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less boost more whp?

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Old Dec 7, 2007 | 10:40 AM
  #16  
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From: Upstate, SC
If I remember correctly changing the load values for the boost solenoid to control higher boost is possible now. I am having a similar deal being done to a custom ECU flash for my car.
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Old Dec 7, 2007 | 10:40 AM
  #17  
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Originally Posted by Jim in Tucson
FWIW...

There is a self-tuner Evom member (I think in CA - so 91 octane) that swears he has tried every tuning combination and he makes the most power when tuned at 18psi. I can't find the post right now, however.

I know the instinctive thing to do is turn up the boost, but has anyone ever attempted some dyno experimentation at lower boost levels?
wow. interesting thanks! btw, we also have high humidity and warmer climate here. hehe. sorta like florida I guess.
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Old Dec 7, 2007 | 11:02 AM
  #18  
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From: Flyover country.
More air = more power. More boost = more air. It's quite simple.
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Old Dec 7, 2007 | 11:20 AM
  #19  
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Originally Posted by mplspilot
More air = more power. More boost = more air. It's quite simple.
Yes but there is a point at which turbo efficiency, boost spike, additional heat produced by the compressed air from the turbo and the octane rating of your fuel begin to produce diminishing returns when increasing your boost pressure and where that point of diminishing returns is, is modifications, climate, fuel and vehicle specific.
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Old Dec 7, 2007 | 11:30 AM
  #20  
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From: Flyover country.
Yeah, but 1.2 bar is not that point.
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Old Dec 7, 2007 | 11:34 AM
  #21  
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Originally Posted by bad driver
Noob question.... tho my tuner asks this too: what can an MBC do that manipulation via ecuflash can't? thanks. (aside from on-the-fly the knob adjustment) could it bring the boost up
in a way that can't be achieved through ecuflash? thanks!
The MBC can do nothing additional from what ECU based boost control (via EcuFlash) can do, besides the on the fly adjustment.

A MBC can bring the boost higher compared to ECU boost control if the pill is not modified. Once the pill is modified, you can get no more boost out of an MBC than you can from the stock solenoid.

In fact, I'm a huge proponent of ECU boost control. Why? Because MBCs are notorious for large spikes, boost creep, and big boost changes from altitude and ambient temperature.

Once set up correctly, ECU boost control is stealth and you will always have the exact same boost curve. You can't say that about an MBC.
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Old Dec 7, 2007 | 12:19 PM
  #22  
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Originally Posted by urBan_dK
The MBC can do nothing additional from what ECU based boost control (via EcuFlash) can do, besides the on the fly adjustment.

A MBC can bring the boost higher compared to ECU boost control if the pill is not modified. Once the pill is modified, you can get no more boost out of an MBC than you can from the stock solenoid.

In fact, I'm a huge proponent of ECU boost control. Why? Because MBCs are notorious for large spikes, boost creep, and big boost changes from altitude and ambient temperature.

Once set up correctly, ECU boost control is stealth and you will always have the exact same boost curve. You can't say that about an MBC.
thank you, I will stop second guessing and doubting my tuner from now on. you are all confirming what he's been telling me.

will probably ask him the possibilities of trying a tune for higher boost in the future but I get the impression that he already did his best given all the factors like humidity and fuel quality. wouldn't hurt
to ask if ever I have a new mod that requires tuning.

thanks! btw, nice quote from bertrand russel.

Last edited by bad driver; Dec 7, 2007 at 12:24 PM.
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Old Dec 7, 2007 | 12:22 PM
  #23  
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Originally Posted by mplspilot
Yeah, but 1.2 bar is not that point.
Yeah, that's what's been bugging me too but maybe our fuel is not that good and climate too humid?
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Old Dec 7, 2007 | 01:10 PM
  #24  
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Originally Posted by mplspilot
More air = more power. More boost = more air. It's quite simple.
that is one of the funniest things ive read on here.

You don't really believe this do you? I have to have missed the sarcasm.
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Old Dec 7, 2007 | 01:19 PM
  #25  
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From: Everett, WA
Originally Posted by Onyxeros
that is one of the funniest things ive read on here.

You don't really believe this do you? I have to have missed the sarcasm.
Don't be too quick to judge: what was written is completely valid, if oversimplified.

An engine is just a glorified air pump. Give it fuel and a spark and it does its thing.

Of course, in the real world other variables come into play...
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Old Dec 7, 2007 | 01:30 PM
  #26  
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Originally Posted by urBan_dK
Don't be too quick to judge: what was written is completely valid, if oversimplified.

An engine is just a glorified air pump. Give it fuel and a spark and it does its thing.

Of course, in the real world other variables come into play...
anyone that knows anything about cars knows that more air means nothing without more fuel, fuel trimming, and timing.

you cram more air into a completely stock motor and tell me what happens...better yet post a vid on youtube of your glowing cast iron manifold right before you destory your motor.

glorified air pump yes but there's a whole lot of 'glory'
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Old Dec 7, 2007 | 01:30 PM
  #27  
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Originally Posted by urBan_dK
Don't be too quick to judge: what was written is completely valid, if oversimplified.

An engine is just a glorified air pump. Give it fuel and a spark and it does its thing.

Of course, in the real world other variables come into play...
You got it!
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Old Dec 7, 2007 | 01:38 PM
  #28  
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From: Everett, WA
Originally Posted by Onyxeros
anyone that knows anything about cars knows that more air means nothing without more fuel, fuel trimming, and timing.

you cram more air into a completely stock motor and tell me what happens...better yet post a vid on youtube of your glowing cast iron manifold right before you destory your motor.

glorified air pump yes but there's a whole lot of 'glory'
The theory of what the guy posted is sound. No one is arguing that if you neglect to add fuel to the increased air that you have a problem on your hands.

I'm not sure if you're trying to imply that I don't know anything about cars with this post, because I certainly do.
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Old Dec 7, 2007 | 01:47 PM
  #29  
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If I had a quarter for every post that turns into an argument... I would have at least fifty bucks I think.
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Old Dec 7, 2007 | 01:51 PM
  #30  
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Originally Posted by zl1560
If I had a quarter for every post that turns into an argument... I would have at least fifty bucks I think.
you are correct

Ill stop but anyone that thinks adding more air is the only way to make power should never touch a car...NOS anyone
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