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Lancer Aftermarket Forced Induction Tech Discuss forced induction related specs and upgrades for custom aftermarket setups.

Going turbo but got some questions

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Old Dec 7, 2010 | 07:39 AM
  #16  
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Originally Posted by cedes14bamg
ohh thats from where those injectors come from !

are you serious, stock fuel pump ? jeese you were all about the tune !

a hard inlet pipe, the pipe for recirculation? so its possible to run rich with a recirculated bov?
no i mean the intake pipe itself, because that where the bov recircs back into. as for being rich not nearly as much as if you were to vta.
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Old Dec 7, 2010 | 09:52 AM
  #17  
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Originally Posted by JRR
no i mean the intake pipe itself, because that where the bov recircs back into. as for being rich not nearly as much as if you were to vta.
I run VTA, but i dont have stalling issues becuase i have auto trans, also when i boost i dont "normally" let off the gas because in an auto the TB plate wont close in between shifts, like a manual trans does, so i have no richness problems when running VTA, the only tme i let the BOV sound out is really just when i want to hear it!
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Old Dec 7, 2010 | 10:00 AM
  #18  
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Originally Posted by JRR
no i mean the intake pipe itself, because that where the bov recircs back into. as for being rich not nearly as much as if you were to vta.
alright
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Old Dec 7, 2010 | 10:03 AM
  #19  
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Originally Posted by Mitsu.kid.02
I run VTA, but i dont have stalling issues becuase i have auto trans, also when i boost i dont "normally" let off the gas because in an auto the TB plate wont close in between shifts, like a manual trans does, so i have no richness problems when running VTA, the only tme i let the BOV sound out is really just when i want to hear it!

yea but if i just add the washers supplied with the bov in it to stiffen up the spring can it help? cause im not auto
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Old Dec 7, 2010 | 01:19 PM
  #20  
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Originally Posted by cedes14bamg
yea but if i just add the washers supplied with the bov in it to stiffen up the spring can it help? cause im not auto
It depends, some will tell you to set the BOV just right, so that it's closed at idle, but still soft enough that it will open when you let off the gas....it's really not a set thing. It depends on where the BOV is located, how long the vac tube is, lots of different tiny things have an effect, and when you put them all together, it may or may not work perfectly depending on the car/person.

Best thing is to recirc, next to that is to run SD, next to that is just try to tune it up enough that it works. For the cost of a evo9 bov, it's just so easy to get one in there and not worry about if the issues you are having or bov related or not. I'm not saying you have issues...I'm saying once it's all put together, you want as few things to be able to go wrong as possible.
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Old Dec 7, 2010 | 04:27 PM
  #21  
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Originally Posted by HornstarBU
It depends, some will tell you to set the BOV just right, so that it's closed at idle, but still soft enough that it will open when you let off the gas....it's really not a set thing. It depends on where the BOV is located, how long the vac tube is, lots of different tiny things have an effect, and when you put them all together, it may or may not work perfectly depending on the car/person.

Best thing is to recirc, next to that is to run SD, next to that is just try to tune it up enough that it works. For the cost of a evo9 bov, it's just so easy to get one in there and not worry about if the issues you are having or bov related or not. I'm not saying you have issues...I'm saying once it's all put together, you want as few things to be able to go wrong as possible.
so if you have the bov closer to the throttle body youll have a weaker sound right? and how would the vaccum tube have an effect in it?

yea recirc is the best option
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Old Dec 7, 2010 | 06:22 PM
  #22  
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Originally Posted by cedes14bamg
so if you have the bov closer to the throttle body youll have a weaker sound right? and how would the vaccum tube have an effect in it?

yea recirc is the best option
Recirc is the best option mostly, espicially on a boosted lancer. I am able to get away with VTA withought running speed density setup, however its always an option. If your a manual, stick with recirc for now. Having the BOV or Diverter Valve closer to the TB doesnt matter, Once your at your specific PSI, the whole system from the turbo to the TB is under the same pressure, it should not matter sound wise. What do you mean the size of the vac tubing? do you mean as to having an effect on the sound of the BOV? Also this will not matter, vacuum is vacuum and boost is boost, having a smaller or larger vacuum size wont matter in the sound of the BOV. I think the common size is maybe 3/16th vac hose to the BOV

Last edited by Mitsu.kid.02; Dec 7, 2010 at 06:25 PM.
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Old Dec 7, 2010 | 07:06 PM
  #23  
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Originally Posted by Mitsu.kid.02
Recirc is the best option mostly, espicially on a boosted lancer. I am able to get away with VTA withought running speed density setup, however its always an option. If your a manual, stick with recirc for now. Having the BOV or Diverter Valve closer to the TB doesnt matter, Once your at your specific PSI, the whole system from the turbo to the TB is under the same pressure, it should not matter sound wise. What do you mean the size of the vac tubing? do you mean as to having an effect on the sound of the BOV? Also this will not matter, vacuum is vacuum and boost is boost, having a smaller or larger vacuum size wont matter in the sound of the BOV. I think the common size is maybe 3/16th vac hose to the BOV

