Well, the same shop (Tuning Technologies) put in the set of 264s that ran silently after two sets of Revolvers made this noise at 0/0.

As for putting the cams in facing the right direction, they'll only go in one way..and only one of the cams (exhaust) has the bolt hole for the cam angle sensor, so it's pretty idiot-proof.

And for the record, I'm not the only one who has experienced this noise at 0/0 with the Revolvers. Refer to this thread for another example of the exact same problem.

 

I have to say I'm more then happy with my revolvers and they didnt even get a real tune yet and already picked up 20wheel lbs of tq plus they sound crazy lumpy

 

Not sure how many total sets of Revolvers we installed but it was A LOT of them. We've never had any noise or problems from a single set of them. It's just too bad they aren't available anymore.

 

I think someone should mass produce some knock offs DB

 

I cant comment on the revolvers but these crower 280s were dead quite at 0/0. just 2 degress advance on intake made then dead noisy. So noisy I was afraid to rev the engine past 2500. But nothing was hitting or rubbing to make the noise. I beleive the noise comes from overlap. The shock waves that normally are directed out the exhaust at the muffling turbo must be coming out the intake instead. Thats the only thing that makes any sense to me as far an explaination of the noise.

Installing smaller cams that do not make noise did not fix your problem. It just masked it. 2 degrees retard made these cams quiet. Installing smaller cams is like retarding 5 degress or more. You were sent a known good set after the first set didn't work. They did the exact same thing. By saying all revolver cams are bad you have drawn the wrong conclusion. The real conclusion is either the cam install was off time or the gears where off time. I give the benefit of the doubt to the installer and say the gears where mismarked a bit. The fact that the 264s didn't make more power than stock is also an indication of this.

 

The real restriction or "problem," as you say, with my setup at that time was the turbo kit. AVO uses a T2 exhaust flange instead of a T3 for their Garrett 3076 kit. This lack of flow was the primary issue with the VIII not making more power.

I can't say that all Revolvers are bad for all setups. Obviously some people are quite happy with them. I do believe, though, that the vast majority of the Evo community won't tolerate the severely-aggressive idle, and won't achieve their desired power output unless they have a speed density setup, ported head, etc etc. These cams are for race cars, not street cars. Personally, even if I were building a race car, I wouldn't install Revolvers again due to the fact that OGVW couldn't keep his word. I've got no time for vendors without honor.

 

Revolvers don't really work that well on west coast cars, I am saving up for Buschurs cams see how those do, I have HKS 272's now

 

only west coast cars?

 

I would say that not enough information was gained to say categorically why the Revolvers made that noise. There is no debate they made the noise, but because another set of cams didn't have the problem doesn't tell you the problem was with the revolvers. It just tells you there was no problem with those set of cams.

 

http://www.youtube.com/watch?v=QWG2LrGEFhE

Here's another car with Revolvers that make the same valvetrain noise. I suppose some people are willing to live with it, but I can't bear to hear my engine sound like this.

Again, yes, it's the cams.

 

That is a sample size of 2. Aren't there cars running the Revolvers without that issue? Also, I remember they (Revolver) recommended running the cams on a stock turbo @ +2/0.

You still don't know why the car was doing this. You may think you know, but that doesn't mean you actually know.

 

since when did revolvers get made for evo9s? @_@

 

In post #211 (top of this page), I quoted another example...so that's 3 specific instances along with many more anecdotal examples cited by various West coast shops.

No, Revolver never made cams for the IX. This thread was created back when I had an VIII. Heck, they don't even make cams for the VIII anymore . Wonder why..

 

I think you're misinterpreting my point. Obviously, there is some issue with the cams. I'm just trying to get at the "why?" I don't think we've answered that conclusively (or scientifically). The best explanation I've heard so far was "overlap," but without observing that under more controlled conditions, it's still just conjecture.

BTW, where are these anecdotal stories from West Coast shops? Genuinely curious as to who/whom said something.

 

The issue isn't with the cams per se, but rather with the stock EMS & MAS. I love these cams on my car, but I have an AEM and while it idles around 1200, midrange torque is pretty awesome for a 2.0L.