Forced Induction Custom FI Setup Questions

mbc no good for low psi?

Old Jun 25, 2007 | 11:13 AM
  #11  
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Default Re: mbc no good for low psi?

i got an 11.somthin psi spring too, might just throw that in there, what will 11psi on a ford 60/63 on a Ls motor do?
Old Jun 25, 2007 | 12:09 PM
  #12  
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Default Re: mbc no good for low psi?

Originally Posted by WTF
i got an 11.somthin psi spring too, might just throw that in there, what will 11psi on a ford 60/63 on a Ls motor do?
Be a lot of fun to drive?
Old Jun 25, 2007 | 03:52 PM
  #13  
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Default Re: mbc no good for low psi?

Why not shim the 6 pound wastegate spring to what ever you need and not even use the MBC?
Old Jun 25, 2007 | 05:33 PM
  #14  
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Default Re: mbc no good for low psi?

i made a post about that actually, i was thinking about that but its gona be a bitch taking it apart and shimming it until its right, probly just gona run 11psi :1
Old Jun 25, 2007 | 09:00 PM
  #15  
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Default Re: mbc no good for low psi?

Run the 11psi spring and it will end up being about 9.67psi anyway due to IC pressure loss DEPENDING on your vaccum source (manifold = higher, turbo = lower).


JP
Old Jun 25, 2007 | 10:03 PM
  #16  
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Default Re: mbc no good for low psi?

Originally Posted by hard2obtain
you need to cut the spring a little, i do that, now i can go from 6 to any psi

note: i use an internal wastegate set at 6psi
+1

Easiest thing to do...

Old Jun 25, 2007 | 10:16 PM
  #17  
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Default Re: mbc no good for low psi?

One question... If you were to use an electronic boost controller would that help reduce spool time by keeping the wg closed until the last possible second?

Ok I looked into it and the answer is yes.. But does anyone here know if its really that big of a difference? It doesnt sound like a big deal unless I'm competing in drag events trying to shed one tenth of a second...
Old Jun 25, 2007 | 11:46 PM
  #18  
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Default Re: mbc no good for low psi?

Originally Posted by losesomethinbra
One question... If you were to use an electronic boost controller would that help reduce spool time by keeping the wg closed until the last possible second?

Ok I looked into it and the answer is yes.. But does anyone here know if its really that big of a difference? It doesnt sound like a big deal unless I'm competing in drag events trying to shed one tenth of a second...
You will probably fry tire regardless of how quick your turbo spools, so until you fix your traction issues, don't worry about it.
Old Jun 26, 2007 | 02:11 PM
  #19  
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Default Re: mbc no good for low psi?

i had a cheap egay mbc that did the same thing. couldn't go any lower than 11psi. ended up just not using it for the time being because even cutting the spring didn't change anything. maybe i didn't cut enough off.

-Luke
Old Jun 26, 2007 | 07:14 PM
  #20  
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Default Re: mbc no good for low psi?

Originally Posted by losesomethinbra
One question... If you were to use an electronic boost controller would that help reduce spool time by keeping the wg closed until the last possible second?

Ok I looked into it and the answer is yes.. But does anyone here know if its really that big of a difference? It doesnt sound like a big deal unless I'm competing in drag events trying to shed one tenth of a second...

If I'm not mistaken, that's how external gates work already, but I think I'm wrong...I forget. Internal bleed and fluctuate and suck.


JP

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