oh so theres no pressure lost as the boost flows intercooler pipes? i dunno about vaccum tubing, i just wondered why that other dude said so.
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Old Dec 7, 2010 | 07:15 PM
  #24  
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Originally Posted by cedes14bamg
oh so theres no pressure lost as the boost flows intercooler pipes? i dunno about vaccum tubing, i just wondered why that other dude said so.
Well a general rule of thumb is about 1 PSI loss from the turbo to the TB, but 1 PSI will not a make a sufficiant sound difference in the way the BOV sounds My boost spikes to 7-8 initally but holds strong at 6 PSI through the whole pull, so its a 6 psi "BOV pressure" that 6PSI BOV pressure is still 6 PSI no matter where the BOV is placed, and by the time the TP closes unless you have a leak somewhere, the 1 PSI loss wont result in a sound difference, See what im saying?

Last edited by Mitsu.kid.02; Dec 7, 2010 at 07:18 PM.
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Old Dec 7, 2010 | 07:24 PM
  #25  
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[quote=Mitsu.kid.02;8896007]Well a general rule of thumb is about 1 PSI loss from the turbo to the TB, but 1 PSI will not a make a sufficiant sound difference in the way the BOV sounds My boost spikes to 7-8 initally but holds strong at 6 PSI through the whole pull, so its a 6 psi "BOV pressure" that 6PSI BOV pressure is still 6 PSI no matter where the BOV is placed, and by the time the TP closes unless you have a leak somewhere, the 1 PSI loss wont result in a sound difference, See what im saying?[/


but then if an fmu cant supply for over 7 pounds of boost, is it 7 pounds at TB or TURBO cause if its at TB then i guess i can run 8 psi on turbo? but yea it makes more sence that its at TB haha

and how is 6psi feeling?
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Old Dec 7, 2010 | 07:48 PM
  #26  
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[quote=cedes14bamg;8896032]
Originally Posted by Mitsu.kid.02
Well a general rule of thumb is about 1 PSI loss from the turbo to the TB, but 1 PSI will not a make a sufficiant sound difference in the way the BOV sounds My boost spikes to 7-8 initally but holds strong at 6 PSI through the whole pull, so its a 6 psi "BOV pressure" that 6PSI BOV pressure is still 6 PSI no matter where the BOV is placed, and by the time the TP closes unless you have a leak somewhere, the 1 PSI loss wont result in a sound difference, See what im saying?[/


but then if an fmu cant supply for over 7 pounds of boost, is it 7 pounds at TB or TURBO cause if its at TB then i guess i can run 8 psi on turbo? but yea it makes more sence that its at TB haha

and how is 6psi feeling?
6psi feels awesomse! it wounld be at TB since the final PSI is 7 by the time it gets to the intake. lets put it this way, If you plan on running anything over 5 PSI, ditch the FMU and get bigger injectors and re-tune, much better this way! At 6 PSI on stock FPR, injectors, and pump im at 94+% injector duty cycle and i havnt had a prob yet. You want to be right around 75-80% max duty cycle tho, if you start to exceed this you need to upgrade injectors. i have the 370cc ones i havnt got around to installing them yet. How much boost do you plan to run?
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Old Dec 7, 2010 | 08:09 PM
  #27  
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Originally Posted by cedes14bamg
and how is 6psi feeling?
Originally Posted by Mitsu.kid.02

6psi feels awesomse!

try 24psi on stock internals in my wrx....
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Old Dec 8, 2010 | 04:59 AM
  #28  
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Originally Posted by JRR
try 24psi on stock internals in my wrx....

I dont think i can pump 24psi on my stock internal lancer Thats pretty sick tho man, they harder to tune than mitsu's? i know they use the tactrix cable as well
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Old Dec 8, 2010 | 10:18 AM
  #29  
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Originally Posted by Mitsu.kid.02
I dont think i can pump 24psi on my stock internal lancer Thats pretty sick tho man, they harder to tune than mitsu's? i know they use the tactrix cable as well
yes a bit harder to tune but its worth it. more maps that you have to look at and adjust for unlike the mitsu's
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Old Dec 8, 2010 | 11:18 AM
  #30  
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[quote=Mitsu.kid.02;8896087]
Originally Posted by cedes14bamg

6psi feels awesomse! it wounld be at TB since the final PSI is 7 by the time it gets to the intake. lets put it this way, If you plan on running anything over 5 PSI, ditch the FMU and get bigger injectors and re-tune, much better this way! At 6 PSI on stock FPR, injectors, and pump im at 94+% injector duty cycle and i havnt had a prob yet. You want to be right around 75-80% max duty cycle tho, if you start to exceed this you need to upgrade injectors. i have the 370cc ones i havnt got around to installing them yet. How much boost do you plan to run?
oh i want to run maybe 7 but yet a few guys are over 10 psi with stock internals! yea im thinking about how maybe 440s would be safer haha, yea read a bit about tuning but i def cant do that my own. so thats kinda why i got a used fmu and fpr both of those together only costed 80, ill just have to think about it i guess

if you got bigger injectors and dont tune i guess that you will have no difference at all? or just run too rich !
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