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Building oil pressure before starting

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Old 06-25-14, 09:16 AM
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Building oil pressure before starting

So I've been doing a lot of searching. Couldn't find much rotary specific, if I did it was mostly FC specific. I found a lot of info on SupraForums and HT.
There has been mixed answers but a lot actually lead to, "just start the car." But most topics usually are fresh complete rebuilds with assembly lube.

Anyways. Just finished my single turbo build; well enough for the initial start anyways. Its been about 1 year it has sat without oil.
I did not pull the engine apart or out, simply replaced parts.

Am I correct in thinking I should be pulling the EGI fuse and dry cranking the motor before actually starting it?

Does the motor even build oil pressure this way?

I have cranked it over for maybe 10 seconds now. Checked the filter and it's dry. Should I keep going until it finally builds pressure or start it up and squeeze my *** checks while I wait for response from the gauge?
Really wanted to check for line leaks before starting it.

Even worse it's on a rough base map on a newly aquired series 1 AEM so I can't even be sure it'll even idle.

Just looking for guidance from people with similar or previous experience.

Thanks.
Old 06-25-14, 09:20 AM
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Pull the spark plugs so you dont heat up the starter and stress the battery as much. You should be able to create at least 20psi of oil pressure this way.

The important part is being sure no fuel is being injected while priming...you can pull egi fuse or unplug the crank position sensors or unplug the fuel pump.
Old 06-25-14, 09:50 AM
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With some aftermarket ecu's such as the haltech,(not sure if thPFC has this function) there is a proceedure which cuts fuel to the engine while cranking in order to de-flood the engine. This is activated be giving 100% throttle while cranking. This function can also be used to build oil pressure before the engine actually fires.
Old 06-26-14, 02:09 PM
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If you have a dry dual oil cooler setup it will take up to a minute of cranking to get the oil system primed. Just give the starter a break every 30 seconds so it doesn't get cooked and watch your oil pressure gauge. Oil pressure will build up at one point...
Old 06-26-14, 11:42 PM
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Originally Posted by K-Tune
Pull the spark plugs so you dont heat up the starter and stress the battery as much. You should be able to create at least 20psi of oil pressure this way.

The important part is being sure no fuel is being injected while priming...you can pull egi fuse or unplug the crank position sensors or unplug the fuel pump.
Pulled the plugs and it spun much much faster. Built some pressure.

Originally Posted by jetlude
With some aftermarket ecu's such as the haltech,(not sure if thPFC has this function) there is a proceedure which cuts fuel to the engine while cranking in order to de-flood the engine. This is activated be giving 100% throttle while cranking. This function can also be used to build oil pressure before the engine actually fires.
I believe all rx7s after 88 do this also.

Originally Posted by mono4lamar
If you have a dry dual oil cooler setup it will take up to a minute of cranking to get the oil system primed. Just give the starter a break every 30 seconds so it doesn't get cooked and watch your oil pressure gauge. Oil pressure will build up at one point...
Did exactly this and it worked! Thanks guys!
Old 06-27-14, 12:59 AM
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I pulled the oil feed to the turbo and ziptied a clear bag around it to tell when pressure was building. Was able to get a good amount out but all the oil was extremely black. I'm guessing that's all the old oil that was stuck in there.
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