[s-cars] How much boost?

[Robert Myers]

Tony,

That sounds pretty high to me.  For MRC stage 2 you should be seeing 22-23 
psig maximum boost levels.  You might possibly see a spike up to 24 or even 
25 after reaching 23 psig and then suddenly snapping the throttle shut but 
that, if it happens at all, should be purely transitory.  27 psig is too 
high for consistent operation.  Your stage 2 software is designed for the 
22-23 psig level.  Consistently higher boost levels will likely produce 
lean mixtures which, with prolonged exposure, could result in excessively 
high exhaust temperatures leading to things like burnt valves, etc.

Do you have your wastegate perch screwed down?  If so, it might be a good 
idea to back it off some.  Also one can ask just how sure are you of the 
accuracy of that digital gauge?  A mechanical gauge might be a better idea.

And you are right.  100 mph gets there pretty quickly.  So does 130.  :-)

Bob

At 09:31 AM 5/3/2005, tony.curran at sympatico.ca wrote:

>Hi all,
>
>Did the MRC stage 2 to my car at the weeked and also fitted a digital 
>boost gauge. Just wondering with everything just about stock, apart from 
>Monster Air Intake mod, what should I be expecting for top end boost? On a 
>test at the weekend the gauge imaxed at 27 psi but do I believe that?
>
>...and man, does it get to 160km/hr (100mph) very quickly :)
>
>Tony
>96 S6
>
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Bob
Http://Chips-Ur-S.com