Graham, Hugh & Listers-
The air pump will _not_rob valuable horsepower a whole lot. It's job is
to provide fresh air into the cylinder to help the burn of hydrocarbons and
carbon monoxides. It helps in the efficiency of the flame front inside the
cylinder. (Read: better fuel economy). It also reduces the temperature
inside the cylinder. So...
remove the air injection system if you want to:
1.) pollute the atmosphere more 2.) get worse fuel economy 3.) shorten the
life of your engine and 4.) create _more_drivability problems due to rich
A/F mixture.
Hugh was correct in his interpretation of the crankcase breathing
system. It does not have any negating affects on the engine. The carbon
cannister should not be removed as it only collects and purges gasoline
vapors back into the engine to be reburned. This results in you smelling
better upon arrival to your destination, (you don't smell like gasoline) and
the PCV system gives you better fuel economy.
Removing emissions systems usually result in an increase of drivability
problems and decreased fuel economy as a whole. It is a false perception
that these systems rob horsepower. It was the lower compression ratios that
robbed the horsepower through the 70's, not the emission systems. Lower
compression ratios were the easiest way to meet the strict emission mandates
set in the decade of disco. The engineering had not caught up with the
mandates at the time in regards to cleaner running engines.
Tim Hutchisen
71 TR6
80 TR7 Spider
----- Original Message -----
From: "Hugh Fader" <hfader@usa.net>
To: "'Graham McMicken'" <g.mcmicken@shaw.ca>; "'Triumphs'"
<triumphs@autox.team.net>
Sent: Thursday, November 21, 2002 4:49 AM
Subject: RE: Emission Control
> Hi Graham. I have a 1972 and started to do this because I thought it was
> affecting idle stability. I decided not to because I didn't want to spray
> oil mist from the crankcase all over. Here are the conclusions I came to:
>
> 1. The crankcase breathing and vapor recovery systems in no way affect
> performance when they are installed properly.
> 2. It's not that hard to get them right.
> 3. You can't have only parts of them installed. They won't work right and
> then may affect performance. You have to remove everything if you want to
> remove anything.
>
> I think you also have an air pump. I think this thing must affect
> performance. I might be wrong, but couldn't it be removed, plumbing
plugged,
> and shorter fan belt installed?
>
> - Hugh Fader
>
> > -----Original Message-----
> > From: owner-triumphs@autox.team.net
> > [mailto:owner-triumphs@autox.team.net]On Behalf Of Graham McMicken
> > Sent: Thursday, November 21, 2002 12:21 AM
> > To: Triumphs
> > Subject: Emission Control
> >
> >
> > Hey all,
> >
> > I was wondering if anyone could help me, or point me to a web
> > site that
> > explains the pro/cons of removing all Emission Control off a
> > 1975 TR6. All the
> > stuff on my car is leaking, and im considering ripping it all
> > off, as there are no
> > emission testing in "The Great White North" (Canada) lol.
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