bypassing the stock boost controller

[moll88]

can I bypass it and just run the boost from my wastegate ?

 

[AutoXRacer]

Yes, but you'll only get like 10-12 PSI...

 

[GoFast]

Yes, but you'll only get like 10-12 PSI...

QFT

 

[AutoXRacer]

QFT

"QFT"(huh)

 

[GoFast]

"QFT"(huh)

quote for truth

its ok, i didnt know what it meant either the other day. now i like to use it. it helps me remember it. lol

 

[moll88]

I am confused now ??? Haha if the stock bc leaks out excess gases, if I bypass it all the gases run thru my wg and I can adjust the boost there . Wrong ???

 

[Rotus8]

The stock boost controller works by dumping boost from the waste gate acuator, holding the exhaust to higher pressures. You can remove it to use the native controller and play with springs to bring the pressure up to where you want it. However, the ECU boost controller is pretty smart and doing things you can't do with a simple spring.

 

[tru-boost]

Yeah you got the wrong idea dude. The wastegate itself will run very low boost. The boost controler is used to raise it, not lower. The wastegate actator is nohing more than a spring that takes about 10psi to open. The boost controler bleeds boost away from the spring allowing more boost to get to the manifold without the spring breaking open. If you want more boost you need to make MORE air leak away from the WGA. You can do this with an expensive piggyback or go my route and use a much cheaper MBC.

 

[moll88]

so on that note, is that my problem with my boost. i can only hold like 12 psi, do u think my wga is adjusted to tight ?

 

[Rotus8]

so on that note, is that my problem with my boost. i can only hold like 12 psi, do u think my wga is adjusted to tight ?

No. It is too loose, or you need to bleed off some pressure from the actuator.

 

[moll88]

the wga is as tight as it will go, so I am really confused.

 

[tru-boost]

It depends on what you mean by holding 12psi. In what gear, at what rpm? It may be totally normal. A stock car only holds about 9psi up at redline. Does your boost never hit 16? Inthird gear and up you should see 15-16psi until about 5k rpm. From there it falls off fast.

 

[moll88]

In 3rd I spike to 14 really quick at about 3500 then at 4-redline it drops to 10-12, in 5th and 6th I spike to 16 and drop to 10-12 .

 

[Rotus8]

Please don't take this the wrong way, but it sounds like you have hacked something together without understanding what it is supposed to do and how it works. Where did you get the parts? Did they give any guidance as to how it was supposed to be put together and adjusted? Was it actually intended for this application? Do you have a tuning solution that prevents your ECU from doing strange things when the engine doesn't react as the ECU commands? Without a complete system design, changing individual components will not give satisfactory results.