I'd assume the truck should have a 130A on it, but mine's from an era that had a 65A (yet many came with a 90A I believe in the later years) but now has a 200A.

Normal output doesn't describe how it'll output, it may have just enough voltage but not amperage. A 1-3/4" alt pulley would give 100% charge (amps/volts) at around 700rpm, with the setup you're describing.

If you're beating on the alt with the e-fans and a large amp, consider it for more output at idle... it's not as if it's $160.

 

True...I'll look into it...have a link or brand name?

 

You don't need a certain brand, ASP makes them but you're paying for their name. A few places sell them even less as a no name brand.

These guys are inexpensive also - http://www.alternatorparts.com/pulley_size.htm

Just as my point of reference, I had a three piece pulley setup on my truck then installed LS1 e-fans... the 130A alt I was running then couldn't keep up at idle, as I only had a 2.25" pulley. So I yanked the pulleys and kept the fans.

 

Yep, what I was saying that you can't remove the fan shroud without removing the fan and vice versa. Not enough room

 

I also have the 3 pully set and took them off. Hot summer with a/c running always, lights at night and radio. I did split the fans to avoid lots of wear and tear on 1 fan. used 1 fan for low temp and the high temp fan with a/c to even up the use since A/C and low temp were the most likely trigger for fan use. This was done contrary to Troyer instructions! Which was making both fans run often=lots of amps to run all the stuff. Got tired of having to jump start the truck after 2 times and not knowing if it would start every morning. Did have lots of problems with belt squeal running the smaller Alt pully. Just got tired of messing with it.

Some advise: put the low temp and a/c on 1 fan. Set that fan temp turn on to at least 195 so it does not run while driving down the road, when a/c is turned on it will run that fan anyway but not both. The amount of power gained by the unders was minimal=not worth the hassle or the cost of a new Alt.

Randy

 

I ran my TP 2 pulley set and fans all last week before getting my custom tune which brought up my idle to 850, with no issues at all. Couldn't even tell the lesser output. I think it's the 3 pulley set that screwed ya. I also like the way TP has the fans setup because the primary fan only runs at a stop when it hits 202 degrees and I rarely run the AC. When / if I do...I'd like that second fan, the one that hardly ever runs, to take up some of the slack and give the primary a rest. If the AC is on and that second fan is running, it won't be long, even while sitting, before the primary can kick off. Just my opinion anyway.

Only thing that sucks, I tested the fans with a 9v before installing to make sure they were rotating in the right direction, but I was looking at them from the wrong side so when I got the install DONE, I noticed they were pushing rather than pulling so I had to clip the wires 6" from the motors and reverse them. This was way easier than re-doing all that loomed wiring, but it put another splice / butt connector on the power / grounds. I didn't like that idea so much, but I'm sure it's alright like that.