Edelbrock Competition Supercharger 6-Rib Pulley Upgrade; 2.625-Inch

Simple install great results.

Very easy to install. Loosen bolts before removing belt, swap pulley, tighten bolts. Increased boost by about 2 pounds. Needed to retune, but results were very noticeable.

2007 GT Eforce

I bought this 3.5 pulley because I live in Colorado. The altitude here required the 3.5" pulley to get the same boost the stock pulley gets at sea level. I get about 7 psi boost a little more than 5psi @ sea level with stock 3.875 pulley.

As stated

Quick shipping straight from eldelbrock. perfect fit

Solid little upgrade

Adds about 25-30hp more unquestionably for around 50$ over a 3.50 and that's real bang for your buck.

Edelbrock Eforce supercharger 3.5 in. pulley

Night and day difference ! About 8lbs of boost increase with this pulley vs. 5lbs stock pulley.still safe for stock engine.

More boost

If you have the edelbrock eforce this is the same pulley size that comes in the stage 2 kit, if you are looking to convert from a stage 1 like i did you need to get a better fuel pump, the gt500 dual fuel pump is whats also used in the stage 2 kit, you need 60lb injectors, and you need a new surpentine belt the belt is a 6 rib 103 inch belt edelbrock uses the goodyear gatorback. Edelbrock themselves told me that i shouldnt go any smaller than this with a stock bottom end i had the 3.5 pulley for the longest time and it did just fine cant wait to see what will happen at the track with this pulley

It's a pulley

It does what it's supposed to. I mean it's the second largest pulley they offer and it has a slight amount more boost that the 3.875 since it's almost 1" smaller in circumference. It takes a bit of wiggling to get it on and aligned with the threads but a little patience and you'll be good to go.

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The pulley is rater snug when trying to put it on the supercharger. It was a bit annoying trying to line up the holes while trying to push it down the shaft. But eventually I got it on and all is good. No problems yet.

Boost Without Bust

Adding the 3.50" pulley brought the boost to a still-safe 9 lbs, bringing the RWHP to a road-dominating 403 (about 466 hp at the crank). The install was very easy, but the change in boost requires further mods: a new custom tune; a slightly smaller serpentine belt; and a booster for the fuel pump. The blown GT, already fast, now it feels like the "Millennium Falcon."