Super chargers + MAP

[Bruce Plecan]

-----Original Message-----
From: Jemison Richard <JemisonR at tce.com>
To: 'diy_efi at efi332.eng.ohio-state.edu' <diy_efi at efi332.eng.ohio-state.edu>
Date: Thursday, December 03, 1998 10:08 PM
Subject: RE: Super chargers + MAP


>Bruce,
>
>Just curious.  Wouldn't the turbo spinup time be the limiting factor in
>throttle response?

LOts of things come into play with the Turbos.  Some small units
can almost mimmic throttle pedal movements.  Just about  0 lag,
but are boost limited.

 The reason I'm thinking it would be is that a small
>carb's air velocity would be entirely dependent on the ability of the turbo
>to pull air through it and if the turbo won't spin up velocity through the
>carb is not going to be high for some period.
>
>Rick
>
>> -----Original Message-----
>> From: goflo at pacbell.net [SMTP:goflo at pacbell.net]
>> Sent: Thursday, December 03, 1998 9:31 PM
>> To: diy_efi at efi332.eng.ohio-state.edu
>> Subject: Re: Super chargers + MAP
>>
>> Bruce Plecan wrote:
>>
>> > If the supercharger is between the throttle body, and engine, wouldn't
>> > a 1 bar MAP work just fine if it picked up the signal at the base of
>> > the throttle body (reguardless of boost?).
>>
>> Think so.
>>
>> > Granted a 2-3bar MAP could have better resolution.
>>
>> I'm SWAG-ing that resolution could be a significant limitation - A
>> TB small enough to give good res would be volumetrically inefficient.
>>
>> Jack
>