oil pressure sender
#21 Re: oil pressure sender
Hi Paul..check out Merlin Motorsports......Steve
Steve
69 S2 2+2 (just sold) ..Realm C type replica, 1960 xk150fhc
69 S2 2+2 (just sold) ..Realm C type replica, 1960 xk150fhc
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#22 Re: oil pressure sender
I'm sure there must be a reason, but don't know why nylon hose is favoured? My mechanical guage came from SNG, with braided hose, and works perfectly. Figures were compared to those from a propfessional capillary system strapped to the door frame while being driven. Figures were identical.Fuel.inj wrote: ↑Sat Jan 09, 2021 7:32 pmI read with interest these posts and others on this forum regarding oil pressure senders and gauges. I am of the old fashioned mechanical bias and have been contemplating replacing my electrical setup with a capillary system. My S2 on a fairly low mileage engine shows about 45-50 when cold and then drops back a little.
I note that MC Wilkinson sell a kit but shows it only with a braided hose and some owners recommend nylon.Are there any other suppliers members may know of these days.
Paul.
Malcolm
I only fit in a 2+2, so got one!
1969 Series 2 2+2
2009 Jaguar XF-S
2015 F Type V6 S
I only fit in a 2+2, so got one!
1969 Series 2 2+2
2009 Jaguar XF-S
2015 F Type V6 S
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#23 Re: oil pressure sender
Out of interest Malcolm, where exactly did you route the braided hose through the bulkhead as I would prefer it to nylon if I do buy a mechanical system.
Paul.
Paul.
Paul.
1971 S2 FHC (Opalescent Blue)
1990 Mercedes Benz 260E
1972 Saab 96 V4
A number of Nortons.
1939 Triumph T100
1971 S2 FHC (Opalescent Blue)
1990 Mercedes Benz 260E
1972 Saab 96 V4
A number of Nortons.
1939 Triumph T100
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#24 Re: oil pressure sender
The only thing the braid is bringing to the party here is some abrasion protection and possibly a little heat insulation. The hose underneath is probably nylon anyway. At the pressures generated, it isn't a case of stopping the hose from ballooning out and thus under reporting the pressure. Nylon is chosen because it is flexible (more so than a capillary made of similar sized copper tubing), it is inert chemically and engine bay temperatures are way too low to affect its mechanical properties.
kind regards
Marek
kind regards
Marek
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#25 Re: oil pressure sender
I have always slipped a plastic wrap or slit tube over any copper capillary tube to prevent electrical shorts behind the folded panel. I’d do the same for braided.
Unlike a closed brake system, where maximum sustainable pad pressure would be temporarily compromised before bursting, a ballooned nylon capillary wouldn’t reduce line pressure or gauge pressure in an open system with essentially infinite oil volume and pump stroke. That’s why a ballooned aortic aneurysm or cranial vessel holds pressure until it bursts.
Incidentally (and probably weirdly) I always think of the aorta when working on the oil pioes in the sump. Why? Because apart from doing similar jobs, the average aorta running down the back of your chest is very roughly the size and shape of an XK oil pump feed pipe.
Unlike a closed brake system, where maximum sustainable pad pressure would be temporarily compromised before bursting, a ballooned nylon capillary wouldn’t reduce line pressure or gauge pressure in an open system with essentially infinite oil volume and pump stroke. That’s why a ballooned aortic aneurysm or cranial vessel holds pressure until it bursts.
Incidentally (and probably weirdly) I always think of the aorta when working on the oil pioes in the sump. Why? Because apart from doing similar jobs, the average aorta running down the back of your chest is very roughly the size and shape of an XK oil pump feed pipe.
1E75339 UberLynx D-Type; 1R27190 70 FHC; 1E78478; 2001 Vanden Plas
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#26 Re: oil pressure sender
Sorry I didn't answer earlier Paul, I missed the post somehow.
From the sender area, the hose goes round the front of the carbs then back along the frames
It then goes through the top of the bulkhead on the drivers side above throttle linkage
Then round the back of the drop down panel into the guage
Hope this helps
Malcolm
I only fit in a 2+2, so got one!
1969 Series 2 2+2
2009 Jaguar XF-S
2015 F Type V6 S
I only fit in a 2+2, so got one!
1969 Series 2 2+2
2009 Jaguar XF-S
2015 F Type V6 S
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#27 Re: oil pressure sender
Thanks Malcolm. That’s very helpful.
Regards, Paul.
Regards, Paul.
Paul.
1971 S2 FHC (Opalescent Blue)
1990 Mercedes Benz 260E
1972 Saab 96 V4
A number of Nortons.
1939 Triumph T100
1971 S2 FHC (Opalescent Blue)
1990 Mercedes Benz 260E
1972 Saab 96 V4
A number of Nortons.
1939 Triumph T100
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