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Scion tC 1G Forced Induction Turbo and supercharger applications...

?.. an another question!

Old Nov 30, 2009 | 09:07 PM
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Default ?.. an another question!

what size is the bolt for the oil feed line, the one thats connected to the motor??

Last edited by scion_andrew; Dec 1, 2009 at 03:21 AM.
Old Nov 30, 2009 | 09:25 PM
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Originally Posted by scion_andrew
i have no idea where it goes please help!
You also need the Greddy pressure sensor harness as well. The little yellow connector from it goes to the e-manage. The nipple on the sensor gets a vac source. DOne!
Old Nov 30, 2009 | 09:28 PM
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Ya i have the harness to!

so it jus hooks up to my vac block?

thats easy thank u!
Old Dec 1, 2009 | 03:22 AM
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Anther queston please help!
Old Dec 1, 2009 | 03:47 AM
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1/8th npt to head for oil feed..

just a tip, the threads on the head are tappered so its a good idea to run a tap through it. peep sig and thats exactly how to do it, just not as dirty sounding...lmao
Old Dec 1, 2009 | 07:04 AM
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Originally Posted by crush02342002
1/8th npt to head for oil feed..

just a tip, the threads on the head are tappered so its a good idea to run a tap through it. peep sig and thats exactly how to do it, just not as dirty sounding...lmao
NPT threads are tapered for a very good reason. I'd recommend using teflon paste or oil as a lubricant to allow the male fitting to seat tightly enough into the tapered female threads to form a leak-free seal rather than chasing them with a tap and using teflon tape to substitute for the superior metal-metal seal that's been lost by tapping out the NPT thread taper.

The only reason for chasing those threads would be if your male fitting is too large to thread sufficiently deep into the taper-threaded female orifice to adequately secure the male fitting and provide a leak-free union. In which case you should chase-tap only to the minimum depth required to secure the male fitting. In this case, 1/2" should be more than adequate.
Old Dec 1, 2009 | 07:16 AM
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you normally can only get two to three threads in before it gets iffy on when the fitting will break...i highly recomend to tap it all the way so as to get more threads in the head and not break the fitting into the head...thats a nightmare, just ask the guys in my sig. i think one of them broke a fitting in their head and had to drill it out cause they were trying to make sure they got more threads in so it wouldnt leak on em.

but yeah deff some teflon tape or thread sealer is a must.

me personaly i didnt tap mine but i know where they are comeing from cause mine maybe got two or three threads in but it sealed and i didnt break anything. if using brass fittings they break fairly easily so take caution when doing this install.
Old Dec 1, 2009 | 08:45 AM
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I guess it's a case by case issue since I had no reason to tap mine either. I got plenty of thread engagement and leak-free seal with nothing but motor oil on the threads. If I couldn't get at least 3 full turns into the head, I'd probably chase the threads a little more. IIRC the oem OPSU has little thread engagement. Methinks it may be more a problem of people trying to fully seat the NPT fitting as one would seat a bolt. Snug tight is all you need here.

I can certainly sympathize with the plight of those who've broken an oil fitting off in the head. I have a long history of stripping/breaking all sorts of fittings, bolts, etc. during my torque-arm calibration years. It still happens, but rarely.
Old Dec 1, 2009 | 02:18 PM
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The only reason it feels like its getting too tight with a few threads is because you are using the wrong type of pipe thread joint. Contrary to popular belief threads used on most imports that are associated with pipe thread are not 1/8 NPT (national pipe thread) they are in fact 1/8 BSPT (British Standard Pipe Thread) BSPT is tapered where as NPT is a straight thread. They obviously both seal on tapered threads but how they do it is different.
Old Dec 1, 2009 | 02:19 PM
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Originally Posted by scion_andrew
what size is the bolt for the oil feed line, the one thats connected to the motor??
Actually it's a 1/8 BSPT fitting.
Old Dec 1, 2009 | 04:18 PM
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your oil lines come with the 1/8 BSPT right Paul?
Old Dec 1, 2009 | 05:08 PM
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Originally Posted by highvoltage1
your oil lines come with the 1/8 BSPT right Paul?
Yes sir!
Old Dec 1, 2009 | 06:30 PM
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its just not a common thing to see...atleast iv never seen it local to me and its just as easy to get an 1/8th npt to fit. but if you can find the part and order it go for it, do it right the first time.
Old Dec 1, 2009 | 06:36 PM
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Originally Posted by paul_dezod
Yes sir!
Yippy skippy looks like i wont have a problem then. I was worried!
Old Dec 1, 2009 | 08:00 PM
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Not the fittin guys the metal part that u have to unscrew to put the fittin
Old Dec 1, 2009 | 08:03 PM
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1/8" NPT to -4an fitting.
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