Stillen Drive Crank Pulley - 5 to 12 HP
11-23-2002, 07:33 AM
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Stillen Drive Crank Pulley - 5 to 12 HP
Check out this link ....
they claim that they got 37 BHP on the 300Z with the replacement
Stillen Drive Pulley
does anyone know how much effort it would take to install this?
Rod
they claim that they got 37 BHP on the 300Z with the replacement
Stillen Drive Pulley
does anyone know how much effort it would take to install this?
Rod
11-23-2002, 07:51 AM
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I don't know, this direct quote from their site seems pretty clear to me.
An average of 5 to 12 HP and 4 to 8 lbs.-ft. on normally aspirated engines and 8 to 16 HP and 8 to 18 lbs.-ft. on forced induction engines. Higher gains are possible. For example, a Nissan 300ZX twin-turbo saw gains as high as 37 HP and 45 lbs.-ft. on the dyno just by replacing the stock crank pulley with the Ultra S lighted underdrive crank pulley.
An average of 5 to 12 HP and 4 to 8 lbs.-ft. on normally aspirated engines and 8 to 16 HP and 8 to 18 lbs.-ft. on forced induction engines. Higher gains are possible. For example, a Nissan 300ZX twin-turbo saw gains as high as 37 HP and 45 lbs.-ft. on the dyno just by replacing the stock crank pulley with the Ultra S lighted underdrive crank pulley.
11-23-2002, 07:59 AM
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Our shop just did a big buyin with Unorthodox Racing. I'm really impressed with the results they are getting. They are working on the 350Z products as we speak. They are expecting to squeeze at least 15rwhp out of a pulley set. Hopefully they will suceed. One really cool thing that they do is offer a rebate for dyno charts. If you dyno your car before and after the installation of their product, they will send you a rebate check for 30 bucks.
11-23-2002, 09:12 AM
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Originally posted by Monkey Man
They are working on the 350Z products as we speak. They are expecting to squeeze at least 15rwhp out of a pulley set. Hopefully they will suceed.
They are working on the 350Z products as we speak. They are expecting to squeeze at least 15rwhp out of a pulley set. Hopefully they will suceed.
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11-23-2002, 12:50 PM
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Originally posted by Subw00er
Ok, so what is the bad part? Every mod has some sort of tradeofff
Ok, so what is the bad part? Every mod has some sort of tradeofff
11-23-2002, 12:59 PM
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Originally posted by Subw00er
Ok, so what is the bad part? Every mod has some sort of tradeofff
Ok, so what is the bad part? Every mod has some sort of tradeofff
11-23-2002, 03:15 PM
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Crank pullies are cake to make. I had one made off a cad file for my Dodge avenger. Almost everyone got 8-10hp to the wheels increase just by underdriving the accessories. So yes, i think its worth it. (Eric if your reading this, Im talking about Nicks pulley, but I made another off a cad file also).
People got on the band waggon after a couple years and started to say it was going to deteriorate the engine due to the dampening effects.
GUESS WHAT, i had nothing wrong with my car after 3 years. PLUS i had every bolt on part AND a 100+ shot of nitrous I ran frequently.
So, do i think it will screw up your car, NO! Maybe I just had a frankensien car haha.
People got on the band waggon after a couple years and started to say it was going to deteriorate the engine due to the dampening effects.
GUESS WHAT, i had nothing wrong with my car after 3 years. PLUS i had every bolt on part AND a 100+ shot of nitrous I ran frequently.
So, do i think it will screw up your car, NO! Maybe I just had a frankensien car haha.
11-23-2002, 09:25 PM
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Originally posted by Subw00er
How does one miss a... dodge?
How does one miss a... dodge?
11-23-2002, 09:41 PM
#14
there is a huge drawback, your AC, HEAT, PS, Alternator, and any other belt driven accesories will all give up some power,
pulleys do not "create" hp as do most mods, your power coming straight out of the engine remains the same, you simply re distribute that power away from accesories to the drivetrain.
AC on max can suck up ALOT of hp, like 10 or more, along with all the other stuff, you can lose 10% of your power. of course when you dyno your car, your alternator is most likely not kicking in, your PS is not working, and your AC is off. but next time your on a dyno, go once without all this, and then try it with AC on high, and the stereo running waiting for the alternator to kick in. youll find a severe drop in HP.
pulleys do not "create" hp as do most mods, your power coming straight out of the engine remains the same, you simply re distribute that power away from accesories to the drivetrain.
