Lean at top end - 460 Ford Forum
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post #1 of 3 (permalink) Old 10-14-2017, 10:01 AM Thread Starter
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Lean at top end

89 Mustang 2900lbs
521" BBF
SCJ alum headed
9.5 compression
FMS 514" Solid roller
FMS intake
1050 Quick Fuel Dommy no PVs jetted 90 Front 100 Back 35 squirters
PA Racing C4 5500 converter
Moser 9inch w 3.70 gear
Shifted at 6500

Foot brakes a 1.26 60 ft
1/8 mile 6.13 at 112
Qtr in 9.72


The problem lately is towards top of track the wideband leans out and will hit upper 13s and lose power/ break up. Ive jetted up and down and changed bleeds to no prevail. I have a 16x4 KN filter w the element lid but switched to the chrome lid and still no change. Running out of ideas
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post #2 of 3 (permalink) Old 10-14-2017, 10:02 AM Thread Starter
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Forgot this happens on pump gas 93 and VP 112 both
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post #3 of 3 (permalink) Old 05-17-2018, 10:05 AM
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Drag only car? Why would you not square up the jets? why 90/100? Try 95 square.

572CI 1978 Mustang Cobra II-Ron's Terminator-Alky Injection
532CI 1972 Maverick-Ron's Terminator-Alky Injection
2000 Excursion 7.3 Powerstroke "TS-6 position chip"
2001 F250 7.3 Powerstroke "TS-6 position chip"
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