I agree with Bill on this...the stock heads are prone to cracking.
However, finding a set of good stock Magnum heads isn't hard as their is an
abundance of them from wrecking yards ('92+ 5.2/5.9L heads are the same) or
from folks who have swapped out to the R/T heads and are selling them either
personally or on eBay.
Cost wise, it's cheaper to modify a good set of stock heads ($450-$500 for
rework w/porting and gasket matching on the average)...but performance wise,
the R/T heads will come out ahead when it boils down to all out high-end
performance.
On Supercharged and/or large cubic-inch displacement applications,
definitely invest in a set of R/T heads.
- Bernd
----- Original Message -----
From: <B1LLYW@aol.com>
To: <aol@dakota-truck.net>
Sent: Monday, March 24, 2003 9:51 AM
Subject: Re: DML: Porting stock heads (Ray Block)
>
> In a message dated 3/24/2003 10:39:08 AM Eastern Standard Time,
> bpracing@worldnet.att.net writes:
>
>
> > You know, I've heard that but haven't seen any evidence to back it up.
Have
> > you had 10 heads magnafluxed? I've just had 4 used, stock magnum heads
> > magnafluxed for cracks and only one had a crack. It is small and on
the
> > edge of one exhaust seat. The machine shop said it's easily repairable.
> > That head was off a high mileage van that died an ugly death due to lack
of
> > maintenance. (the oil pickup was totally blocked by sludge) :-(
> >
>
> I looked at a dozen stock heads when I was at KRC's shop in Florida. They
> were all take-offs that Marty had replaced with R/T heads. Every single
head
> had I saw, without exception, had cracks. He told me that virtually
everyone
> he pulls off, has cracks, usually between the seats.
>
> Here's a link a recent thread on dodgetrucks.org on the same subject.
>
> http://www.dodgetrucks.org/forums/viewtopic.php?t=21450&
> highlight=cracked+magnum+heads
>
> BTW Ray, I agree that the flow on the stock Magnum heads is decent, I just
> wanted to point out what is a potential downside i.e. durability.
>
> Bill White - http://www.bionicdodge.com
>
> '02 Dakota QC 4x4, SLT +, 4.7, 5 spd, 3.92 LSD
> '95 Dakota CC 4x2, SLT, 318, 5 spd, 3.55 LSD
>
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