What is the size of the pulley that came on my 2.9 whipple ? I'm looking to get a smaller pulley but I'm not sure the size of the one on there now? I'm assuming they all come with the same size pulley. It only made 8.4#s of boost on the dyno
2.9 Stock Pulley Size ?
- Thread starter gkviper192
- Start date
Before you look at going to a smaller pulley I would look at fuel system upgrades first.
That blower comes with a 4.00" pulley from Whipple. Every 1/4" smaller in diameter is roughly +2 psi, this is only a guideline though.
Oh, and I almost forgot, you can always just look at the face of the pulley. I am pretty sure that all Whipple pulleys have the size machined right on the face of the pulley.
Wouldn't try it. I know that some of the pulleys for the 2.3 for the 5.0 (and by extension the 2.9 kit for the 5.0 as well) require a spacer for proper fitment (early generation pulleys) and that later generation pulleys do not require the spacer.
They (5.0L) still do require the spacer. I ordered a few pulleys for a customer the other day and Mike asked to specify if it was an 05-2010 car or a 2011-2012 car.
If I go from a 4 inch to a 3.5 will I need a smaller belt or different idler?
Thanks for the replies on the pulleys. I'm going with the 3.5" with a metco 100mm idler up top, will have to see what belt works out best for that combo.
Anybody have info on belts they've used with the smaller pulleys on a 2.9 and where they started having slip issues?
Anybody have info on belts they've used with the smaller pulleys on a 2.9 and where they started having slip issues?
You should be able to use the same belt, but you need to add a 100mm idler to replace the stock one to take up the belt slack.
Looks like I'm going to pick up a 3.5 pulley and 100mm idler. I'm hoping this works without having to change the belt.
Any reason this wont work?
Any reason this wont work?
Users who are viewing this thread
