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Old 03-22-2012, 07:22 PM
Cobrajames's Avatar
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Join Date: Dec 2001
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Cobra Make, Engine: SPF 2303, Titanium Silver, Roush 427 SR/TW, AED Carb, Firefly Sides, TKO 600
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I have been getting 12 to 13 mpg in my SB 427 with 512hp/521ftlbs. It has a TKO600(.82 5th) and 3.46 BTR rear end with 295/50-15 tires.
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Old 03-22-2012, 08:04 PM
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Join Date: Dec 2011
Location: York Co. Maine USA, ME
Cobra Make, Engine: ERA 427 S/C W/Holmon Moody Original Nascar build #508 Iron Block/heads (C5AE-H) Bal/Blu 427 Sideoiler; 780 Holley Dbl. Pump; 4 Speed Top Loader; AP Racing Bks; IRS; 15" Trigo pins
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I have a 427 FE sideoiler, single 4, 4 speed & 350:1 gear. My tires are 15's & 26.5 dia. She's a thumper with 500+ hp. I did 200+ miles today in the white mountains N.H.. Up the Kangamangus hwy. & back home. My foot got a little heavy more than once I got 11 mpg average!! About the same as my snowmobile But way more fun Me thinks something is afoot with your sbf You might consider fuel injection! it usually improves milage alot Or a rebuild
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Old 03-23-2012, 09:43 PM
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Cobra Make, Engine: SPF 2613 Titanium w/Black, Roush 402SR
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Quote:
Originally Posted by Cobrajames View Post
I have been getting 12 to 13 mpg in my SB 427 with 512hp/521ftlbs. It has a TKO600(.82 5th) and 3.46 BTR rear end with 295/50-15 tires.
Pretty much the same thing with my 402 SR/TW Roush. SPF with the same set-up.
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Last edited by Got the Bug; 03-23-2012 at 11:08 PM..
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