Boost controller/gauge worth it?

[Nashiva]

I managed to get the largest paycheck of my life, and would like to pour a little more into my car. From what I hear, it's possible to get much more out of your t25 with a boost controller, is that so? I haven't been able to find much info on it anywhere else. Of course with a boost controller I would need a boost gauge too, thus the title of this thread. Any advice would help.

 

[DSMcrazy3]

If you're looking for a much larger amount of boost, you may want to look into a 14B conversion...They're stronger turbos, but your spool up time will suffer..

Josh

 

[ArticNemesis]

You can't really modify the car without a boost controller & boost gauge. Adding boost is the basis for making big power. They are great first modifications.

Just don't try pushing past 15psi on stock fuel components or tuning devices, or you will be asking for trouble. Also the stock 2g BOV isn't going to very much boost, so you will have to upgrade that at some point and time also.

Also, the T25 is going to fall flat on it's face past 5000RPMS.

http://www.dsmtuners.com/tuning-guide/2gturbo/stage1power.php is the path for you to make power.

 

[DurangoGS-T]

if you do decide to get something, make sure you get a gauge with the MBC you choose. also make sure you tap it in the right spot...i tapped mine after the BOV and any pressure i was pushing with the turbo was leaking off through the BOV before it was read by the gauge. essentially i was attempting to run 30psi or so with the stock turbo but only saw it as 10ish. so with my new joep style MBC i managed to blow my t25...on the bright side though i got a 14b now so it depends on how you look at it.

 

[SethA]

Your profile says you already have a boost controller but obviously that isn't the case. If the rest of your profile is correct a boost controller and a gauge would be a good next step. Do you have a cat back yet? That might make more sense.

As stated above, you need a logger and fuel injectors with a way to control them before you turn up the boost too much. Rewire your stock fuel pump for a small level of cheap insurance right now.

The real fun will begin when you get a bigger turbo (and supporting mods).

Seth

 

[beat90tsi]

MBC and gauge are the beginning of the end.
Your car will soon become a total project.

Yes it's fun, but proceed with caution.

 

[dalatinromeo]

I managed to get the largest paycheck of my life, and would like to pour a little more into my car. From what I hear, it's possible to get much more out of your t25 with a boost controller, is that so? I haven't been able to find much info on it anywhere else. Of course with a boost controller I would need a boost gauge too, thus the title of this thread. Any advice would help.

Yes it is possible to get much more. You should definetly get the boost gauge. Get one that measures boost/vaccum. If those are your only mods only increase to 12 psi to be on the safe side, just into your get other mods. Have fun modding

 

[ddavisaf]

If you're looking for a much larger amount of boost, you may want to look into a 14B conversion...They're stronger turbos, but your spool up time will suffer..

Josh

spool up time not suffer. Not unless you're counting 10's of rpms...

Before you think about anything you need to get a boost gauge on your car.
Then as everyone else suggested, whether or not they typed it, follow the upgrade path.
http://www.dsmtuners.com/tuning-guide/2gturbo/stage1power.php

Don't mess with boost anything until you get a gauge in there first.

 

[jim97gst]

If those are your only mods only increase to 12 psi to be on the safe side

The factory manual states that the boost pressure should read between 6.4 and 14.7 psi. If Mitsubishi is expecting it to go as high as 14.7 psi, why would you recommend he not go at least that high? The car runs rich from the factory, and the stock turbo is not capable of flowing that much air, especially at high RPM. I have no boost controller, and spike to 20 psi at low RPM, and then settle at 16 or so psi. Logs show that everything is fine. I have a 190 lph FP and 650 cc injectors now, but only in preparation for an evo3 16G. I have been running with the stock fuel system at those boost levels for over 2 years, and the car runs just dandy.

 

[dalatinromeo]

The factory manual states that the boost pressure should read between 6.4 and 14.7 psi. If Mitsubishi is expecting it to go as high as 14.7 psi, why would you recommend he not go at least that high? The car runs rich from the factory, and the stock turbo is not capable of flowing that much air, especially at high RPM. I have no boost controller, and spike to 20 psi at low RPM, and then settle at 16 or so psi. Logs show that everything is fine. I have a 190 lph FP and 650 cc injectors now, but only in preparation for an evo3 16G. I have been running with the stock fuel system at those boost levels for over 2 years, and the car runs just dandy.

