plenum volume

[xxalexx at ix.netcom.com]

> Date:          Thu, 19 Feb 1998 23:28:22 -0800
> To:            diy_efi at efi332.eng.ohio-state.edu
> From:          Eric Schumacher <e.schumacher at postoffice.worldnet.att.net>
> Subject:       Re: plenum volume
> Reply-to:      diy_efi at efi332.eng.ohio-state.edu

Would placing a rotating ball valve in the intake manifold help 
control the reversion?  I thought of this when it looked like half 
the fuel-air was coming out of carb on dyno at WOT and low rpm.
Alex
> At 11:52 PM 2/19/98 PST, you wrote:
> >ref Paul Tholey:
> >   IMHO, for a SBC runners should be thought of more in
> >this manner.
> >   Large cross sectional area runners are for better cylinder filling at 
> >       high rpm.
> >   Shorter runners enable a motor to rev quicker.
> >   Long runners help to minimize reversion.  Reversion
> >   can truely hinder MAF readings.
> >(needless to stay the inverse apply)
> >So a vehicle with a wide ratio gear box, and lower
> >   (numerically) gears would need to min reversion
> >   (long runners), and would not need to change rpm
> >   quickly.
> >Part of the reasoning for this is the Can-Am big blocks 
> >of the mid/late 60's, really long IR with huge cross-
> >sectional areas.  
> >  It sorta follows the flow, of what most people do/think
> >but I like my tweaks.
> >  Bruce
> >Any others with other thoughts?.   
> >
> Lotsa Luck Eric
> 85 GTI with VR6 power
> 
> 
>