A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

Manual boost controller MOD............

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Old 08-29-2002, 12:30 PM
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Default Manual boost controller MOD............

Is this mod possible for turbo'd Audis?<ul><li><a href="http://www.c-speedracing.com/howto/mbc/mbc.html">http://www.c-speedracing.com/howto/mbc/mbc.html</a</li></ul>
Old 08-29-2002, 12:35 PM
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possible, yes....ideal, no.............
Old 08-29-2002, 12:45 PM
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Please explain why not...TIA
Old 08-29-2002, 01:01 PM
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Default short version.......timing & fuel..........................

if you are going to do it, id reccomend reading this book first...it will awnser all your Q's<ul><li><a href="http://www.sae.org/servlets/productDetail?PROD_CD=BOSCHTECH-26D&amp;PROD_TYP=BOOK&amp;COMMON_SUCCESS=TRUE">Bos ch ME-Motronic Engine Managmnt</a></li></ul>
Old 08-29-2002, 02:24 PM
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Default LOL ...it's biggest weakness is..

You will get different levels of boost depends on the temp and stress on spring. then what's the point of boost controller?!?

Funniest part..
"If you tighten the fittings as much as you can and your still not getting enough boost, then just take it apart, and pull on the spring to make it longer, that way it'll push harder on the ball bearing. "

From the engineer's view..this design might work for few sec..but it will be very unreliable..Boost level will be different as those temp changes...
Those springs on the pkg looks like it came from ball-pen...strength of spring will be differ from its temp,stress..ect..ect..

Also this kind of cheap quaility spring wont have any liner or prograssive rating so..boost control wont be smooth at all.

So after all..you are looking at unreliable, not smooth, uncontrolable boost level..boost controller..
Old 08-29-2002, 03:17 PM
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Default mabye a cheapo 15$ bleed valve style Manual boost controller

i guarantee you any of the aftermarket dual solenoid electoinic boost controllers will be more stable &amp; consistent than the stock N-75 valve
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