| [GMCnet] what a difference a spring makes [message #325352] |
Mon, 23 October 2017 20:07  |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma:
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Senior Member |
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Ive been tuning my Qjet for a while now. I have a wide band O2 so I know what it's doing (even if I don't know what I'm doing).
I had it running at 15/16:1 pretty nice but it would go lean from about 15-8" of vacuum, then fine with the secondaries.
So I put in the 8" power piston spring, I really didn't want to as it seemed way too high.
But wow, that woke it up!
She now runs a nice 15/16:1 till you give her a little gas then it drops nicely into the high 13's as you put the throttle down.
At about 5 inches the secondaries open and if you can stop looking at the fuel gauge dropping like a rock, it really goes!
So I'm running 68 jets and the 8-12" blue spring.
Keith Vasilakes
Mounds View, MN
1975 ex-Royale.
Microlevel Ride height controller
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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