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I wanna ask a boost question too!

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Old Aug 23, 2005 | 11:36 AM
  #1  
Comet's Avatar
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From: Missoula, Montana
I wanna ask a boost question too!

Actually, mines fairly simple, didn't seem covered in my searches....

Simply, I went to non-seq when I did my engine swap, to try to keep wear&tear down on the turbo's, and I had the system set-up so the wastegate stays open all the time, and so I"m at 6-7 psi... no worries there....

however....

I'm getting a midpipe hear soon, so I will have a full-free-flowing exhaust....

now, my boost question....

will a manual boost controller be sufficient to keep the boost from spiking, even if I set the boost back to the stock 10? or am I going to have to buy an electronic controller?

thnx....

and thank you for not setting me ablaze!
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Old Aug 23, 2005 | 12:21 PM
  #2  
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If you've gone non-seq, then you shouldn't have a problem with boost spike, since there's no more transition between turbos.

Boost creep at high rpms could be a problem, however, since the exhaust flow could overpower the stock wastegate. Every car is different, especially with the differing mods of every car out there.
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Old Aug 23, 2005 | 12:32 PM
  #3  
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Cool.... well couldn't hurt to try at least... I'm still on the stock airbox, and no other mod's cept exhaust.... I don't spend too much time at the top, and I always watch my gauge.....
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Old Aug 23, 2005 | 01:28 PM
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rynberg's Avatar
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Originally Posted by Comet
... I'm still on the stock airbox, and no other mod's cept exhaust.... I don't spend too much time at the top.....
Why get a midpipe then?
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Old Aug 23, 2005 | 01:32 PM
  #5  
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my cat's clogged as all poo.... and I'm moving back to montana, so no need for money spent on cat..... cost effective! plus when I do get up top, I'd like a little more umph!
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Old Aug 23, 2005 | 01:33 PM
  #6  
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I did the non-seq conversion. You should consider an aftermarket ECU before you throw in the midpipe. The midpipe is a significant change. You need to get rid of that stock airbox and let that rotory breathe.
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Old Aug 23, 2005 | 01:41 PM
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A MBC will be just fine for a non-seq setup, I've ran that for quite some time.
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Old Aug 23, 2005 | 02:04 PM
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ok... I'll look in to that.... but what about the clogged cat? it's trapping a lot of heat... my exhaust flow is very poor...
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Old Aug 23, 2005 | 03:05 PM
  #9  
rynberg's Avatar
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The problem is that with an open intake and open exhaust, you may get boost creep -- which cannot be controlled by a boost controller. If it occurs, it can only eliminated/reduced by porting the wastegate or adding a restrictor plate back into the exhaust.

Too many people on here treat a midpipe like it's just another bolt-on, when in fact, it is actually a pretty serious modification.
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Old Aug 23, 2005 | 03:07 PM
  #10  
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From: Missoula, Montana
Well crap.... lol, so, maybe get another cat? or just bite the bullet and port the gate?
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