I decide to toy with my car once again tonight. First off my boost controller really sucks? It's a MBC that you fiddle with in the car. Anyways since i freed up my exhaust, i really dont think it serves a purpose since my boost creeps up to 10 by 5k rpm no matter what. But here's the kicker. Probably since my engine is cold when i first start it boost hits an 8.5 psi max and it revs fine past 5k. Then it warms up and i creep to 10 by 5k rpms in any gear. But usually with an MBC over stock boost feels like more of a kick in the pants instead of just a slow rise which it does now. 3k i have 5 psi, 4k i have 7, then 5k i have 10. Anyways si o decide to tighten the adjuster thing all the way down for kicks. Boost shoots way past 10, i'm like whoa, let off no damage done but shouldnt there have been fuel cut? I didnt notice any sort of let off. I'm completely baffled as to what's going on.

first: dont boost / rev when engine is cold



second: GET A ******* FCD!!!! THERES NO WAY TO BEAT THE SYSTEM!





unless you get a stand alone ecu that bypasses the stock fuel cut... YOU NEED A FCD



either get a fcd or stop bitching about the problem...you ask so many times...and this is the answer like many others have told you russ

Well, other than the FCD thing though. Why does my car go past 10 psi without it shutting down? And do all boost controlllers act like this? When my friend put one in his 944T there was a huge difference, with the one i have now all i know is that i leave the knob pretty much open and when i tighten it down boost goes past 10 psi but it still doesnt build any faster.

your boost controller just regulates boost



it will not give a different feeling



its the turbo that feels diff







tightening the spring also will give more boost....

Well the mbc my friend got for his car it keeps the wastegate shut until peak boost is built, versus the stock one that just lets it build slowly. Like it just BAM shoots to 10 psi then he hits peak 14 way faster than before. I also read on scott89t2's website that he noticed boost building much quicker after the boost controller install.



Lastly, i'm still not sure why i'm hitting 10 psi. My car isnt that modded all i have is dp/mp, i'm still running stock catback and stock TID. I also have a mildly ported wastegate. So shouldnt boost stay down even without any sort of boost control?

with no cats you have NO RESTRICTIONS in your exhaust....



thats just how it is





either put your cats back on....or get a FCD



and clean ur injectors

What about that part?





And my car still did the 5k hesistation WHEN I HAD CATS!!!



I still dont see how i could be hitting 10psi with both cats intact, stock catback and stock TID with just a cone filter slapped on.

well again...like i said from the beginning...i dont think its fuel cut....i think your injectors suck!





fuel cut isnt like... you hit it and when its normal again it stops fuel cut..



fuel cut will cut fuel and make the car run like ****...you gotta reset the car basically by turning it off and back on



its not a 5k hesitation







what your problem is, i think at least, is that at 5k the amount of fuel your car needs to inject isnt getting supplied due to clogged/dirty injectors..



meaning that it gets hesistant around that rpm



i dont think you should overcomplicate yourself with too many problems at once..... seriously...you have like 3...all elevating from one main problem...fix the first at hand, and work from there...

i have an fcd that i'll sell ya for cheap..

take the MBC out of the interior, long lines will cause boost creep as well, and it takes away the urge to reach down and turn it up in a race. shorten the lines and I bet you notice a difference.

first if you're not hitting fuel cut by 10psi it might already have an fcd, or thats your 5k hesitation.



second, my t2 was hitting 13psi on a cold night with a hollow precat and an intake, so you with less restriction should be at 10psi no problem

he told me the BPS goes right to the harness...no FCD box



so im using the assumption from what he told me

it might be a chipped ecu too

Anyway to check any of this? Though i doubt i have a chipped ECU.

ok boost controllers:



Manual boost controllers only adjust the amount of air pressure getting to the wastegate actuator, they dont physically hold the wastegate shut or anything.



The reason "boost builds quicker" is because the WG isn't seeing any pressure if the restriction/knob is in far. You can see this in action by disconnectnig your WG, your boost will build super quickly.



A boost controller cannot lower boost, if your boost controller is at it's lowest possible setting and you're still reaching 10psi, it's because your setup's lowest boost is 10psi due to no restrictions etc etc. I sold my MBC to frestyle for that reason my lowest boost is my safest boost (altho technically not safe for my fuel system) so a line straight to the WG is in effect the same as me leaving the MBC wide open, which is what i was doing.



You seriously need to pay attention here ok?



TO SAVE THE MOST MONEY:

1) Take on each problem one at a time starting with the one that has the fewest different approaches. This would be your injectors, get them cleaned ocne cleaned yuo dont have to question them. Check your fuel filter, disconnect and remove it blow through it, if it is easy to blow through its good, if it is restricted in any way it is causing a problem, replace it. Then check your fuel pump, i cant rememebr if you have aftermarket or not. Check it's gettnig proper voltage and that it is indeed pumping gas.



Now while your injectors are getting cleaned check your ecu, if it's chipped there'll be an aftermarket company's name on the ecu, such as "panspeed" but i doubt it's chipped, so get an FCD, bigturbo just offered you one, and they normally run about $20 used.



Bam your fuel system is now running as good as you can make it run. So the fuel delivery is now cleared, all for about $160 total. That $160 may seem like a lot but it removes all doubt from your mind that fuel is getting to your engine.



In "cliff notes" form, stop being a lazy ass bad car owner and take care of your car by taking the required and appropriate steps. It's obvious the exhaust restrictions were not your problem, so move on to the next step, your fuel delivery system.



case closed.



kevin.

i give kevin's post an a+ with 3 gold stars.

Thanks, i was getting tired of reading the same thing everyday so i summed it all up in one, unoffensive, post.



Hopefully my advice is taken and used instead of skimmed and ignored.



kevin.

This was a thread about my boost. Not my 5k hesistation. JUST TO FREAKING CLARIFY MY POSTS ARE ABOUT DIFFERENT PROBLEMS!!

I assume you no longer want my advice, then, fine consider my advice removed and no longer accessible.



kevin.

It was to clarify for everyone saying that i made 5 identical posts.