For any of you electronics guru's I relocated my battery to the trunk, I want to put an inline fuse on the power line. I tired a 80 amp and I think a 120amp everytime I would start the car it would pop from the starter trying to get to much power. What size fuse do I need in order to get the car to start?

 

Find out what the current draw (amperage requirement) of the starter is. I haven't seen that spec listed anywhere, but am confident that's the answer you're seeking.

 

yeah.

Probably a lots.

Like 250 or greater.

Might end up > ANL.

 

Yeah I have no idea of the draw I was hoping someone here did. I mean is there any sense fusing it at that point? Im mainly trying to connect the battery + wire to the cars original set of wires. So Im using a fuse holder being I cant find a distribution box that is 2 gauge into 2 gauge etc

 

If it's running through the whole car, it definitely should be fused.

Pinched + wire = fires.

And FIRE BAAAAD

 

A little fire never hurt!!!. So does anyone know the draw from the starter.

 

Battery -> alt, slap in a 150, shouldn't have issues....of course, that's thinking very highly of our alts, but yeah...you're fusing to protect the wire, and 150 = ok

 

Ill try some 150's and see

 

Draw from the alt? That's not what you need to know! The alt produces power to charge the battery. Using a 100amp fuse will be more than adequate after the car is running, but as you've already found from trying 120amp, it's inadequate for STARTING. That's the only reason you keep blowing fuses, because the starter is drawing more amps from the battery, than the fuse is rated for. It's also likely a LOT more, as fuses generally handle quite a bit more than rated current (depending on fuse type) for very short periods. Think about amperage ratings for batteries (such as "400 cold cranking amps"), then consider that the starter uses a small diameter gear to turn the engine using just 12v. When using 12v, you need a lot of amperage to generate power. My guess is that the starter is drawing well over 200 amps. You could either go to a shop and have them measure the current draw during starting, or address the issue in another way. It'd be possible to rig a system using a relay and solenoid close to the battery, such that the battery is only connected to the starter when the key is in the 'start' position. This implies that at all other times the starter will be disconnected (near the battery), such that if the power cable to the starter is pinched it won't be active.

 

Argg Read my first post I meant starter...

 

Damn...even I got off track there.

Yeah, you'll probably want something like this:

http://www.tsunamionline.com/product.php?id=731

But only 1 output so you could get 2 fuses on the one wire. You aren't going to find a big enough ANL for a starter...

 

I use to run 200 on my blazer...

 

im gonna go ahead and reopen this thread, is there any fuse that can handle the draw from the starter??

im doing a battery relocation as well, and would really like to have it fused...

 

They makes fuses in a wide variety of current ratings, so first you need to know how many amps the starter will pull. Most cars starters pull between 200 and 400 amps, so you can search vendors to see what they have in that range.

HTH.