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What is this project? Its an engine build with a discussion and details about options and trade offs building an engine. Hopefully heaps of photos and video. Why? Because I couldn’t find the details I wanted online in one place and heaps of builds leave out the discussion on why they picked the parts and what flow on effects it makes. Plus after @Joker posted about Facebook YouTube take over I saw a motor and it seemed like a good idea at the time. Whats with the name? It came for a PM from @PBMS as the base engine for this is a EJ207 W block with a suspected cracked piston that on one has looked at yet. Until it’s opened there’s no idea on what’s inside. When does it start? It started March 2019. Where is it? it will be in this topic mostly and across Possum Bourne MS YouTube etc. before the engine is assembled I hope to video in 4K all the parts and write up the reasoning behind each How long? over the next few months since the engine is a donor the cars stays on the road. Whats the plan? Build a great motor with well through your part selection. Everything is pretty much open to ideas as things are added to the list. Initial thoughts are: - build it for around 800hp (was 600hp) and then street it about 500whp. - Stay 2.0 as the cost of stroking it is higher and I can’t seem to own a car that won’t rev out to at least 8,000 rpm - CNC the heads since it isn’t that much - Cams around 264 but has dual AVCS so maybe bigger, but needs to be streetable - close deck maybe depends on block condition
So EFR turbos are sensitive to pressure in the drain system. Eg if you have positive crank case pressure they will push oil past the seals. 14-60psi operating pressure 20degrees rotation from vertical You really need 12mm or larger drain and a larger diameter hose/pipe to the sump. Do NOT use banjo or threaded fittings for oil drain. -10an or smaller is suited to scavenger pump oil return like Porsche. 3/4 hose/pipe recommended a small oil tank under the turbo can help with frothing oil and cleaner return. Thinking of billet fuel filter with filter cove removed so has 50mm diameter chamber to allow foam to settle. More info https://www.miataturbo.net/diy-turbo-discussion-14/psa-efr-turbo-oil-drain-information-read-before-designing-your-oil-drain-93944/ https://turbosource.com/blogs/news/borgwarner-efr-technical-installation-guide This may apply to newer garrret turbos as well. fittings https://www.aliexpress.com/item/32404284074.html https://www.aliexpress.com/item/33052615896.html Thanks to @Andy_Mac for putting me onto all this.