ramairws6

Oh, and this is proof how slow these SS valves rev...

http://s27.photobucket.com/user/paul...er700.flv.html

Just ridiculous ain't it! Hahahaha

FSTFRC

Paul,

Those are on the old list he used to maintain (LS7's that blew up). Maybe you could use that list to start subtracting from that 29,700 guys who have not had problems... Then come up with a factor for everyone who does not log their problems on this forum

cheers...

'06 Quicksilver Z06

I always got a kick out of that, even though you don't see that argument made much now.

lsx427z

Well I have done a set of Brodix heads and factory castings from Rich @ WCCH. Both set-ups were with bronze/ti/st. Both cars are animals. Reckart Performance here in Austin and a Vendor on here has done at least 10 sets or more. All his sets were done by Rich @ WCCH with the standard set-up. All the cars run great and make good power. 90% of them have been done with a Katech 116 or 110. Both of my set ups were on the 110, fast, header etc...

FRDnemesis

Just got my heads back from WCCH.

factory guides were "SHOT" at just shy of 18k miles.
Car has Never been on a track.

Heads still have factory intake valves. Now have SS exhaust valves and bronze guides.

I dissambled my heads before shipping them and kept the exhaust valves.


Car should be running in the next few weeks.

ramairws6

Very small percentage of valve machining errors my ***!! The list goes on and on. What a joke

z0sicktanner

z0sicktanner

anyway you could post pictures of the valve stems?

Mike.D

Add me to the list. Just got my ss valves and bronze Che guides installed by rpm.
Engine had 11,200 miles. 8 track days, and I had 4 guides that were "trashed".

Dirty Howie

Okay Mike, its safe to bring back out to the track. Hope you can make WSIR on June 1


DH

'06 Quicksilver Z06

You two bring the total in here to 230.

Congrats on the both of of you for avoiding disaster, and just in the nick of time.

forg0tmypen

I'm contemplating this. I would have Chad pull my heads since I'm an hour from him and ship them off to WCCH for bronze guides. Heads are 2013 with only 2,500 miles on them stock parts. I want to see what the katech valve train testing shows

'06 Quicksilver Z06

If you've been following this matter, you can get an inkling as to how that test is going to come out.

It will come down to how much safety margin over the 7K redline one has with either setup, before valve bounce is experienced.


My bet is that they do not find any setup other than their own setups, (torquer with stock valves and their springs, and torquer with their Ti exhaust valves and their springs) and the stock setup, which will yield as much as an 800 RPM safety margin above the 7K redline.

Now the question you have to ask yourself, is based on the way you drive, and your plans for your car, do you need a margin of error that big?

And if you don't need that kind of safety margin, then is it worth the risk of trading off the more durable solid stemmed valve for the stock valves and having one of the stock valve heads break off?

BTW, already in the below video, using HPT scanning software, we have seen a set of WCCH heads with solid stemmed valves in them at better than 7300 RPM.

The video showed me a few things.

First off if you look at the tachometer readings, the maximum RPM reached appears to be 7303 RPM at 0:36 seconds, 7301 RPM at 0:39, 7267 RPM at 0:43 of the video.

Now, what it's doing above that, and/or whether he would get valve bounce above that, I don't know. But I probably won't be driving my own car any harder than what he is in the video.

And then of course, there is this guy. If you think you're going to need more of a safety margin above redline than he does, then by all means, act accordingly. Good luck

http://forums.corvetteforum.com/c6-z...woot-woot.html

Mark2009

Wow... I was sure that the conspiracy theories from this group would be fast and furious if the testing did not validate The Fix, but I am surprised that pre-emptive strikes are being launched

Rock36

Would it really matter if you had to set your redline at 6800 rpm if your car never sees north of 6500 rpm anyway? Especially if guide wear and valve failure is mitigated by the solid valves? Is 7000 just a magical number for bragging? Any cam modification, for example, would more than offset the loss of performance from sacrificing a few hundred rpm.

I guess we will see, the test results are almost done anyway.

'06 Quicksilver Z06

Your posts and the ideas reflected in them indicate that your arrogance is only surpassed by your ignorance.

The following comes from a man who is already laying the groundwork for his "concession speech".

He's already hedging his bet on what he will say, when/if that testing shows solid stainless valves in any sort of favorable light.

Nothing has been "mischaracterized" about the arguments of those like yourself.

You said, what you said, and it is documented right here on this forum. And I am more than capable of digging it out.

$#** about "slaughtering redlines" and other nonsense.

'06 Quicksilver Z06

That's part of my point.

Well, that and the fact some never even see 7K, and so have no need to worry about "accidentally" hitting 7.8K.

But if you notice, some of them are the ones doing most of the arguing.

But on a serious note, many already shift shy of an indicated 7K when drag racing so as not to hit the rev limiter.

Still others on the road course do as well.

Howwever an inadvertent manual overrev could result in a catastrophe, and if you are driving aggressively enough, or badly or poorly enough, whichever is the case, to need an 800 RPM cushion against failure, due to valve bounce, well then by all means go with a setup which is going to give you that kind of cushion.

However I don't think that my car will ever see 7800 RPM.

Mark2009

Problem is, Quick, that I've never said a heavy valve can't be made to work (despite your attempts to re-write history), while you have repeatedly said that it will work.

So I can't be wrong however the testing comes out; you, on the other hand, have not carved yourself out such a prudent, informed position. Ergo the pre-emptive strikes we're seeing (which are going to look foolish if #6 passes with flying colors ).

Carry on, and . . . . . good luck

'06 Quicksilver Z06

You still don't get it.

I don't especially care how the testing turns out.

There are too many real world examples of success in here. Inside and outside of this thread.

Too many success stories.

So if any testing comes back which says that these setups "won't work" and that "bad things will happen if you do it", then someone is going to have to explain why it has worked for several years, in better than 30 states, Europe and Canada, and in over 200 cars, and no bad things have happened.

And it won't be us who will need to explain that.

"Predicting", and after the fact no less, that these setups "won't work", when they already have for years now, and continue to work, is not a position I would like to have to explain.

And trying to explain it away as "luck", and "bad juju is just around the corner if you keep doing it", won't get it either when there already is an 8 second car in here running in this configuration, along with 9 second cars, and several 10 second cars.

Mark2009

Ya think those valve springs keep the same, like-new tension forever?