LT4 - pulley kit?

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Feb 19, 2019 | 06:30 PM

v8maro

Thread Starter

Racer

Joined: Mar 2009

Posts: 324

Likes: 1

From: Troy, MI

LT4 - pulley kit?

I'm buying an lt4 crate motor and will have a custom tune done to the car, so it'd be a super easy mod to do a pulley on the lt4 - what parts or kit do I need?

I found this one, but is this all I need? This is just an upper pulley right? Is it better to go with a lower vs upper?
https://vengeanceracing.net/2015-c7-...-hub-2-31.html

Feb 20, 2019 | 08:52 AM

6Speeder

Safety Car

Joined: May 2000

Posts: 4,824

Likes: 351

From: Albuquerque NM

I went with the Innovators West 9% lower. Reasoning was the upper reduces belt wrap and CAN cause slippage. Also you have to take the blower apart to install the upper. With the lower you just remove and replace the balancer. Good luck.
Wayne

Feb 20, 2019 | 09:59 AM

0TPR

Former Vendor

Joined: Mar 2015

Posts: 50

Likes: 20

From: Fairfield Ohio

Quote:

Originally Posted by v8maro

The 9% lower is a great choice, However if you're wanting more bang for your buck the 18% is worth even more boost while both being safe for pump gas.
We have them in stock
Happy to help

9% https://tprace.com/products/pulley
18% https://tprace.com/products/lt4-gen-...e-18-overdrive

Feb 23, 2019 | 05:25 PM

hogurt

Drifting

Joined: Oct 2002

Posts: 1,898

Likes: 35

From: Fairview Hts. IL

Quote:

Originally Posted by TPR

thats interesting. I think the stock upper and a 15% lower is good for about 12psi and 740whp. I bet this would be a good addition with forged rods/pistons. Probably 13psi and over 750whp... with the baby LT4 blower.

Feb 24, 2019 | 08:21 AM

0HorsePowerAddicts

Former Vendor

Joined: Dec 2009

Posts: 3,353

Likes: 166

From: 19804

Grab and AFE or Halltech intake and either a IW 18% or ATI 15% lower. I wouldn't bother with the 9% unless your just looking for a mild bump in power. We run the 18% in our stock blower builds.

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