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Discussion Starter · #1 ·

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I have the lightweight pulley ordered. I am using the Agency Power pulley. I think it is one pound less than the one you are looking at. It makes sense that lowering the rotating mass should give some benefit to the engine performance. As for the throttle body spacer, I'm not convinced as the cars computer should compensate for the extra air flow by adding more gas. From what I have read about these types of spacers they do not work. I may be wrong but until I see results I'm not buying it.
 

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gr8scape said:
I have the lightweight pulley ordered. I am using the Agency Power pulley. I think it is one pound less than the one you are looking at. It makes sense that lowering the rotating mass should give some benefit to the engine performance. As for the throttle body spacer, I'm not convinced as the cars computer should compensate for the extra air flow by adding more gas. From what I have read about these types of spacers they do not work. I may be wrong but until I see results I'm not buying it.
(gr8scape) What is the part number for the Agency Power Pulley you have on your xB2? When I went to their site it did not specify model year and shows a first generation xB in a photo...nor did it specify the weight of the pulley...is this a reasonable DIY or are special tools required. I'm with you on the "throttle body spacer.."


Brewski
 

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I am running the NST pulley. Great product for sure. You can tell a difference in the throttle response for sure.

They are the same pulleys as the tC.
 

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How much of a PITA is a pulley install?
 

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Honestly not bad at all. The hardest part is getting the belt back on. Cause you have to have someone pull the tensioner for you and you wrap the belt around the pullies and you are set.

Getting the old one off is kinda a pain if it has been a while. I did mine right away so it was still fairly new. I just used a impact to get it off there. Then slid the new one on and tightened it down by hand with a torque wrench.
 

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Discussion Starter · #9 ·
eviljack said:
Thanks for this thread. This was a mod I had planned to do and totally forgot about.
great minds think alike! :D
 

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Discussion Starter · #10 ·
so has anyone had success with throttle body spacers? or is it just like a billet paperweight after a while?
 

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When you guys are putting the pulley on the engine do you need to make note of where the timing mark is and have the replacement pulley's mark match up? I'm looking at stimulating the economy and the performance of my box.

Hap
 

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The pulley has a key way so it will only fit one way. Remove the wheel and use an Impact wrench to remove and replace. That's about it. You will feel a difference.
 

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I stopped by fastscions yesterday after work and bought the aluminum pulley and had it installed... I can tell that the RPM's do rev. up faster....
 

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On new cars they are pretty much pointless. On vehicles with carburetors they are worth there weight in gold.
Certainly true for the versions that swirl the inflowing air (pretty much all).

An accurately balanced light weight crank pulley helps street responsiveness. It passes more transient engine rotational energy to the drive train (immediate acceleration), however, it doesn't effect real power.
 
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