I have a FD with a T78 kit and using Microtech LTX8 for EMS and all the other goodies. Would a manual boost controller be safe to run on my setup or screw the MBC and go with the EBC?? Also which MBC is best recommended??
I searched already

 

Anybody, I mean is a boost controller really necessary if I dont plan on moving my boost levels at all since it will be tuned throught the microtech ECU...

 

Well, it depends. Why do you even want a boost controller if you aren't planning on changing the boost level? If you are content with it being at what the wastegate is set at, then a boost controller isn't a must. There are certain advantages to having an ebc (see https://www.rx7club.com/single-turbo-rx-7s-23/electronic-boost-controller-%3D-less-lag-725050/ ). I prefer an ebc as opposed to a mbc, but a lot of that has to do with the fact that on most of my cars I run a low/high boost setup and I like the functions that an ebc can perform. I guess you need to explain what the reason is you want a boost controller.

Joe

 

yeah I read through that thread before and it was really helpful. If I have EBC and adjust my boost settings will the tuned ECU allow that or would it only stay at the tuned settings????

 

Your ECU will need to be tuned for each boost setting. Say your spring is 10 psi and you take it to a tuner just running on the spring and all he's able to tune is up to 10 psi then later you put a controller on there and crank the boost up to 15 psi, you're not going to know if the tune is accurate at that boost level without going back to the tuner first.

If you install the controller first then go to the tuner and tell him you need two boost levels setup then you'll be good to go right from the start. The ECU will automatically compensate for the added boost.

 

As to whether a MBC is "safe" is another question. I want to start off by saying that I've never run a MBC. I've only run EBC's, so I can't speak from first hand knowledge. However, from what I've read and my friends' experiences, I've heard that MBC's can have issues with boost spikes. I know there have been threads discussing this and people disagree as to how safe they are. I prefer EBC's because of the adjustability and other functions that I get (like low/high, boost warning and limiter, gear specific boost levels with the avc-r, etc.). You don't get that with a MBC. I also feel like they are more precise because of their adjustability and safer in general. As I said before, if you aren't going to be changing the boost level from what the wastegate is set at, then a boost controller is not a "must have."

Joe

 

In my opinion, if you dont plan on changing your boost level, meaning you are happy with you 10psi or whatever you wastegate spring is set at then you dont one an EBC. But if you want a harder/quick spool (not earlier) then a EBC can definately help. But that would be the only reason to get one in that case, unless you get like a Profec E-01 which you can use to log or AVCR which both you can use to tune how you boost comes on and can maintiain it thru the rev range if you want without drop off.

But in regards o the tuning issue. The way I see it is if you make your tuner tune your car t just 10psi, then maybe you are short changing yourself. Because if you are using the mircotech in either the 2D or 3D/matrix modes, you can it tuned for a higher boost than 10psi and it will also take care of the 10 psi. Lets say 13psi is a safe limit of boost based on your pump gas in your area. If you tuner tunes your map for a safe 13 psi, then everything from vaccumm up to 13 psi should also be in the safe zone. so if you have a EBC you can run 10 psi around town and if you see and interesting dog fight you can 13psi and yield more power and be victorious, turn it back off and go back to 10psi when you finished, save on your gas and tires.

With the matrix mode and even 2d modes there are boost points on the maps that go up 20psi i think. So your tuner can tune you car all the way up that and anything below that is safe. yes I know you car wont see 20 psi, so how can he tune it?..well my philosophy is that i still tune it very rich above where my personal point, so that if **** happens and the boost goes over it will not lean out, it will just dump gas in the chamber and flood worst case. So i f you tune your car to 13psi, cuz thats where you dont plan to exceed, dont stop the tune there, add in fuel for 14, 16, 18 and even 20psi. make them hella rich, so if you end going there for whatever reason you dont lean out and blow your motor.

Thats my theory on tunning beyond your boost point, i dunno if thats universally acceptable or if its practised of if there is still a downside to do that, some other way to screw your motor. The experts among us may have some input here, if they care to comment.

 

Oh as for the MBC being safe, yes providing its a quality MBC and not a home bitch up kit with the wrong concept, which just make the boost spike rather than maintain a boost. but if you dont plan on going higher than the wastegate spring pressure then it serves no purpose. And if you do decide to go higher than the wastegate spring pressure, then you still have the slow spool similar to wastegate only because MBC use the same spring opening concept

 

Thanks for all the info I really appreciate it. I was just worried that I couldnt run my car at all without a boost controller but with proper tuning it should run fine especially since I have the stock WG spring also I havent even broke in my motor so I can still hold on the boost controller until then so I can get it dyno tuned. I dont know if I will ever see past 20 psi but I have plenty of fuel to do so if needed. (850cc/1600cc inj) along with all the other mods. So EBC is the way to go, is a Profec B Spec II good enough?

 

I had a MBC on my old FD. Just one setting (28lbs) on the street.

 

Only LOLOLOL
WOW why so much???

 

28lbs everyday? what kinda gas were you running? AI i assume was a part of the setup..still alot of boost.. What kinda power was that.

 

yes it is. Is the spec II the one with the fuzzy logic? I've heard ppl complain about the fuzzy logic on them, I didn't get the details though.

 

all day, every day. I ran C16............ it put down a tad bit over 600 to the ground but it was just a little streetport.

 

Thats nice. You used to drive around on the streets on C16 all the time? Expensive grocery getting. Did you used to drive that car on the streets?