Serp Oil Pressure sender

[Richard 858]

Richard 858 said:

Right Chaps, now fitted this one (as per Dave ChimpOnGas) 0-80 psi, £26.85 Ebay - supplied by a company called Technisol (DM Auto & Marine Parts) near Cambridge. It's actually from an outfit called ISSPRO from Oregan in the U.S.
As far as fitting goes it's straight forward, just needs earthing. It is however approx 50% longer than the original so not much room between terminals & cross brace, but it does fit. As explained before my car is on jacks for fettling so readings are stationary in a partly heated garage. Engine is a N/A 450 decatted but otherwise standard, running on Millers CSS 20/60 oil.
Cold Idle: 65 psi
at Water Temp 60 degrees - Idle: 55 psi & @2500 rpm: 70 psi
at Water Temp 80 degrees - Idle: 45 psi & @2500 rpm: 65 psi

I'll keep this one in & see how it does when back on the road (with SC) in the spring.

Hope this helps.

Edited by Richard 858 on Wednesday 11th December 14:02

As a very late follow up comparison & after covering approx. 2,000 miles (after supercharger fitted and on the same oil) since fitting this sender the readings have dropped across the range by 5 psi on average, so still happy with the outcome.

[Colin RedGriff]

EddyP said:

Colin RedGriff said:

I have one of those and it works great. Just need to make sure the thread seals properly.

I ran the earth wire from the earth point in the offside wheelarch

Hi Colin

Is your gauge a 0-90psi one? or 0-80psi?

Thanks

0-90

[EddyP]

Great thanks, I'll get one ordered up then

[WokingWedger]

Right, just fitted it.

Cold idle before fitting approx. 38 psi (13 deg C air temp)

After 60 psi at idle (13 deg C air temp)

Hot idle 58 ish Hardly any difference to cold !

A bit suprising, but I suppose if its running higher and being regulated by the pressure relief valve it can be rights.

[Sardonicus]

You won't be idling at 60 psi HOT I can tell you that.

[WokingWedger]

Could be 55 psi hot, but not much less.

I am a bit concerned it doesn't vary more !

Edited by WokingWedger on Saturday 28th March 16:54

[Tangoed]

WokingWedger said:

I have just ordered this :-

http://www.ebay.co.uk/itm/370678852601

I will let you know if it works out okay on a 0 to 90 PSI gauge.

It needs a separate earth lead.

Can anybody describe the best / nearest suitable earth point ( engine or chassis ?)


Cheers

Just got one of these myself. Old unit use to read 30psi on from cold, now reads 60psi. I must say a doddle to fit

[Danblez]

Sorry for digging this up again but I have fitted a new ebay special sender and have some odd results

http://www.ebay.co.uk/itm/251091382046?_trksid=p20...

I replaced this due to varying oil pressure, the old sender was always a little wayward from time to time but pressure varied between 10 and 50psi.

I fitted the new one above at the weekend and now have a very steady guage. It rises quickly and doesnt wander at all.

The sender is apparently a 100PSI 330-24
However it is now reading
0psi with ignition on but not running
70psi cold idle and 2.5k revs.
45psi hot idle and 65psi at 2.5k revs.

Now should I live with this in the same way I lived with the old gauge never knowing what the actual pressure was and act only if something odd happens or do something about it?

Edited by Danblez on Tuesday 9th February 13:49

[Bassfiend229hp]

Goaty Bill said:

Bassfiend229hp said:

The chuffing sender for my new oil pressure gauge is £120! That's twice the cost of the gauge itself ...

Ask for a lower grade of gold plating?

One advantage of being a slow git when it comes to getting my dash done is the sender for my oil pressure gauge has come down from £120 to 'only' £86!

[carsy]

Danblez said:

Sorry for digging this up again but I have fitted a new ebay special sender and have some odd results

http://www.ebay.co.uk/itm/251091382046?_trksid=p20...

I replaced this due to varying oil pressure, the old sender was always a little wayward from time to time but pressure varied between 10 and 50psi.

I fitted the new one above at the weekend and now have a very steady guage. It rises quickly and doesnt wander at all.

The sender is apparently a 100PSI 330-24
However it is now reading
0psi with ignition on but not running
70psi cold idle and 2.5k revs.
45psi hot idle and 65psi at 2.5k revs.

Now should I live with this in the same way I lived with the old gauge never knowing what the actual pressure was and act only if something odd happens or do something about it?

Edited by Danblez on Tuesday 9th February 13:49

These electric senders are only ever going to give a guestimate at best. I fitted an ebay one and my gauge never moves from 60. Hot cold idle or 6k rpm. Its better than having a duff gauge reading zero tho.

If you want a proper accurate reading you need to fit a mechanical gauge.

[Bassfiend229hp]

carsy said:

If you want a proper accurate reading you need to fit a mechanical gauge.

Or you fit one of these...

http://www.demon-tweeks.co.uk/motorsport/gauge-sen...

...and one of these...

http://www.demon-tweeks.co.uk/motorsport/gauges-au...

That should be more accurate than a mechanical gauge.

Phil

[Danblez]

I don't necessarily want an accurate gauge. I just wonder if it is a bit foolish not having one which is a bit more indicative of what is happening. Or is it good enough to warn me it it suddenly dropped?

[Bassfiend229hp]

Danblez said:

I don't necessarily want an accurate gauge. I just wonder if it is a bit foolish not having one which is a bit more indicative of what is happening. Or is it good enough to warn me it it suddenly dropped?

This has been a discussion for a long time...

There's one camp that says "I know it's wrong but I'll worry if it starts doing something odd" and another that says "I want to know what's going on".

I'm in the latter camp because IMO if the gauge is wrong then what's to stop it being even more wrong one day?

Phil

[Danblez]

There is always the light, right?

Edited by Danblez on Tuesday 9th February 16:48

[Bassfiend229hp]

Danblez said:

There is always the light yeah?

When the light comes on it's too late...

Phil