Hi John,
Long time no speak with!
If you want more pressure from your pump (Judson), you need to over-drive it a
bit. Change the drive pulley size. What size do you currently have? I have a
4" you might want to try. I would think an A-Series should be good for 7 psi
without any problems or concern for detonation. Someone on the list must be
running in that range?!?
WFO Herb
Gronberg John wrote:
> I am not sure about the head gasket thickness but I just replaced the head
> gasket on my car due to a burnt exhaust valve on #2 cylinder. The original
> gasket I used 10 years ago when I rebuilt the 1275 was a copper/asbestos
> head gasket from Seven Enterprises. This one is suppose to be soaked in
> water prior to installation. I didn't do that when I installed it and I
> think that contributed to the failure. Recently I purchased and installed a
> Fel-Pro head gasket part # 21135S. I read on various chat lines that the
> Fel-Pro gasket is a good one to use, so far it is fine. I also know about
> the Gasket Works and originally though I would give them a try. I still have
> my old head gasket I could mike for you but I am not sure that would help.
> My 1275 is a 8.0:1 from start so I figured that was OK. I fact I have been
> thinking about RAISING my compression ratio to get my Judson closer to 4-5
> LBS. pressure but haven't done anything about it yet.
>
> > -----Original Message-----
> > From: Mark Endicott [SMTP:endicott@nashville.com]
> > Sent: Monday, June 28, 1999 10:37 PM
> > To: Judson List; Spridgets
> > Subject: Judson-Head Gaskets
> >
> > It has been suggested that I consider installing a copper head gasket
> > and even a thicker gasket when I put the Judson on my 1275. As I
> > understand it I can and should reduce the compression ratio with a
> > thicker gasket to help prevent detonation. I have found a url for a
> > company that makes gaskets to order out of pure copper. Is there a
> > formula I can use to determine how much thicker gasket the gasket should
> > be to add the additional chamber volume to change it from a stock 1275H
> > (8.8:1?) to about 8:1?. And/or anybody know what the thickness of the
> > stock gasket is?
> >
> > Gasket Works list gaskets available in the following thickness. Anybody
> > used them for A series gaskets?
> >
> > 022,.032,.040,.043,.054,.063,.086, .093, and .125 inches.
> > http://www.headgasket.com/
> >
> > --
> > Mark
> > 1970 Midget
> > Nashville, TN
> >
> > http://members.home.net/mendicott/midget.html
> > http://www.NashvilleTN.org/
> >
> >
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