ImPuLsIvE

When using a Greddy Prospec-B Type II and an external wastegate (Tial/Greddy with top and bottom ports), how do you hook them up to the controller's solenoid?? The manual states to connect the pressure source (from the turbo) to the COM port on the solenoid, and the top part of the wastegate to the NC port on the solenoid. What about the bottom port on the wastegate? Do I let that vent to atmosphere?

So far the controller isn't working at keeping a steady boost pressure.. I go all the way up to 20psi where my ECU performs a fuel cut (for safety reasons).

Settings on the controller are as follows:

Set = 30%
Gain = 5%
SetGain = 10psi
Warning = 15psi
Limiter = 26%

ImPuLsIvE

8+ views and no replies?

C'mon fellas.

boostedb20z

iTrader: (1)

leave the bottom one open

TheShodan

iTrader: (14)

You can go from the turbo itself, but you'll get a better source by putting the side port to NC, and the top port to COM. make sure that the hose going into the controller itself doesn't have too many tee's off. Throw up your gain a bit by a couple % points, and your set gain by about 2psi or so. You have to slowly get to the pressure you want by using the Set and Gain feature to be a little closer together. Get them too close and you'll spike a bit.

dpetro1

1.Tial bottom port --> compressor housing
2.Tial top port --> COM
3. NC --> tee into line 1

so essentially the side port and NC port go to the same place (a pressure source) so just tee them together.

also put setgain at 0 until you get the desired boost and consistency, then increase setgain as much as high as possible without spiking.

ImPuLsIvE

What's the draw-back of leaving the bottom port open vs. tying it into the compressor housing line?

Sorry for the newb questions, but I was used to a Turbosmart eBoost 2 controller and this is completely different.

TheShodan

iTrader: (14)

See. Not all compressor cover has a fitting on there. Some put one there, most of the cars and turbos I make don't. this is why the alternative method can be used. dpetro uses set gain to change the response of the boost controller to get boost to certain level. most use simply the SET percentage to do that, and use the Set Gain to "fine tune" the responsiveness of the controller. both methods work to get the desired boost level, but gain has to go down a little if using a dumptube vs a recirculated dump.

Both NC and COM have to be connected in order for this controller to work, bottom line.

dpetro1

you can NEVER leave the bottom port of the wastegate open. whether you are using a ebc or not the side port must be connected to a pressure source, if not the car will just build boost and the wastegate will not open (symptom you are having now). follow my directions and it will work fine. i can bust out some MS Paint skills if needed

dpetro1

maybe i was being unclear but for me

SET - adjust boost pressure
GAIN - adjust consistancy (creep or boost falling off)
SET GAIN - increase spool

i say to leave SET GAIN at 0 to start to avoid spiking issues. once boost is dialed in and consistant then crank the SET GAIN to increase spool (not increase boost). SET GAIN should not really have any effect on SET or GAIN individually. if boost spikes then turn it down, do not adjust the other settings.

damn profec b2 can be a PITA to learn, but i really liked it after getting to know it better

TheShodan

iTrader: (14)

I know what you said.. we're saying the same thing dpetro.. I said SET GAIN for Boost "RESPONSE" (Spool).. You know how I hate that word.... Set gain should be used last after the SET adjustment is close to where the person wants boost to beat.

dpetro1

ok so we are on the same page.

ImPuLsIvE

Alright, I did as instructed and mounted the pressure lines (from compressor and WG side port) to the NC port, and the top of the WG to the COM port. Now, I've set all the settings to give me 14psi. For some reason I always exceed that setting regardless of the 'low' or 'high' profile.

Why can't it go up to a certain pressure and stay there? I know my manual TurboXS controller does this just fine.

dpetro1

what exact settings are you using? does boost just continue to increase infinitely or is it stopping at a certain point?

do you have both the side port of wastegate and NC port going to the compressor housing? can you take a picture or make a drawing of you current setup?

ImPuLsIvE

Compressor: ________________---------------------------- NC port
Bottom WG: ________________^
Top WG: _________________________________________ COM port

Settings are:

Set = 30%
Gain = 5%
SetGain = 10psi
Warning = 15psi
Limiter = 26%

^
That should be giving me 14psi. And the boost keeps building, never stabilizes to a certain point, all the way to 20psi.

I know my TurboXS manual boost controller lets the turbo spool up and settles at whatever setting I have it on and stays there.

This is my 2nd EBC that's done this (had a turbosmart eboost2 that I thought was defectice).. wtf??

TheShodan

iTrader: (14)

Change your setgain down a little, to get to the desired boost. I'll see what settings I have on the other car this week.

dpetro1

lines look good.

why do you think that should be giving 14psi? what wastegate spring do you have? turn down the SET to 15 or 20 and see what happens.

ImPuLsIvE

^

Did that. I even put the SET down to 0 to see what would happen and it's the same result.

The WG has an 11psi spring.

dpetro1

if you put the SET at 0 then you should get wastegate pressure. there is something wrong.

if you disconnect the EBC what happens? (just a line from side port to comp housing), maybe the wastegate diaphragm is torn or something

TURBODC4TEG

sorry to ask i searched and read this thread. do u leave the NO port open or leave the plastic cap that came with in. i hook up everything correctly just didn't know about the NO port since it didn't say in the manual. thanks

TheShodan

iTrader: (14)

I believe we kept that cap on with that port

TURBODC4TEG

anyway to know for sure? should i just leave the plug in there or take it out? would it affect anything? thanks

honda_teggy

b/s!! bottom port of wasstegate can be left open and will not be a problem! i had it that way on my car. MY TUNER DID IT THAT WAY! AND I TRUST HE WOULD KNOW. my car never once ever failed on me at all!

TURBODC4TEG

any info on plugging the no port or leaving it unplugged?

TheShodan

iTrader: (14)

Labor day weekend... we're not at the shop till tuesday. Go relax this weekend, and enjoy yourself a bit not worrying about it for a day or so.. ;-)

dpetro1

mine was always left open for the 2 years i had the profec2. i dont think it matters since the port isnt being utilized with an external wastegate setup