zetec alloy crank pulley - 7 -9bhp gain - true or false?
#1
15000
Thread Starter
Join Date: Mar 2010
Location: evesham , worcs , uk
Posts: 36
Likes: 0
Received 0 Likes
on
0 Posts
zetec alloy crank pulley - 7 -9bhp gain - true or false?
whats your view - there on ebay and i think they are a smaller diameter than std. - but what about the 7 -9bhp gain claim?
#2
I've found that life I needed.. It's HERE!!
iTrader: (1)
Your accesories create drag on the engine as speed increases etc, the light weight ones reduce this drag on the engine so theoretically i dont see why they would not work. I have CFM crank and water pump pulleys on mine. Make sure you get a new water pump pully that is larger otherwise you will underdrive your waterpump with just a smaller crank pully which is not good. There are 2 down sides, your lights may dim when the car is idleing and the lightweight crank pully removes the dynamic harmanisor that is on the standard pully, this is a rubber bush which allows a bit of flex in the crank, without this some say it can put the oil pump at risk as the flex can shatter the oil pump gears
#5
PassionFord Regular
Join Date: Oct 2006
Location: About that area....
Posts: 462
Likes: 0
Received 0 Likes
on
0 Posts
The big balancer pulley is there for a reason , it take removes vibration from the rotating mass of the crank this is what kills oil pump gears and it doesnt matter if you put steel gears in there eaither it will do the same.
#6
Too many posts.. I need a life!!
Join Date: Jun 2009
Location: Here and there ...
Posts: 656
Likes: 0
Received 0 Likes
on
0 Posts
Incorrect. If they pulleys are a smaller diameter as the original poster states he suspects, then (also as mentioned) they will under drive ancillaries thus freeing up more power at the flywheel.
Trending Topics
#8
Did u go for the underdrive pulleys (crank and water pump pulleys). Iv seen CFM do a 2 piece set (link below)
http://focus.c-f-m.com/cfm2pcaluminu...csvtst170.aspx
Wot do people think? Any gud? Iv got full exhaust/induction/cams and pulleys on my 1.8 mk1 focus and just wanted make sure i got it all sorted before i get her mapped!
Thanks
Thread
Thread Starter
Forum
Replies
Last Post