattle again. Part of the problem with changing the material is knowing what the clearance should be to allow for the shaft expansion.
