2# upper pulley ?
#1
10-07-2004 | 10:54 AM
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From: Texas
2# upper pulley ?
i was looking for a 2.8 upper and found someone willing to sell me theirs... but its a 2# upper... i personally have never heard of that...
whats difference in 2# upper and 2.8# upper??
is it more aggressive or less aggresive? is it bigger or smaller than the 2.8, wondering what belt I would need
whats difference in 2# upper and 2.8# upper??
is it more aggressive or less aggresive? is it bigger or smaller than the 2.8, wondering what belt I would need
#2
10-07-2004 | 11:47 AM
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From: Freehold,NJ
I think what he means is that the pulley is adding 2lbs of boost which is about what you see from a 2.80 pulley. The theory is that with the upper each 1/10th of an inch you do down you pick up 1 lb of boost. So if a stock is 2.93 then you put on a 2.80, theoretically you should gain 1.3 lbs of boost. Some trucks vary but thats a good rule of thumb.
Belt depends on lower and idler setup. I would go with 100mm idlers and run a 67" on a 4lb and a 68" on a 6lb.
JimIII@JDM
Belt depends on lower and idler setup. I would go with 100mm idlers and run a 67" on a 4lb and a 68" on a 6lb.
JimIII@JDM
#3
10-07-2004 | 12:13 PM
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From: Texas
#4
10-07-2004 | 01:22 PM
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From: KY
Originally posted by JimIII@jdm
I think what he means is that the pulley is adding 2lbs of boost which is about what you see from a 2.80 pulley. The theory is that with the upper each 1/10th of an inch you do down you pick up 1 lb of boost. So if a stock is 2.93 then you put on a 2.80, theoretically you should gain 1.3 lbs of boost. Some trucks vary but thats a good rule of thumb.
Belt depends on lower and idler setup. I would go with 100mm idlers and run a 67" on a 4lb and a 68" on a 6lb.
JimIII@JDM
I think what he means is that the pulley is adding 2lbs of boost which is about what you see from a 2.80 pulley. The theory is that with the upper each 1/10th of an inch you do down you pick up 1 lb of boost. So if a stock is 2.93 then you put on a 2.80, theoretically you should gain 1.3 lbs of boost. Some trucks vary but thats a good rule of thumb.
Belt depends on lower and idler setup. I would go with 100mm idlers and run a 67" on a 4lb and a 68" on a 6lb.
JimIII@JDM
I have the idler setup and a 2x4 combo w\67" belt just as Jim mentioned. The ldler setup does NOT include the 2.80 upper.
They run around $180-$200 all the vendors seem to have them. They do stop belt slip and look good.
here's a pic:
IMHO I dont think you gain a true 2#'s. It's more like 1 to 1 1\2 at the most. I get 13 - 13 1\2 in 80deg weather and 14-15 in 60 deg. weather.
Last edited by 0light1; 10-07-2004 at 01:24 PM.
#5
10-07-2004 | 01:48 PM
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From: Leander TX
Originally posted by 00Bolt
Jim,
hey bro... i already have a 4lb lower. So you think the 67" gator belt would be best for me?
can you please explain to me the idler bracket thing. Does the kit come with the bracket and pulleys or is that something totally different....
Jim,
hey bro... i already have a 4lb lower. So you think the 67" gator belt would be best for me?
can you please explain to me the idler bracket thing. Does the kit come with the bracket and pulleys or is that something totally different....
and on 67.0" on my '04 L w/3lb (very tight)