I Had a Dejon charge pipe set up on my car for 8 months now, love it. I bought a Dejon bypass valve spring at the same time, with my injen CAI it sounds like a BOV!

Well onto the point of this post. I purchased a manual boost valve controller from dejon sunday night. I was surprised to see that it was on my door step tuesday. Fastes ground shipping ive ever had for an online purchase! Well any way i installed it today, and what a difference. Boost is almost instantanious. Boost reaches it's peak much sooner. Also you can powershift it with absolutly no drop out in the boost pressure, with out using liftless shifting. I was smiling ear to ear all the way home.

 

a/f ratio stock?? u prolly need a tune

 

and a driver mod

 

can you get a pic or two of the install?

 

If you were tuned you would see the same results. And get better hp and boost gains.

 

and you still have to tune anyways so basically you probably just waisted a few hundred

 

Perhaps you could upload a sound clip to hear it xD

 

I'm already tuned with hp tuners for 22psi, the same pressure im running with the boost valve. The main reason i installed it is for power shifting. I wanted the ability to be able to maintain boost during shifts, without using lift less shift(only works a WOT}. Plus i can Change the boost levels in a matter of seconds rather than 10 min from hp tuners. Im probably going to install a ball valve or a switch to allow me to switch between manual boost valve and computer controlled. Ill post pictures tomarrow

 

I thought the manual boost controller I saw recently was very interesting. Thinking about playing with the GMS1 tune and the Forge BPV that now fits in our cars.

 

To let you know there is only one way to maintain boost during shifts and it's a wot shift. Once the throttle plate closes it has to blow off, meaning you lost boost.

 

Except with this manual boost controller. I dont have to be at wot to maintain boost

 

subd lol

 

50 bucks well spent. When you lagging because of no boost between gears, ill be the silver blur on your left.

 

You are confused, and likely your ECU too. Boost controllers do not interfere with BPV/BOV action.

 

Who are you talking to. I never said anything about bpv/bov. It manually controls the waste gate.

 

Yes indeed. Aren't you concerned about overloading the Turbo?
Anyway you cut it, you're keeping the turbo *working harder and longer*. Waste gate control by the ECU is muted...allowing exhaust gases to spin the turbo longer. More stress and HEAT for the Turbo.

 

What do you mean by muted. And the only time the turbo would be working any more than the factory set up is between shifts, which i can control with my foot.

 

This is the one right?

DEJON | Powerhouse



Why do you think it's only working between shifts? You have added an OVERALL delay for the wastegate opening. ANYTIME a signal is sent for it to open (and it's not only between shifts), it will be delayed..in effect increasing boost at these times.

From Dejon..not saying this will happen, but it shows you it effects more than boost between shifts.

" During highway driving, a manual boost controller may spool up very quickly which may cause the ECU to generate error codes, check engine light and/or putting the car into limp mode."

 

i think by using this boost controller. it greatly lowers the delay. not increases it. When you let go of the throttle. you hit vacuum and the BPV opens dumping the positive pressure. But being a manual controller. as soon as the throttle is Wide Open again. the boost is created even quicker because theres no delay from the ECU controlled wastegate. thats what he is seeing, this turbo spooling with virtually no lag.

hence why Dejon Postedsthis.
" During highway driving, a manual boost controller may spool up very quickly which may cause the ECU to generate error codes, check engine light and/or putting the car into limp mode."

this little turbo, and being split scroll ontop of that spools up frickin fast on a MBC. so the ecu BC calms spool time to avoid over boosting and to keep it from being too sensitive. IE make boost when you dont want it for example

 

I ment that its only working the turbo significantly harder between shifts.
It does not delay the wastegate from opening, it disables it from opening completely. Unless the boost pressure reaches a set level. And it opens the wastegate much sooner than ecu controlled. Saving the turbo and engine. When boost reaches what i set it to, the waste gate opens immediatly. I get no spikes in pressure with the mpv. The ecu has to see that the map sensor is reading max boost. Then send a signal to the solenoid to activate. To send pressure to the Waste gate actuator. Which causes spikes in boost before it settles.

As I said in my early post im going to install a three way ball vavle to interchange from stock to manual. I have a brand new spare turbo. Car is still under warrenty. Im the only one who works on my car, so i dont feel like voiding my warrenty for my mods. I get paid to do warrenty work on my car. I get employee prices on parts. Free cod labor. So not too concerned bout overheating or prematurly wearing the turbo. Probably gonna switch to a bigger turbo at some point any way. And ive only driven 30 miles or so since installing the mbv. So as for dtc's and trouble shooting, only time will tell. Gonna data log and retune this weekend.

If your not breaking it your not driving it.

 

Ok...so you set the threshold HIGHER for opening the wastegate...understood. Anyway you cut it..it's runing boost for a longer period of time. That's got to add more stress and heat to an ALREADY TUNED UP BOOST. Does the wastegate operate in a partial open mode, or is it *all or none* (open and closed..no in between)? I was under the impression that the ECU can *modulate* the wastegate...feathering it so to speak.
Anyway..keep us informed...interesting for sure.

 

He's a tech, so he knows what he's doing.

 

damn that

 

Make sure you log and check for knock.

 

Yea..I figured he knows more than me. Just wanna learn something here.
Is the wastegate modulated at all? I know my 944Turbo had a *cycle valve* (solenoid) that contolled the waste gate with vacuum and since it was constantly *cycling vacuum* it did modulate the external wastegate which spring operated. I'm just wondering if the wastegate is either all open or all closed with no *in between*.