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Underbody braces, turbos and more!

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PostPosted: Wed Jan 13, 2016 3:34 pm 
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Joined: Sat Oct 24, 2015 11:10 pm
Posts: 27
Location: Santaquin utah
So I searched a couple different places and came up with the same ignition coil, so I looked at the one at the parts store and it had two male connections, instead of the two wires you bolt on. I'm having what I believe is spark plug blow out. Replaced the plugs wires cap and rotor, still having the problem. Cleaned a few grounds gapped my pligs down to 40 from 46, same problem. Is there a direct bolt on aftermarket coil available? I'm not very familiar with the electric part of cars, but some I am looking at say like 100:1 turn ratio. Obviously that sounds vehicle specific. What's the turn ratio of a sprint turbo?? Thanks.

Update: running on stock boost levels, gapped plugs to .030 and is running good again, would still like to upgrade coil

Update 2: installed a blaster 2 msd coil, and ordered a .8 ohm balast resistor (required with point style ignitions), has what I think is still spark blowout off and on, is worse when cold. Even with plugs gapped to.030... new plugs, new coil, wires, cap and rotor. Clean grounds, new battery and cable. Could it be a tuning problem(air/fuel)? Or possibly timing...

_________________
1987 chevy sprint turbo(white)
15 gallon fuel cell in the back hatch, Inline high pressure fuel pump, boost controller.
Air/fuel gauge, boost gauge, oil pressure gauge, water temp gauge.

SOLD, red 1987 chevy sprint turbo


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PostPosted: Sat Jan 16, 2016 1:10 am 
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Joined: Tue Feb 13, 2007 10:28 pm
Posts: 1170
Location: So Cal, USA
*Ballast Resistor not required

Check air filter, fuel filter, make sure replacement the cap/rotor are designated parts, they are
different from the non-turbo and wont work, check cold start injector and wire harness & connector
(the wires just prior to the connector tend to break). Is it cold in Utah right now? Might need
that CSI for the first 5-10 mins warmup.

Check all your basics, and intake hoses, tight clamps, vacuum hoses etc.
Use the wiring diagram on the hood underside and ensure all your vacuum
crap is secure.

Post up a pic(s).


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PostPosted: Wed Jan 20, 2016 4:26 pm 
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Joined: Sat Oct 24, 2015 11:10 pm
Posts: 27
Location: Santaquin utah
I read that a point system distributor needs a ballast resistor, I ran it without itran fine and didn't get hot but I figured I'd better be safe

_________________
1987 chevy sprint turbo(white)
15 gallon fuel cell in the back hatch, Inline high pressure fuel pump, boost controller.
Air/fuel gauge, boost gauge, oil pressure gauge, water temp gauge.

SOLD, red 1987 chevy sprint turbo


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PostPosted: Wed Jan 20, 2016 5:56 pm 
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Joined: Mon Dec 01, 2003 12:47 pm
Posts: 11669
Location: columbus, ohio
it's likely that it's due to the fact that the ignition system on a mk1 turbo3 is an electronic type and not a true points type ignition system.

the mk1 turbo3 uses a big transistor as a pass element to fire the coil and a variable reluctor type sensor to trigger the transistor (igniter.)

the entire ignition is balanced electronically with the circuit design properly biased for current control. the flyback voltage from the coil is controlled by a solid state noise filter and there are no point contacts to burn. :wink:

_________________
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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PostPosted: Thu Jan 21, 2016 12:25 am 
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Joined: Tue Feb 13, 2007 10:28 pm
Posts: 1170
Location: So Cal, USA
Quote:
it's likely that it's due to the fact that the ignition system on a mk1 turbo3 is an electronic type and not a true points type ignition system.

the mk1 turbo3 uses a big transistor as a pass element to fire the coil and a variable reluctor type sensor to trigger the transistor (igniter.)

the entire ignition is balanced electronically with the circuit design properly biased for current control. the flyback voltage from the coil is controlled by a solid state noise filter and there are no point contacts to burn. :wink:


You forgot to include what gauge wire is used in the factory loom, how thick the wire insulation is, how many spade connectors, ring connectors,
and weather pack connectors are used in the wiring, how many strands of copper wire per inch, whether or not mulitplex wiring is used,
and resistance variables vs. ambient air temp. Not to mention how much db of noise is present in the sound system with the volume potentiometer
set at 25% if the wrong type plug wires are used at idle, low speed and cruise speed.

But to summarize, yup no points. =)


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PostPosted: Thu Jan 21, 2016 2:56 pm 
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Joined: Sat Oct 24, 2015 11:10 pm
Posts: 27
Location: Santaquin utah
Well thanks guys! I guess if anyone needs a ballast resistor I have an extra, since it wouldn't be worth returning because I got it cheap off ebay

_________________
1987 chevy sprint turbo(white)
15 gallon fuel cell in the back hatch, Inline high pressure fuel pump, boost controller.
Air/fuel gauge, boost gauge, oil pressure gauge, water temp gauge.

SOLD, red 1987 chevy sprint turbo


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 Profile  
 
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