> Yeah, I altered the combustion chamber, mainly to deshroud the valves.
Also
> put on a 3 angle cut. I'd say I got more hp than just from this though. I
> know it is important not to overdo the ports, but I feel there is still a
> lot of hp to be gained there. I was using a hillman hunter head however,
> which has sloghtly more restrictive ports.
>
> Greg
>
>
>
> ----- Original Message -----
> From: Barbara Blue <the_blues@worldnet.att.net>
> To: Greg Locke <glocke@ihug.co.nz>; Alpine list <alpines@autox.team.net>
> Sent: Thursday, 8 March 2001 14:46
> Subject: Re: More Power from the 1725
>
>
> > Did you alter the combustion chamber? In this article he claims that is
> > where the hp is, not in proting. I am going to see if we can
successfully
> > scan this thing and send it out by E-mail. Will take a few days though.
> > the computer genius, my 14 year old son, is to be comatose on the floor,
> and
> > I will be real late getting home tomorrow.
> > Bill
> > ----- Original Message -----
> > From: "Greg Locke" <glocke@ihug.co.nz>
> > To: "Barbara Blue" <the_blues@worldnet.att.net>; "Alpine list"
> > <alpines@autox.team.net>
> > Sent: Wednesday, March 07, 2001 7:34 PM
> > Subject: Re: More Power from the 1725
> >
> >
> > > 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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