I think another is the second fuel pickup/lines. I would also expect some
cooling issues, since there is going to be more combustion going on due to
more gas/O2. Definately more stress on the engine and driveline, bottom
end especially. Rear spring windup, driveshaft strength, sill integrity,
and all those types of things they mention in V8 conversions.
Those are the ones that immediately come to mind.
james
On Tue, Jul 17, 2001 at 07:22:27PM -0000, Scott Allen profoundly declared:
> Hi,
>
> Yep, it is still acedemic. I was thinking about it last night and figured
> you could pull it off with Webers as there's stock kits out there that'll
> allow it. I'm trying to figure out/understand what the unintended
> consequences would be, (insulating the lines from the exhaust is a good
> one)...
>
> Thing is, after seeing the shaved down B in the NAMGBR mag a few months
> back, and seeing a B at British Car Day in Bowie MD last month that'd had
> the same treatment, I figured someone on the list would had to have tried it
> or seen it done, but no takers so far...
>
> Scott
>
>
> >From: James Nazarian Jr <jamesnazarian@netzero.net>
> >To: Scott Allen <scottinarl@hotmail.com>
> >CC: mg list <mgs@autox.team.net>
> >Subject: Re: NO3 in a B?
> >Date: Tue, 17 Jul 2001 12:04:56 -0600
> >
> >I think the biggest problem you would have with the MG setup is going to
> >be injection jets. There are two ways to do nitrous that I am aware of,
> >port injection (like fuel injection) and carb plates. Carb plates are a
> >sprayer that fits like a carb spacer under any of your favorite
> >neighborhood
> >american holley pattern carbs.
> >
> >My best guess for a setup would be either a custom manifold to hold a
> >square-
> >bore holley (probably the easiest) or to mount nitrous and fuel jets into
> >each port of the stock manifold. The extra fuel needs will come via fuel
> >injection jets that are part of the NOS system. when the NOS is triggered
> >it will fire the NOS and the aux Fuel jets, all of this happening after
> >the carbs. Under NOS use, the only thing the carb is doing is controlling
> >air, and since air is a function of volumetric efficiency, displacement,
> >and RPM, and none of these are changing, the carbs will probably work.
> >
> >For non-NOS driving you will be using the carb just as always. When you
> >are
> >on the NOS, everything you care about will be happening past the carb, so
> >you really don't care about it. Remember that the function of the NOS is
> >to get about 6x the concentration of air into the engine as you could get
> >with atmospheric air. All this because air is the limiting factor in
> >combustion. This is the same way a turbo and a supercharger work - way
> >more air.
> >
> >With that added air, you can use added fuel. For a forced induction car
> >you are always using the induction so you always need the extra fuel; for
> >NOS you only use it at WOT (wide open throttle) or via manual control
> >(depending on setup) so you only need the extra fuel when you are using the
> >NOS, hence the fuel jets that you will need for the setup.
> >
> >Depending on which of the above routes you went, you could buy a
> >kit to do either. Once you installed the kit you would probably want to
> >run a seperate fuel pickup, with high flow filter, to the fuel pump that
> >undoubtedly came with the kit. It would probably be a holley red pump
> >(~15psi).
> >The last thing to consider would be if you went SUs and injectors in the
> >manifold. Since our manifolds only have two ports, you would either be
> >splitting the jets between the two cyls each port feeds, or you would
> >need 4 jets in each port of the manifold (2 NOS, 2 fuel). This is
> >important
> >because NOS is rated by HP or 'shot' a 100shot (100hp) kit will give its
> >power over the whole engine, so each jet is worth 25hp over a 4cyl engine.
> >So, if you bought a 4-cyl 100shot kit, and installed half the jets, one
> >each in each side of the manifold, you would only have a 50shot system.
> >So, if you only put one set in each part of the manifold, you would buy
> >the kit (or jets) twice as big as you want so that when they are split
> >between two cyls they make the power you intended.
> >
> >Oh yea, you would also have to insulate the HE*! out of the lines, since
> >our exhaust is right under our intake. This stuff is very explosive and
> >the last thing you want is to burst a line and blow your car to
> >smithereens. I wish I could show you pics of what happens when this stuff
> >blows, but it looks like a missle hit the car.
> >
> >If you followed all of that you probably know enough to install one.
> >Is this still purely academic? This is starting to sound fun.
> >
> >--
> >James Nazarian Jr
> >71 MGB roadster
> >71 MGBGT-V8 in need of paint
> >01 Impreza 2.5RS
> >
> >A complex system that does not work is invariably found to have
> > evolved from a simpler system that worked just fine.
> >
> >On Tue, Jul 17, 2001 at 01:44:46PM -0000, Scott Allen profoundly declared:
> > >
> > > So do you think the dual SU would work?
> > >
> > > -Scott
> > >
> > >
> > > >From: James Nazarian Jr <jamesnazarian@netzero.net>
> > > >To: Scott Allen <scottinarl@hotmail.com>
> > > >CC: mgs@autox.team.net
> > > >Subject: Re: NO3 in a B?
> > > >Date: Mon, 16 Jul 2001 11:18:05 -0600
> > > >
> > > >Big fuel pump. The primary cause of nitrous engines blowing up is too
> > > >little gas, not too much nitrous. So you gotta make sure you get
> >enough
> > > >gas there. That would be my first step. The rest would come down to
> > > >how much nitrous would you want to use?
> > > >
> > > >--
> > > >James Nazarian Jr
> > > >71 MGB roadster
> > > >71 MGBGT-V8 in need of paint
> > > >01 Impreza 2.5RS
> > > >
> > > >A complex system that does not work is invariably found to have
> > > > evolved from a simpler system that worked just fine.
> > > >
> > > >On Mon, Jul 16, 2001 at 03:05:20PM -0000, Scott Allen profoundly
> >declared:
> > > > > All,
> > > > >
> > > > > This question, and the discussion that may follow is for purely
> >academic
> > > > > purposes.
> > > > >
> > > > > I helped a friend install a nitrous, (sp?) kit in his Japanese
> >import
> > > >last
> > > > > weekend, and I was wondering if anyone had done this, or heard of
> > > >someone
> > > > > doing this with a B?
> > > > >
> > > > > I'm also wondering what you should/could do to the B engine, if you
> >were
> > > > > going to put a nitrous kit in to "beef it up" so it could take the
> > > > > punishment.
> > > > >
> > > > > I know it'd be a foolish thing to do with a B, but I can't help
> > > >wondering...
> > > > >
> > > > > Thanks in advance,
> > > > >
> > > > > Scott Allen
> > > > >
> > > > > 74 1/2 BGT
> > > > > 52 TD
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