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03-05-2012
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#1 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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IHs with 2ndry shorty injectors: More flow?
I had talked to a few people about 2ndry injector bosses......they mentioned that removed nearly the entire boss....on my siamese set I did the same and wow....plenty of meat for the injector.
So the next set I port....I leap before I look and do the same....and learned a hard lesson...however with error comes opportunity. There are shorty injectors out there and I have some on the way. So that means more flow in the secondary injector runner.....we will see if it means any more HP.
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-05-2012
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#2 |
 
Join Date: Apr 2007
Location: Northern VA
Posts: 2,646
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Re: IHs with 2ndry shorty injectors: More flow?
Lee,
Clue us in, which injector did you get?
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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03-05-2012
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#3 |
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Join Date: Feb 2008
Location: Vancouver, BC
Posts: 251
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Re: IHs with 2ndry shorty injectors: More flow?
I believe there is also some room to simply shim-up the fuel rail mounting - as opposed to a "shorty injector" - similarly allowing you be more aggressive in porting the secondary
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03-05-2012
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#4 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: IHs with 2ndry shorty injectors: More flow?
They are custom LGAFF motorsports specials....
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-05-2012
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#5 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: IHs with 2ndry shorty injectors: More flow?
Let me check them out first and then I will post it up
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-08-2012
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#6 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: IHs with 2ndry shorty injectors: More flow?
 
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-08-2012
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#7 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: IHs with 2ndry shorty injectors: More flow?
I can take down the lead up to the boss opening even more to smooth things out
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-08-2012
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#8 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,683
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Re: IHs with 2ndry shorty injectors: More flow?
I wonder if what you are not considering is the positioning of the injector nozzle relative to the valve head and aim of fuel stream into air flow. With the "shorty" injector, does fuel end up on wall of runner due fan pattern of spray? Some of what I have read suggests that fuel is aimed at valve head using the heat there to help atomize and vaporize fuel.
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03-08-2012
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#9 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: IHs with 2ndry shorty injectors: More flow?
Actually most reviews I have read indicate better atomization with more travel.....the center of the inj does not change, so no it would not wash
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-08-2012
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#10 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: IHs with 2ndry shorty injectors: More flow?
This are not the first time these were used
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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Linear Mode
