V6 Vortec to V8 Vortec Conversion

[Scott Pearson]

I just had one that took a day and a half to make it.

Scott

----- Original Message -----
From: "Shannen Durphey" <shannen at grolen.com>
To: <gmecm at diy-efi.org>
Sent: Friday, August 17, 2001 9:16 PM
Subject: Re: V6 Vortec to V8 Vortec Conversion


> I didn't see this message make it to the list last night.
>
>
> Shannen Durphey wrote:
> >
> > Eric Bryant wrote:
> >
> > > The LT4 HOT cam is fairly large for a 350, and will present some minor
> > > tuning issues.
> > Not completely true.  Look at the duration.  That cam can be made to
idle
> > extremely well. I've seen it on more than one occasion and it was done
without
> > major tuning headaches.  I've had more troubles with a 350HO engine with
> > aftermarket aluminum heads and 21 lb injectors.
> >
> > > It's also too large for 3.08 rear-end gears, in my opinion.
> >
> > Agreed.
> >
> > > Impala guys are running them in 350 LT1s and getting great results
(even in
> > > those heavy boats), but it takes a fairly loose convertor (not an
issue with
> > > a manual, of course) and some low rear-end gears (3.73 or 4.10)to take
> > > advantage of it.  Of course, it takes some revs to make power, too,
and so
> > > the bottom end better be capable of going over 6k on a regular basis.
> >
> > Not necessarily true, but very helpful.  Bottom end solid to 5k could
still
> > benefit from the cam, though I feel that a 6200 shift point works best
for me.
> >
> > > If
> > > one has an aversion to spinning the motor that fast, take a step back
to the
> > > ZZ3 or '845.
> > Good point.  Also, the zz3 engines had forged rods vs powdered metal
types found
> > in the LT1 and many other late model engines.  I do have an aversion to
spinning
> > pm rods to 6500, that's fer sure.  But guys making more power than I
claim they
> > hold up fairly well, so mine are still in the car.  But I am always
nervous
> > about them.
> > But that's another digression entirely.
> >
> > Shannen
> >
> > >
> > > Eric Bryant
> > > mailto:bryante at ghsp.com
> > > http://www.bryantperformance.com
> >
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