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Underbody braces, turbos and more!

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 Post subject: MK2 Rebuild
PostPosted: Sat Mar 28, 2015 4:24 pm 
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Joined: Fri Dec 05, 2014 11:23 pm
Posts: 143
Location: SK
Where can I get good rings and bearings? I want to keep the factory turbo, manifolds, ecu and whatnot, what can i do when rebuilding to make more power?


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 Post subject: Re: MK2 Rebuild
PostPosted: Sat Mar 28, 2015 11:07 pm 
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Joined: Tue Jul 03, 2012 12:19 pm
Posts: 344
Location: vancouver island, canada
like any engine. make the head flow better and cam it. from there if you wanted you can bump compression. but personalty i would get a boost controller and run about 12-14 psi boost on the stock compression.

_________________
92 geo metro 1.0L 5 spd. 2 dr Soon to be my turbo swap car. (Dragonfly) sold
91 pontiac firefly, 1.0L 2dr auto. stock. (The crap can) sold
91 chevy sprint. 1.0L 5 spd. My first turbo swap. (Red rocket) now the purple nurple
95 geo metro. 1.3L auto parts car. (Scrap)
91 chevy sprint turbo, blueboy keeping it "stock"


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 Post subject: Re: MK2 Rebuild
PostPosted: Mon Mar 30, 2015 3:10 pm 
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Joined: Fri Dec 05, 2014 11:23 pm
Posts: 143
Location: SK
I plan on getting a 3tech head package. I would like to increase compression by shaving the head, but I want the engine to stay non interference.

I want to re-use the factory pistons to keep the engine non-interference.

What is needed to increase the boost? I don't want to have to start messing with the CTS and others. I want to keep the car reliable and fuel efficient, and squeeze as much power as I can. This will be my daily driver.

The drivetrain has 183,000km. Should I look into rebuilding the turbo? I know the car ran fine until the crank gear broke from not being tourqued properly. How long do these turbos last?


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 Post subject: Re: MK2 Rebuild
PostPosted: Mon Mar 30, 2015 5:39 pm 
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Joined: Tue Jul 03, 2012 12:19 pm
Posts: 344
Location: vancouver island, canada
I run 14 psi on one of mine. All i used is a manual boost controler to increase boost. I didnt do anything else. Like the CTS mod. Runs at 11.4:1 a/f wot so the injectors can keep up no problem. But if you plan it increasing the compression you might not be able to run that much boost. I know you can shave 0.040 off the head and it will still be non interference But i would just talk to 3tech about that and will will give you the best advise on that. As for the turbo its hard to say. Wouldn't know until its off. It should spin freely I know mine I can just blow on it and it starts turning. But if you deside to do the turbo spend the $ and get a OEM rebuild kit.


One thing to add is on mine at 14 psi with the timing I run I need to burn 94 octane gas. But it pulls hard and I got about an extra 100km to a tank running that gas compared to normal gas/timing.

_________________
92 geo metro 1.0L 5 spd. 2 dr Soon to be my turbo swap car. (Dragonfly) sold
91 pontiac firefly, 1.0L 2dr auto. stock. (The crap can) sold
91 chevy sprint. 1.0L 5 spd. My first turbo swap. (Red rocket) now the purple nurple
95 geo metro. 1.3L auto parts car. (Scrap)
91 chevy sprint turbo, blueboy keeping it "stock"


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 Post subject: Re: MK2 Rebuild
PostPosted: Wed Apr 01, 2015 3:32 pm 
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Joined: Fri Dec 05, 2014 11:23 pm
Posts: 143
Location: SK
Ok thanks.

I will be needed a new crank shaft as the gear and keyway is all torn up. I was under the impression that the turbo crank was different from NA but I saw another thread today saying they are the same. Can anyone confirm this?


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 Post subject: Re: MK2 Rebuild
PostPosted: Sat Apr 04, 2015 12:34 pm 
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Joined: Fri Dec 05, 2014 11:23 pm
Posts: 143
Location: SK
Parts I have already:

New radiator
New oil pump
2 complete gasket sets
New timing belt and tensioner

Parts I plan on ordering:

Bottom end bearings and rings
Mikes no-blow high performance head gasket (eBay, anyone have experience?)
New water pump
Ignition tune up and air filter


What am I missing? I want to be thorough


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 Post subject: Re: MK2 Rebuild
PostPosted: Sat Apr 04, 2015 2:46 pm 
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Joined: Fri Jan 07, 2005 2:46 pm
Posts: 883
Location: Arizona
Don't waste your money and labor on No-blow head gaskets . All I ever heard is that they blow big time and then you get Fel-Pro to fix it . Just use Fel-Pro to start with and enjoy your engine worry free for next 100K . Fel-Pro has been working in all my engines for many times more then that , including Mk1 T3 running up to 15lbs of boost


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 Post subject: Re: MK2 Rebuild
PostPosted: Sat Apr 04, 2015 4:16 pm 
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Joined: Mon Dec 01, 2003 12:47 pm
Posts: 11669
Location: columbus, ohio
the mark dvorak "no blow" head gaskets had a faulty crush ring at the oil supply interface and they'd start leaking at the front corner of the head.

they did not "blow" per se but they are known for the oil leak as a failure mode. :blackeye:

i second using felpro head gaskets. my turbo3 engines have held up great with those and my blue monster turbo3 runs 21 pounds of boost pressure without issue on a felpro head gasket.

_________________
1991 Blue Geo Metro Convertible highly modified 1.0L Turbo3 5 spd. - 1991 Red Geo Metro Convertible customized with a Twincam 5 spd.

My Turbo3 Project
My Cardomain Page -Ol' Blue
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 Post subject: Re: MK2 Rebuild
PostPosted: Mon Apr 13, 2015 3:05 pm 
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Joined: Fri Dec 05, 2014 11:23 pm
Posts: 143
Location: SK
Ok thanks guys.

I am still wondering about the crankshaft. The crank is damaged where the gear connects, the key is warped badly and the keyway is damaged. I know I will need a new crank and gear but I am wondering if there is any differences between the turbo and NA crankshafts, also is there any differences year to year?


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 Post subject: Re: MK2 Rebuild
PostPosted: Tue Apr 14, 2015 9:15 pm 
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Joined: Tue Feb 13, 2007 10:28 pm
Posts: 1170
Location: So Cal, USA
Put up some pics. If the keyway is pickered, doesn't mean you need a new crank.
The key (it's called a woodruff key) can easily be replaced.
The woodruff key is mainly used for centering the gear on the crank and
is not designed to, nor should it take the load of spinning the gear.
The crank pulley bolt is what fastens the crank timing gear using
a specified amount of torque.
The idea with a keyway that is damaged, is to install the crank gear
with a new woodruff key and making sure it is in the correct
position, tighten the crankshaft bolt to specs and you should
be fine.
It's usually one side of the keyway on the crank that gets damaged,
since the crank only rotates one way. It's possible to fill in the damaged
area with epoxy or JB weld to fill the void, which will help keep the
woodruff in position while installing the gear. If the gear is damaged
in the keyway, it's best to replace it.


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 Post subject: Re: MK2 Rebuild
PostPosted: Tue Apr 14, 2015 9:23 pm 
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Joined: Tue Feb 13, 2007 10:28 pm
Posts: 1170
Location: So Cal, USA
Quote:
I would like to increase compression by shaving the head


Low compression will allow you to add more boost with less risk of detonation.
This is essential for your turbo motor.


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