The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

Pyrotechnic · 03-08-2012, 10:38 AM

Well that's the thing, I'm not even into the secondaries when it's going lean. This is a scenario where I'm rolling 65 MPH in 1:1 gear and I lean into the throttle to make the vacuum drop into power valve territory.

Well, at least I don't think I'm into the secondaries yet. Certainly doesn't feel like they are compared to when that motor is at WOT. I figure my vacuum would be zero if the secondaries were open?

03-08-2012, 10:38 AM	#3
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: Holley HP Steet wideband tuning Well that's the thing, I'm not even into the secondaries when it's going lean. This is a scenario where I'm rolling 65 MPH in 1:1 gear and I lean into the throttle to make the vacuum drop into power valve territory. Well, at least I don't think I'm into the secondaries yet. Certainly doesn't feel like they are compared to when that motor is at WOT. I figure my vacuum would be zero if the secondaries were open? __________________ 1977 GMC Sierra Grande