jester1

iTrader: (1)

using dual fuel solonoids. Im using a NOS pro race fogger system a holley reg that splits into two -6 fuel lines to the noids. How would you properly set the flowing fuel pressure with the dual lines?
According to holleys site, it states this for figuring jet size.
fuel jet x fuel jet X #of jets and the take the squre root. When I do this the numbers are obviously not round. Now do I round up, down concidering that even the rounded number does not correspond to an available jet size.
Whats the norm for this?

Robert56

iTrader: (2)

Can you post the math and what you came up with?
Robert

jester1

iTrader: (1)

Hi
#20 jet 56.568 orfice 125hp
#24 jet 67.882 orfice 175hp
#28 jet 79.195 orfice 250hp
#32 jet 90.509 orfice 300hp
#36 jet 101.82 orfice 350hp
#40 jet 113.137 orfice 400hp
#42 jet 118.79 orfice 450hp
Holley tech was not much help at all other than telling me not to round up or down. I also asked him how to test the flowing fuel pressure but he didnt answer, yes I called a couple of times and was the same answer.
Since I have to fuel lines going to the noids do I run two jets one for each side or on into a single fuel line?

Thanks Robert

Robert56

iTrader: (2)

Here's the math I allways use for determaning dual jet sizes.
single jet size x .71 = dual nozzle jet sizes

or

(.71 x size of one dual jet) x 2 = single nozzle jet size

So, the surface area of 2 .046 jets equal a .065 single jet.
Remember this is not laid in stone, but rather a starting point, and a/f needs to be checked, as I know you know. But if you know the single jet size for your working fuel pressure this will get you close.

As for flowing pressure, one of these will work:
Nitrous Direct Fuel Flowing tools
Robert

jester1

iTrader: (1)

This may be a stupid question but does the jet(s) size stamped on the jet itself correspond to the actual orfice size?
If not what do you use to cross ref.
This should have been information contained in the instructions! The instruction do not even mention how and where etc etc to adjust for fuel press.
eg. this is what i did
( 24 x 24 x 8 ) and take square root which comes out to 67.882 orfice for one jet.
Is this correct?
thanks

Robert56

iTrader: (2)

No that's not right .67/.68 fuel jet is a single size for about a 300shot. Yes, the stamped number is the orifice size. I am sure dave or ricky will have the correct math or no how to use this math Monday if they see this thread. Flowing pressure is after the noids. Get the How to use and install Nitorus oxide by Joe Pettitt for all the tuning you could ever need, it's a NOS based book. Can get it on line. I would look it all up for ya, but I am getting ready for bed.
Robert

jester1

iTrader: (1)

Thanks
I actually went through that book and I have the old version. The old one for sure doesnt state anything about fuel pressure tunning. I searched the new book but may have missed it?? but not sure. I ordered it from the lib. for tuesday.
Im suprised no one else tunned in. Im I the only one with a DP wet system?