I fully understand what you can do with a 3 port. The thing is, Why in the world would you want to run less boost in any area? I guess you keep tuning the way do and I will keep doing it the way I do. Seems to work well for both of us.



-Em

 

Why do you think it would have to spike any higher than 36 psi if you want to hold 36 psi? If its setup right it will not have to spike at all. It will run 36 psi all the way through. If its falling off due to pressure on the back side of the flapper than you have yet another issue that you need to fix. How many band aids can you put on one car before you consider it cobbed?


-Em

 

you can only do so much with a limited restricted factory hotside & a larger displacement engine.

 

Your graph makes me think you are trying to avoid TQ? Why avoid it at such a low number? 400 on the DLL is probably about 300-350 on our dyno. Its really not a lot at all. I would have run the extra boost when it came in and the car would have made much better power. Not that the power was bad in your graph, Just saying it could take a bit more than you are giving it.



-Em

 

heres the full detail to that car https://www.evolutionm.net/forums/9270700-post1.html

it was 93octane so the numbers it made was pretty good and only hks 272.

i couldnt run more boost downlow it would knock like hell. it didnt knock high rpm though with the more boost, so in that case i did something with the 3 port i couldn't do with mbc.

 

Did you ever figure out what caused the knock? Or just use the 3 port as a band aid?

-Em

 

theres is no bandaid.. and the knock was from running to much boost.. so i lowered it.. since the car was using a 3 port and i had the ability to raise boost wherever i wanted, i experimented with boost at higher RPM and it took the boost and made more power over timing.. its that simple.

 

I find this discussion between Teacup and Emery to be the utmost scholarly and interesting.

Wonderful discussion lads.

 

Yeah, I just looked at it. That's a lot of boost for 93. I can't believe it only made that much power with such high boost. Makes me think something else is wrong. I could be wrong but that would only be about 400-425 whp on my dyno. If a car can't make that at 30 PSI I would have stopped long before I made it to 36.

Back on topic though, I guess that's one reason you would want to use a 3 port. Good thing none of my customers will be running 36 psi on 93 oct. LOL


-Em

 

that car had an egt gauge and temps were in the safe zone.

the equation was not accurate in evoscan either, so the boost was inaccurate.

 

Sorry, I really don't want to sound or come off like I am arguing with you Tcomp. Like I said earlier, you do things your way and I do them my way. It works fine for both of us.


At the end of the day all that matters is that our customers are happy.



-Em

 

yes thats correct..


i think this threads informative.. a mbc has its place.. so does a 3 port.. thats why i dont see nothing wrong with combining them both together and using them both in some situations.

for a evo X i think ecu boost should be mandatory though given how fragile they are. Chad brought up a really important feature for the evo X that only ecu boost can do.

at the end of the day right now a hallman pro is sitting in my car.. and the grimmspeed is in my garage not in the car.. haven't tested both together yet on my car but intend to.. but the 3 port alone by itself in my car i hated. it smoothed the power hit to much.. i didnt get that kick in the *** like i do with a mbc.

so at the end of the day if i had only an option to run a 3 port or a mbc.. id choose the mbc.. so we are not that different after all. but if they both work together and i still get that kick in the *** feeling then ill run em both full time.

 

So you haven't ran the "hybrid" setup on your own car yet making comments as to how well it does?


Each has its place and application , and really just comes down to personal user/tuner prefference IMO.

 

no i haven't ran both at once yet on my personal evo..

however i have seen before & after what happens when you add the mbc with the 3 port.. it makes a rather large difference in spoolup and overall response time of the turbo vs just the 3 port itself.

and the owner was shocked also.. said the car felt way different.

his exact words were "This feels extremely fast and responsive now... heres the log"

but ya.. i cant say what it does and doesn't do until i test it on my car myself.. i haven't changed my setup in over 2 years so if somethings off i will know right away without even seeing logs.

ill report back when i test it on my evo to see if its the real deal or not.

heres another thread though of it;

https://www.evolutionm.net/forums/ev...cs-hybrid.html


================================

UPDATE: October 24th 2012 --

I have ran the hybrid boost setup i was referring to in this thread, and it works great. I will never run without the 3 port
again on my vehicle. I was given the ability to fine tune my mbc's boost curve with the 3 port.. giving me the best of
both worlds.

Depending on your turbo, hot parts, pressure drop and so forth, this setup may not benefit you at all if your turbo is big
enough to hold all the boost till redline.. but on stock frame units its awesome in my opinion.

here are 4 unique examples of it in action: 1 2 3 4

================================

UPDATE: March 08th 2013 --

The discussions being read in this thread are friendly debates regarding different types of tuning methods.
If anyone takes offense to anything I've said, i apologize in advance.

 

Bump.
I learned so much from this thread right before I am about to be tuned (likely by STM). I will go with what my tuner recommends, as has been pointed out pretty much everywhere. If a tuner is good with a MBC, it seems there is almost no difference, just fewer complications.