1963 AP5 Posted January 25, 2022 Share Posted January 25, 2022 Quick question that I hope someone can answer for me. The Toyota SC14 supercharger has three hose fittings that I think are there to vent the gearbox and the forward bearing housings. Can these simply be vented to atmosphere or do they need to be plumbed into the manifold on the low pressure side of the supercharger? My supercharger is minus the factory pipework so I am not sure where these are connected on a factory set up. Quote Link to comment Share on other sites More sharing options...
GregT Posted January 25, 2022 Share Posted January 25, 2022 the two at the drive end look like in and out for oil circulation and might be hooked up to an engine top end feed. The back one is a vent imo - and should go to atmosphere. Don't put it to a vacuum area as you'll draw out any lube. Had a supercharged MR2 but never paid attention to how the blower was lubed. Should be a manual on line. Quote Link to comment Share on other sites More sharing options...
HighLUX Posted January 25, 2022 Share Posted January 25, 2022 http://i40.photobucket.com/albums/e225/filonin_2/ACVpreviaandmr2.jpg 2 Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted January 25, 2022 Share Posted January 25, 2022 1 hour ago, GregT said: the two at the drive end look like in and out for oil circulation and might be hooked up to an engine top end feed. The back one is a vent imo - and should go to atmosphere. Don't put it to a vacuum area as you'll draw out any lube. Had a supercharged MR2 but never paid attention to how the blower was lubed. Should be a manual on line. SC units are self contained and filled with gear oil (or Toyota Genuine SC oil) defintely don't recommend plumbing the engine oil in :p Quote Link to comment Share on other sites More sharing options...
GregT Posted January 25, 2022 Share Posted January 25, 2022 i stand corrected. thank you. Quote Link to comment Share on other sites More sharing options...
1963 AP5 Posted January 26, 2022 Author Share Posted January 26, 2022 5 hours ago, HighLUX said: http://i40.photobucket.com/albums/e225/filonin_2/ACVpreviaandmr2.jpg Perfect, thanks so much Quote Link to comment Share on other sites More sharing options...
HighLUX Posted January 26, 2022 Share Posted January 26, 2022 Im going to be at my lockup tomorrow arvo so will look at the plumbing of the lines on my 1GGZE and report back 1 Quote Link to comment Share on other sites More sharing options...
1963 AP5 Posted January 26, 2022 Author Share Posted January 26, 2022 Thanks, I dont have the air control vale as described in the Previa info that you supplied as my supercharger did not come with it included. I am wondering under what conditions the ECU activates this valve. It looks like it keeps the ports sealed when it is not energised and when the ECU energises the solenoid it vents the bearing housings to atmosphere. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted January 28, 2022 Share Posted January 28, 2022 I plugged all those on mine. I had no idea what they were for, and when I swapped from a 32/36 to a 350cfm Holley they were in the way of the larger carburetor adapter plate. Quote Link to comment Share on other sites More sharing options...
tortron Posted January 28, 2022 Share Posted January 28, 2022 https://www.mr2oc.com/threads/what-are-the-small-air-ports-on-the-sc12-sc14-for.411335/ Sounds like to equalise the pressure Quote Link to comment Share on other sites More sharing options...
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