Joined
·
1,449 Posts
I've ran the NOS "B" nozzles for several years and have never had issues. I was aware that numerous people had experienced problems with the "B" nozzle design, but had never personally experienced any problems until this past weekend.
A friend of mine purchased a second hand NOS fogger from a guy. The kit appeared to have been used very little, everything was clean, not even any scratches on the flare nuts. The Nozzles are "B" nozzles and appeared to be in perfect condition.
He installed the system a couple of weeks ago and brought it by my shop to complete wiring of the digiset, etc. We decided to give the system a try yesterday in the shop, first "dry firing" the system to make certain that the digiset was operating correctly, etc. Checked flowing fuel pressure, retards, etc., everything checked out o.k.. Ready for a test with the "bang" button, we warmed the motor up, brought her up to about 2800 and tapped the button. The engine popped out of the carburetor and died. Thinking that we hadn't purged the system well enough, we checked bottle pressure, purged the system well and hit it, same deal, dead.
We completely ran through the system, retards, rotor phasing, fuel pressure, etc. Everything checked out. We removed the system from the engine and "wet fired" it into catch cans, plenty of fuel, plenty of nitrous. Re-installed the system, re-checked everything, tried it again, same shit!!
After scratching my head for a few minutes, I remembered the article that I had read a year or so ago about the problem nozzles. I connected my flow guage, armed the system and tapped the "bang" button. The fuel pressure guage PEGGED!! I called Steve Johnson (sorry to interrupt the cookout Steve, thanks) and Steve confirmed that it sounded like a nozzle problem. We pulled all of the nozzles and performed the "brake cleaner straw test" and ALL 8 nozzles allowed the brake cleaner to flow back up into the fuel inlet side of the nozzle. We also used compressed air to test the nozzles with the same result.
I'm attaching a link to the article if anyone is interested.
http://texastuffstreet.com/fogger.htm
Does anyone know if NOS/HOLLEY will warranty these nozzles? They're probably a couple of years old and were purchased second hand but I thought that they may still honor the nozzles since it appears to be a not so uncommon problem.
Steve, we'll be calling you for a set of your nozzles soon.
Martin
A friend of mine purchased a second hand NOS fogger from a guy. The kit appeared to have been used very little, everything was clean, not even any scratches on the flare nuts. The Nozzles are "B" nozzles and appeared to be in perfect condition.
He installed the system a couple of weeks ago and brought it by my shop to complete wiring of the digiset, etc. We decided to give the system a try yesterday in the shop, first "dry firing" the system to make certain that the digiset was operating correctly, etc. Checked flowing fuel pressure, retards, etc., everything checked out o.k.. Ready for a test with the "bang" button, we warmed the motor up, brought her up to about 2800 and tapped the button. The engine popped out of the carburetor and died. Thinking that we hadn't purged the system well enough, we checked bottle pressure, purged the system well and hit it, same deal, dead.
We completely ran through the system, retards, rotor phasing, fuel pressure, etc. Everything checked out. We removed the system from the engine and "wet fired" it into catch cans, plenty of fuel, plenty of nitrous. Re-installed the system, re-checked everything, tried it again, same shit!!
After scratching my head for a few minutes, I remembered the article that I had read a year or so ago about the problem nozzles. I connected my flow guage, armed the system and tapped the "bang" button. The fuel pressure guage PEGGED!! I called Steve Johnson (sorry to interrupt the cookout Steve, thanks) and Steve confirmed that it sounded like a nozzle problem. We pulled all of the nozzles and performed the "brake cleaner straw test" and ALL 8 nozzles allowed the brake cleaner to flow back up into the fuel inlet side of the nozzle. We also used compressed air to test the nozzles with the same result.
I'm attaching a link to the article if anyone is interested.
http://texastuffstreet.com/fogger.htm
Does anyone know if NOS/HOLLEY will warranty these nozzles? They're probably a couple of years old and were purchased second hand but I thought that they may still honor the nozzles since it appears to be a not so uncommon problem.
Steve, we'll be calling you for a set of your nozzles soon.
Martin