attached mail follows:
jules wrote:
>
> Andre Mauboussin wrote:
> >
> > jaallis@ibm.net wrote:
> > >
> > > I've read all the posts awhile back regarding TB's. I never saw if anyone
> > > benefited from them. If there was a difference was it worth the cost?
> > > Also, I read somewhre that the V6 uses a TB with smaller throttle plates
> > > than the V8's. If true, could I use a V8 TB either modified or not to
> > > achieve even more airflow and increases than if I used a modified V6 TB?
> > >
> > >
> > Yes, you can bolt on a V8 throttle body, but you will have to remove
> > the inake and carefully grind the holes to the larger V8 diameter. While
> > you have the intake off, you can have a machine shop mill the intake
> > runners in the plenum area down. These two mods will give you
> > significant gains (25-30hp) and shouldn't cost too much. Get yourself a
> > copy of the July 97 issue of mopar muscle where these and other mods are
> > shown in detail. I don't recommend glasspack type mufflers. A large,
> > turbo syle muffler will perform better and can sound quite throaty as
> > well. Good luck
>
> fyi...
>
> over the past several quarters we have had several 3.9 customers send us
> their changed out V8 tbis to exchange for modified MPI 3.9s as they did
> not like the performance with the v8 they put on. soft bottom ends,
> poor in traffic performance, stock worse than modified 3.9s.
>
> we milled 1/4" off an intake runner and measured it on a superflow 600
> set on a 420 scale. the monometer showed NO movement of the fluid
> level... ie, no cfm gains! imo, based upon extensive work in the
> manifold and tbi area the milled runner may give some gains at WOT with
> a built engine, but for the "regular" guy... it will be a costly
> exercise with little or no effective gains. there are other ways to
> wake the 3.9 and it IS easy to get it to out run a stock 5.2 or a 5.9...
>
> to say you will get significant gains with above referenced info from
> the mag article is a misrepresentation of the facts..., ioo
>
> magnum performance
Thanks Jules. I'm looking to really improve my 3.9 and don't want to do
anything to make it worse. It's hard to get any performance people to
talk to me because I own the V6. I'm putting on a free flow exhaust
soon, what should the next step be. Thanks again
Jay
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:07:48 EDT