986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

Gelbster · 12-17-2014, 07:30 AM

As far as pintle vs 4 hole differences are concerned: there are demos of the various types under the same pressure to show the spray pattern. The pintle and older types tend to have a narrow jet of fuel.The 4 hole ,like Bosch Gen 3 have an atomised cone shape.
The experts say the narrow jet is O.K. for turbo/s/c,racing. Four hole is best for our application and that is why the later cars use them.
"This Bosch injector replaces obsolete p/n 0290150455.
Bosch Part number: 0280155890
Flow specs: 22.7 LBS/HR at 3 BAR (172.4 g/min)
Fuel Nozzle: Modern 4-hole disc fuel atomizer
Spray Type: Narrow cone, maximum fuel atomization
Injector type: Saturated
Connector type: Jetronic
O-rings: Viton, 14.5 mm
Length: 74 mm
Coil resistance: 12.0 Ohms"
here is an easy read:
https://www.youtube.com/watch?v=7oTirEZNRw8
https://www.youtube.com/watch?v=Emnax2J4FX4
**
These may have been superseded by a 15.4 ohm update with # 0280 156 211 -but check first because these are rated at only 300 Kpa ,not 400 like the 0280 155 890 That is 43 vs 58 psi. The spray pattern is slightly improved from15 to 20 degrees - if that makes a difference to the M96?

12-17-2014, 07:30 AM	#9
Gelbster Registered User Join Date: May 2014 Location: S.California Posts: 2,027	As far as pintle vs 4 hole differences are concerned: there are demos of the various types under the same pressure to show the spray pattern. The pintle and older types tend to have a narrow jet of fuel.The 4 hole ,like Bosch Gen 3 have an atomised cone shape. The experts say the narrow jet is O.K. for turbo/s/c,racing. Four hole is best for our application and that is why the later cars use them. "This Bosch injector replaces obsolete p/n 0290150455. Bosch Part number: 0280155890 Flow specs: 22.7 LBS/HR at 3 BAR (172.4 g/min) Fuel Nozzle: Modern 4-hole disc fuel atomizer Spray Type: Narrow cone, maximum fuel atomization Injector type: Saturated Connector type: Jetronic O-rings: Viton, 14.5 mm Length: 74 mm Coil resistance: 12.0 Ohms" here is an easy read: https://www.youtube.com/watch?v=7oTirEZNRw8 https://www.youtube.com/watch?v=Emnax2J4FX4 These may have been superseded by a 15.4 ohm update with # 0280 156 211** -but check first because these are rated at only 300 Kpa ,not 400 like the 0280 155 890 That is 43 vs 58 psi. The spray pattern is slightly improved from15 to 20 degrees - if that makes a difference to the M96? Last edited by Gelbster; 10-04-2017 at 07:57 PM.