[Ecotec] Ecotec underdrive pulley kit

[kizza50]

Heard about a under-drive pulley kit that replaces some pulleys and belt and gives u about 15 kw, anyone know or hears anything about it?

 

[Pub247]

Sounds liek BS to me 15 kw is a huge gain by any means

 

[Adamvr93]

i doubt you would gain 15kw... 5kw sounds about right..
i havent seen these for the ecotec but it would definately be a good modification to do if you can find a place that makes them.. especially if you drive at high rpm all the time it will save your alternator and power steering pump etc.. from wearing out from spinning at such high rpm all the time..

 

[Immortality]

no such thing as a under driven harmonic balancer for the ecotec/buick V6 range. you can get some over sized pulleys for the accessories though (alternator, water pump and power steering). i know they claim some big numbers on under driven pulleys for the alloytec's and LS series motors but i don't think you will see that much on a V6

see Clarko's Performance

 

[holden_4aw_lyfe]

immortality;

im getting my pulleys from clarkos performance, do they benefit hp gains in any way? or are the 20% larger just for looks???

 

[Immortality]

they will slow down the speed of the accessories , so yes it will reduce the amount of power they consume. how much exactly is hard to say but i don't think it will be anywhere near 15kw

 

[acarmody]

OP is this a road car or a track car?

I personally would want my power steering, power brakes, air-con, water pump, and alternator spinning at proper speeds when driving.

 

[Immortality]

under driven is fine on a road car, hell on the LS motors you can get balancers that are 25% under driven. vac for the brakes comes from manifold vacuum so no issues there. sometimes at idle the alternator may struggle a little to maintain full voltage but at cruising rpm it should be fine, same with the waterpump, it may heat up just a little faster when idling but once your cruising again it should be fine.

 

[VT-565]

Mass produced (pressed steel/straight vane) water pump impellers are inefficient at high rpm anyway.
Under driving the accessories reduces parasitic drag.
Doesnt 'make' hp, just reduces load on the crank a little.

 

[XR6_661]

Mass produced (pressed steel/straight vane) water pump impellers are inefficient at high rpm anyway.
Under driving the accessories reduces parasitic drag.
Doesnt 'make' hp, just reduces load on the crank a little.

Makes them rev a bit more freely if I understand correctly?