Alternator Question?

[Anonymous]

I want to be able to shut my alternator off when I race to get every last HP I can out of my motor

I know there is a wire you put a on/off switch in but I forgot which wire coming off the alternator it was.....Maybe the field wire?

This has been talked about before but I dont have the time this morning to look it up

Thnaks,

Doug

 

[addo]

I believe it is the field wire you disconnect.

Are you also running a race battery (something small/light that will take repeated cycling)?

 

[XFlow_Fairlane]

and is it a 16V battery? don't forget your voltage will drop from about 14 to 12-11 without an alternator. This can be an issue with spark.

 

[LaGrasta]

If you really want to make the most of it, rebelt it for races bypassing the alt altogether.

 

[MustangSix]

Problem is, most electronic ignition systems function best at 13.5-15 volts. The battery will only give you 12V. You may be losing some efficiency there in order to gain a couple of horses from the alternator.

 

[Lazy JW]

If you really want to make the most of it, rebelt it for races bypassing the alt altogether.

Yup. And wire up a DeWalt® 18v battery from your cordless drill for a temporary ignition source. It would work plenty long enough for a day of drag racing. Remove the car battery to save weight.
Joe

 

[Anonymous]

Dang....forgot about the voltage drop, the DUI distro probably wouldnt like that to much...

Plan B is a underdrive pulley for the alternator. I'm running the dual belt later model waterpump that has the smaller water pump pulley.

I have the early larger single belt water pump pulley and a new early water pump in the shop.

Anyone running a early model water pump with a single belt with Mikes 2 belt performance balancer? Curious if the dual belt harmonic balancer will line up with the single belt water pump & alternator pulley without tearing it all apart and trying it out myself?

Thanks,

Doug

 

[Bort62]

Problem is, most electronic ignition systems function best at 13.5-15 volts. The battery will only give you 12V. You may be losing some efficiency there in order to gain a couple of horses from the alternator.

GM HEI will work reliably down to about 9v.

You should have no problem running off the stock battery for a pass down the strip.

You can drive for literally hours on battery alone. I think I drove my Ranchero for the first week with no Alt and my exide bluetop deep cycle.