Lightweight pulleys...?

Most modern vehicles are underdriven from the factory so you don't see these for newer vehicles anymore. Used to free up 10+ hp on 5.0 Mustangs.

 

Where you getting that stat from. They are not under driven as they have to meet DOT and smog regs. So most of the parts are NOT under driven.

Hence people offering under drive components.

 

IIRC somebody posted up here with some red pullies recently on a taco. Can't remember the brand. Had to have been on a 6 cyl. Pretty sure it was 2nd gen too. Here it is...NONSTOPTUNING was the brand...here's the thread

http://www.tacomaworld.com/forum/product-reviews/17144-nst-lite-weight-crank-pulley.html

but their website only lists yaris, scion, corollas, etc....???

 

Someone on here sells NST lightweight crank pulleys for 4.0 2nd gens. 140 bucks shipped. I'd rather get a lightwieght crank pulley without having to sacrifice the speed of how fast my other pulleys are turning. It just creates problems. Buts that's just my .02

 

NTS is still not under driving the pullies. All they did was lighten the crank and one other. Crank is never a good idea to mess with as the pull is balanced for the entire rev range. Lightening it will reduce parasitic drag but there still could be a risk of harmonic balancing.

There is NO under drive pullies for the current gen of Tacoma’s that I have been able to find. Only light weight ones.

 

Manufacturers used to overspin the accessories at idle as a safety net but they push closer to the edge these days to cut down on fuel consumption.

 

I have UDP on crank & all others except AC are lightened on my car. No issues with balance throughout rpm range, no AC cooling issues, no overheating issues because of wp turning slower & no pwr issues from alt turning slower, idling or driving. Must be certain vehicles and/or certain motors.