Part IV:
Throttle Bodies
Size----Make-----CFM@28in
60mm---Ford-------526cfm
65mm---Accufab----616cfm
70mm---BBK--------726cfm
75mm---Accufab----845cfm
90mm---Accufab----1190cfm
On a stock motor, the 65mm made 2hp and 1tq more at the wheels than stock with the average being 1hp and 2tq more. Not so great huh? Out of those 5, the 65mm is better for a modified car, making as much as 5hp more and 6tq more than the 70mm with a car making a bit more than 330 hp at the wheels. The stock 60mm made more low end power than the 70mm but made less top end, so they are a wash. The stock TB ain't so bad! That's it!! Sorry guys, show's over.
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1993 Mustang GT - March Ram Air & Pullies, K&N, C&L 73mm MAF, Super Competition Hooker Headers, 2 1/2 in. mandrel bent cat back, High Flow H-Pipe, Pro 5.0 Shifter, 16* Timing Advance
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