Aftermarket cans burning titanium valves?

jab0321 · 08-05-2005, 04:47 PM

I saw in an article the other day that there might be a problem burning up titanium valves on the new GIXERS if you add on an aftermarket exhaust. Has anyone heard anything about this? And if this is true, is it because the increase of HP is too much for the valves or what? It doesn't really make sense to me b/c titanium is suppose to be much stronger anyway.

jimmy 2 times · 08-16-2005, 03:46 PM

i have never heard that, do you have a link?

GixxerJRG · 08-16-2005, 06:19 PM

I heard a few stories about aftermarket exhaust burning through the plastics but not the valves. There was a thread in this forum not too long ago. I'll see if I can find the link.

ChrisNJ · 08-16-2005, 11:53 PM

Titanium is not a good metal for high heat applications. It wouldnt surprise me.

Phat_Albert · 08-17-2005, 03:25 AM

Even the yosh pipes, which are seemingly designed around Suzukis?

ZXLNT · 08-17-2005, 07:05 AM

Do you really think the Factory (Suzuki) would use Ti valves if they thought aftermarket exhaust would damage them? They know people are going to hotrodding the engines. I wouldn't worry about it..

badgixxer · 08-17-2005, 07:45 AM

Quote:

Originally Posted by ZXLNT

Do you really think the Factory (Suzuki) would use Ti valves if they thought aftermarket exhaust would damage them? They know people are going to hotrodding the engines. I wouldn't worry about it..

+1

jswledhed · 08-17-2005, 09:48 AM

If you add a pipe and don't adjust the mixture and the engine ends up burning way lean, I could see this happening.

jk750 · 08-17-2005, 06:26 PM

^Exactly. It's not the ti valves, nor the pipe. If it ever happens at all, it's because of running way too lean.

jab0321 · 08-17-2005, 10:21 PM

Quote:

Originally Posted by jswledhed

If you add a pipe and don't adjust the mixture and the engine ends up burning way lean, I could see this happening.

Yeah that would make sense. Thanks for the input guys. I think that I am going to keep the stock pipe on for a while though on my bike. It looks great, and it keeps growing on me.

Zixxer10 · 08-27-2005, 07:21 AM

This whole thing sounds like an urban myth to me. How "way lean" is the fuel mix going to get on a fuel injected engine, and what "can" is capable of producing such significantly higher air flow that the engine will get outside the injection range of the computer? Be careful, I think the sky is falling.

mstingray · 09-28-2005, 04:55 AM

Quote:

How "way lean" is the fuel mix going to get on a fuel injected engine, and what "can" is capable of producing such significantly higher air flow that the engine will get outside the injection range of the computer?

unlike cars, FI sys. on bikes are still relatively primitive and do not adapt to changing a/f ratios when parts are changed which is why they need to be remapped or a PC needs to be added to "trick" the ECU to increase fuel delivery.

FWIW, any engine will overheat and die if it's running under lean conditions.

jim schmidt · 09-28-2005, 10:11 AM

The point about open-loop systems is valid, but I seriously doubt a full system is going to start burning valves. I'll go so far as to say it won't.

This is either an urban myth, as suggested above, or an excuse because Suzuki's got a design problem. But since we haven't heard from anyone who roached a top end yet, I'm guessing the former.