What boost should my car be running at WOT... - Page 2 - 6SpeedOnline

Sep 18, 2003 | 12:35 PM

#16

sharkster

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My friend's Supra hits 2bar with 116 leaded...

Sep 18, 2003 | 12:42 PM

#17

Joe Weinstein

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Joe Weinstein is a splendid one to behold

My Michelins...

My Michelins run consistently at about 3 bar. I have four of
them too. Does that make 12?

Sep 18, 2003 | 12:44 PM

#18

W8MM

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From: Cincinnati, USA

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Re: Re: Re: Re: What boost should my car be running at WOT...

Quote:

Originally posted by Joe Weinstein
...
You have to subtract the ambient atmospheric pressure
to get boost. (I think)
Joe Weinstein

Exactly right, Joe.

The boost meter in the dash reports "gauge boost" which is the excess over atmospheric. 1700 h Pa is 0.7 Bar "gauge boost".

Sep 18, 2003 | 07:11 PM

#19

Jack(LA)

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From: Los Angeles

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Re: Re: Re: What boost should my car be running at WOT...

Quote:

Originally posted by Ruiner
Jack, nice curve, but the boost 'units' seem a bit off. They are about 2x what they should be.

1600 hPA = ~23 psi or 1.6bar

See for yourself: http://hemsidor.torget.se/users/b/bo...rt/conv2_e.htm

Weird. Any ideas?

I thought something was wrong too when I first tried to figure out Porsche's graph. I'm no expert on this one, but it appears they are measuring boost created by the turbos/motor above 1 atmosphere as the base level -- so 1600 equates to the engine producing .6 bar rather than 1.6 bar. At least, that's what I recall being told when first trying to read this graph. I'm sure I'm doing a terrible job explaining this, so we need some of our "scientist" members to jump in here and help me out.