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az79k5 · 01-02-2021, 11:56 AM

I ran the 144 alternator with pretty good success. I put in the Derale 16928 fans and they pull a LOT of power. I upgraded to a 170a single wire alternator from Summit. You can still use the CS plug for the dash light, but it no longer needs an exciter wire (load) to charge.

https://www.summitracing.com/parts/PWM-7864

I also increased the charge and ground wires. They are slightly larger than the starter cable. I don’t remember the exact size.

At idle, the alternator wasn’t charging which can be a problem at long low RPM obstacles. I did some calculations with the charging RPM graphs and got a smaller puller (not by much) to have the alternator spin a little faster than stock. You HAVE to be aware of your top engine RPM and make sure the alternator spin speed does not reach its limit at the engines red line limit.

My engine may hit 3500 OR 4000 RPM rarely, but that will spin the alternator at a max 8000 RPM, which is below the alternator’s red line.

01-02-2021, 11:56 AM	#32
az79k5 Registered User Join Date: Jun 2014 Location: Arizona Posts: 1	Re: CS-144 140amp alternator upgrade howto I ran the 144 alternator with pretty good success. I put in the Derale 16928 fans and they pull a LOT of power. I upgraded to a 170a single wire alternator from Summit. You can still use the CS plug for the dash light, but it no longer needs an exciter wire (load) to charge. https://www.summitracing.com/parts/PWM-7864 I also increased the charge and ground wires. They are slightly larger than the starter cable. I don’t remember the exact size. At idle, the alternator wasn’t charging which can be a problem at long low RPM obstacles. I did some calculations with the charging RPM graphs and got a smaller puller (not by much) to have the alternator spin a little faster than stock. You HAVE to be aware of your top engine RPM and make sure the alternator spin speed does not reach its limit at the engines red line limit. My engine may hit 3500 OR 4000 RPM rarely, but that will spin the alternator at a max 8000 RPM, which is below the alternator’s red line.