There are many different ways to richen up the mixture...some have been
tried with resistors, IAT, boosting the fuel pressure, and reprogramming,
it mainly depends on how much you want to get involved.
At 03:03 PM 08/30/1999 +0000, you wrote:
>Ahh....so it was a .02 sensor causing the lean condition and
>not just the larger bores in the stage II TB. I know its a very
>complicated process, researching and modifying the TB's to work in
>certain power bands on specific engines. I thought with the mods he
>had and with a larger TB, it might have been running a little lean.
>Obviously there is more to it than just trying to richen the mixture
>with the IAT. Still curious about it tho.
>
>GS -
>
>Frank.T.Holloway@KP.ORG wrote:
> >
> > GS,
> >
> > The lean condition that I was experiencing with my truck was the result of
> > an O2 sensor stuck on the rich side. When the O2 was replaced, the problem
> > went away. The problem with TB modifications, is that you need to keep the
> > velocity up to get accurate MAP signals to the computer. The larger bores
> > can be made to work, but it requires computer mods to get it right (alter
> > MAP variables to the computer). Larger bores are needed when you clean up
> > the intake track (port work on the heads and intake) but these require
> > computer mods anyway. Any work on the TB's really does require the
> > assistance of a flow bench. Its not just a matter of removing the venturi
> > above the plates. The shrouding was placed in there for a purpose and the
> > computer was programmed with this in mind. The shrouding serves and is a
> > part of the total power band. Removing it does give the feeling of more
> > power (just above idle) but you need to look at the total power band,
> > because power is lost. The shaft even plays an important part of the total
> > equation. Any change in velocity is read by the computer. With the bigger
> > bore TB's we have been playing with, the torque and HP figures along the
> > whole powerband are variable, at certain RPM's they are higher and at
> > others, they are lower than stock.......
> >
> > Frank
> >
> > > -----Original Message-----
> > > From: GS- [SMTP:GSWillhite@ualr.edu]
> > > Sent: Friday, August 27, 1999 7:43 AM
> > > To: DML
> > > Subject: DML: Re: Dyno Check RD 52mm TB vs Stock
> > >
> > > >
> > > > I did a HP check with JBA headers, JBA down tubes, K & N Gen II, ASP
> > > > crank-pulley,
> > > > Bullet 3" by 24" muffler and 3" piping cat back to the rear axle.
> The TB
> > > > is stock
> > > > HP 222.3. I lost HP with the RD 52mm TB. That dyno check had 209
> HP. BTW
> > > > the 52 mm TB makes a excellent paper weight.
> > > >
> > > > --
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:16:13 EDT