Thread: 6* of KR @ 5500 rpm

I'd just drop it more. I have a 3.25 pulley I can sell ya. You might see 15° of KR, but...least you can say you are on a smaller pulley!

Originally Posted by Garandpa

I'm on a 3.5" pulley because that's what was recommended for my tune. Maybe I should just blindly take the advice of internet trolls?

Sorry, not trolling just find it a little humourous. Timing does make a difference, it's not all about pulley sizes. 6° of KR might cost you 30-60hp. One pound of boost will not make up for that. Not to mention the damage u could be doing. Have u looked at your plugs?

Example. I tuned a 3" with no knock. Just dropped to a 2.8 and tuned for no knock. But I had to pull 2-3° of timing to do so. I'm in to higher boost earlier, but I could be losing a little or at best have little gain at the top. It's all guess work without a dyno. But I sure as hell wouldn't even consider the drop a success if I had 6° of KR.