Another take it for what it is worth. Please do not read anything into this post other than what the post says. Many concerns about diverter valves made me wonder what shape mine was in. I got this idea from someone else that had been testing various valves and I though it was a good test for mine. Basically with just a few pieces I temporarily rigged my valve to dump into a container of water inside the vehicle. As we all know any leakage by the valve would certainly show up in the form of bubbles in the water. My car has run some form of a higher boost pressure since it was a week old(40,000miles now). My valve did not leak any that I could see. I used long 4th gear pulls for the test. By the way, make sure you tell your buddy holding the container that you are going to let off so he can pull the hose out. We needed a towel once! I think I will stick with the stock one until it just wears itself out.

Here is a simple test to see of your stock valve is leaking.

Take the car out on the highway. Put it in 5th gear. Go to WOT, watch your boost gauge. WHen it maxes out and stops climbing quikly let off the gas and get back on it(to simulate a shift). If your boost does not go back to exactly the same amount it was at your valve is leaking.

When you dump boost out the stock valve is not strong enough to fully seat again in a fast shift. Doing this on my car with a stock valve would show diff amounts.. 20psi... then 16.... back out slow and slowly get into the gas and it will may hold.

AWE recently did a test to show that a stock valve can and does leak. Its on this board a ways down.

Its common knowledge that the stock 1.8t valve is garbage. If you look it up in the factory bosch manuals its speced at .8 bar of boost max. If you want to run a .8 bar valve then great. I dont.

Clark<ul><li><a href="http://www.turbo5.com">http://www.turbo5.com</a</li></ul>

How can you tell on a tiptronic transmission 1.8T?

Well my garbage does not seem to leak. I will try the water test doing the on/off with the accelerator. That to me would be a more accurate test than looking at a boost gauge. What if the valve is only leaking 1/10th of a pound. Could you read that on a boost gauge. Probably not. You would be able to see 1/10 of a pound with the water test. I do plan on upgrading at some point, but I am now not going to just go out and buy one. Especially since the water test has shown some of the other upgrade valves to leak.

Then get on gas again.

<ul><li><a href="http://www.turbo5.com">http://www.turbo5.com</a</li></ul>