Dual alt pulley?

Started by B.Martin, October 19, 2011, 08:49:05 PM

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B.Martin

Do you not need 2 pulleys for this or is it just the one? I only got one is that right or should I have 2?

Grant Monkhouse

Do you have 2 alternators? I always thought the dual
Pulley was off the eshaft?

monterx7

i added a dual alt pulley when i got rid of my air pump...if you take off the air pump belt, then there is very little belt-to-pulley contact on the water pump pulley, so thats why i doubled up.  
 
so now i have 2 belts with little belt-to-pulley contact haha
88 gxlt US spec
86 egi UK spec

Grant Monkhouse

Shouldn\'t you use an under drive kit then?

m1tch

Quote from: Grant Monkhouse;795366Shouldn\'t you use an under drive kit then?

The issue is that the single belt will slip between the alt, water pump and main pulley if there is only 1 belt. I have fitted a dual alt pulley as my mechanical air pump has gone, gives more contact meaning that the water pump is correctly driven. You don\'t want to fit an underdrive kit as that would reduce the flow, they are ok if the car is for track only.

The other options are fitting an idler pulley or a shiny Gilmer kit

L18M

its just one block with 2 groves that fits a belt into each one.

2 doritos on a stick woohoo :rollin

B.Martin

Oh that\'s okay then, cheers Liam. Oh by the way I finally got the leads today, great stuff! Just need the air pump removal blanky things and the belts now and I can get that done, oh Liam... I need an induction kit :Giggle

Prof

Yep - the location of the water pump pulley means that with a single alternator belt, there is only a small contact area (about 2" of circumference on the water pulley, and at a slight angle).  Normally that pulley is also driven by another belt going around the air pump and has about another 3" of contact.
"Plus this engine is probably one of the most volumetric engines going! It passes more air than a herd of cows eating vindaloo\'s" - courtesy of AtomicRex


B.Martin

Oh well thats fine then, if anyone is kind enough to live near a halfords and fancy picking me the belts i need up and shipping them to me i\'d be more than happy to pay the costs plus and extra €10 in beer tokens for your trouble. As frankly Cyprus is a poor attempt of a country when i comes to car bits!

L18M

re-a filter? lol

i can pop to halfords for u for when i post out coilovers to you lol

blanking plates.. (doesnt say if tis fd or fc though.)
http://www.racingbeateurope.com/b-blanking-plate-kitb-741-p.asp
2 doritos on a stick woohoo :rollin

grinder

what belts are you putting on ??

i need to know if i ever use the dual alt pulley i bought 6 yrs ago :D

Im sure you can use some old mini belts ?


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B.Martin

#11
Quote from: L18M;795425re-a filter? lol

i can pop to halfords for u for when i post out coilovers to you lol

blanking plates.. (doesnt say if tis fd or fc though.)
http://www.racingbeateurope.com/b-blanking-plate-kitb-741-p.asp

Re-A filter is rather pricey is it not? Good one with the coilovers ;)

Re- the racing beat blanks, its for the FD.

Quote from: grinder;795428what belts are you putting on ??

i need to know if i ever use the dual alt pulley i bought 6 yrs ago :D

Im sure you can use some old mini belts ?

I heard this too, i\'m sure someone can clarify.

L18M

just use a normal fc alt belt.
i thought the mini belt was for the \'yoohoo\' belt?
im just using normal alt belt, so have 2 of them on the engine :)
2 doritos on a stick woohoo :rollin

grinder

cool

anyone got a halfrauds part number ?


1990 Black Turbo II ( Updated 24th October 2006 ) : Click Here !!
1991 Turbo II Cab ( Updated 21th May 2009 ) : Click Here !!
Piccies >>> July 2004 / August 2005
My Feedback Thread: Click Here !!
Official Mazda Rotary club Tight A$$ :King (So tight only dogs hear him fart)
MRC Bargain Hunter 2005/6/7/8/9/10/11/12/13/14 :god
Inventor of the 96p car cover:D
**Special award for services to tightness**
Lifetime achievement award for services to tightness
The tightest man on earth
:Giggle

Prof

Well the belts are AVX10 x 800La (Gates 6212MC) - so HB800a should be about right me thinks ?
"Plus this engine is probably one of the most volumetric engines going! It passes more air than a herd of cows eating vindaloo\'s" - courtesy of AtomicRex