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Author
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Topic: convert `87 5.0 to use `93+ high torque mini starter?
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Blind
2.3L
CAFords OG
Member # 3052
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posted
 
 
What does it take to do this?
my starter is on its way out, I have to bang on it with a wrench to get it to crank and if I'm going to replace it I want the newer *better* style
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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two-gun kid2
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Member # 5891
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posted
i thinks its a direct replacement, you just have to use thicker gauge power wire
Posts: 5566 | From: Hayward,Ca | Registered: Jul 2005
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JohnB
Tech Moderator
Member # 969
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posted
Change the cable to a 0 gauge and run a solenoid wire.
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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Blind
2.3L
CAFords OG
Member # 3052
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posted
explain a little more john?
run a 0 guage to the relay on the drivers fender I get
but solenoid wire?
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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JohnB
Tech Moderator
Member # 969
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posted
Yup, 0 gauge to replace your existing wire. A solenoid wire (from the starter itself) to your firewall solenoid, as the 92-95 starters were a 2-wire setup. It needs to be connected to the opposite terminal on your firewall solenoid and plugged into the single-prong on the starter itself. I would use 10 or 12 gauge for that.
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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Blind
2.3L
CAFords OG
Member # 3052
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posted
just to double check I called up a buddy of mine who has a `92 GT to check out his starter wiring.
here's the differences:
his has 4awg starter lead on the same side as the battery lead (large 4awg black wire is to starter on this pic, red is to battery). It also has a 12awg lead from the switched side going to the starter.
This is how my car is right now, so basically what I'm going to do is move the large black 4awg starter lead to the other post on the relay, and add a 12awg wire from the switched post to the new mini starter.
John, whats your reasoning behind needing a 0awg lead to the starter?
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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JohnB
Tech Moderator
Member # 969
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posted
I use 0 or 2 gauge on anything battery/ground related. I've seen too many of the 4 gauge ones sold over the counter literally melt after about the 3rd crank. Just my opinion. ![[Smile]](smile.gif)
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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94gt
¯
Member # 3060
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posted
its always better, imo, to go larger(smaller numerically) when it comes to wiring.. resistance will build with length and heat, so a larger wire is a safer bet ![[patriot]](graemlins/patriot.gif)
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2020 Explorer ST
2011 Silver Raptor 'Screw
Posts: 5777 | From: Beavercreek, OH | Registered: Jul 2003
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Blind
2.3L
CAFords OG
Member # 3052
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posted
I fully understand that, but from the description of the high torque mini starters for sale I see this:
quote:
This starter will fit older 4 in., 4-1/2 in. starters providing a 50% weight reduction and requiring less cranking amps than the older larger starters.
Because the starter is a smaller size, it provides better header clearance and reduces the effects of 'hot start' by staying cooler.
so if they are smaller, more efficient, and require less cranking amps I see no reason to upgrade the existing wiring ![[Confused]](confused.gif)
And the fact of the matter is the starter can't pull any more amps than the battery can supply, so have a 0awg run from the starter relay to the starter but keeping the existing 4awg run from the battery to the starter relay puts that 4awg from the battery to the relay as the bottleneck of the system, its impossible to pull more current than that 4awg run can supply
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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two-gun kid2
¯
Member # 5891
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posted
what is the difference between the left and right post?
Posts: 5566 | From: Hayward,Ca | Registered: Jul 2005
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Blind
2.3L
CAFords OG
Member # 3052
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posted
the left post receives constant 12v. The right post receives 12v while the key is in the crank position, the top small wire is the signal wire from the ignition column.
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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