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The one thing I am looking for more info on is an underdrive pulley for the 2.4L. I havent found much info so far. has anyone any feedback about their installs? I would like to know how it affects the performance of the engine before I look to purchase. And if the results are worthwhile, does anyone know of a shop in Canada where I can buy from? Feedback would be appreciated.

I have only recently registered on this website, but I have been checking it out for years. I previously owned a '90 Z24 and a '94 sunbird, and though the interest in modifying those cars was there (especially the '90 Z24... nice ride), the wallet was a little light in those days.

Anyways, just wanted to introduce myself somewhat. I look forward to replies, cheers...
 

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My udp works great and I'm running a stock 3.1.

But to answer your question I believe there are udp kits available for the 2.4 and the performance gain is noticeable more-so if you drive stick, a worthy mod.

Just so you are aware the gain is rather minor (about 5 hp) and you will get used to it rather quickly... I still say it is a worthy mod.
 

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The 2.8/3.1/3400/3500 Underdrive pulleys help out a bit but provide nno dampening because these engines are internally balanced. The one for a 2.4 L is probably the Ebay knock off and won't do much for you, because I am sure those 4 cylinders aren't balanced and need a dampener.

But yet again I am not 100% on this but I see those pulleys on ebay all the time and I'm like...ehhhh..I'll pass.
 

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im pretty sure the 2.4 uses a dampened pulley and no one to my knowledge makes a dampened pully, i've heard of some people using a 2.3 HO crank pulley, i think its smaller not sure tho but that would be dampened, maybe look into that
 

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I've got on Unorthodox Racing crank pulley on my 2.4 Its the same size diameter as the small h.o. pulley, but the weight difference is night and day. There's a lot of people who have put a lot of miles on 2.4s with undampened underdrive pulleys, so I don't worry about mine. I've got over 40k miles on Unorthodox pulley.
 
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