Technical > Spud Miller's Cave

scott super slot injector

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DeSoto:
 Another thing I should have mentioned is the 8 nozzle ports have been moved to below the plates like a hilborn and the original Scott above plates plugged. If I had to guess I would say the nozzles
are homemade by pressing a short piece of aluminum rod into a brass fitting. A hacksaw cut half way through and drilled from the inside of fitting to the cut made with the saw. They look to be drilled about .040 without measuring them.
 All the nozzles are fed by rubber hilborn style lines and come out of a added metering or possibly just a plain fuel block. This block is fed by a little larger rubber line that is attached to the scott block that is cast into the main throttle plate casting.

dreracecar:
They work fine for Cackleing.  Really need to locate the pump, the whole system revolves around it. The pumps were refered as "washing machine" type as it was just a crank driven impeller and did not rely much on pressure as it did volume of fuel. The blades dont need to be perfect or seal  as some amount of air is needed to get into the engine to idle. 1,000's of injectors have been/still do made without bushings/bearings around the throttle shafts, and in fact when exsesive play becomes a problem , its the steel shaft that is usually worn down and not the alu.
If you go to www.cacklefest.com and in the parts for sale section --Bill Turney has some Scott pieces(includeing pumps) for sale. Also (its hard to read and you have to enlarge it) is the instruction sheet and the explination of how the whole thing is designed to work.

DeSoto:
Dreracecar, I had a look at Bill T.  Scott  collection on the site you posted.
I gathered that Scott has made at least 3 different sized injectors of this design.
The two he has pictured have considerably smaller throttle plates and have a rounded
shape to them. The model I have is rectangular and the full length of a 671 opening. Appears to
be a way to make them as large as they could with the blower case top opening size.
 My guess would be a newer model. Mine also has M/T cast into it. So mine must have
been sold through Mickey Thompson. Guess?
 I did see the pumps he has pictured. I couldn't make out the instruction sheet. I think I will
try and contact him to see if he has anything spare laying around that would work to get mine
back to original. If not I will have to try it out in its currently converted to hilborn style.
 Thanks for the input.

dreracecar:
Scott did private label the injection to M/T.  Air going thru the injector (at our level) does not know or care about the shape of the throttle blades, but in order to convert to a Hilborn/Enderle type injection, a change in the BV is nessasary because they opperate at different pressure and volume. The newer pumps work as positive displacement and require checks to return excess fuel wheras the Scott works by cavitation once the fuel requirement is met or restricted. All that is needed for the Scott is just the one feed line. I prefer the Enderle BV but for your needs the Hilborn BV is more to the Scott shape and size to fit better.

DeSoto:
Thanks for that info, is the barrel valve pictured a hilborn part or? Hope someone here might be able
to I'd it.  I looked it over and found no #s or markings to track. I would guess someone did have it all
working at somepoint 30 or more years ago as it was all assembled when I got it. I didn't get a pump with the setup. But I have one that may be able to be used.

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