wastegate thoery

[swankmetal]

would it be a good idea to rig up a wastegate actuator that consisted of an electric pressure switch and solenoid? or is there a good reason to gradually open the gate?

 

[matches]

OK two questions, first of all wich turbo do you have that has a wastegate, second question is why would you want to mess with it if it does?

IMO the sudden opening of the gate will cause to much pressure decrease and actually work against it self.

 

[desertrat1]

I was thinking about this for mine as well. There is actually a device you can put on your wastegate line to do exactly that(ricer parts). The theory is your gate won't open until you achieve the boost you want. Makes for noticably faster spool up because the gate isn't gradualy opening bleeding off exhaust as boost rises.

 

[swankmetal]

i'm running my not quite stock h1c. i've got a 12cm housing and i cut a map width enhancement slot in the compressor housing. so it's basically a wh1c.



Makes for noticably faster spool up because the gate isn't gradualy opening bleeding off exhaust as boost rises.



that would be why. but i was thinking that the sudden drop in pressure wouldn't be good either. just wanted to get some input.

 

[JLEONARD]

I wonder if you could control the size of the opening with a stop to prevent too much sudden loss??

 

[swankmetal]

what are ya thinkin, j? as in, what kind of mechanism?

 

[RustyJC]

The idea of the wastegate is to control boost at a predetermined level. This requires proportional, not 2-position "off/on" operation. Additionally, if a large wastegate is snapped open instantaneously, this will chop turbo drive energy and (just like jumping off the "throttle") could result in compressor stall (aka "surge" or "barking").



Rusty

 

[JLEONARD]

 what kind of mechanism

Just wondering that if you opened the wastegate just a little bit, if it would bleed off just a little pressure or keep it from building, and not make a total pressure dump.

In other words limit the travel so the gate doesn't full open. Then experiment with this to tune it.

Would act like a leak in the boost system perhaps??

 

[sui114]

why dont yall consider a blow-off valve. they are simple in design and are pretty universal. look on a import website to find out more. i have a blow-off valve off of my brothers rx-7. i beleve one of the diesel performance suppliers has them.