V6 Vortec to V8 Vortec Conversion

[Shannen Durphey]

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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