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Home » Public Forums » GMCnet » short trip report, new carb averaging 7 MPG (What size are the jets in a stock Q-jet?)
short trip report, new carb averaging 7 MPG [message #63570] Mon, 09 November 2009 11:19 Go to previous message
Duce Apocalypse is currently offline  Duce Apocalypse   United States
Messages: 824
Registered: May 2009
Location: Los angeles
Karma:
Senior Member

Well took the coach out for a run this weekend, and drove about 120 miles. approximaely 30% of those were city miles, and 70% freeway miles at 55-65 mph.

The new holley carb performed just fine, though im averaging only about 7 mpg, i'm guessing I have slightly larger jets then I need so I have ordered 2 sets of smaller primaries, and I will adjust the vac secondary. the power valve should be the stock 6.5 hg one which I onl see that kind of vac if I floor it, so I dont think I need to swap the PV.

the only real problem I had was when the coach adbruptly stalled out several times, turned out to be the PO had riged the batt wire on the coil with a quick splice when the coach as converted to HEI, therefore it had become corroded, and required on-site replacement, but I always pack a DVM and a set of electrical connectors as well as fairly compleate set of tools, so once the problem was identified it took 5 minutes to fix.

I have had no problems with her since, so just waiting for my tuning parts from summit for the carb....

stay tuned...


73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
 
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