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Old 06-29-2009, 07:42 PM   #1
92GreyGT
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Default EFI 393 throttle body size question

I am building a N/A, pump gas, 393 Windsor engine using a 69' block, DSS rotating assembly, AFR 205 heads, and a Comp Cams hydraulic roller. I am keeping the engine fuel injected and I can't get a straight answer from anyone on what size throttle body to run. I am going to use the Trick Flow intake for the 5.8 but they have two versions, one with a 75mm opening and one with a 90mm opening. Which one do I use? Thanks
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1992 Mustang GT 3375 lbs. w/driver
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Old 06-29-2009, 10:03 PM   #2
Joel5.0
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90mm.....
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Old 06-29-2009, 10:12 PM   #3
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I hope you are planning on running the Box R
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Old 06-30-2009, 12:34 PM   #4
fs308
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agreed a box r with a 90mm throttle body. the motor is going to require a lot of air to feed it
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