all of the lift numbers I have quoted are measured at the valve

 

Oh OK. It seems like people would have more problems with valve seals if that is the case.

 

Well, it's no more difficult to change seals than to change springs, retainers and seals. In fact, it's a lot more difficult to change springs, retainers and seals than to just change seals. It's true that you have to remove the springs to install the retainers, but unless you recommend that people install your springs without mic'ing the installed height on the individual's head and adding shims as necessary to adjust for production tolerances, there is a lot more work to install new springs vs. just swapping out the seals and slapping the stock setup back on.

And then there is the big cost difference, especially for those who have already invested in cams.

 

changing valvestem seals with the head on the car and the valves being held in by compressed air would be a challenge to say the least. Pulling the seals off is tremendously difficult and you would have to fab a hollow tool to seat the seal onto the guide??? Again - you have already taken the OEM springs and retainers out so at that point it is much easier to install our kit and you get the benefit of a nicer spring.

We have found the spring seats machined into the heads to be very consistent from car to car on the Evos. Shimming the springs gives you proper seat pressure and a more consistent installed height - very important on a race motor running solid lifters - not as important on a street car running hydraulic lifters. You have a great point - its just not something most people want to do. For those that want that we have a full assortment of spring shims as well as "installed height" dimensions.

 

Well this is an informing thread nevertheless...

 

Lol...this is why I have yet to install cams....cause Im confused! So I am considering HKS 264/264, but I am worried about the clearance. REvolver said they designed their stuff for high HP applications if I read correctly. What about those of us not trying to make HUGE #'s? I want my car to last. I have yet to hear anything from the other guys ( Dave, Al, Shiv...) How can we protect our motors? I know a few MM doesn't sound like alot of differnence but were are talking about something spinning at 7000 Revolutions per minute a few mm becomes a very large difference. I know HKS is a very respected company and they put alot of R&D into their products but in Japan most cars don't go past 60,000 miles if I rember right due to emissions and things like that. (Not that theres anything wrong with the motors- just a requirement) So my question is will this stuff last or will it slowly toast ur engine?

 

FWIW... there may be a group buy in our near future on the Revolver retainer/spring set... Of course for less than the other sets out there right now.

 

If one considers the many thousands of miles cumulatively compiled by those running HKS cams, and considers there has not yet been one incident reported herein (not to my knowledge) that resulted from a clearance issue, then it appears to be not much of an issue at this point in time.

If it turns out to be an issue at some point, we'll just organize a class action against HKS and we'll all receive a free set of upgraded springs/retainers.

 

A "failure" in this case would not necessarily be know to the owner...

 

I got hks 272 cams and at the same time I also got ferrea valves (+1mm over stock) and crower springs and retainers. Should I worry about anything?

 

It will be known to this owner when he pops the cam cover for an inspection in 2 months.

 

What do you mean excatly? There would be no way to diagnos the problem until its to late?

I don't want get people worried, I just want to make an educated descion (even thou I can't spell LOL) regarding cams and how to make my car last

 

Unfortunately, removing the VC will not give you a clear view of what is going on under the shroud of the cam/rocker/retainer/spring. It is not easy to spot, unless you are looking for it and have the spring removed.

 

So do you guys at Revolvercams have anything for the people who have the HKS cams already? You sound like you guys are very knowledgeable about the issue, but $900 for your cams is kinda expensive when you compare them to the $500 for HKS, I didnt get a chance to check out what you charge for the rest of the stuff...Whats that go for?

 

I believe if you look at the Revolver cams website, you get the cams, springs and retainers as a kit for $900. I believe I've also read that you can buy the springs and retainers seperately.