underdrive
08-27-2007, 09:06 PM
#1
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underdrive Hey guys I have a question about underdrive pulleys through all of my searches i've come to the conclusion that after the install your only charging the battery @ 950 rpm what about if my idle is lower than 950 in gear will it not charge unless im above 950RPM.. is this acurate?
08-27-2007, 09:14 PM
#2
With the cam driven WP UD pullies have relatively little to offer in power to the wheels. If you are reving vwery high or are road racing are the only ways I would consider them and in either of those cases an underdrive quality damper like the ATI would be a MUCH better solution.
So do yourself a favor and pick a worthwhile mod.
So do yourself a favor and pick a worthwhile mod.
08-27-2007, 09:32 PM
#3
To answer the question that was asked:
Yes, the alternator will not keep up. If you use an underdrive pulley on the crank, you should run an overdrive pulley on the alternator.
I run an underdrive pulley. I was sitting in line at the strip while they cleaned up a broken car. My battery died. I then installed the overdrive pulley on the alternator, and have not had an issue since.
The underdrive pulley will move everything else slower, your power steering and a/c for example.
Are the gains worth the expense? That is your call.
Yes, the alternator will not keep up. If you use an underdrive pulley on the crank, you should run an overdrive pulley on the alternator.
I run an underdrive pulley. I was sitting in line at the strip while they cleaned up a broken car. My battery died. I then installed the overdrive pulley on the alternator, and have not had an issue since.
The underdrive pulley will move everything else slower, your power steering and a/c for example.
Are the gains worth the expense? That is your call.
08-28-2007, 03:16 AM
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yeah i think ill just wait I guess I wont be getting this I don't really rev my car that high to matter Ill just wait for a good deal on some headers and y pipe and the 1.6ers ( and springs)
08-28-2007, 08:37 AM
#7
zone, settle down.
This is what I call free horsepower. The car is not any louder, it does not idle any differently, and it is always there. The only down side is that it takes a little more oomph to turn in a parking lot.
Is it worth it? That is always up to you.
And zone, if the car is to be given away, let him give it to me. I still have a couple of spaces in my driveway.
This is what I call free horsepower. The car is not any louder, it does not idle any differently, and it is always there. The only down side is that it takes a little more oomph to turn in a parking lot.
Is it worth it? That is always up to you.
And zone, if the car is to be given away, let him give it to me. I still have a couple of spaces in my driveway.
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08-28-2007, 04:06 PM
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wtf
Originally Posted by ZONES89RS
MAKE UP YOUR ******* MIND *******!!! You allways do that, i swear, your like a woman, cant make up your mind. ******* give the car to me and ill handle it, ride your bike!
08-29-2007, 02:42 PM
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Spend ur money on something else. It's only worth a few HP, and if u wanting better track times, it don't take long to just remove the belt for a pass or two and then throw it back on.
08-29-2007, 04:14 PM
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Originally Posted by koolaid_kid
To answer the question that was asked:
Yes, the alternator will not keep up. If you use an underdrive pulley on the crank, you should run an overdrive pulley on the alternator.
I run an underdrive pulley. I was sitting in line at the strip while they cleaned up a broken car. My battery died. I then installed the overdrive pulley on the alternator, and have not had an issue since.
The underdrive pulley will move everything else slower, your power steering and a/c for example.
Are the gains worth the expense? That is your call.
Yes, the alternator will not keep up. If you use an underdrive pulley on the crank, you should run an overdrive pulley on the alternator.
I run an underdrive pulley. I was sitting in line at the strip while they cleaned up a broken car. My battery died. I then installed the overdrive pulley on the alternator, and have not had an issue since.
The underdrive pulley will move everything else slower, your power steering and a/c for example.
Are the gains worth the expense? That is your call.
I have a underdrive pully on the crank and my battery dies quickly(new battery)
08-31-2007, 08:13 PM
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No passes for me
Originally Posted by Scrapin'4.8
Spend ur money on something else. It's only worth a few HP, and if u wanting better track times, it don't take long to just remove the belt for a pass or two and then throw it back on.
09-01-2007, 08:14 AM
#20
Originally Posted by ZONES89RS
Just do all the bolt ons, every bit counts, the more power you make the more you will see out of it.
Think things through and spend money where it counts, ask how and why and try and understand the processes involved, that is what can make you fast especially with a limited budget like most of us have.
Look at my car, stock balancer, stock wp, stock timing chain, these things are not replaced because the WORK. The kids on these boards will have you buying crap just because someone sells it without putting any real thought into the hows and whys.
I will say that at some point I will have a nice ATI underdrive damper, but the real goal there will be the nice ATI damper, the UD will just be an afterthought. I might pickup an electric WP to slap on in fall for a little extra nudge in the good weather, I will not DD one though due to the failure mode of them.
Another thing to consider is most of these guys are not bright enough to understand a cammed car may not need a OD alternator pulley where a stock car probably would benifit from one. There is the source of conflicting info on that.