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
>
>
>
>
>
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