|
Like I said. Extrudehone and port match the upper plenum. You can match the lower plenum and butterfly plate but gains would be very small.
Butterfly actuation is clearly described in the service manual.
IMO removing any butterflys will impair engine operation. Remember they are RPM controlled.
__________________
Started rebuilding IC engines in 1968 at the US Merchant Marine Academy. Don't think you know more than me about auto/IC/control systems unless you can document your education.
|