my friend is running a front mounted gtx42r with dual 44mm Tial wastegates with 13lb springs in it with 2 hondata BBG solenoids and s300. When he went to go tune, they cant get any less than 30lbs of boost...anyone know what the issue can be?

 

We need more info than that before we can help you.

 

What else would you like to know?

 

how are the wg's lined?

 

what does it do without the boost solenoid on?

 

The first step is verifying the solenoid is plumbed correctly by verifying yourself if the solenoid ports flow correctly. With the solenoid off (unplugged) the ports connecting the boost source to the lower wg port should be free flowing.

 

plumbed per this diagram...only difference is there are 2 wastegates which are plumbed in parallel

 

Have you verified the solenoid works?

 

Dont just blindly match port numbers up off a diagram. Verify the ports in question are open/closed like they should be in the off position by blowing through those ports.

 

Please elaborate...

 

Both solenoids are the same so this test will be the same for both:
-With the solenoid deactivated (unplugged) blowing into port 1 should be blocked. And ports 2-3 should blow through.
-With the solenoid activated (touch wires to battery) blowing into ports 3 should be blocked. And ports 1-2 should blow through.

You have to really understand how it works and why you are plumbing it that way.
Its a valve. Its switching between sending the boost reference from the bottom port (opening wg) to the top port (closing wg).
Boost reference to the bottom port should always be open when the ebc is deactivated to allow for minimum boost control (wg spring).
As the solenoid is activated (duty increases) the boost reference is switched more from the bottom port to the top port.
The amount of duty required depends on the wastegate spring.

 

using Tial gates? make sure you have the plugs in the open "air" ports

 

thanks muckman...it is just so hard to find the correct diagram or detailed information regarding how to plumb 2 solenoids with dual wastegates. Talked to Hondata and they dont even know how to do it...LOL

who here is running (2) 3 port solenoids with dual wastegates?

 

**** still does not work after trying the above suggestions...tested 3 solenoids and they all work but doesnt seem to work on his setup...tried dual solenoids T'd, dual solenoids to each wastegate and single solenoid to both wastegates...

I read somewhere that once ignition is on, it should click and when car is on it should be buzzing....is that correct? are there any settings i have to set in the Smanager?

 

Did you test the plumbing and ports exactly like I stated?

Regarding the buzzing, with the ignition On set Hondata to Fixed Duty cycle. Set it to 0%. Open up the Display and look at PWM output, it should also state 0%. Do you hear the solenoid buzzing? If yes you need to invert the solenoid under the "Solenoid Configuration". If its not buzzing increase Fixed Duty to 50% then verify the Pwm gauge confirms the same output and listen to the solenoid. Then try 100%. If its doesn't buzz then you have a wiring/ecu problem. Buzzing frequency should increase with duty cycle.

However even if the solenoids do not activate you should only get wastegate spring boost (fail-safe). If you are still over boosting then that tells me you still have a plumbing problem.

 

Have you removed BBG all together and just ran lines to the bottom of the WG's to obtain the 13 psi ?

 

Yup we tested it just like u stated...we will try to play around with the settings in SManager and update you

 

yea we did that...we connected it to a manual boost controller also and it works without any issues.

 

try just running one solenoid to the top of the wastegates

Is this on V2 s300 ?Since i switched to V2 s300 i had to select invert input on a normally closed solenoid. as we decreased duty cycle we got more boost out of it. after the invert problem was corrected. This was only when doing boost by gear. When doing fixed duty cycle it would be normal. This is also on a single solenoid setup. Two different cars same issue

 

bought a 4 port Mac valve instead and now it works perfectly...really weird...