My Morse taper gave out when drilling brass on my CC lathe. The drill
digs
into the brass and then the taper slips. It took me hours to drill a 2
inch hole in
the 3/4 thick aluminum bar shown keeping the taper chuck from rotating.
It holds when drilling aluminum or steel.
The reason for the brass interior part was because aluminum
would generate yellow snot when flowing methanol.
These injector holders are high precision. The adjustable 3 jaw
chuck on my CC lathe was under a 1/2 thou run out. This design would
not be possible with out that.
Basically it is built around 37 degree flare fitting AN-6 to 1/4 inch
pipe steel adapter from McMaster Carr. Under $3 each.
And 5/8 diameter brass rod insert. That had to be machined down
as the diameter tolerance was all over the lot.
In terms of hours of engineering, design and machining at $50 an hour
they are
worth well over $500 each :-)
The tiny drilled head SS 6-32 screws are also from MacMaster.
This was a precision operation as well as the hole depth for the
screws was limited to exactly .2 inches or one would have a
150 psi leak. There are only about 6 threads in the hole.
Once they are safety wired they just act as retaining pins.
The mechanic better go easy with the screw driver :-)
The .040 aluminum straps holding the whole works together are not shown.
They will be tig welded to the large intake tubes.
This 200 pound 2 rotor engine is generating 650 HP with only four
injectors. PAC in Oz used
eight for some strange reason. Maybe they have not heard about the
Bosch 2000 injectors :-) Maybe that was for a 4 rotor.
Paul Lamar
Paul,
How is the brass insert sealed to the steel AN-6 fitting
??........."O" ring ??......
Kelly Troyer
Coated with RTV and pressed in with a six ton press.
Paul Lamar
I made injector holders from an AN-4 part like that, but made of
stainless. Only one drill process.
Robert LeClercq
Got any pictures of the injector holders you made Robert?
What was the diameter of the injector where it plugged into the fuel rail?
Mine are 13 mm or 39/64th.
Here are some pictures of Robert's rotary powered mid engine kit sports
car.
The engine is so small it is buried under the accessories :-)
Also Robert, if you have any pictures of the car with the hood and trunk
cover
on I would like to add to my collection. I was so enamored of how you
did the
mid engine transmission that I forgot to take some pictures of the car
itself :-)
Paul Lamar
Merry Christmas
Don't know what happened with that msg from you. The portion regarding
my GTM Libra sports car disappeared from all msgs.
Tried to get some pix, but my cameras SD adapter quit even tho I can
see the thumbnails. The car is from UK; the next to last one sold and
only one in US. The front and rear clamshells are not fastened down, so
the fit is only a little better when fastened.
The injector holders were drilled out to fit stock Mazda primaries and
sealed with their O rings. The alum clamp is holding them in with 2
#10-32 screws into the manifold boss.
Robert LeClercq
Looks good Robert. Here are the best of what you set. The rest are a bit out
of focus.
With boost of 20 psi doable with that turbo and some water and alcohol
to keep the intake temperature down to less than 150 F this car would
be brutal with 550 to 600 HP :-) You ought to drag race it. It would blow
people's mind :-) It would have better traction off the line than all
the front engine cars including the Corvettes. We found a little 12 volt
100 psi water pump on ebay for $18. That is what we are using for water
injection on the TTC. I would mix it 50 50 with alcohol.
Those injectors already look like Bosch so the 2000 might fit.
The 2000 is capable of up to 320 pounds per hour (EACH !!!)
with 130 PSI. It will take a heavy duty electric (and expensive) fuel pump
which will draw over 20 amps from the battery. That is almost a half a
HP just for the fuel pump but all we are talking about is less
than 5 seconds in the quarter mile :-)
Paul Lamar ...Very Merry Christmas
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