plenum volume

Clare Snyder snyder at huron.net
Sun Feb 22 18:54:07 GMT 1998


xxalexx at ix.netcom.com wrote:
> 
> > 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
> >
> >
> >
Why not just a good, old fashioned two stroke type reed valve?
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