AMP Draw with Starter
Thread Starter
Joined: Nov 2007
Posts: 312
Likes: 4
From: Surrey, BC, Canada
Car: 1991 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Axle/Gears: 10 bolt, 3.08
AMP Draw with Starter
What kind of Amperage would a starter on a 305 pull when cranking over the motor? Would it exceed 200AMPs?
I want to put in a switched fuse and need to know this to size it. 200AMP is common but might be low on the 305.
I want to put in a switched fuse and need to know this to size it. 200AMP is common but might be low on the 305.
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Joined: Jul 1999
Posts: 17,264
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: AMP Draw with Starter
It may spike to over 250 when it first starts to crank but while constantly cranking it should only draw about 150 to 200 amps.
You can't and have no need to fuse the starter feed wire. You'll probably blow the fuse regularly.
You can't and have no need to fuse the starter feed wire. You'll probably blow the fuse regularly.
Thread Starter
Joined: Nov 2007
Posts: 312
Likes: 4
From: Surrey, BC, Canada
Car: 1991 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Axle/Gears: 10 bolt, 3.08
Re: AMP Draw with Starter
I am going to fuse the battery. It is common practice for large stereo systems but you have to keep in mind the max AMP draw.
Moderator
Joined: Jul 1999
Posts: 17,264
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: AMP Draw with Starter
Fuse the stereo system not the starter. Run a separate power wire off the battery to the fuse then from the fuse to the stereo. If your stereo draws that many amps, you'll need some battery cable to feed it.
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