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Aftermarket Lightweight Pulleys, Do They Really Make A Difference?

INLINE6

By INLINE6,
in Engines & Forced Induction

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INLINE6

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Hey guys,

I own a R34 GTR, recently my power steering belt snapped so i took it back to my dealer because it was still under warranty. They told me that the aftermarket pulley that was on my car was made for a R32, thus the reason why the belt came off. Okay true, i understand that bit.

After a few days, i headed down to the dealers mechanic to pick up the car, from what i can see the pulley was replaced but strangely enough i noticed that the balancer was also replaced. I was running an after market one from what i could see when i first picked up the car. (They told me they didn't change it, and only replaced the pulley and the alternator pulley but the aftermarket alternator pulley is still there)

Anyways, driving the car back it felt very different, it was no as responsive as it was before, it just didn't have that little edge it once had. (Noting that the car was tuned, Power FC, cams, and full exhaust)

I was just wondering by changing the pulleys back to standard would it make that much of a difference that i can feel a change in power delivery? Or was my assumption of them changing the balancer as well contributed to the change of responsiveness i now have in my car?

I am pretty upset about this as I have no proof to say they did and I did trust them enough to leave my car to them.

Any help will be greatly appreciated.

Super Drager Mentor

Super Drager

Posted
Posted

Lightweight crank pulley = less rotating mass for the crankshaft to turn. Might free up a few kw depending on how much of a weight difference there is between stock & aftermarket. I have one on my car and it makes a small but noticeable difference.

INLINE6 Collaborator

INLINE6

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Thanks for that, when i mentioned pulley they replaced the aftermarket crank and the power steering pulleys. Was that necessary if it was only the power steering pulley that was not aligned properly?

INLINE6 Collaborator

INLINE6

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the name was rocket something... or vise versa. the reason i knew is i had a look at it before i took the car there, and when i had a look at it again at the workshop it was sitting in the passenger side floor and i had the stock one put back in.

That's what i thought, only the power steering required changing. Damn got robbed.

The thing that got me was when i asked for the parts back i was told they never replaced it when it was obviously clear it was. All the belts were changed back to stock as well.

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