| Re: [GMCnet] what a difference a spring makes [message #325386 is a reply to message #325360] |
Tue, 24 October 2017 13:24   |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
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Keith V wrote on Mon, 23 October 2017 20:26I'm really hoping for a bit of improvement MPG wise, the vacuum looks to be a bit higher, and it struggles less on uphill grades.
I could see that it was going lean before the power piston started working, so the heavier spring made sense.
WBO2's are cheap these days, I cost justified mine just by fuel usage. Hopefully I will be right about that ha ha ha.
I would not use my coach as a tuning example, except that you need time and a WBO2 to do it right 😊
my engine is over bored, re-camed, has C heads, filled crossover, headers and 3" exhaust. It's not stock in the least
I'm sure you're right Keith. Trying to tune the Q-jet without a WBO2 gauge would be a flying you-know-what in the dark at best. My engine is all stock except for a double roller timing chain (set straight up) a new pair of K-heads, a Gary Rockwell intake manifold, and a Paterson distributor with MSD dash adjustable ignition. I am running a 3" exhaust though and all that through a 3.70 final drive.
The fuel requirements would be different for a fresh engine with a different cam, for sure.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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