Is it that simple to install an under drive pulley kit that there isn't even a DIy posted?

 

Pretty much... and that we try to tell people not to even waste their money on it.
I have the AP pulley... biggest waste of money I spent on this car.

Check out this post:
https://www.rx8club.com/showpost.php...9&postcount=34

 

I saw one site that posted dyno graphs indicating the rx8 they had was boosted by twelve horsepower by installing the under drive pulley kit.


You did and didn't notice anything better/different?

 

I just picked one of these up for cheap ($50) so i'm hoping it's not that big of a waste of money but i dont have high expectations. I may end up uninstalling it when i get the Mazmart waterpump since it wont need to be underdriven.

If it revs a little freer and reduces water cavitation at high rpms for my track days from now until mazmart pump i'll be happy.

 

DIY for pulleys:
1. remove old pulleys
2. install new pulleys
3.
4. profit

 

Of course... everyone is so fixated on "what mod will give me the most HP" that they believe anything they read on the internet.
If the company posted a 1HP gain with their product, would you spend over $100 for it?
Of course not... they posts stuff like that so you blindly spend money on their product.

Different yes... better no.
My A/C isn't as cold because the pulley used to drive it is now under-driven.

 

i installed a full set of lightweight pulleys, dealt with the hassle of finding smaller belts.... And no matter how much i tried i couldnt feel a bit of difference in anything. Free reving in neutral it might rev up a tad faster but thats it. Waste of money i shouldve bought a bottle of JW Blue instead