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under drivers??? 

 

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 Post subject: Re: under drivers???
Posted: Fri Nov 26, 2010 1:40 pm 
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found a few of the cheaper ones someone mentioned but you'll notice they only contain the harmonic balancer and belt, the other link contained the 2 pulleys for alt and water pump :)

http://cgi.ebay.com.au/UNDERDRIVE-KIT-F ... 53e38fd134

http://cgi.ebay.com.au/BA-Falcon-6-Cyl- ... 2c58d8a416

 

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 Post subject: Re: under drivers???
Posted: Fri Nov 26, 2010 3:34 pm 
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i wonder if you get less increase fitting the balancer and the two pulleys on, compared to just the balancer. cause it might be worthwhile just buying the balancer and then getting the high flow thermostat

 

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 Post subject: Re: under drivers???
Posted: Fri Nov 26, 2010 3:52 pm 
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Yeah maybe - not sure aye, i thought the extra pulleys were still to make it better and also causing you to not need to change thermo stat - perhaps someone can confirm?

 

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 Post subject: Re: under drivers???
Posted: Fri Dec 03, 2010 3:11 pm 
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hey can you guys see any difference in these kits besides the price - just the difference is alot but it all seems to be the same (harmonic balancer, 2 puleys and a belt)

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... K:MEWAX:IT

http://cgi.ebay.com.au/ws/eBayISAPI.dll ... K:MEWAX:IT

Cheers
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 Post subject: Re: under drivers???
Posted: Mon Dec 06, 2010 9:32 am 
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If the water pump and alternator are already over-driven, wouldn't it be better to leave the stock pulleys on them, so they run a bit slower and suck less power? Otherwise, you're only reducing the losses from the power steering and air con, which I imagine would be minimal - at least in a straight line :twisted:

On the subject, I have heard of racers converting to electic power steering, using the unit out of the Toyota MR2. Has anyone on here seen this? And is there benefit in doing it on a daily driver? Any downsides?

Thanks.

 

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 Post subject: Re: under drivers???
Posted: Mon Dec 06, 2010 11:24 am 
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electronic power steering pump??, ive never heard of that, ive heard of electronic waterpump, it would be nice to run both water and power steering pumps with electricity, but however you would need either a 2nd battery or a larger alternator to supply power.
i think best way to do it is single harmonic ballancer and then a 91 temp and high flow thermostat.

 

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 Post subject: Re: under drivers???
Posted: Mon Dec 06, 2010 11:34 am 
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I have actually asked the guy who sells the kit on this theory so will let you know what his thoughts are on not using the extra 2 pulleys

 

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 Post subject: Re: under drivers???
Posted: Mon Dec 06, 2010 11:57 am 
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ok spoke to the guy, he said the 2 extra pulleys are exactly the same size as the stock ones, the reason for replacing them is you may as well make the most of the opportunity when changing the belt, especially because they are a wear and tear item. I guess you could be cheap and buy just the harmonic balancer to save money but i personally would rather do the whole lot while the opportunity is there.


EDIT - The guy has actually offered a group buy on this kit (http://cgi.ebay.com.au/ws/eBayISAPI.dll ... K:MEWAX:IT) so not sure who is interested or how we would organise this but he said to let him know some numbers and then he will be able to give a price. Is there a place in the forums where we can alert people to group buys?

Cheers

Phil

 

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 Post subject: Re: under drivers???
Posted: Mon Dec 06, 2010 4:13 pm 
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phil545 wrote:
ok spoke to the guy, he said the 2 extra pulleys are exactly the same size as the stock ones, the reason for replacing them is you may as well make the most of the opportunity when changing the belt, especially because they are a wear and tear item. I guess you could be cheap and buy just the harmonic balancer to save money but i personally would rather do the whole lot while the opportunity is there.


EDIT - The guy has actually offered a group buy on this kit (http://cgi.ebay.com.au/ws/eBayISAPI.dll ... K:MEWAX:IT) so not sure who is interested or how we would organise this but he said to let him know some numbers and then he will be able to give a price. Is there a place in the forums where we can alert people to group buys?

Cheers

Phil


Take a look at the sticky under the for sale section for the group buy info and you can't post one up till you have the right permission to do it.
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 Post subject: Re: under drivers???
Posted: Mon Dec 06, 2010 4:16 pm 
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thanks mate but meh, too much hard work :P plus i have been burned in the past

 

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 Post subject: Re: under drivers???
Posted: Mon Dec 06, 2010 4:21 pm 
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those 2 extra pulleys are the tensioner and idler pulleys, so nothing to do with underdriving any of the accessories, but yeah it's not a bad idea to change them when you change the belt.
the bearings start to get real noisy.
they are real easy to change once the belt is off too.

 

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 Post subject: Re: under drivers???
Posted: Mon Dec 06, 2010 10:14 pm 
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hmm okey that solves a big question, its probably still a good idea to change the thermostat to a high flow one

 

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 Post subject: Re: under drivers???
Posted: Thu Dec 09, 2010 10:39 pm 
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Repco have a trade special on BA underdrive kits right now, if you go and ask for a good price you might just get lucky

 

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 Post subject: Re: under drivers???
Posted: Thu Dec 09, 2010 11:33 pm 
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hmm ill check it out tomorrow

 

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Performance mods: typhoon + territory pipe with K&N filter, full exhaust, BPR generic tune, lowered, xr6t front brakes, territory rear brakes
Visual mods: 19" rim, lower grill mesh, oil pressure and vacuum gauges, engine bay lighting, foot well lights
some of my main mods

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 Post subject: Re: under drivers???
Posted: Fri Dec 10, 2010 4:46 pm 
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i had a look at repco its $150 for the harmonic balancer (just the one pulley, no belts). the part number is HB:1157-N according to the powerbond catalouge on the link someone posted on page 1, this part is a replacement part, and as far as i can read/tell this offers no performance increase at all, its simply just like a generic part

 

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Performance mods: typhoon + territory pipe with K&N filter, full exhaust, BPR generic tune, lowered, xr6t front brakes, territory rear brakes
Visual mods: 19" rim, lower grill mesh, oil pressure and vacuum gauges, engine bay lighting, foot well lights
some of my main mods

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