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1979 117c Turbo?

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darrylw1

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1979 117c Turbo?

Post02 Jan 2008, 11:43

I have a 1979 117c and would like to gain some more power.At presant im undecided whether to find a Piazza turbo setup or use a toyota sc 12 or sc14 supercharger out of an mr2. I would like to know what the experts think. regards Darryl.
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archangel62

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Post03 Jan 2008, 05:32

Turboooo!! More efficient, and more high end. Possibly consider the smaller Garrett "Disco Potato" turbo - GT28RS with the smaller exhaust housing, I forget the exact model number but I think it has an AR of 0.48 or something versus 0.60.... Argh, these numbers are making my head hurt already, I'm sure I just made an idiot of myself. But yeah, the smaller GT28RS. You can pick one up around the $1300 mark in good condition from some quality turbo rebuild places.

Or maybe on the cheap, a standard T28 in good condition from an SR20DET Silvia etc for around $400-$500.

You could probably start your own thread to be honest, this could lead to lengthy debate lol
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Twincam needs: surge tank, EFI lines, TPS, recored radiator, hoses, assemble the ECU (50% done).
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bad 44u

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Post03 Jan 2008, 15:09

im pretty sure the piazza setup wont work because the manifold has the sameport spacing as the g series while the twin cam has even spacing.
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archangel62

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Post08 Jan 2008, 00:37

Shit, didn't see that. Yeah I'd say that's a definite no-go on the Piazza turbo gear fitting a twincam, unless you get the exhaust header welded to shit, which defys the point of not just getting a T28 and having an existing header modified.
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Twincam needs: surge tank, EFI lines, TPS, recored radiator, hoses, assemble the ECU (50% done).
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GeminiCoupe

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Post08 Jan 2008, 15:42

Elio, .48 rear housings belong on Kei cars. A .64 rear housing is perfect for a 2L.
Project One - 1976 TX Gemini Coupe G200z Turbo
Daily - S15 200SX, 13.29 @ 107mph
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archangel62

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Post19 Jan 2008, 06:22

Hmm, how about 1.8lt? I guess the cylinder capacity exhaust flow is offset by the higher revs of the 180W. I don't want any lag, just because of hills/drift etc.... Reckon the .60 would be ok?
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Twincam needs: surge tank, EFI lines, TPS, recored radiator, hoses, assemble the ECU (50% done).
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darrylw1

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Re: 1979 117c Turbo?

Post28 Nov 2012, 17:38

Did go and install the mr2 supercharger,went great but oil ozzed out of every joint of the old motor.Decided to add 200 lazy horsepower by installing a late model 3.8 v6 ecotec with the g4 link computer,and 5 speed from a commadore . I had to have a custom light weight fly wheel made,and custom headers to squeeze past the steering box Now Im happy,and its a blast to drive,and is suprisingly economical to run. Thanks to all the advice from forum members. Darryl.
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BackToTheGem

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Re: 1979 117c Turbo?

Post28 Nov 2012, 20:01

Wow a moo powered 117!

I've heard the valve stem sealing isn't the best (well pretty much non existent) in the DOHCs so you were probably pressurising your sump with a bit of boost. A decent catch can or oil air separator probably would of helped a fair bit with the oil leaks.
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IZU069

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Re: 1979 117c Turbo?

Post29 Nov 2012, 22:52

Good to see a conclusion after 4+ years.

As to stem seals, they are no different to other Isuzus and most Jap cars. I suspect it was simply a worn engine, else previously worked by non-knowledgables.

As to catch cans, they shouldn't be required. I don't think the 390HP turbo G200W needed one.
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cul8r

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Re: 1979 117c Turbo?

Post11 Dec 2012, 16:38

Any chance of some pictures of the setup?
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darrylw1

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Re: 1979 117c Turbo?

Post14 Dec 2012, 04:44

which set up pictures would you like ? supercharged g200,or the v6.
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cul8r

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Re: 1979 117c Turbo?

Post17 Dec 2012, 17:53

Supercharged of course!
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darrylw1

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Re: 1979 117c Turbo?

Post09 Jan 2013, 16:43

Ill dig out some of those old pics and post them later.

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