kvnnets
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I thought this might be a helpful thread for everyone who might have lost a manual or did not receive one when they bought a mill second hand.
Factory Carb Settings
HSN = High Speed Needle
MSN = Mid Speed Needle
LSN = Low Speed Needle (Metering needle)
18TZ series engines
High Speed Needle: 2.5 turns out from fully closed
Metering Needle (low speed): flush with carb or ball link body
18CV series engines
High Speed Needle: 2.5 turns out from fully closed
Metering Needle (low speed): .5 turn in from flush with carb body
21XZ Series engines
High Speed Needle: Approximately 3 turns open from fully closed
Metering Needle: Rotate until slotted head is flush with carb body
21VG Series engines
High Speed Needle: 3 turns out from fully closed
Metering needle (low speed): flush with ball link body
21VZ Series
Depends on the model/version of the engine
21TM Series engines
High Speed Needle: 2-1/2 turns out from close.
Low Speed Needle: 1/2 turn in from flush with carb body.
28XZ engines
High Speed Needle: 3 turns out from fully closed
Low Speed Needle: Rotary: flush with carb body
Slide: flush then 1/2 turn in
30VG engines
High Speed Needle: 2 3/4 turns out from fully closed
Low Speed Needle: flush with ball link body, then 1.5 turns in
Novarossi .21 through Novarossi .28
High Speed Needle: 3.5 turns out from seated
Low Speed Needle: 5 turns out from seated
IDLE: 0.6mm
LRP Z.28 Spec 3
High Speed Needle: 3.75 Turns From Closed
Low Speed Needle: 3.75 Turns From Closed
IDLE: Gap between 0.5mm and 1.0mm open
LRPZR .32 Spec 2
Hi needle 5.50 turns open
Mid/Low needle 5.25 turns open
Idle .05 to 1 mm
Mach 427 (lst2 and muggy)
High Speed Needle: 4 turns out from bottom
Low Speed Needle: 2,5 turns out from bottom
IDLE: .5mm - 1mm
SH .28
High Speed Needle: 3 turns out
Low Speed Needle: 3 turns out
IDLE: 1mm open
Ofna .28
High Speed Needle: 2 1/2 to 3 out
Low Speed Needle: Out 2
Dynamite Platinum .28 (Mach)
High Speed Needle: 3.5 turns out (counterclockwise) from closed.
Low Speed Needle: 2 turns out (counterclockwise) from closed.
IDLE: 1mm gap
STS .21 and STS .30
High Speed Needle: 3 turns out from the end
Low Speed Needle: 4.5 turns out from the end
Idle: 0.5mm open
Force R36
High Speed Needle: 3.5 turns from seated
IDLE: 1mm
I have also read that the factory settings in the manual for both the Picco .21and .28 are way off.
He is a good starting point that most people have had success with.
Picco .21 and Picco .28
High Speed Needle: 7 1/2 - 7 3/4 turns out from seated
Low Speed Needle: 5 1/2 - 5 3/4 turns out from seated
IDLE: 0.5 mm
Losi 3.4
High Speed Needle (HSN): 2.75 out from closed
Low Speed Needle (LSN): 2.75 out from closed
Force .26
High Speed Needle: 3 - 3.5 out from closed
Low Speed Needle: Flush with ball end
IDLE: Set for 1/16th inch gap
Force .28
High Speed Needle: 3 - 3.5 out from closed
Low Speed Needle: Flush with ball end
IDLE: Set for 1/16th inch gap
Force .32
High Speed Needle: 3-3.5 out from closed
Low Speed Needle: Flush with ball end
Losi 454
High Speed Needle: 2.5 out from closed
Low Speed Needle: 2.5 out from closed
Losi 427
High Speed Needle: 2.5 out from closed
Low Speed Needle: 2.5 out from closed
Losi 350
High Speed Needle: 3 out from closed (counter clockwise)
Low Speed Needle: 4 out from closed (counter clockwise)
Nitro Star S-25
High Speed Needle (HSN): 4 1/2 Turns From Closed
Low Speed Needle (LSN): 3 Turns From Closed
Idle: About 2mm
F4.6
High Speed Needle: Flush with groove
Low Speed Needle: Flush with case
IDLE: 1 mm
K4.6
High Speed Needle: Flush with groove
Low Speed Needle: Flush with case
IDLE: 1 mm
K5.9
High Speed Needle: Flush with groove
Low Speed Needle: Flush with case
Idle: 1 mm
HPI also recommends not to adjust the mid range needle.
32RR-1
High Speed Needle: Flush with carb
Low Speed Needle: Flush with carb
28RR-1
High Speed Needle: Flush with carb
Low Speed Needle: Flush with carb
28 Spec-2
High Speed Needle: Flush with carb
Low Speed Needle: Flush with carb
TRX 2.5 & TRX 3.3
High Speed Needle: 4 turns out
Low Speed Needle: Flush with valve or 1.5-1.75 turns out
Idle: 0.70-1mm open.
I know there are engines that I missed so feel free to add factory nitro carb settings at will.
Nitro Carb Explained:
And if it has a mid speed needle it would be on the opposite side of the lsn, and the side of the aluminum housing... it's typically bad practice to adjust the MSN.
