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I copied the below service bulletin from TY, on phazer jetting. I have a 97 phazer that's got all stock jetting with an Aaen pipe.. Im worried about the infamous lean midrange - especially when piped.. Has anyone tried these different nozzles and did it richen things up with the pipe? If this isn't the fix what is? Which configuration is recommended?
I bought the machine used last year with the pipe on it already.. I've been running AV/Prem mix or C12/Prem mix just to be safe..
Many thanks! Hopefully the pictures attach.
Service bulletin 1996 . Basically you can change the primary and main nozzles for a richer mixture. The primary nozzle part #80L-14489-00-00 has two .9mm holes as opposed to the stock nozzle's one 1.0mm hole.
There are at least 3 different main nozzles
Part #8Y2-14941-3A-00 is STD. has an OD of 6.5mm, ID of2.2mm and 12 0.7mm air bleed holes.
Part # 8Y2-14941-1A-00 has an OD of 5.5mm, ID of 2.2mm and 10 0.7mm air bleed holes.
Part # 8Y2-14941-2A-00 has an OD of 5.5mm, ID of 2.4mm and 10 0.8mm air bleed holes.
A smaller OD will richen the mixture at snap throttle and lean it at mid to WOT during steady throttle.
A larger ID will richen the mixture at mid to WOT conditions
Fewer and larger air bleed holes will richen the mixture at mid to WOT conditions.
You can use any combination of the listed nozzles for a wide range of mixtures, depending if you want to richen the mixture during snap or steady throttle conditions.
Full rich, at steady mid to WOT would be using the 80L primary and 2A main nozzle. Leanest would be STD primary and the 1A main nozzles.
For quick snap throttle conditions, richest would be 80L primary and 2A main nozzles. leanest would be STD primary and STD 3A main nozzles.
There is a chart that lists the calibration options from lean to rich in the service bulletin. Also the hole in the STD primary nozzle must face towards the air box.
Mtnviper
I bought the machine used last year with the pipe on it already.. I've been running AV/Prem mix or C12/Prem mix just to be safe..
Many thanks! Hopefully the pictures attach.
Service bulletin 1996 . Basically you can change the primary and main nozzles for a richer mixture. The primary nozzle part #80L-14489-00-00 has two .9mm holes as opposed to the stock nozzle's one 1.0mm hole.
There are at least 3 different main nozzles
Part #8Y2-14941-3A-00 is STD. has an OD of 6.5mm, ID of2.2mm and 12 0.7mm air bleed holes.
Part # 8Y2-14941-1A-00 has an OD of 5.5mm, ID of 2.2mm and 10 0.7mm air bleed holes.
Part # 8Y2-14941-2A-00 has an OD of 5.5mm, ID of 2.4mm and 10 0.8mm air bleed holes.
A smaller OD will richen the mixture at snap throttle and lean it at mid to WOT during steady throttle.
A larger ID will richen the mixture at mid to WOT conditions
Fewer and larger air bleed holes will richen the mixture at mid to WOT conditions.
You can use any combination of the listed nozzles for a wide range of mixtures, depending if you want to richen the mixture during snap or steady throttle conditions.
Full rich, at steady mid to WOT would be using the 80L primary and 2A main nozzle. Leanest would be STD primary and the 1A main nozzles.
For quick snap throttle conditions, richest would be 80L primary and 2A main nozzles. leanest would be STD primary and STD 3A main nozzles.
There is a chart that lists the calibration options from lean to rich in the service bulletin. Also the hole in the STD primary nozzle must face towards the air box.
Mtnviper