In theory, that's what a boost controller does. It maintains the boost at a certain predetermined level regardless of what other mods that you mentioned above are put in.

Now, there are certain arguments with regards to which BC's are better - manual or electronic.

What I plan to do is:

First, remove the restrictor pill, that's a free mod and plus it looks like Mitsu techline is recommending this as a fix for low boost.

Second, when I have enough money saved up, do an electronic BC and an aftermarket BOV. I think the EBC is better because it has it's own stepping motor to control the wastegate. Manual BC's are a cost-alternative solution but for me, I prefer waiting for an EBC.

Brent

 

let me clarify the tech line fix when i fixed the boost problems i also replaced both vaccum hose with the same hole diameter but thicker more stout outer wall (3m hose). these hoses were colapsing when getting hot. meaning the hose from the solenoid to the intake boot was being sucked close causing positive press. holding the wastgate open not allowing the car to boost properly. you should also replace both hoses from the solenoid to the vaccum tee and the one to the intake. hope i dont get in trouble?

 

Hey mitsupwr,

Do you think removing the restrictor pill will make this collapsing hose phenomena worse since the pill may ACTUALLY help to keep the hose from collapsing at the solenoid side?

Brent

 

Damn, Dr Evo!!!! So, please respond to this, with my clamp tightening, the "intake" or lack thereof on your car and the pill removal; still basically stock you gained ~5mph and knocked 6 tenths off your 1/4 with no $ spent, you should be proud of that my friend. Many people spend 1-2 grand for those gains. If I remember correctly this is all you did, right? What helped you the most? Also, how did you do your homemade intake and does it seem to filter air well? Did you leave the ram air snorkel in or take it off. If these three things are all you did, I only need to remove the pill and fabricate my intake with your help and get some great times, this is wonderful news. A 13.1 @102.5 is a smoking time on a basically stock evo and your 60 foot times are not crazy fast, so if you can get a low 1.7, you may achieve that 12.9x you are looking for w/out the spraying of nitrous on the outside of the intercooler. Just go on a cooler less humid night that should help. Again, I am glad so many tried the clamp tightening with positive results I knew I stumbled onto something free and fun, hope to hear from you guys soon.
Stay safe,
Punisher

 

oops, looked at your timeslip again, it is hard to tell if that is a1.6x or a1.8x due to picture clarity on the last launch if it is a 1.6x that is a great 60', maybe you can explain your launch technique revs held or "pumping" the gas pedal, what rpms. agressive slip or almost a dump etc... Also your 104.x mph is crazy fast as well, your car is running strong. This forum is the best guys, we are lucky to have such resources as to gain knowledge and horsepower for free.
Stay safe,
Punisher

 

An important question when putting the pill back in, does the small cone side face towards or away from the Solinoid??

 

the best thing to do is keep the stock hoses and just put the 2 new hoses on, and no i dont think it would make it more liable for the hose problem unless you allready have it.

 

come on, someone must know if this is fine to do with a reflashed ECU??? shold i just assume so?? hrmm probably not hehe

 

If you had a custom flash done, I would think any change to your car would offset the flash some. Maybe not too much, but it'll still off-set it, since the flash is so honed to your car.

 

hmmm, maybe that mitsu mechanic can answer this, is spool up slower without the pill in below 4000 rpm as Dr. Evo feels his is? Also, I may get 2 new lines this weekend to try this out, can you tell me the length and diameter hose (interior hole size and overall hose diameter) I will need to do this. Also, is it hard to remove the stock air box? Description of the easiest method would be good. I like the mechanics idea of all new hoses, because if you don't like it or want to bring it in to mitsu, you just swap hoses. By the way I did something crazy and tightened all of the clamps, just to be safe and they could all use a little snugging up! I don't think they were problems like the original plastic/rubber connection; however it doesn't hurt anything.
Take care,
Punisher

 

Restrictor removal, homemade intake and tightened the BOV clamps.

If you look back at some of my posts on this thread, you'll see the home made intake.

 

I believe the smaller side of the pill faces the BCS. That's how mine was before I took it out.

 

so replace the hoses from the T and keep the hoses to the wastegate??

I don't get it,

 

Hmm, Dr. Evo, tell me how you made the intake. Where did you get the parts and what did you get? Also, no air snorkel or yes? Congrats on the time, that improvement is ridiculous. Do you still feel the turbo does not spool as fast without the restrictor?

 

Interesting statement.

Kinda makes me wonder if the reason I feel like below 4000 rpm's there is a little bit more "lag" is probably because of the spike of the turbo (probably around 22-24psi from what I'm reading here) causes the line to suddenly collapse or "suck in" and then as the BCS cuts the boost down the collapsing of the vacuum line stops or is not as much.

I'm not positive on this. Can anyone chime in with their take on this?