>From what I know about carburetors and still applies to throttle body FI is; >the smaller the venturi the better the response, larger gives better flow at >high engine RPMs. I would expect a CBR that turns 16K to have a much larger >carb than a NH turning 9K. You have to figure out what CFM your engine will >draw at max RPM and then use the smallest carb/FI unit that can provide it, or >slightly less. Sent via BlackBerry by AT&T
-----Original Message----- From: Kurt Nolte <vturbine.po...@gmail.com> Sender: nighthawk_lovers@googlegroups.com Date: Sat, 30 Jun 2012 00:58:33 To: <nighthawk_lovers@googlegroups.com> Reply-To: nighthawk_lovers@googlegroups.com Subject: Re: [Nighthawk Lovers] Has anyone tried to retrofit EFI to a 1991+ CB750? Reviving this thread, as I (oops) forgot to answer this question and because I wish to appeal to the wisdom of the group. CBR600 (and 600RR) bikes have 40mm throat diameter throttle bodies. Stock NH650 had, at biggest, 32. Will adding 8mm of throttle throat produce a noticeably "twitchy" throttle response? Anybody here have experience with big carbs on an older Nighthawk? As a sidenote, GSXR600 throttle bodies from an '08-09 model are 38mm, from what I can tell. Slightly less, but will it make a huge difference? All my conversion experience is on bigger, single throttle or progressive throttle body MPFI engines. A 50mm throttle body for those was a huge upgrade from the 30-40mm original throats... Kurt On Sat, Jun 9, 2012 at 12:38 PM, Gary Prost <prostg...@gmail.com> wrote: > Wow. Lots to think about. Does the CBR600 unit have to be modified at all > for differences in air flow? > > On Fri, Jun 8, 2012 at 8:01 PM, Kurt Nolte <vturbine.po...@gmail.com>wrote: > >> Oh, intend full compliance with Rule #1: Always post pictures. >> >> With luck, there will be zero instances of Rule 34 in this project. ;) >> >> -Kurt >> >> >> On Fri, Jun 8, 2012 at 10:33 PM, Kyle Munz <kyle...@gmail.com> wrote: >> >>> Please take pictures of this project, it should be interesting. >>> >>> -- >> You received this message because you are subscribed to the Google Groups >> "Nighthawk Motorcycle Lovers!" group. >> To post to this group, send email to nighthawk_lovers@googlegroups.com. >> To unsubscribe from this group, send email to >> nighthawk_lovers+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/nighthawk_lovers?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To post to this group, send email to nighthawk_lovers@googlegroups.com. > To unsubscribe from this group, send email to > nighthawk_lovers+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lovers@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lovers@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