Factory Carb Settings
HSN = High Speed Needle
MSN = Mid Speed Needle
LSN = Low Speed Needle (Metering needle)
OS Engines Factory Settings
18TZ series engines
High Speed Needle: 2.5 turns out from fully closed
Metering Needle (low speed): flush with carb or ball link body
18CV series engines
High Speed Needle: 2.5 turns out from fully closed
Metering Needle (low speed): .5 turn in from flush with carb body
21XZ Series engines
High Speed Needle: Approximately 3 turns open from fully closed
Metering Needle: Rotate until slotted head is flush with carb body
21VG Series engines
High Speed Needle: 3 turns out from fully closed
Metering needle (low speed): flush with ball link body
21VZ Series
Depends on the model/version of the engine
21TM Series engines
High Speed Needle: 2-1/2 turns out from close.
Low Speed Needle: 1/2 turn in from flush with carb body.
28XZ engines
High Speed Needle: 3 turns out from fully closed
Low Speed Needle: Rotary: flush with carb body
Slide: flush then 1/2 turn in
30VG engines
High Speed Needle: 2 3/4 turns out from fully closed
Low Speed Needle: flush with ball link body, then 1.5 turns in
Novarossi .21 through Novarossi .28
High Speed Needle: 3.5 turns out from seated
Low Speed Needle: 5 turns out from seated
IDLE: 0.6mm
LRP Z.28 Spec 3
High Speed Needle: 3.75 Turns From Closed
Low Speed Needle: 3.75 Turns From Closed
IDLE: Gap between 0.5mm and 1.0mm open
LRPZR .32 Spec 2
Hi needle 5.50 turns open
Mid/Low needle 5.25 turns open
Idle .05 to 1 mm
Mach 427 (lst2 and muggy)
High Speed Needle: 4 turns out from bottom
Low Speed Needle: 2,5 turns out from bottom
IDLE: .5mm - 1mm
SH .28
High Speed Needle: 3 turns out
Low Speed Needle: 3 turns out
IDLE: 1mm open
Ofna/Hyper .21 engine Factory Settings
- Set the master needle IN until stops, then turn OUT 4.5 to 5 turns.
- Setting for the black low end needle is OUT 3.5 turns out from flush.
- Setting brass head mid range needle, should always be flush to the case
Ofna .28
High Speed Needle: 2 1/2 to 3 out
Low Speed Needle: Out 2
Dynamite Platinum .28 (Mach)
High Speed Needle: 3.5 turns out (counterclockwise) from closed.
Low Speed Needle: 2 turns out (counterclockwise) from closed.
IDLE: 1mm gap
STS .21 and STS .30
High Speed Needle: 3 turns out from the end
Low Speed Needle: 4.5 turns out from the end
Idle: 0.5mm open
Force R36
High Speed Needle: 3.5 turns from seated
IDLE: 1mm
I have also read that the factory settings in the manual for both the Picco .21and .28 are way off.
He is a good starting point that most people have had success with.
Picco .21 and Picco .28
High Speed Needle: 7 1/2 - 7 3/4 turns out from seated
Low Speed Needle: 5 1/2 - 5 3/4 turns out from seated
IDLE: 0.5 mm
Losi 3.4
High Speed Needle (HSN): 2.75 out from closed
Low Speed Needle (LSN): 2.75 out from closed
Force .26
High Speed Needle: 3 - 3.5 out from closed
Low Speed Needle: Flush with ball end
IDLE: Set for 1/16th inch gap
Force .28
High Speed Needle: 3 - 3.5 out from closed
Low Speed Needle: Flush with ball end
IDLE: Set for 1/16th inch gap
Force .32
High Speed Needle: 3-3.5 out from closed
Low Speed Needle: Flush with ball end
Losi 454
High Speed Needle: 2.5 out from closed
Low Speed Needle: 2.5 out from closed
Losi 427
High Speed Needle: 2.5 out from closed
Low Speed Needle: 2.5 out from closed
Losi 350
High Speed Needle: 3 out from closed (counter clockwise)
Low Speed Needle: 4 out from closed (counter clockwise)
HPI Nitro Engine Factory Settings
Nitro Star S-25
High Speed Needle (HSN): 4 1/2 Turns From Closed
Low Speed Needle (LSN): 3 Turns From Closed
Idle: About 2mm
F4.6
High Speed Needle: Flush with groove
Low Speed Needle: Flush with case
IDLE: 1 mm
K4.6
High Speed Needle: Flush with groove
Low Speed Needle: Flush with case
IDLE: 1 mm
K5.9
High Speed Needle: Flush with groove
Low Speed Needle: Flush with case
Idle: 1 mm
HPI also recommends not to adjust the mid range needle.
AXIAL Factory Settings
32RR-1
High Speed Needle: Flush with carb
Low Speed Needle: Flush with carb
28RR-1
High Speed Needle: Flush with carb
Low Speed Needle: Flush with carb
28 Spec-2
High Speed Needle: Flush with carb
Low Speed Needle: Flush with carb
Traxxas TRX Factory Settings
- For The Traxxas lovers out thereTRX 2.5 & TRX 3.3
High Speed Needle: 4 turns out
Low Speed Needle: Flush with valve or 1.5-1.75 turns out
Idle: 0.70-1mm open.
I know there are engines that I missed so feel free to add factory nitro carb settings at will.
Nitro Carb Explained:
And if it has a mid speed needle it would be on the opposite side of the lsn, and the side of the aluminum housing... it's typically bad practice to adjust the MSN.