Upper Pulley Recommendation
Thread Starter
Pro
Joined: Mar 2018
Posts: 724
Likes: 192
Upper Pulley Recommendation
I have a Stock 15z with 17k miles on it. Other than an attack blue air filter the engine is bone stock. With it being 5 years old now I need to change the belt and I was entertaining the thought of putting an upper pulley and new belt on. I've done a little reading on this topic but I'm relatively green on the topic. Any recommendations on a pulley and belt combo that won't got crazy but will be a nice little wake up t the engine?
Last edited by I got your ZO6; Feb 10, 2021 at 11:08 PM.
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,478
From: South Florida
If you're open to porting the blower you can send it out to have it ported and install a pulley. I wouldn't go over 8-9% on stock cooling. Check out this pulley chart from weapon X and you will see what is the max safe increase is with out needing cooling upgrades.
https://weaponxmotorsports.com/blogs...ng-mods-needed
https://weaponxmotorsports.com/blogs...ng-mods-needed
Burning Brakes
Joined: Aug 2001
Posts: 837
Likes: 388
From: Olathe KS
I'm running a griptec 2.3 upper, stock lower, my installer re-used the OEM belt (I'm only at 5k miles), and I've had zero issues with it. If I had it to do over again, I would have either swapped to a Maggie 2300 or done a ported blower having them send it back to me after porting with the 2.3 griptec upper installed on it along with opening up the intake tract to the blower to match a 103mm TB. IMHO, it's easier to take the blower off the car and re-install it with a new pulley already on it then it is to get the pulley off and press a new one on plus you'll get a good chunk more rwhp from opening up the air intake to the blower, porting it, and changing the pulley. You could look into upgrading the cooling bricks like the newer Zs have if you port it too...
Thread Starter
Pro
Joined: Mar 2018
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I really wasn't thinking about porting the blower but you make a good point about getting the pulley off vs pulling the whole blower. I was thinking about upper pulley and having my throttle body reworked by Soler. I want to keep the stock blower look...maybe I should have it ported, new upper pulley and do a larger TB. The only thing that may make that cost prohibitive is if I go that route and if I have to change the bricks then I have to get the 17 and up lid and at that point I may as well get a Maggie 2300 like you said...I do want to keep the stock look though.
Last edited by I got your ZO6; Feb 11, 2021 at 10:58 PM.
