2003-04 Mach 1 Registry Owners Club - View Single Post - Under Drive Pulleys..and the problems they cause.

tmhutch · 09-03-2013, 04:53 AM

I'm not a big fan of those because they often don't center accurately but I don't think any underdrive damper will destroy an engine kept at 6k or under. On a 4.6 the strong harmonics don't kick in until 6500 RPM.

09-03-2013, 04:53 AM	#320
tmhutch 4v>3v>2v Join Date: Jun 2004 Location: Pacific Northwest Posts: 727	Re: Under Drive Pulleys..and the problems they cause. I'm not a big fan of those because they often don't center accurately but I don't think any underdrive damper will destroy an engine kept at 6k or under. On a 4.6 the strong harmonics don't kick in until 6500 RPM.