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I realize why he is asking. My theory remains the same. Yes, N2O is an intercooler, but it is also a tremendous heat generator. In other words, the cooling effect of the N2O will not outweigh the heat it produces in the cylinder. CRAIG S WALKER wrote: > I believe he is referring to the intake temperature drop. N2O becomes a gas > at -127 deg F....quite an intercooler. This fact alone is what led to > funnybike racers experimenting with the stuff in the late seventies - early > eighties. In those days ,folks like Terry Kizer were running 3 stages of > nitrous w/30-35 psi of boost. > > Speaking of which, I heard Terry Mr. Turbo Kizer has run in the sixes on his > push button start pro mod/funnybike ZX11. Has anyone got the low down? > > Craig S. Walker > > ----- Original Message ----- > From: Bryan Goodwin <bgoodwin@iquest.net> > To: John C Williamson <john.williamson5@virgin.net> > Cc: Lorcan Parnell <lorcan@globalnet.co.uk>; <turbobike@natvideo.com> > Sent: Sunday, April 18, 1999 8:37 AM > Subject: Re: [turbobike] carburation vs fuel injection > > N2O makes a great deal of cylinder pressure and heat. N2O often requires > timing > retard and/or good fuel by itself. I do not believe you should add any boost > because of N2O. > > John C Williamson wrote: > > > >From a simple 'physics' standpoint a carb always has to restrict the air > > flow slightly, as this 'venturi' is the thing that actually draws fuel > from > > the floatbowl. The flow through carbs is pretty efficient on modern bikes > > though so the difference will be quite small. > > > > It is true that fuel injection will allow more accurate fueling in all > > conditions, if money / time allows so less flat spots and possible better > > throttle responce. > > > > On the other hand my 1100 GSX EF used a cheap stock Mr Turbo kit with a > > single draw through carb and this was fine! Idle was a little ragged, but > it > > kind of adds character! Unlike the short 'banana' drag style exhaust pipe > > that tries to turn your left leg to charcoal. > > > > Does anyone know how much extra boost is possible with N2O due to the > > cooling effect? > > > > BURGERMAN > > > > ----- Original Message ----- > > From: Lorcan Parnell <lorcan@globalnet.co.uk> > > To: <turbobike@natvideo.com> > > Sent: 18 April 1999 19:41 > > Subject: Re: [turbobike] carburation vs fuel injection > > > > Christer, > > > > I have to disagree. It is not possible to match the performance of EFI > with > > carbs. If it was, the F1 teams would use carbs. Indycars would use carbs. > > They don't. EFI will always be ahead and as technology improves more so. > > Your point about the variations in flow is simply wrong. Yes, you need 8 > > injectors, possibly more (my bike has 16). Bikes of the future will all > use > > EFI. The only reasons to use carburettors is because they are cheap, or > > because the rules (like in Pro Stock) don't allow EFI. > > > > Regards > > > > Lorcan > > > > -----Original Message----- > > From: Christer Johansson <christer.johansson@mbox383.swipnet.se> > > To: turbobike@natvideo.com <turbobike@natvideo.com> > > Date: 18 April 1999 16:52 > > Subject: Re: [turbobike] carburation vs fuel injection > > > > I thought of going to EFI ,but I saw no reason to do it. > > Efi does have some advantages in that you can map the fuel > > and ignition curves more precisly. But itīs possible with carbs > > and a adjustable ignition module to. > > As long as the engine gets the right A/F ratio there is no advantage > > in EFI powerwise. To know what A/F ratio you have,you will > > need a lambda cell, also a EGT sensor would be nice. > > This goes for both Efi and carb setups. > > During the dial in period I will use a lambda cell and EGT sensors in > > all 4 exhaust pipes and the collector, on the new system. > > Also, blow through carbs could prove more "forgiving" to the design > > of the plenum etc than a EFI would be. If you get sligtly more flow > > through some carbs the injectors on a EFI system will still spray > > the same amount of fuel, on a carb system it will drag the fuel needed. > > Also if you run a high hp EFI system you will need 8 injectors on a > > 4 cylinder engine ,otherwise you could get trouble with idle as the > > injectors would be qite big. > > Carbs gives better fuel atomizing at low engine speeds. > > But a EFI setup looks cooler though.... > > > > Christer