[Fot] TR3/TR4 AMBRO OIL LEAK UNDER PRESSURE-APPARENTLY FILTER BODY Restriction

[RACER BUD]

Joe  my friend put a new engine in his MGB racecar...ran it a bit then 
changed the filter....he put on a Fram filter that fit fine, but was the 
wrong filter for the engine...he couldn't get enough oil pressure through 
the filter...taked to Huffaker..he changed filters, and all was fine...I 
later spoke to a friend who has a racecar shop...very experienced guy...He 
said to stay away from FRAM filters...
Racer Bud
----- Original Message ----- 
From: "ofbracing" <ofbracing at nefcom.net>
To: <n197tr4 at cs.com>; <fot at autox.team.net>
Sent: Friday, April 16, 2010 11:13 AM
Subject: Re: [Fot] TR3/TR4 AMBRO OIL LEAK UNDER PRESSURE-APPARENTLY FILTER 
BODY Restriction


> Joe, my TR4 race car has two oil pressure gauges, one reads before the
> filter and the other reads at the oil gallery.  In effect, one reads 
> coming
> out of the pump and the other reads after it has gone through the system.
> If everything is normal, the gauge reading before the filter is about 
> 10psi
> higher than the reading at the oil gallery.  On two occasions I have seen
> the first gauge reading much higher than normal and the second gauge 
> reading
> much lower.  The problem was a clogged oil filter and when the filter was
> replaced everything went back to normal.  My guess on the excess oil is 
> that
> if it can't get through the filter it's being forced out somewhere else.
> Don
>
> -----Original Message-----
> From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On
> Behalf Of n197tr4 at cs.com
> Sent: Friday, April 16, 2010 8:40 AM
> To: fot at autox.team.net
> Subject: [Fot] TR3/TR4 AMBRO OIL LEAK UNDER PRESSURE-APPARENTLY FILTER 
> BODY
> Restriction
>
> This one is new to me.....oil pressure appears normal at idle.
>
> At road speed (3000 RPM) oil pressure starts to build higher to 75-80 psi
> depending on the relief valve setting, and eventually settles back as the
> engine reaches operating temps....about a 10 mile run..
>
> Upon return to garage the area around the filter body is wet and about 1/3
> of
> a quart of oil has migrated to the transmission area and pools under the
> car...a lot of oil.
>
> I initially suspected the rear crank seal, but the amount of oil around 
> the
> filter body support tends to dispel that idea.
>
> I now suspect a restriction of some kind, but it would be good if anyone 
> has
> experience this before and has a specific cause.
>
> Outside of that, the AMBRO seems to be a remarkable car, so far, but needs
> high speed runs with extreme cornering forces as part of the sorting
> process.
>
> Looking forward to any experience or suggestions.
>
> Thanks....Joe A
>
>
>
>
>
>
>
>
>
>
> =
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