Underdrive pulley?
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Lead Driver
Joined: Sep 2004
Posts: 7,208
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From: Wichita, KS
Underdrive pulley?
Green is running right at 3000 RPMS at 65 MPH. I'm considering going to an underdrive crank pulley. I think spinning the ac and other stuff that fast is costing me in mpg and no really good for the accessories.
Thoughts?
Thoughts?
Postmaster
Joined: Aug 2003
Posts: 3,705
Likes: 4
From: Wichita KS
Chad said you mentioned something about that, the only thing I would worry about is all the electronics you run might be too much of a load at idle and may not charge well or even damage the battery or alternator. Other than that it might not be a bad idea.
Hotshot
Joined: Mar 2001
Posts: 13,552
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From: Manhattan, KS
As Duane said, and that would also be a concern for keeping the engine cool when rock crawling or idling in traffic with either a belt driven fan or an electric fan kicking in and pulling a lot of amps.
Hotshot
Joined: Mar 2001
Posts: 13,552
Likes: 79
From: Manhattan, KS
I didn't know I was voting, but I guess the answer to that is, yes, since you put it that way. As you would say, if my rememberer is working correctly I think I remember one of our off road friends had some issues with cooling related to underdrives keeping the battery charged while off roading and using electric radiator fans.
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Lead Driver
Joined: Sep 2004
Posts: 7,208
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From: Wichita, KS
I don't have a cooling issue. These days. The radiator is new and twice as big as the one that was in Green with the manuel tranny. And it has a brand new HD cooling mechanical fan. The inverter and GPS really doesn't pull a lot of power.
But AC is where I have trouble. It doesn't charge now at idle with the AC on. The engine runs warmer with the AC on but not the tranny. I have the aux. cooler after the radiator cooler and it is in front of everything in the grill so the tranny auxl. cooler gets the coolest air. And mpg is 2-3 less spinning the AC compressor at 3000 rpms. Dosen't sound like a lot but when you are talking 13 vs. 15 or so it can really hurt your range. And almost a 20% drop.
But AC is where I have trouble. It doesn't charge now at idle with the AC on. The engine runs warmer with the AC on but not the tranny. I have the aux. cooler after the radiator cooler and it is in front of everything in the grill so the tranny auxl. cooler gets the coolest air. And mpg is 2-3 less spinning the AC compressor at 3000 rpms. Dosen't sound like a lot but when you are talking 13 vs. 15 or so it can really hurt your range. And almost a 20% drop.
Postmaster
Joined: Aug 2003
Posts: 3,705
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From: Wichita KS
What about a gear change?? it would help your highway mileage rather than hurting it and with the stubbler you wouldn't lose much on the trial, just a thought
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Lead Driver
Joined: Sep 2004
Posts: 7,208
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From: Wichita, KS
Yup, 3.55's would be another way to go. But the axles have been rebuilt and I really didn't want to go to all that expense and work.
Same with the 4" suspension lift. $700 + and I do have 33's I would just need to change wheels and the spare would not fit underneth. So it would have to go in the back or I'd need a tire carrier on the bumper.
Just thought a c-note for a pulley and a few minutes work + maybe a new drive belt would help out and get me by through the next year.
Same with the 4" suspension lift. $700 + and I do have 33's I would just need to change wheels and the spare would not fit underneth. So it would have to go in the back or I'd need a tire carrier on the bumper.
Just thought a c-note for a pulley and a few minutes work + maybe a new drive belt would help out and get me by through the next year.
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