over-sized throttle bore diameter
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- Helpful MS/Extra'er
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over-sized throttle bore diameter
what problems will I have if I use a much larger throttle body?
Working on my EFI Thesis!
Have you looked at -- well -- "Throttle Bodies" under "Injectors and Fuel Supplies" on the Manual page.
Look at: http://www.megamanual.com/v22manual/minj.htm#throttle
Look at: http://www.megamanual.com/v22manual/minj.htm#throttle
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I run dual 65mm throttle bodies. With a large throttle body you will have large rpm gains with little throttle movement. I had trouble useing map enrich because of the "air dump" into the engine. My solution was to use alpha-n with a low v/s setting, my lowest is 0.7v/s with a 0.6ms squirt. I then doubled the value for the next bin, then doubled the value again and so on. This gave me a good starting point to tune the accel enrich. remenber v/s is volts per second of how fast you open the throttle. With a large TB you will not have to open very fast at all to make fast rpm gains. My setup is guiet driveable, no stumbles or surging.
1969 Dodge Super Bee
383 EFI dual 65mm throttle bodies, 36lb injectors
"AS SEEN ON TV"
www.moparalley.org/gallery/hollywood
383 EFI dual 65mm throttle bodies, 36lb injectors
"AS SEEN ON TV"
www.moparalley.org/gallery/hollywood