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Based on my inexperienced opinion, I would not use those.
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Just wanted to confirm the AP Pulley DOES fit on the s2 with no issues. The way it's machined if the holes aren't lining up, you just have to 180 it and everything lines up as it should. I'll also agree with what has already been mentioned, there's no noticeable gain or difference from stock.
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Originally Posted by MinHoSII
(Post 4188482)
Just wanted to confirm the AP Pulley DOES fit on the s2 with no issues. The way it's machined if the holes aren't lining up, you just have to 180 it and everything lines up as it should. I'll also agree with what has already been mentioned, there's no noticeable gain or difference from stock.
Now to deal with my check engine light for cylinder 2 misfire :sad: |
Waste of $$$'s as usual...
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Originally Posted by MinHoSII
(Post 4188482)
Just wanted to confirm the AP Pulley DOES fit on the s2 with no issues. The way it's machined if the holes aren't lining up, you just have to 180 it and everything lines up as it should. I'll also agree with what has already been mentioned, there's no noticeable gain or difference from stock.
Not sure why yours fit bro, but we turned mine every way imagineable and no way that thing was going on my car .... so I guess there's a possiblility your car received the s1 version from the factory for the pulleys .... which i've heard happens sometimes .... but wasn't anyway they were fitting on mine. From what i've read, pretty much a complete waste other than appearance anyway. |
Originally Posted by bcdjudo7
(Post 4188846)
Not sure why yours fit bro, but we turned mine every way imagineable and no way that thing was going on my car .... so I guess there's a possiblility your car received the s1 version from the factory for the pulleys .... which i've heard happens sometimes .... but wasn't anyway they were fitting on mine.
From what i've read, pretty much a complete waste other than appearance anyway. |
Originally Posted by RMXG8
(Post 4003871)
i tried to install the ap pulley on my 09 the hole for the bolts didnt line up.anyone have this problem?
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Mine worked on an S2, but there was a CEL for the first 50 miles or so.
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A CEL from a pulley? What was the code?
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Yeah, better check it out.
The only pulley that's safe to underdrive is the AC pulley, but then you may as well just remove the AC altogether. |
Originally Posted by UnknownJinX
(Post 4859053)
Yeah, better check it out.
The only pulley that's safe to underdrive is the AC pulley, but then you may as well just remove the AC altogether. |
Mind to elaborate?
Most of the posts before have said it's not worth it, and the explanation from RIWWP makes sense. Pulleys Don't. You might ask "why?", so here is an explanation: There are 2 "benefit" points to changing to aftermarket pulleys. The 1st "benefit" is a reduction in the weight of the pulley. This is a similar concept to going with a lightweight flywheel to assist with a more responsive engine. The problem is, the weight you are saving is very very very small, and it's close to the center of rotation, so there is very little gain by reducing it. It takes roughly 10lbs of weight saved at inch from the center of rotation to equal the interia savings of 1lb of weight saved at 10 inches from the center of rotation. Lightweight flywheels are still rather large in diameter (almost larger than the core engine block), and much of the weight stripped is near the outside of the flywheel. Pulleys have only a few inches and at most maybe a pound, and most of the weight to remove is near the center. It just isn't going to give noticeable gains for the price. The 2nd "benefit" is to underdrive one or more accessories. The problem with this is that under driving your alternator is bad for your electronics and battery, and underdriving your water pump can have significant penalties to your ability to keep the engine cool. And all it takes is 1 overheating, or even undetected localized hot spotting, and your housings can warp and your engine is done. Underdriving your A/C is without penalty, but removing the AC system completely would accomplish the same AC effectiveness as underdriving it, and leave your car lighter and without the AC compressor drag at all, so it's the better choice (and cheaper). |
Originally Posted by UnknownJinX
(Post 4859055)
Mind to elaborate?
Most of the posts before have said it's not worth it, and the explanation from RIWWP makes sense. Same for the alternator. Underdrive only a negative for those that either sit in traffic a lot or run a large electrical load. The overall benefit is indeed small however. FWIW i don't run one with a turbo setup .... but I don't rev to 9000 either . |
I can reply topics but cannot start one????
Any help Admins??? |
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