14.5 is normal for an alternator. You can put much more voltage?24 volts is
fine, though you?ll blow lots of other stuff. Just make sure you use a ballast
resistor and keep an eye on your points. Condensers kind of suck these days.
They?ll handle much higher voltage (like 400V) but the ground connection is
often iffy. A higher primary voltage can pit the points quickly if your
condenser isn?t up to snuff. If it is, then it won?t hurt a thing. The flyback
voltage is hundreds of volts.
> On Feb 16, 2017, at 4:34 PM, Mordy Dunst via Fot <fot at autox.team.net>
> wrote:
>
> How much voltage can I put into a stock ignition. ? 14.5?
>
> MDunst Headgasket.com 626.358.1616 T 626.628.3777 F Triple R Munitions, Inc
> 626.201.9471 T FFL 6,7 SOT 2
>
> On Wednesday, February 15, 2017, Gregmogdoc--- via Fot <fot at
> autox.team.net> wrote:
>
> Unless your valve gear is extremely light weight, you
> should probably be running at least 105 lbs of
> pressure on the seat with the valve closed. A G3 cam
> is a pretty aggressive grind that is designed to run
> up close to 6800 rpm. 95 psi on the seat is not enough.
>
>
> Greg Solow
> The Engine Room
> Sports Car Specialists
> Santa Cruz, CA 95060
> 831 429-1800
>
>
>
> ------- Original Message -------
> From : timmmurphh--- via
> Fot[mailto:fot at autox.team.net]
> Sent : 2/15/2017 9:20:12 AM
> To : fot at autox.team.net
> Cc :
> Subject : RE: Re: [Fot] valve spring pressure on TR4
> race engine
>
> Thanks for all of your responses. We are going to
> add 0.030 shim to give 1.625 in spring height with
> valve on seat for a spring pressure of 95 lbs. At
> valve full open with .342 max cam lift and 1.5 rocker
> arm ratio with a 0.016 valve clearance setting
> (Kastner G3 cam) we should get about 244 lbs. of
> spring pressure with the maximum valve lift of 0.497.
> At least that is what I calculated. As a note, I did
> get some valve float at about 6200 to 6300 RPM at
> Elkhart Lake last Fall with the 85 Lbs. of seat
> pressure when I went over our max RPM of 6000 trying
> to get past a Volvo. Tim Murphy From:
> timmmurphh at gmail.com [mailto:timmmurphh at gmail.com]
> Sent: Tuesday, February 14, 2017 1:56 PM
> To: fot at autox.team.net
> Subject: valve spring pressure on TR4 race engine I
> have 85 lbs. pressure on the intake valve with the
> valve closed and it sits at a height of 1.655 inches.
> At .400 lift, I have 190 lbs. of pressure. We only
> run to 6000 RPM with the gearing we have and the
> engine we have. The valve springs are double springs
> and the machine shop says they are all about the
> same, very consistent. What pressures would be
> recommended? The machine shop thinks these pressures
> are light for a 6000 RPM engine. Any advice will be
> appreciated. Thanks. Tim Murphy1961 TR4 #317 BRG
>
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