AC on max can suck up ALOT of hp, like 10 or more, along with all the other stuff, you can lose 10% of your power. of course when you dyno your car, your alternator is most likely not kicking in, your PS is not working, and your AC is off. but next time your on a dyno, go once without all this, and then try it with AC on high, and the stereo running waiting for the alternator to kick in. youll find a severe drop in HP.
11-23-2002, 11:19 PM
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It would be safe if they made a factory sized crank pulley but just in a light weight design. That way, you won't have any downfalls that underdrive pulleys have. The only thing is it'll cost a pretty penny for just a couple hp.
11-24-2002, 05:22 AM
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Once again my 2c.
I miss that car because it never cessed to amaze me. It was 99% mitsubishi then dodge. But thats another argument.
Anywho, yes it does underdrive the accessories but not a HUGE drawback as you mentioned.
Consider this, my particular vehicle had the following running on a 30% underdrive.......
1) Touch Screen TV
2) Venom 1000
3) Apex-i SAFC
4) 3 gauges
5) Higher Wattage bulbs and aftermarket sidemarkers
6) Rockford Amp pushing 2-12's
7) DVD player in the trunk
8) Aand then all the normal electronics
Even with all this on (which it always was) and the A/C.......it would not even dim at a stop light. So, im not terribly worried about anything.
I lived in central fl. for years with that thing. It was consistently 100+ w/ 99% humidity in the summers and even at a stop light it would produce the same amount of cool. A friend of mine even did a test out in california to record the differences before and after. Only maybe a 1-2deg change.
I miss that car because it never cessed to amaze me. It was 99% mitsubishi then dodge. But thats another argument.
Anywho, yes it does underdrive the accessories but not a HUGE drawback as you mentioned.
Consider this, my particular vehicle had the following running on a 30% underdrive.......
1) Touch Screen TV
2) Venom 1000
3) Apex-i SAFC
4) 3 gauges
5) Higher Wattage bulbs and aftermarket sidemarkers
6) Rockford Amp pushing 2-12's
7) DVD player in the trunk
8) Aand then all the normal electronics
Even with all this on (which it always was) and the A/C.......it would not even dim at a stop light. So, im not terribly worried about anything.
I lived in central fl. for years with that thing. It was consistently 100+ w/ 99% humidity in the summers and even at a stop light it would produce the same amount of cool. A friend of mine even did a test out in california to record the differences before and after. Only maybe a 1-2deg change.
11-24-2002, 08:01 AM
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This is direct from Stillen website and seems to indicate that this mod does not go after underdrive HP
Power gains are obtained in two ways. First, and most important, is the weight loss. An average of 2.7 HP is gained from every pound lost off the crank shaft. 85% of our gains are from weight loss. The rest of the gains are from underdriving, which accounts for about 15% of the total gains. Underdriving is not pushed for two main reasons. The main reason is to keep charging systems, air conditioning, power steering, and water pumps moving fast enough for every day driving. Second, not much horsepower is gained from extreme underdriving. In most applications all of the underdriving is done with the crank pulley, not the accessory pulleys. This is done so maximize weight loss can be achieved at the crank where most of the horsepower gains are found.
Power gains are obtained in two ways. First, and most important, is the weight loss. An average of 2.7 HP is gained from every pound lost off the crank shaft. 85% of our gains are from weight loss. The rest of the gains are from underdriving, which accounts for about 15% of the total gains. Underdriving is not pushed for two main reasons. The main reason is to keep charging systems, air conditioning, power steering, and water pumps moving fast enough for every day driving. Second, not much horsepower is gained from extreme underdriving. In most applications all of the underdriving is done with the crank pulley, not the accessory pulleys. This is done so maximize weight loss can be achieved at the crank where most of the horsepower gains are found.
11-24-2002, 10:25 AM
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Not to terribly hard. MAKE SURE ITS NOT soft aluminum though. You will have one hell of a time getting it back off some day if it is. Mine DIDNT come off.
The install was pretty simple. Just jack up the car, remove a wheel and inner fender plastic. Get an impact on the pulley and POP it off. Since this engine is more of a front to back style you would prolly have to take off the nose and hit it from the front. I dunno, havent looked.
The install was pretty simple. Just jack up the car, remove a wheel and inner fender plastic. Get an impact on the pulley and POP it off. Since this engine is more of a front to back style you would prolly have to take off the nose and hit it from the front. I dunno, havent looked.
