[Diy_efi] Re: Question about speed density, etc.

[arnie]

Would you not have an rpm input, along with map and TPS, as well?  

GAS

----- Original Message ----- 
From: "Startled Jackrabbit" <bluefire211 at yahoo.com>
To: <diy_efi at diy-efi.org>
Sent: Saturday, October 26, 2002 2:56 PM
Subject: [Diy_efi] Re: Question about speed density, etc.


> I think there may be a little confusion over what I
> meant in my first post.
> 
> My problem is not that the sensor would be past its
> limits.  What I am worried about is once my intake
> reaches the maximum pressure allowed by the wastegate
> (which is currently set at 12 psi, no spikes, rock
> solid, nearly independent of weather) and I am not at
> full throttle and then I go to WOT.  If more air flows
> into the engine, I am still at 12 psi, so the computer
> doesn't know about it.  If it increased to 15 psi, the
> computer would be able to read that, but the fact is
> it cannot go over 12.
> 
> So, to clarify, the sensor will not be going out of
> its range.  (I'm going to use a 36 psi absolute
> sensor, which reads about 14.7 at atmospheric which
> gives me 21.3 psi of positive pressure before the
> sensor overruns.  If I run that much boost, my engine
> will be toast anyway)
> 
> However, I don't think this is a concern, as was
> stated in a prior post, MAP is MAP.  So going to full
> throttle when I'm already at full boost shouldn't
> matter.  At least, I hope, so is that correct?
> 
> Thanks for the replies.  I appreciate all the
> thoughts!
> 
> Over and out,
> JeremyB.
> 
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