Wastegates

[ascension24]

How do you set a wastegate, is it just a pressure spring you gotta play with until you hit the right psi?

How does a boost controller work then, are wastegates electronically controlled? Or do the boost controllers control a solonid or stepper motor which controlls the wastegate?

Im guessing their would be a whole host of different ways or is their a standard?

 

[253@7k]

Ok, a waste gate is vacuum activated, the spring pressure can be changed to get more or less boost, but the vacuum can also be changed through a boost controller. A vac line will go from manifold to waste gate and a boost controller goes somewhere along this line. The boost controller then controlls the vacuum pressure going to the waste gate: more vac = less boost, less vac = more boost.

I hope that explains it, if anything was too confusing let me know.

Steve.

 

[253@7k]

I found this, it may explain things better:

http://www.turbosmart.com.au/index.php?s=faq

 

[hinterland]

most external wastegates are set useally 9 to 14 lb with non adjustable spring and a boost controller which allows boosted air to be bled of to open or close it depending on how it is setup.internal waste gate same trip but uses acuator to keep shut and boosted air bled of to keep shut or unblead air to open when exhaust presure is greater than spring preasure.

 

[ascension24]

That linked help, but wasnt really techincal enough, left too many questions unanswered.

I keept searching and found this, explains it all nicely plus a diagram which really helps.
http://www.turbosaturns.net/articles/wastegate101.htm

Its what you said slundy, but with a diagram and written up nicely.

 

[253@7k]

Good site. Explains things well.

 

[burnz]

i will still say a wastgate is better than a bov
as the site doesen't say(read between the lines)
it doesen't protect against over spool of the turbo

 

[253@7k]

i will still say a wastgate is better than a bov
as the site doesen't say(read between the lines)
it doesen't protect against over spool of the turbo

What??????

Its not the choice of one or the other, both do different things and both are needed for a turbo charged petrol engine. You cannot say one is better than the other, its like saying "I would prefer to have a gearbox on my car than a diff".

 

[burnz]

What??????

Its not the choice of one or the other, both do different things and both are needed for a turbo charged petrol engine. You cannot say one is better than the other, its like saying "I would prefer to have a gearbox on my car than a diff".

over spool is the question bov don't protect

 

[253@7k]

over spool is the question bov don't protect

Whats that got to do with anything?