Technical > Spud Miller's Cave

Blower / fuel at idle

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Spud Miller:

--- Quote from: 32bantam on January 17, 2016, 09:26:29 AM ---Thanks...at least now I know what is going on.
I want to clarify....hat nozzles larger in the front?
Can I run the front four hat nozzles off the port block? The ports are set for 15 lbs. If not what do the ball check nozzle bodies look like? Do you sell them?
Thanks again...now I can sleep at night !!!!
Steve

--- End quote ---

Hat nozzles small in the front, port nozzles big in the front.

If you could plumb the front hat nozzles to the port distribution block that would work great. Ball checks are easier. The nozzle bodies look exactly the same from the outside, except for no hole. They'd replace your existing bodies. Tiny shims, spring, ball and ball cup go inside and your nozzle screws into it to hold it all in place. We do stock them.

 Spud

dreracecar:
If the blower winds everything to the front, why would nozzle placement matter in the hat? wouldnt nozzle size just mean fuel volume and cooling?

wideopen231:
I use to run dual port nozzles with specail BV just for this reason.One set where on at idle and second set only at full throttle.Worked great.Now my system was setup for 14-71 at 56% od and was high helix with delta hole. Also worked with the whipple just reveresed and flipped the nozzle layout.

Spud Miller:

--- Quote from: wideopen231 on January 19, 2016, 10:09:41 AM ---I use to run dual port nozzles with specail BV just for this reason.One set where on at idle and second set only at full throttle.Worked great.

--- End quote ---

Yup, more hardware involved and getting two port nozzle holes per cylinder in some manifolds is almost impossible. But works great! Commonly called "Dribblers".

Spud

Spud Miller:

--- Quote from: dreracecar on January 18, 2016, 08:08:15 AM ---If the blower winds everything to the front, why would nozzle placement matter in the hat? wouldnt nozzle size just mean fuel volume and cooling?

--- End quote ---

Well, of course not EVERYTHING goes clear to the very front. Forward is the trend though. Even with a delta or delta-retro opening, putting more fuel in the back of the hat favors the rear of the triangular exit and makes it to the rear cylinders. Blower setback helps a bunch too.

Spud

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