2.2l non eco RKsport underdrive performance? - Performance Forum

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2.2l non eco RKsport underdrive performance?
Wednesday, November 25, 2009 10:33 PM
Hey what up guys im thinking about buying the RKsport pulley and just wondering what kind of gains i can expect from it (current mods are Pacesetter header, exhaust, cold air intake) Also do different belts make a difference in the performance? will the stock one's work?


its not how fast you go its how fast you get there

Re: 2.2l non eco RKsport underdrive performance?
Thursday, November 26, 2009 3:16 AM
You could save a little bit if you buy the ASP Pulley from Summit Racing, this one doesn't come with the RK Sport engraving. With any of the underdrive pulleys, you do need a shorter belt, due to the smaller pulley size.

If you plan on any moderate amount of power from your sound system, you don't want an underdrive pulley. MD -Enforcer- / LD9, Mike Davis is releasing a lightened pulley for the LN2's soon. This will turn the accessories the same speed as stock to keep the charging capabilities up, but having less mass to turn. You also won't have to replace the belt.






Re: 2.2l non eco RKsport underdrive performance?
Friday, November 27, 2009 12:40 PM
Jack knows his stuff.




PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: 2.2l non eco RKsport underdrive performance?
Sunday, November 29, 2009 6:43 PM
hey guys thx for the links and input ive done a little more research and was wondering if the pulley would overheat my car since its slowing the waterpump down so much considering its still my daily driver


its not how fast you go its how fast you get there
Re: 2.2l non eco RKsport underdrive performance?
Sunday, November 29, 2009 6:59 PM
Duralast 817K5 - Thats the belt you want with A/C

I have basically same engine mods, no overheating or voltage issues here.

Possibly felt a little increase in power but could very well have been in my head.





Re: 2.2l non eco RKsport underdrive performance?
Tuesday, December 01, 2009 7:35 PM
What kind of power stats would one see from the 25% decrease in size?
Re: 2.2l non eco RKsport underdrive performance?
Tuesday, December 01, 2009 8:01 PM
I've done alot of research and companies claim anywhere from 6-14 hp but being realistic im thinking more around 6-8 hp


its not how fast you go its how fast you get there
Re: 2.2l non eco RKsport underdrive performance?
Thursday, December 03, 2009 5:08 PM
I honestly did not feel much of any difference at all when I swapped mine out. I got one made custom from billet aluminum to the stock size, and the factory pulley might have weighed 6 ounces more. They kept that pulley really light for these cars

Hope is not a plan. Change is not a destination.
Re: 2.2l non eco RKsport underdrive performance?
Thursday, December 03, 2009 5:16 PM
Anybody know the part number for the mantapart pulley that's talked about in one of the stickys?
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