So what you are saying he should increase his boost to 15 psi without the lack of fuel mods( like you already have fuel pump, injectors, or at least a rewiring of your fuel pump) let alone an exhaust. Why increase your boost without all your restrictions and lack of fuel support?

The only part of my statement I would change is get a logger, and if everything looks fine boost away. Just not pass 15 psi.

 

[gixrman]

You could remove the BCS restrictor for a few more #'s of boost and be safe.

 

[jim97gst]

without the lack of fuel mods

Your double negatives are confusing me. Does this mean WITH fuel mods?

Why increase your boost without all your restrictions and lack of fuel support?

Again, did you mean WITH restrictions?

For one thing, some cars run 15 psi from the factory. Mine did. The first thing I added to the car was a boost gauge, and it read 15 psi. As I said before, Mitsubishi is expecting it to be as high as 14.7 psi from the factory, and have designed the fuel system to handle that. They also expect things to go wrong sometimes, and add it a factor of safety (i.e. running a little rich, even when at 15 psi).

Increasing boost will make more power, that's why you want to do it. And you don't need any additional modifications if you are within factory specifications (which is more than 12 psi). As I've shown with my car, you can go beyond the factory spec of 15 psi and still be good on fuel (as I said before, this was done on my car for 2+ years with stock pump, injectors, and no rewire). Although I do agree that a logger should be at the top of the list before you get too far to make sure your particular car is OK with this as well.

 

[Turbo Talon DL]

I very VERY ACCIDENTLY ran 20psi on my 14b. Since I have a Starion FMIC, it was probably more like 22psi. The starion has about a 2psi pressure drop The car pulled really REALLY hard till I let off the gas, about a split second later. Killed the turbo too. Make sure you read your spark plugs as well, and run some good octane booster along with whatever recipe you choose to use.

 

[JiggahMan]

I managed to get the largest paycheck of my life, and would like to pour a little more into my car. From what I hear, it's possible to get much more out of your t25 with a boost controller, is that so? I haven't been able to find much info on it anywhere else. Of course with a boost controller I would need a boost gauge too, thus the title of this thread. Any advice would help.

I beat an 02 Mustang with a cat-back exhaust and boost controller

I very VERY ACCIDENTLY ran 20psi on my 14b. Since I have a Starion FMIC, it was probably more like 22psi. The starion has about a 2psi pressure drop The car pulled really REALLY hard till I let off the gas, about a split second later. Killed the turbo too. Make sure you read your spark plugs as well, and run some good octane booster along with whatever recipe you choose to use.

I ran 20 psi on stock SMIC and stock injectors w/ no AFC or AFPR... Blew the combustion chamber apart on the head on the 1-2 cylinders.

 

[ddavisaf]

So many weird and mixed answers.... it's confusing me!!

Stock fuel, stock exhaust, you can run a max of 17 psi safely. Don't try and squeeze every .2 psi out of your car though. Set it to 15 with a mbc or ebc and leave it alone until you upgrade more.

You can run 12 psi with your eyes closed, 15 all day long, 17 safely but watch for creeping and spikes as they can cause damage you won't want.
I run 14 psi with my 18G and no supporting mods just fine. An 18G is much stronger than a 14b.... TDO5H-14B-6CM2 405 CFM, my 18G is 600 cfm.

 

[dsmsucks]

So many weird and mixed answers.... it's confusing me!!

Stock fuel, stock exhaust, you can run a max of 17 psi safely. Don't try and squeeze every .2 psi out of your car though. Set it to 15 with a mbc or ebc and leave it alone until you upgrade more.

You can run 12 psi with your eyes closed, 15 all day long, 17 safely but watch for creeping and spikes as they can cause damage you won't want.
I run 14 psi with my 18G and no supporting mods just fine. An 18G is much stronger than a 14b.... TDO5H-14B-6CM2 405 CFM, my 18G is 600 cfm.

