pulley upgrade on a stock Joe Gibbs?
#11
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
i dont think there is a performance diff u jus cant put a keyed pulley on a non keyed shaft jus get u a quick change pulley kit from pulleyboys then u can swap pulleys real fast
#13
TECH Junkie
iTrader: (9)
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
I bought my truck used, and it didn't come from the dealer with a supercharger. When I got it, I wanted a supercharger. I found one on eBay, and purchased it. It came with a 3.1, and a 2.9, and was a keyed snout. I ran the 2.9 for a while, and without meth I was pushing about 10psi. I ended up running a best of 12.49. My IAT's were quite high crossing the traps, and I wouldn't suggest going much smaller without meth, and the stock magnacharger cooling system. I have since went to a 2.6 pulley (It requires machining the snout), and turned on my water/meth. hopefully if things go right I can go to the track Sunday for the last day it is opened.
Don't forget that boost is actually a restriction of air entering the engine. So all of the stuff in my sig actually lowers boost. Heads, cam, headers, free flowing exhaust. That same pulley will make more boost on an engine with no mods.
Don't forget that boost is actually a restriction of air entering the engine. So all of the stuff in my sig actually lowers boost. Heads, cam, headers, free flowing exhaust. That same pulley will make more boost on an engine with no mods.
#14
TECH Apprentice
iTrader: (2)
Join Date: Dec 2004
Location: Roch. NY.
Posts: 390
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
I have a 3.3" pulley and see 8 psi on mine with mods in sig.. Keep in mind the smaller the pulley the more heat you will see on your IATs. I added an additional intercooler in series with the stock cooler for lower IATs.. Next mod might be a 90mm J-tube and an LS3 TB with an X-link. Having trouble finding a good tuner since zippy moved away so this is on hold.
![Sad](https://www.performancetrucks.net/forums/images/smilies/LS1Tech/gr_sad.gif)
#15
11 Second Hall Moniter
iTrader: (22)
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
Personally, I'd rather have a keyed pulley and shaft, than a press fit. For the same reason that I'd recommend pinning your crank pulley. At your stock & relatively low boost levels, it's not an issue at all. But since you are wanting to "turn it up"......
I'm sure BlownChevy would like to groove your shaft for you.
I'm sure BlownChevy would like to groove your shaft for you.
![Happy](https://www.performancetrucks.net/forums/images/smilies/LS1Tech/gr_stretch.gif)
Thread
Thread Starter
Forum
Replies
Last Post
Suburban2500
INTERNAL ENGINE MODIFICATIONS
31
07-19-2015 04:50 PM