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Changing injectors from 8* to 25*...do I need a new dyno tune?

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Old May 15, 2007 | 03:06 PM
  #11  
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petemac
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Default RE: Changing injectors from 8* to 25*...do I need a new dyno tune?

Thanks, this is good info to have.


ORIGINAL: 85FXWG

More fuel with the 25's.......= running rich
[align=left]If the part numbers on the fuel injectors are rubbed off or otherwise[/align][align=left]unreadable, count the number of orifices or holes in[/align][align=left]the injector nozzle.[/align][align=left]The 8° angle cone spray fuel injector has[/align][align=left]just three holes, while the 25° has six. [/align][align=left][/align][align=left]See NOZZLE END in[/align][align=left]Figure 1.[/align][align=left]4. Update the ECM calibration. For those motorcycles[/align][align=left]equipped with P&A Screamin’ Eagle 1450cc or 1550cc[/align][align=left]Performance Kits, refer to h-dnet.com for the correct calibration[/align]
http://mysite.wanadoo-members.co.uk/hhlair1/M1185.pdf
ORIGINAL: DoCPooF

????

Why would you have to redo a dyno with a change in injectors?


The stock ones where 8 degree spray patter, the 25 is obviously a 25 degree spray pattern - which helps with better ignition and less sputtering on take off.

I find it hard to believe this would call for a remap and dyno.

JMO.

And yea, those were a service bulletin and you sould not have to pay a dime to have them changed.


 
Old May 15, 2007 | 03:12 PM
  #12  
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85FXWG
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From: Florida
Default RE: Changing injectors from 8* to 25*...do I need a new dyno tune?

Print out the PDF reacall notice and take it with you to the dealer just in case they try backing out........If you ask shovelheadbob what needs to be done, he will give you the correct steps....He knows his stuff!

ORIGINAL: petemac

Thanks, this is good info to have.


ORIGINAL: 85FXWG

More fuel with the 25's.......= running rich
[align=left]If the part numbers on the fuel injectors are rubbed off or otherwise[/align][align=left]unreadable, count the number of orifices or holes in[/align][align=left]the injector nozzle.[/align][align=left]The 8° angle cone spray fuel injector has[/align][align=left]just three holes, while the 25° has six. [/align][align=left][/align][align=left]See NOZZLE END in[/align][align=left]Figure 1.[/align][align=left]4. Update the ECM calibration. For those motorcycles[/align][align=left]equipped with P&A Screamin’ Eagle 1450cc or 1550cc[/align][align=left]Performance Kits, refer to h-dnet.com for the correct calibration[/align]
http://mysite.wanadoo-members.co.uk/hhlair1/M1185.pdf
ORIGINAL: DoCPooF

????

Why would you have to redo a dyno with a change in injectors?


The stock ones where 8 degree spray patter, the 25 is obviously a 25 degree spray pattern - which helps with better ignition and less sputtering on take off.

I find it hard to believe this would call for a remap and dyno.

JMO.

And yea, those were a service bulletin and you sould not have to pay a dime to have them changed.


 
Old May 15, 2007 | 03:20 PM
  #13  
petemac's Avatar
petemac
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Ultimate HDF Member
Joined: Jul 2006
Posts: 9,335
Likes: 13
From: MA
Default RE: Changing injectors from 8* to 25*...do I need a new dyno tune?

Yep, I already have this printed out. Good tip on contacting shovelheadbob. Thanks.


ORIGINAL: 85FXWG

Print out the PDF reacall notice and take it with you to the dealer just in case they try backing out........If you ask shovelheadbob what needs to be done, he will give you the correct steps....He knows his stuff!

ORIGINAL: petemac

Thanks, this is good info to have.


ORIGINAL: 85FXWG

More fuel with the 25's.......= running rich
[align=left]If the part numbers on the fuel injectors are rubbed off or otherwise[/align][align=left]unreadable, count the number of orifices or holes in[/align][align=left]the injector nozzle.[/align][align=left]The 8° angle cone spray fuel injector has[/align][align=left]just three holes, while the 25° has six. [/align][align=left][/align][align=left]See NOZZLE END in[/align][align=left]Figure 1.[/align][align=left]4. Update the ECM calibration. For those motorcycles[/align][align=left]equipped with P&A Screamin’ Eagle 1450cc or 1550cc[/align][align=left]Performance Kits, refer to h-dnet.com for the correct calibration[/align]
http://mysite.wanadoo-members.co.uk/hhlair1/M1185.pdf
ORIGINAL: DoCPooF

????

Why would you have to redo a dyno with a change in injectors?


The stock ones where 8 degree spray patter, the 25 is obviously a 25 degree spray pattern - which helps with better ignition and less sputtering on take off.

I find it hard to believe this would call for a remap and dyno.

JMO.

And yea, those were a service bulletin and you sould not have to pay a dime to have them changed.


 
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