I wouldnt run 17 on stock setup, shit I wouldnt run 15. I ran 15psi on my car and I was lean. Some people would say run 15 but I wouldnt.
ps 14psi on a 18g aint shit. That might as well be a 14b

 

[daren_p]

What you need to do is upgrade the bov as the plastic 2g units leaks @ about 12 psi. If you add a mbc & turn up the boost past that you will be causing your turbo to work even harder because of the bov leak, causing it to fail pretty quickly as the t25 is to small for a large amount of boost. Once that is done rewire the fuel pump add the boost gauge & boost controller & set it between 15-16 psi (any higher then that and you'll just be making heat). This amount of boost is fine on the t25 (since by about 5000 rpms you will drop off to about 12 psi of boost, caused by the too small turbo), you will have more then enough fuel with a rewired pump (guys that are saying this could be too much boost are probably 1g's with 14b turbo's). Just to compare I could run my evoIII @ 15 psi on the stock fuel system (with a pump rewire) with no knock & the t25 doesn't flow anywares close to the same amount of air at that boost pressure.

 

[Turbo Talon DL]

I ran 20 psi on stock SMIC and stock injectors w/ no AFC or AFPR... Blew the combustion chamber apart on the head on the 1-2 cylinders.

Yeah, really? Blew the motor? Everything still runs fine for me, just waiting on new turbo. I wonder why my motor didnt blow apart? Would my forged internals and cams have something to do with it?

Good luck, well I should say, enjoy your car when you get it back on the road!!

 

[PieEyedPiper]

I very VERY ACCIDENTLY ran 20psi on my 14b. Since I have a Starion FMIC, it was probably more like 22psi. The starion has about a 2psi pressure drop The car pulled really REALLY hard till I let off the gas, about a split second later. Killed the turbo too. Make sure you read your spark plugs as well, and run some good octane booster along with whatever recipe you choose to use.

octane boosters? give me a break.

I'm sorry you busted up your turbo but advising people to purchase expensive fuel additives that don't do anything at all isn't nice. I would have to use half a tank of 91 octane and the other half of the tank filled with about 50 bottles of "octane boosters" to raise my octane level to 93.

 

[Superbeast406]

octane boosters? give me a break.

I'm sorry you busted up your turbo but advising people to purchase expensive fuel additives that don't do anything at all isn't nice. I would have to use half a tank of 91 octane and the other half of the tank filled with about 50 bottles of "octane boosters" to raise my octane level to 93.

Yeah, when the bottle says "boost octane level by 5 points", no one reads the fine print that says it takes like 12 points to get from 92 to 93 (estimating with 12, don't remember exactly).

 

[DGajre777]

Yeah, when the bottle says "boost octane level by 5 points", no one reads the fine print that says it takes like 12 points to get from 92 to 93 (estimating with 12, don't remember exactly).

WTF I thought when it said boosts octane level by 5 points it meant that if I put in 93 octane in my tank, the octane booster would boost it up to 98 octane.

 

[daren_p]

So what you are saying he should increase his boost to 15 psi without the lack of fuel mods( like you already have fuel pump, injectors, or at least a rewiring of your fuel pump) let alone an exhaust. Why increase your boost without all your restrictions and lack of fuel support?

The only part of my statement I would change is get a logger, and if everything looks fine boost away. Just not pass 15 psi.

With the stock tiny t25 turbo yes 15 psi is safe. I could run 15 psi on my evoIII with stock fuel pump just a rewire and that flowed 7 more lb/min of air (~70 hp) compared to the t25 at the same boost.

Boost gauge & mbc, set it at 13 until you upgrade the factory 2g plastic blow off valves as it leaks really easily and you will be working your turbo harder to compensate for the leaks, shortening it life alot. Rewire the fuel pump and turn that boost up to 15 or 16, any more then that and you will just be making heat with that turbo. Basically follow the upgrade paths that are listed on the different dsm webpages, free up that intake & exhaust.

Edit: Holly this post hasn't been up in a while, just realized I've already replyed with basically the same answer

 

[Defiant]

WTF I thought when it said boosts octane level by 5 points it meant that if I put in 93 octane in my tank, the octane booster would boost it up to 98 octane.

Precisely what they intend for you to believe. A "point" is 1/100, like a cent of a dollar. But who'd buy the crap if they realized they'd be hoping for one-half of one-percent octane boost?