|
|
Hi Dale, not unkind to present an alternative to the unimaginative {:>). I
understand that there are other alternatives such as the one you mention.
However, in my case, the 1/2" distance added by your suggested insert (at
least for the primary injectors in the block) would preclude me using my
current intake manifold. Bearly sufficient room between the upper manifold
runners and the injectors to screw on the fuel fitting as it is. Also I
would then need to add a spacer to the injector holder rail (not a biggy I
agree) to accommodate the additional height.
So not quite so simple (in my case at least) of just milling an adapter
insert. However, your suggestion may well be the answer for those with a
different intake set up.
If you do find the GM v6 injectors have the flow rate required (36-45
lbs/hr) and having a smaller nozzle diameter than the Mazda injectors (which
would just require a bushing) and cause no increase in installation height
then I would be very interested. Please let me know one way or the other.
Thanks
Ed Anderson
----- Original Message -----
From: "Dale Rogers" <rogersda@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, December 09, 2004 11:20 PM
Subject: [FlyRotary] Re: fuel injector mounting
Ed,
It's not my intention to be unkind, but the answer:
> However, they will not fit the Mazda injector holes. You would have to
mill/drill out the primary holes in the block to get these to fit.
>
seems to lack imagination. I can't yet tell what the "real"
cost of such would be, but I'm certain that I could make
"step down" adapters that would only add about 1/2" to the
height of the injector. Probably have to use a custom
fuel rail, but extruded aluminum for those isn't horribly
expensive. The total will almost certainly come out less than a set of
Mazda injectors, and it only needs to be
done once.
I was thinking of trying some injectors from a late
'80s GM V6, except I haven't yet been able to get a flow
rating for them. The electrical connectors are an exact
match for the Mazda units, but the ends are the opposite
of the Ford problem, I'd need to machine bushings to
fill in the hole in the rotor housings (no change in
height.)
Regards,
Dale R.
> From: "Ed Anderson" <eanderson@carolina.rr.com>
> Date: 2004/12/09 Thu PM 05:39:45 EST
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: fuel injector mounting
>
> Exactly right, Ken. There are certainly cheaper injectors out there
that flow the same rate as the Mustang and others. However, they will not
fit the Mazda injector holes. You would have to mill/drill out the primary
holes in the block to get these to fit.
>
> The Mazda 460 cc/min are around 43 lb/hour flow
>
> Well, lets see new ones at around $235 each x 4 = $940 plus tax/shipping
vs the ones purchased used anywhere from $20-$50 each = $80 -$200. Which I
guess is the reason I keep purchasing used ones {:>)
>
> Ed Anderson
>
>
> ----- Original Message -----
> From: kenpowell@comcast.net
> To: Rotary motors in aircraft
> Sent: Thursday, December 09, 2004 4:42 PM
> Subject: [FlyRotary] fuel injector mounting
>
>
> Look in the archives for an earlier post where I listed the
measurements of both ends of the Mazda injectors and the Ford injectors -
they are not the same. Ken P.
>
> -------------- Original message --------------
>
> OK, we have had this conversation before and I'm really not sure
what I'm going to do but...... I picked up my latest 5.0 Mustang magazine
and started looking for NEW injectors. Let's see, 42 lb set of 8 for $289
from www.buyfordracing.com (good company, I've bought from them several
times); Ford Motorsports 42lb set for $359 from www.houstonperformance.com;
Steeda 42 lb(probably Bosch) for $309 from www.gtrhipo.com. I usually see
38 lb injectors but not with the quick look that I just completed. The
Mustang aftermarket is a great source of injectors, fuel pumps, fuel
regulators, etc. After reading of all the problems with the old Mazda
injectors I'm again wondering if we wouldn't just be better off to buy new
ones. Go to the RC Engineering website to determine the best size for your
HP output (looks like 38
> Ken Powell
>
>
> ------------ Original message --------------
> I understand. That is a lot of the problems we all face with
these electro mechanical monsters of late design. You can spend more than
car is worth keeping minor engine details working properly. Of course, it is
still much better than the certificted aircraft world. Remember, this is a
word of art marketing world we are talking about here; rebuilt normally
means disassmbled by hand, inspected by a technician, reassemled by hand
using new parts to replace worn / faulty parts; reconditioned normally means
simply cleaned and inspected, meeting original specs and refurbished means
cleaned, tested, repaired, if necessary, and re-packaged, usually to as
nearly as new a state as possible.
> ----- Original Message -----
> From: Ed Anderson
> To: Rotary motors in aircraft
> Sent: Thursday, December 09, 2004 3:26 PM
> Subject: [FlyRotary] Re: Fuel Leaks
>
>
> No disparagement of remanufacture parts implied, Jesse, I have
used many remanufactured parts and still do. However, I have had at least 3
injectors which have stuck open or leaked in the 250 hours of flying. These
were cleaned and "refurbished" (not certain exactly what that means). Would
new parts have done any better - don't really know but would have hoped so.
>
> However, infant mortality rate of new parts is certainly a
factor as well. Used injectors are probably better than new injectors -
however, after a certain point I am certain that the reliability curve
starts down again.
>
> A number of folks on the list have had injector problems at one
time or the other. I just think that 10-15 year old injectors are getting a
bit long in the tooth considering the environment they operate in.
>
> Here we do have a choice in that new injectors are available -
just rather expensive. Four new injectors and I have the $$ I spent to
rebuild the engine in the first place.
>
> Ed Anderson
>
>
> ----- Original Message -----
> From: jesse farr
> To: Rotary motors in aircraft
> Sent: Thursday, December 09, 2004 3:10 PM
> Subject: [FlyRotary] Re: Fuel Leaks
>
>
> Since I, at one time, owned a parts rebuilding business, I
gather you are suggesting that on certain type parts of certain age that
washed parts are probably not worth the risk of going with less than new ?
That's really all you can do with somethings. Of course, with others, you
can not only re-build and/or replace worn parts but you can even improve on
them. On others, cleaning and checking them is about all can be done.
> jofarr, soddy tn
> ----- Original Message ----- From: Ed Anderson
>
> These are refurbished injectors supposedly cleaned and flow
tested - but, unless you buy new Mazda injectors at $235, you are getting
remanufactured injectors which are getting to be almost 15 years old in some
cases.
>
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html
|
|