YotaTech Forums - View Single Post - High Output Alternators

LUV24BY · 06-13-2007, 12:43 PM

Anyone running a 100, 120 or 140 Amp alternator? If so, did you have to run any heavier gauge wire (10 gauge) off the alternator's post in order for the electrical system in your Toyota to handle and utilize the higher amps? The guy I bought the alternator off of said he had to use 10 Gauge wire to get the full 140 Amps. How much validity is in that statement?

I just put in a 140 Amp alternator I bought used from a guy (said the alternator was only 1 year old) and the brushes look great, however the VOLT gauge on my SR5 cluster shows the volts just above the line on the middle of the gauge.

I took a meter and tested the post on the alternator (read 12.33 Volts) and the battery (showed 12.42 volts), so I know the battery is getting a charge from the alternator.

Is there any tech sheets out there oon the web or that you may have that addresses upgrading the alternator?

I do know one thig for sure, since upgrading the steering to IFS bax, it's a ROYAL PITA to get the alternator out of the truck. I have factory Power Steering, so that kept it from coming out topside. I ended up having to unbolt the radiator and moving it over to make room to squeeze the alternator out!

TIA!

John

06-13-2007, 12:43 PM	#1 (permalink)
LUV24BY Registered User Join Date: Jan 2007 Location: Phoenix, AZ Posts: 444	High Output Alternators - Question About wiring Anyone running a 100, 120 or 140 Amp alternator? If so, did you have to run any heavier gauge wire (10 gauge) off the alternator's post in order for the electrical system in your Toyota to handle and utilize the higher amps? The guy I bought the alternator off of said he had to use 10 Gauge wire to get the full 140 Amps. How much validity is in that statement? I just put in a 140 Amp alternator I bought used from a guy (said the alternator was only 1 year old) and the brushes look great, however the VOLT gauge on my SR5 cluster shows the volts just above the line on the middle of the gauge. I took a meter and tested the post on the alternator (read 12.33 Volts) and the battery (showed 12.42 volts), so I know the battery is getting a charge from the alternator. Is there any tech sheets out there oon the web or that you may have that addresses upgrading the alternator? I do know one thig for sure, since upgrading the steering to IFS bax, it's a ROYAL PITA to get the alternator out of the truck. I have factory Power Steering, so that kept it from coming out topside. I ended up having to unbolt the radiator and moving it over to make room to squeeze the alternator out! TIA! John __________________ My Junk: 1985 Toyota 4 Runner DLX, 22RE, 5 SPD Mods: 4" TG 47" Front Springs w/ 5" Shackles, 3.5" Super Lift Rear Springs w/ 6" Shackles, TG Cross Over, TG Shock Hoops, 15x8 "Outlaw I" rims, 33x12.50 R15 BFG MT KM's, Doestch Tech 12" DT3000 shocks (4 corners), Custom Front Driveshaft w/ 12" Slip yoke & CV joint ground for higher angle, Toyota Fiberglass front fenders, Centerforce Dual Friction Clutch, SR5 Cluster My World: My 1985 4Runner's Profile My Car Domain Page. Last edited by LUV24BY; 06-13-2007 at 01:02 PM.