Linemonkey
Member
Thanks a lot. I don't know how I missed thatderfdog15 said:
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tial wastegate for charge piping
- Thread starter ajpturbo
- Start date
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BOT,BOT_ROCKET said:
How did your install turn out? I was looking at those exact parts myself. I am keeping my eye open for WG options, and see a great many with that 2 bolt flange setup. The trick I am having is finding an adjustable one that goes to the pressures we need.
BOT_ROCKET
New member
lamrith said:
I ended up snagging SteelBlu's old tial, but I'm not going to install until: A) AJP gets the tuning kinks worked out for my car, and B) I get the full intake built and tuned.
Forgive me for not knowing as I am new to the SHO scene. Coming from a Nissan Juke Nismo RS. This is a whole different beast.
Question. Can you use a MBC with this motor?
If so and you want to stop Boost spiking. We solved this with a MBC. Last year while Dynoing. My Boost solenoid failed completely. During a pull mind you. Lets just say my tuner caught the over boost in time. 26psi(and it was still climbing) when he shut her down. So. We sourced another Solenoid at the Nissan dealer($60) and to prevent this from happening again. He plumbed a MBC in the boost circuit to act as a relief valve. The solenoid still controls the boost but the MBC is adjusted so it cannot go over a certain adjusted PSI. Set the Boost to 20psi and MBC to just a little over that and no more boost spikes. It works awesome.
I dont know if this idea can be used in this situation since there are two turbos etc. Its above my understanding of this engine at this point.
Question. Can you use a MBC with this motor?
If so and you want to stop Boost spiking. We solved this with a MBC. Last year while Dynoing. My Boost solenoid failed completely. During a pull mind you. Lets just say my tuner caught the over boost in time. 26psi(and it was still climbing) when he shut her down. So. We sourced another Solenoid at the Nissan dealer($60) and to prevent this from happening again. He plumbed a MBC in the boost circuit to act as a relief valve. The solenoid still controls the boost but the MBC is adjusted so it cannot go over a certain adjusted PSI. Set the Boost to 20psi and MBC to just a little over that and no more boost spikes. It works awesome.
I dont know if this idea can be used in this situation since there are two turbos etc. Its above my understanding of this engine at this point.
Vortech347
New member
Dumb question after reading through this. I understand how it makes fuel and boost control better but does it make an actual difference in ET/HP?
FoMoCoSHO said:
I would venture to say if anything, it might lower peak hp/tq since your not dealing with those big spikes anymore... but it would create a smoother torque/HP curve....
There are a couple dynos with and without it...
AJP turbo said:
Yup, smoother power band... less peaks and valleys on a dyno sheet...
Open throttle vs throttle controlled load has been proven to increase power on the Ford Focus.
Brad tunes for it, so he would be the best to fill you in. But from what I can tell... it's a balancing act between boost, IATs, and wastegate duty cycle...
Brewineer said:I used an ebay 38mm wastegate from E Motor USA, it was only $70 with a dump tube! I swapped in a lighter spring so I could use an MBC to dial in the wastegate to just catch the boost spikes without having to find the exact combination of springs to work with the tune.
That may be giving you the result that you are trying to achieve but a problem with that, depending on where you are getting your boost reference, is that you are bleeding off the boost reference when using a manual boost controller. And the wastegates duty cycles are dependant on how much signal is coming in and out of the solenoids
Which is why some people may think the wastegates mod makes the car run hotter or makes the turbos run harder due to seeing higher wastegates duties ...
There really is no way it would make things run harder or hotter unless you have a spring pressure too low or bleeding excessive boost reference and affecting what is going in and out of the solenoids
It really was meant to be a simple passive setup
Think of the boost reference line that goes in and out of the boost solenoids as being metered air....you don’t want to lose any of it
I installed it last night!
I had tested the system with a bike pump to see that it was actuating correctly and changing with the MBC adjustments. I ended up plugging the bleed port on the MBC and got the boost reference right at the 3-port.
At First it was set too low and was a reliable boost leak at 10 PSI, and then turned it up to start opening around 12 PSI. I will tinker with it a bit more today. I may end up installing the 14 PSI springs and not mess with the MBC as the commanded boost is 12 PSI (I'd better double check).
I had tested the system with a bike pump to see that it was actuating correctly and changing with the MBC adjustments. I ended up plugging the bleed port on the MBC and got the boost reference right at the 3-port.
At First it was set too low and was a reliable boost leak at 10 PSI, and then turned it up to start opening around 12 PSI. I will tinker with it a bit more today. I may end up installing the 14 PSI springs and not mess with the MBC as the commanded boost is 12 PSI (I'd better double check).
Brewineer said:
Yeah buddy I would try that...look at your “dsd tip” and put a spring rates for 2 psi higher ...remember wastegates generally “crack” a bit lower than their spring rating .
If your desired tip is less than 190 kpa then a 14 psi spring should work...if you are 190 kpa or more then the 14 isn’t high enough...just roughing that in my head at the moment
Being as someone who had this modification... and added a MBC...just put the correct springs in it and ditch the MBC...
You will never quit tinkering with it... you get it set right and then a week or so later it needs an adjustment... I think it drove Brad nuts..
You will never quit tinkering with it... you get it set right and then a week or so later it needs an adjustment... I think it drove Brad nuts..