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Old 04-18-2012, 11:42 AM   #6
hoveringuy
Registered User
 
Join Date: Aug 2008
Location: Seattle
Posts: 209
My Ride: e30
Quote:
Originally Posted by aggieE46 View Post
I hit 7k daily and have done so for 120k on the car. It has 162k on it.

No need to hit it if you aren't making power there, though.
When are the harmonics really an issue? You make it sound like transients in the 7k range aren't a concern. Are the pumps only breaking in track use, when rpms are held in that range? Has anyone had a pump break from street use?
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