[Nobbc] Abnormally high oil pressure

[Scott Irwin]

British HP ratings in the prewar years were  based on the bore size only, 
and not the actual measured HP, or BHP.  This was how the tax was calculated 
and why so many stroker engines were produced.  So, the 21 HP is likely 
closer to the 85 hp than it seems.

Scott
'65 Spitfire

--------------------------------------------------
From: "Greg Badano" <gsb1159 at pacbell.net>
Sent: Monday, March 15, 2010 11:41 PM
To: "North Bay British Car Club" <nobbc at autox.team.net>
Subject: Re: [Nobbc] Abnormally high oil pressure

> Hi Andy,
>
> Have to say that's quite a coincidence that your friend had an Aceca as 
> there
> were not that many of them produced.  Mine has the original AC (Weller) 
> engine
> in it which is good for about 102 hp.  Not exactly neck snapping by 
> today's
> standards but not too bad.  When AC first started putting the AC engine in
> Aces and Acecas, they were rated at about 85 hp (note that the original 
> "light
> six" was rated at about 40 hp when it first came out around 1921) and by 
> the
> end of the production were rated at 105 hp.  Bristol engines (an expensive
> upgrade at the time) were rated at either 105 or 125 depending on the 
> state of
> tune.  When the supply of Bristol engines dried up, AC enlisted the Ford
> Zephyr which was also an inline 6 cylinder.  At its highest state of tune 
> it
> was rated at 175 hp.
>
> My apologies if I got a little bit carried away with the AC history 
> lesson...
>
> Will try your suggestions when I get into it this weekend and let you know
> what I find.
>
> Best,
>
> Greg
>
> --- On Mon, 3/15/10, andy preston <andypreston at sbcglobal.net> wrote:
>
>
> From: andy preston <andypreston at sbcglobal.net>
> Subject: Re: [Nobbc] Abnormally high oil pressure
> To: "'North Bay British Car Club'" <nobbc at autox.team.net>
> Date: Monday, March 15, 2010, 6:11 PM
>
>
> Greg, I was at a friends house today, watching him paint a car and I asked
> him if he knew anything about the AC Aceca.  To my astonishment he told me
> that he used to own one and of course regrets selling the car.  He said 
> that
> the original engine was designed in 1919 and stayed almost that way until
> they installed the Bristol engine and later the Ford Zephyr (Zodiac) V6.
> What engine do you have in your car?  He suggested checking the oil 
> pressure
> gauge with a manual gauge and then blowing all the oil lines clean.  Keep 
> us
> advised on what happens.
>
> Andy
>
> -----Original Message-----
> From: nobbc-bounces at autox.team.net [mailto:nobbc-bounces at autox.team.net] 
> On
> Behalf Of Greg Badano
> Sent: Monday, March 15, 2010 8:15 AM
> To: North Bay British Car Club
> Subject: Re: [Nobbc] Abnormally high oil pressure
>
> HI Mike,
>
> Thanks for your reply and suggestion.  I'm due for an oil/filter change so
> will take care of that and look for that adjustment screw.
>
> Best,
>
> Greg
>
> --- On Mon, 3/15/10, Mike Gianandrea <mvg1 at verizon.net> wrote:
>
>
> From: Mike Gianandrea <mvg1 at verizon.net>
> Subject: Re: [Nobbc] Abnormally high oil pressure
> To: "North Bay British Car Club" <nobbc at autox.team.net>
> Date: Monday, March 15, 2010, 7:02 AM
>
>
> Hi Greg,
>
> I had the same problem on my TR to the point that the oil blew through my
> gauge in the dash. There is an adjustment screw on my oil filter housing 
> to
> regulate the oil pressure. I would change my oil and filter, check the oil
> for
> particlate matter, re-check the pressure, and then look for that 
> adjustment
> screw.
>
> Michael
> 64 TR4
> ----- Original Message ----- From: "Greg Badano" <gsb1159 at pacbell.net>
> To: "North Bay British Car Club" <nobbc at autox.team.net>
> Sent: Sunday, March 14, 2010 9:11 AM
> Subject: [Nobbc] Abnormally high oil pressure
>
>
>> Hello NOBBC members,
>>
>> I was out for a short drive a couple of weeks ago and noticed that my oil
>> pressure was registering abnormally high (40 PSI at idle) so I cut my
> short
>> drive even shorter.  Yesterday I started the car up and the oil pressure
> gauge
>> quickly pegged at 100+ PSI (normally it registers around 80 PSI at a cold
>> start) so I shut it down.  For what it is worth, the oil level is correct
> and
>> the coolant is free of oil contamination.
>>
>> Can any of the more mechanically minded members offer any suggestions as
> to
>> what might be going on?
>>
>> Thanks in advance for your input.
>>
>> Greg
>> '59 AC Aceca
>> _______________________________________________
>> Nobbc mailing list
>> Nobbc at autox.team.net
>> http://autox.team.net/mailman/listinfo/nobbc
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