It depends on the engine tune, weather conditions, driving style, and PCM
program. What it did for my co-workers WJ may not be the same on your
Dakota. The WJ's are a little lighter than the Dakota's as well.
The HO cams, intake, and throttle body will definitely wake up the 4.7L
though. Keep in mind that while the HO cams do work, they're designed for a
4.7L with higher compression and a different PCM program than the non HO
engines.
- Bernd
-----Original Message-----
From: Steve Preston [mailto:steveophonic@yahoo.com]
Sent: Tuesday, August 21, 2007 7:23 PM
To: dakota-truck@dakota-truck.net
Subject: Re: DML: RE: RE: RE: 4.7L V8 TB Spacer
2 mpg gain?? Would it work on my 2001 4.7 Dak?
Thanks! Steve P.
P.S. HO cams and manifold on the way for it. :)
--- "Bernd D. Ratsch" <bernd@dodgetrucks.org> wrote:
>
> Going by my experiences at the track, dyno, and
> watching the fuel economy
> with the modified TB's - they work. Too many people
> have noticed the same
> thing as well to say that they don't work.
>
> The 4.7L HO WJ that one of our sales people has
> (with Fastman TB)...well,
> again - the "doesn't work" theory is out. It made
> an almost 2mpg gain and
> the performance off the line and crusing is
> noticeably better than with the
> stock TB.
>
> The spacers - yup, make a nice whisteling noise but
> do nothing else.
>
> - Bernd
>
> -----Original Message-----
> From: Ray Block [mailto:bpracing@worldnet.att.net]
> Sent: Tuesday, August 21, 2007 5:16 PM
> To: dakota-truck@dakota-truck.net
> Subject: DML: RE: RE: 4.7L V8 TB Spacer
>
>
>
> > -----Original Message-----
> > From: Bernd D. Ratsch
> >
> > I've heard both good and bad on them - I do know
> that they don't work on
> > the
> > Hemi's. ;)
> >
> > Personally, i'd save the $80 on the spacer and put
> it towards a good
> > modified throttle body.
> >
> > - Bernd
>
> Personally, having extensively drag strip (and
> street) tested a stock 68 mm
> throttle body vs. a Fastman ported 68 mm on my 4.7L
> GC, I'd say save your
> money again. On an internally stock motor a larger
> throttle body doesn't
> make any difference. FWIW, I stand by that
> statement on the 5.2L magnums
> as well.
>
> Ray
> 2000 Grand Cherokee 4.7 - 15.40 @ 85.70
> http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
>
>
>
>
>
____________________________________________________________________________
________
Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel
and lay it on us.
http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7
This archive was generated by hypermail 2b29 : Sat Sep 01 2007 - 00:05:36 EDT