Are HKS cams rubbing on the stock valves springs or after market? It can be done while the head is on but the champers needs to be pressured.. Only good shops can do it.

 

They were the stock ones... let me find the thread and I'll post a link to it from here.

 

https://www.evolutionm.net/forums/sh...d.php?t=117752

Here you go. It is quite an interesting read, if you get through it all.

 

I read the whole thing.

Thanks for the info. I will be adding springs and retainers for sure

 

If you find a good installer (if local, even better), let me know.. as I will be wanting to install them too.

 

These are removed during a cam/headstud install right? Just curious if there would be any extra labor charges on putting new spring/retainers during a cam install.

 

Nope they are not removed... There will be extra charge I am srure.

 

That sux. Thanks!

 

For installing valve springs and retainers, id say that a shop would charge a little more than they would for installing cams (just an estimate). The labor involved is a complete bit**....trust me, ive swapped out valve springs and retainers before. Again, i dont think its worth the trouble, but if u gotta have a crazy high redline, then go for it.

 

I think it's more of a "better safe than sorry" feeling, rather than having to do with performance, really. I'm sure installing these is a good alternative to paying for a new valvetrain, IF it is determined that the seal contact has negative long term effects.

 

You have a valid reasoning, its just a little more money than most people r willing to spend. I dont know if u answered this already, but do u have a turbo upgrade? If so, is it really necessary to rev to 9,000 RPM+? I would think that even 7500 RPM would be sufficient, and maybe 8000 RPM if u really wanna pus it. I dont mean to deter u from what u want to do, im merely trying to inform u that u dont need a ridiculously high red line. And i would recommend sticking the the crower valve springs/retainers as they are half the price as the ferreas and are more than adequate for your needs.

 

Like I mentioned - I'm not installing these so I can increase my redlineIt has been discovered that there is contact with the valve seals regardless of the rpms (and any contact is BAD). Yes, if I had these installed, I could increase my redline, but my primary reason is not that, but rather, to save my valvetrain from getting worn down in the long term. I plan to drive this car into the dirt, so this would be a good precaution if you plan on having aftermarket cams.

And no, I don't have a turbo upgrade, but I do have HKS cams. If you read the thread I linked earlier, you'll understand what I'm talking about.

 

Can your rods/rod bolts handle going over 8000rpms safely??

 

I agree. Any contact of the valve seal is not good. When I finally do upgrade cams, I'm definitely going to upgrade the valve springs and retainers at the same time. The cost of the springs, retainers, and install will still be less than repairing your valvetrain should a valve float.

 

The 4G63 is a really strong motor, so it could handle over 8000 RPMs to a certain extent....if u constantly redline it, ur gonna end up blowing a rod through the block. Another thing thats gonna go are your snychros, which were not ment to handle and 8000 RPM+ shift, so thats a whole other issue by itself.