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

[arnie]

Somehow, I read the post as acceleration, in lieu of acceleration RATE. :(
Thanks!

GAS

----- Original Message ----- 
From: "Adam Wade" <espresso_doppio at yahoo.com>
To: <diy_efi at diy-efi.org>
Sent: Monday, October 28, 2002 10:14 AM
Subject: Re: [Diy_efi] Re: Question about speed density, etc.


> --- arnie <arnie_ at charter.net> wrote:
> 
> >> increasing the throttle opening would have no
> >> effect on the acceleration of the vehicle,......
> 
> > Are you confusing pressure with total flow?
> 
> No.  If you can maintain a constant MAP despite
> increases in rpm, then you are delivering the same
> amount of air to each combustion chamber on each
> revolution, given a similar VE (and at higher rpms,
> the VE generally does not change appreciably over a
> fairly small rev range).  So your acceleration rate
> would be almost 100% consistent with a change in rpm,
> without anything else being a factor.  In fact, if you
> can maintain a constant MAP of any given number, the
> only factors controlling acceleration would be a 2D
> table of rpm and VE, as far as I can see (assuming
> spark timed for optimum peak pressure timing).
> 
> Adam Wade                       1990 Kwak Zephyr 550 (Daphne) 


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