Just wondering, since my newly rebuilt one sits at around 10psi hot idle, a bit lower than a standard ea81 and wondering if its because of the turbo oil supply coming straight off the pump.

Or maybe the fact that it hasn;t got the factory oil cooler and the oil is getitng too hot.

 

Anyway, would be good to have some values to compare mine to.......

 

10psi hot idle

80ish psi cold at 1500

about 30-35 at 2000rpm hot

I'll check tomorrow when I'm around my car. Have you checked the FSM?

Just looking at the FSM now, it gives specs for the oil pump (ie pressure at set discharge rates and shaft speeds) but not for the oil pump on the engine.

 

All these specs tell me, is that if the flow rate is limited to 4l/min, with the pump rotating at 500rpm (engine 1000rpm) then the output pressure should be 50psi when the oil is between 75-85deg C. Also gives a similar spec at 21l/min and 2500rpm pump speed..... 57psi.

 

Very handy info.... if i wanted to design a new pump, or bench test the existing one!

 

Not so handy if i want to know "is my oil pressure ok?"

 

 

On another note, how common are the oil coolers for the ea81t over there? They don't seem to exist at all over here.

If anyone has a spare one, or knows where one is, i would be very keen to get my hands on it.....

All EA81T's came stock with oil coolers here. But EA81T's are rare, so it's still very hard to find them.

 

GD

second generation mazda RX-7s all had wonderful oil coolers right down in front, most in the junkyards over here are in good shape. they are about 60cm? long or so, about 10-15cm high, and about 4-5 cm thick. (rough estimates combined with rough metric conversions.. but its an idea of the dimensions at least) I dont know exactly what type of fittings it had, but my family and I have used them as bolt-ons for datsun Z-cars many times.

On another note, how common are the oil coolers for the ea81t over there? They don't seem to exist at all over here.

If anyone has a spare one, or knows where one is, i would be very keen to get my hands on it.....

 

I pulled mine off when I did my ej22 conversion. If I saved it I will reply here when I get back home from my trip.

How do you check this?

I pulled mine off when I did my ej22 conversion. If I saved it I will reply here when I get back home from my trip.

 

That would be brilliant, thanks!

I'll check tomorrow when I'm around my car. Have you checked the FSM?

 

Have you had a look at this yet?

 

Id quite like some figures from other ea81s (turbo or non turbo) for comparison too....

 

I am thinking my low pressure is caused by too hot oil (makes sense it would be hotter, same setup as ea81 with a big oil heater (Turbo) on it...) but would like some more numbers to compare to....

 

Also, has anyone noticed how long it takes for your oil to come up to temp (ie oil pressure stops dropping)? My pressure will continue to slowly drop over around 45mins of around town driving....

My wagon needs its exhaust reconnected, clutch replaced and an alignment. When all that is fixed, I'll have numbers for you.