[Bulk] Re: [Bulk] [Diy_efi] Steve Ravat, CX 500 EFI?

[Steven P. Donegan]

Well, send me a list of stock inputs and outputs and perhaps I can
design something to fit 'exactly' for your application. It will likely
just be a subset of what I'm already doing for my V8's...

What I need to know is the input type - voltage/frequency etc and the
outputs - the rest is pretty darn simple :-)

On Fri, 2007-01-05 at 09:29 -0800, Ernest Buckler wrote:
> Steve,
> 6x6x2 is very similar to OEM case on the CX 500 Turbo.  Yup, same 80? V-twin 
> with two ign. triggers. Way oversquare, 4-valve heads, pushrods, but very 
> short, so redline is still 10K.  CR for carb versions is 10:1, turbos are 
> 8:1.  Very strong engines - with one weak link, the alternators are buried 
> in the rear case thus overheat and fail about 30K miles, require total 
> engine removal for access (ign. triggers are also in there).  I don't like 
> the OEM wastegate, either, as extended sitting can cause a non-serviceable 
> flapper shaft to seize.  It's a common style, with overpressure causing a 
> flap at the header ex. flange to open.  I'm interested in a small "tower" 
> (?) type if you know of such a thing.  Honda no longer supports these, so we 
> owners are on our own. Plus factory sensors run $200-$300 and up - and there 
> are 7 of them.
> Ernie
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Steven P. Donegan" <donegan at donegan.org>
> To: <diy_efi at diy-efi.org>
> Sent: Friday, January 05, 2007 9:00 AM
> Subject: Re: [Bulk] Re: [Bulk] [Diy_efi] Steve Ravat, CX 500 EFI?
> 
> 
> > At the moment all I've done is the input board - which ends up being
> > about 2.9x2.3 inches the CPU board is about that size - so total real
> > estate at the moment is roughly 2.5x6 inches - I expect the output
> > driver boards to be like 1x6 each - so a rough guess right now would
> > make the overall dimensions in the 5x6 or perhaps 6x6 range - and other
> > than case/heat sinks etc I would expect no more than 1 inch deep - so
> > worts case figure 2 inches deep by 6 inches square, not huge but not
> > tiny either. For space constrained applications I could do the design in
> > surface mount but that would mean it gets fabbed 100% by a vendor and
> > that probably means cost...
> >
> > If I do a version of this just for motorcycles I can goal seek for small
> > size - my current goal is to fit my Z28 Camaro (1998) and my 1985
> > Mustang (B&M supercharged carb'd engine at the moment - and carb is
> > really crummy for that application). If I do a bike version it will be
> > with the goal to fit exactly where my EFI computer fits now on my 2004
> > Dyna...
> >
> > Is the CX 500 the Honda V-Twin of old?
> >
> > On Fri, 2007-01-05 at 07:27 -0800, Ernest Buckler wrote:
> >> Steve,
> >> Any estimate for overall dims of the final package?  OEM box on these
> >> machines is not tiny, and there's more room under the tailpiece.
> >> Ernest
> >>
> >>
> >> > Although what I'm designing is intended to be 'universal' it may be a
> >> > tad large (physical size) for a bike. I do intend to play with it on my
> >> > Harley at some point but it is primarily intended for V8 applications.
> >> > If size does become an issue I could shift some or all of it to surface
> >> > mount - the down side is that would effectively take it out of hobby
> >> > land as most folks are not going to have the tools to do surface mount
> >> > stuff at home...
> >> >
> >> > On Thu, 2007-01-04 at 23:22 -0800, Ernest Buckler wrote:
> >> >> Steve,
> >> >> Lost your direct email, so a question here: Any further work being 
> >> >> done
> >> >> that you might know of for replacement EFI for the CX turbos?
> >>
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