There seems to be some confusions when referring to various SC pulley sizes. I want to propose a naming convention to help identify what people are running.

There are two pulleys used and that can be changed; the dual alternator pulley and the SC pulley. I say we clarify this by adding ALT or SC on the end of pulley size statement. This is assuming the accessory belt portion of the alternator pulley is unchanged which it should be. Here are the one's I know of so far:

3.0ALT - Base SC Kit Alternator Pulley
3.275ALT - What is commonly referred to as the HBP.

3.8SC - Base SC Kit SC Pulley
3.5SC - The First Pulley I Had Made
3.3SC - My Current SC Pulley

I am currently running a combination of the 3.275ALT and the 3.3SC which yields about 8 PSI mean or nearly 9 PSI peak.

Running the 3.275ALT and the 3.8SC yields about 5.5 PSI boost, etc.

 

Although I am seeing 6.5 lbs of boost with the IMRC disconnected...... but we both know that is not a true 6.5 lbs of boost

 

That would be with the 3.275ALT/3.8SC setup with the IMRC disconnected. :o Maybe it still sounds confusing.

 

What is the Payne pulley equal to.

 

The current Payne is the ALT pulley and I beleive is available in a variety of sizes.

 

The Payn Tech pulley that I nick-named the Max pulley, would be a 3.55ALT, and would not be used with an SC pulley change, but did need the next size belt. The other size they made was a copy of the HBP, or a 3.275ALT.

 

what is ImRc???

 

Where can I purchase or have a new ALT pulley made? the 3.27ALT? Thanks.

 

Intake Manifold Resonator Control,....maybe

 

Comptech has it as their High Boost Pulley for our S/C Kit.

 

Intake Manifold Runner Control.

:search: You'll find all the info you need.

 

Nice to hear from you Brad, we have been missing ya.

Enjoying the lakes I hope...

 

Thanks for finally clearing up the pulley questions Steve.

 

I've been lurking alot and posting a little.

The weather, and fishing, on the big lake has been cooperative so far. The mechanicals are squared away, and the electronics are next. It's great to be back on the water. Don't wait too long to get back at it!

Nice job with all the Hope Systems projects!

 

I have about four years before Jennifer would consider it. That is unless I can convince the girls to make "suggestions" that they want a boat sooner. But I guess they do need to start talking first