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Daox · 01-22-2018, 01:10 PM

4" is not going to gain you anything. If anything, I'd go smaller. It should increase velocity and while it may choke at high rpm & load, at lower rpms you may see a small torque increase (which can also lead to a FE bump).

01-22-2018, 01:10 PM	#42 (permalink)
Daox Administrator Join Date: Dec 2007 Location: Germantown, WI Posts: 11,203 CM400E - '81 Honda CM400E 90 day: 51.49 mpg (US) Daox's Grey Prius - '04 Toyota Prius Team Toyota 90 day: 49.53 mpg (US) Daox's Insight - '00 Honda Insight 90 day: 64.33 mpg (US) Swarthy - '14 Mitsubishi Mirage DE Mitsubishi 90 day: 56.69 mpg (US) Daox's Volt - '13 Chevrolet Volt Thanks: 2,501 Thanked 2,586 Times in 1,554 Posts	4" is not going to gain you anything. If anything, I'd go smaller. It should increase velocity and while it may choke at high rpm & load, at lower rpms you may see a small torque increase (which can also lead to a FE bump). __________________ Current project: A better alternator delete