Jon,
We are using a data analyzer/logger ( I think it is a Horaba) and it is used
in conjunction with the dyno and we pull exhaust before the Cat. It has many
channels
and can plot manifold vacuum/pressure, ignition fuel/air ratio, etc. etc
etc. We had to install a 1/8 npt fitting in the header pipe and we cap it
after we are finished.
They tell me the analyzer is a $15,000 piece of equipment. The fuel/air
ratio is supposed to be accurate to within a 1/10% and I believe it. On the
truck, we generally
look at ignition, torque, horsepower, and F/A ratio. I will be seeing my
buddies this weekend, and I will find out more for you......
Frank
> -----Original Message-----
> From: Jon Steiger [SMTP:stei0302@cs.fredonia.edu]
> Sent: Thursday, October 08, 1998 4:10 PM
> To: dakota-truck@buffnet.net
> Subject: RE: DML: TB Mod Question for the Pro's
>
> On Thu, 8 Oct 1998, Holloway,Frank T wrote:
>
> > Bill,
> > The first TB that we did works quite well with the JET chip, it is just
> the
> > big bore TB that needs additional fuel. I just ran my truck on the dyno
> > today and at WOT,
> > fuel air ratio from approx. 2,500 through 4,700 RPM was right around
> 14:1
> > (way to lean for power). Even with the lean condition, horsepower
> figures
> > were way up.
> > 230 vs. 201 at the rear wheels. The stage I TB will probably be the best
> > choice for people not wanting the additional expense of the other mods
> > necessary to make
> > the big bore one work correctly.
> > Frank
> >
>
>
> Frank,
>
> Just curious: What are you using to determine your Fuel/air ratio? A
> scan tool of some type, or some other method?
>
>
> -Jon-
>
> .--- stei0302@cs.fredonia.edu ----------------------------------------.
> | Jon Steiger * AOPA, DoD, EAA, MP Race Team, NMA, SPA, USUA * RP-SEL |
> | '96 Dodge Dakota v8 SLT CC (14.77@92.97), '96 Kolb FireFly 447 |
> `--------------------------- http://www.cs.fredonia.edu/~stei0302/ ---'
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:10:35 EDT