Hi Bill
Please send me this article. My address is 8 Griffin Ave, Epsom, Auckland,
New Zealand.
I ported my head according to David Vizards instructions (from his book
"Theory and Practice of Cylinder head modifications") and it would have made
a good 10hp difference without any other mods being done (standard twin
strombergs and cam). It is really the key to unleashing power on one of
these engines.
Going to webers and a wild cam now would prob give a further 25 hp
(depending on cam), whereas if the webers etc go an a standard head you may
only get 15 hp all up and the engine won't be as nice to drive.
The head work takes a lot of time, but is fairly inexpensive if you do all
the hard stuff yourself. Allow a good 40 hours.
Balance the engine too, which will give a safe 6500 red line in short
bursts.
You can bore well over .040, (as per MR ZAG) just a custom head gasket will
be
required.
Greg Locke
learner race engine builder
----- Original Message -----
From: Barbara Blue <the_blues@worldnet.att.net>
To: <alpines@autox.team.net>
Sent: Thursday, 8 March 2001 13:03
Subject: More Power from the 1725
> In amongst the parts, spares, and old pieces of chewing gum that came with
my
> first car was a reprint of an article (source unknown) seemingly titled
> "Chrysler 1600/1725" by David Vizard. I am going to condense some of his
> comments and recommendations here for others to comment on, as there seems
to
> be more than a little interest in getting more power (including me).
>
> HEAD Reshape the combustion chambers.
> Intake- blend out the irregularities, and streamline the guide boss
into
> the valve guide
> Exhaust- smooth and match to exhaust system
> Valve Seats- radiused into the port and chamber
> Skim head 60 thou
> These are good for 12-17 hp, which he says is a do it yourself project.
>
> CARBS Stromberg 150's for street use.
> Weber 28/36 is smoother, slightly less hp. Not recommended
over
> the Strombergs
> Weber DCOE 40 for ultimate power if camshaft is modified
>
> FREE FLOW EXHAUST - 5hp
>
> CAM Holbay with timing of 58-66--84-40
>
> BLOCK No more than a 40 thou overbore!
>
> Using Webers on the 1600, he claims 100hp without the Holbay camshaft! It
> appears that with a hotter cam, a person can get really nice results for
> something like $200. Anyone that wants a copy of this article, E-mail me
> your address and I'll send it to you. Caution, it is an old copy and not
the
> best I've seen. Mr. Vizard tends to ramble, and things get confusing, at
> least to me, so I may have misintepreted somethings.
>
> Jay, what do you think of this??
> Bill
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