Underdrive Pulleys

[JPYBNE]

OK so if this group buy is no longer avalaible from XR, can anyone recommend which underdrive pulley brands are prefered and what sort of $ they are ?

Thanks

James

XR6 NA - needs all the help it can get.

[Vebbers]

The Powerbond 20% billet steel underdrives are they way to go mate, as far as I know.

These are available on ebay for roughly 260-280.

Lemme know how you go with buying/installing one.

Cheers

[Lak]

Hey Vebbers and deano_barra,

I have been thinking of grabbing one of these over the next few weeks and was wondering about approx install costs?

[typhoon_freak]

these work alrite on the T's? im thinkin of getting one.. how come most ppl dont get them if I can get 10rwkw out of them for $250.. not bad I think.

[Vebbers]

Hey Vebbers and deano_barra,

I have been thinking of grabbing one of these over the next few weeks and was wondering about approx install costs?

Ive only been to 1 guy so far for a quote and he said 'around 200'. which I think is a tad expensive, something like this shouldnt cost more than $100-$120 to install, but im just taking an educated guess...

[Panda Eyes]

so im in the low 300rwks now, and am looking for a bit more. had all the usual stuff done, made 314rwkw. since then had a twin 2.5 zorst put on. cat is big. just about to have a dump installed and retuned to suit.

is there any real benefit to putting on an underdrive pulley? $300 or so for 10rwkw is not bad- anyone else found it to be worthwhile?

[turtl3tim]

hate to burst your bubble gt-p but u can buy the 20% under drive pulley kits on ebay for $250 with a belt http://cgi.ebay.com.au/20-UNDERDRIVE-XR6-T...93%3A1|294%3A50 ,for those that didnt quiet understand then concept, its a smaller/lighter pulley that replaces the standard one on the crank, its just one pulley, the ac/alt/water pump pulleys all stay the same, it reduces the resistance on the crank from the accessories with the smaller drive hence the power gain, and it wont affect your cooling enough to make a difference antisocial/ownaxr6t. and whether its a small 2L or a hi-torque 4L its a cheap way to gain <10Kw cobra, it will just be less noticeable on the turbs because it already has a lot more power than a 2L honda/nissan or the standard 4L N/A turbotom/ms700

Sorry 4 chucking names in there, just answering certain queries, not trying 2 make ne1 look like an idiot by singling them out

[Lak]

ebay has them going for $250 at dieselandperformance. talk with onlineperformance as well, they match up the price. afaik these take a couple of hours to install. im grabbing mine tomorrow morning, installing it in the arvo, will let yas know how it goes! :D

[mattyb]

Can someone please explein what underdrives are, how they work and issues problems with having a car run underdrives???

Cheers

[ZAP]

An Underdrive pulley refers to an aftermarket crankshaft or accessory pulley (such as an alternator pulley) that is designed to drive a vehicle's accessories at a slower rate than stock. Underdrive in general means the input rate of rotation in a system is greater than the output rate of rotation. However, an underdrive pulley is considered to be an accessory pulley that is larger than the stock pulley or a crankshaft pulley that is smaller than the stock crankshaft pulley, even though the accessory may not necessarily be underdriven with respect to the crankshaft pulley.

The change in pully size results in less power needed to drive the accessories and more to drive the car. They only will result in very small gains and are generally only used on NA cars to gain any HP they can.