Turbosmart pops?

[07speed3]

this site really cracks me up

??

 

[Abilor]

this site really cracks me up

Your mom cracks me up.

 

[Abilor]

Consider going on-line to a spark plug manufacturer site or any independent sites dedicated to race engines and get the info you need to learn to "read" the plugs when you pull them.

Data logging is great for many tuning purposes and should not be discounted. It can save your butt and can help improve engine performance. But you can data log all day long and study the data till the cows come home and not learn as much about actual combustion chamber conditions as you can by visually examining the spark plugs if you know what you are looking for.

Ask any crew chief on a competitive professional drag racing crew.

Example: http://www.dragstuff.com/techarticles/reading-spark-plugs.html

Knowing a little about the "black art" of spark plug reading can be helpful. As pointed out at this source, subtle differences in plug appearance, even from one WOT run to the next can tell you a lot.

Thanks for the info! I will check it out...

 

[meicalnissyen]

Same here

My cats purr like a kitten.
large insistent kittens

 

[meicalnissyen]

The BPV should be closed when the car is idleing. If it's open it will cause a rough idle and maybe even stalling if it is bad enough.

Think of it this way, if the valve is open at idle you are just circulating air around the turbo and none of that air is going to the engine.

If your valve is set up perfectly it would be closed at idle but if you go any more negative with the vacuum pressure it will open. This is what happens in-between shifts. To simplify what is happening, when the throttle plate closes causing a negative pressure spike (more negative than idle would be) the valve opens and releavies the pressure buildup at the turbo compressor.

except the turbo is not spooled up at idle, hence valve closed

 

[meicalnissyen]

except the turbo is not spooled up at idle, hence valve closed

What I meant to say was thatwith the turbo unspooled, it is ok for the valve to be closed since no surge could occur. fingers flying with disengaged brain