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02-24-2010, 11:17 PM
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#1
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Name: roachie
Title: Taco Master
Status: Not Here
Join Date: Nov 2007
Location: East TN
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Posts: 11,133
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Injector return
Why is it necessary?
Seen some comp engines with and without it.
Just wondering.
__________________
99 F250____sold (to a ninja)
01 F250____Mexican F150
04 F350____Fat boy
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02-25-2010, 10:29 AM
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#2
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Name: roachie
Title: Taco Master
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Join Date: Nov 2007
Location: East TN
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I'm not even sure how the injector return functions.
__________________
99 F250____sold (to a ninja)
01 F250____Mexican F150
04 F350____Fat boy
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02-25-2010, 10:34 AM
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#3
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Name: LReiff
Title: The Antistock
Status: Not Here
Join Date: Apr 2009
Location: Newburg, PA
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Posts: 9,201
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It's a bleed off for fuel that leaks past the plunger, if it's plugged pressure will build in the injector body and the injector will no longer function properly.
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Lee
Quote:
Originally Posted by 4x4dually
If anyone thinks the internet is serious they should seriously log off and burn their laptop.
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02-25-2010, 11:02 AM
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#4
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Name: roachie
Title: Taco Master
Status: Not Here
Join Date: Nov 2007
Location: East TN
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Posts: 11,133
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Little off topic, what fitting on the injector return?
I have forgotten what it is, let alone the thread sizing.
__________________
99 F250____sold (to a ninja)
01 F250____Mexican F150
04 F350____Fat boy
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02-25-2010, 11:23 AM
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#5
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Name: 12valveAnderson
Title: Green Behind the Ears
Status: Not Here
Join Date: Jun 2009
Location: PA
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Posts: 65
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Are you talking about the check valve bango fitting in the back of the cylinder head.
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02-25-2010, 11:25 AM
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#6
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Name: roachie
Title: Taco Master
Status: Not Here
Join Date: Nov 2007
Location: East TN
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Posts: 11,133
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No, talking the line on a 12v.
Guess I should have mentioned that.
__________________
99 F250____sold (to a ninja)
01 F250____Mexican F150
04 F350____Fat boy
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02-25-2010, 11:30 AM
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#7
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Name: 12valveAnderson
Title: Green Behind the Ears
Status: Not Here
Join Date: Jun 2009
Location: PA
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Posts: 65
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Oh was thinking for some reason you were talking about commonrail cm850.
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02-25-2010, 11:30 AM
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#8
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Name: Smokem
Title: Turbler
Status: Not Here
Join Date: May 2006
Location: Iowa
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Posts: 5,565
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Keep it.
The fuel bypassed by the needle guide is pushed upward through the spring, shim, and then into the return passage. If you delete the return, the trapped pressure will fight against the incoming pressure as it tries to lift the pintle.
Last edited by Smokem; 02-25-2010 at 11:48 AM.
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02-25-2010, 04:20 PM
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#9
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Name: roachie
Title: Taco Master
Status: Not Here
Join Date: Nov 2007
Location: East TN
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Posts: 11,133
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Sounds simple enough. Stock lines are low grade SS arent they?
__________________
99 F250____sold (to a ninja)
01 F250____Mexican F150
04 F350____Fat boy
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02-25-2010, 05:07 PM
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#10
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Name: Signature600
Title: THA MAN!
Status: Not Here
Join Date: Aug 2006
Location: Jeffersonville, Ohio
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Posts: 11,961
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I just used a compression fitting...others have just used a piece of hose and a hose clamp...there's not much pressure there
Chris
__________________
THANKS TO:
Tim Barber @ TRE Diesel
Jeff Mumau @ Mumau Diesel Service
Rip @ Source Automotive
Don Thuren @ ThurenFab Suspension
Columbus Diesel Supply
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02-25-2010, 05:17 PM
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#11
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Name: Signature600
Title: THA MAN!
Status: Not Here
Join Date: Aug 2006
Location: Jeffersonville, Ohio
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Posts: 11,961
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Quote:
Originally Posted by stock600
Who wants to chance any fuel leak on the track though or anywhere for that matter. A hose pushed over a slick piece of tubing and a clamp is a potitial problem later, easier to do it right once. AN fittings wont leak
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I agree...just saying...
Chris
__________________
THANKS TO:
Tim Barber @ TRE Diesel
Jeff Mumau @ Mumau Diesel Service
Rip @ Source Automotive
Don Thuren @ ThurenFab Suspension
Columbus Diesel Supply
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02-26-2010, 12:54 PM
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#12
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Name: Kronic_187
Title: Mekanical injection junky
Status: Not Here
Join Date: Sep 2009
Location: British Columbia, Canada
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Posts: 1,341
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__________________
96:CCLB/4x4:NV5600/3250DD, 178/208, 7mmDV's, 5x.016, 155*, 2095, 4GSK, H11, 61.5/68/.9-88/96/1.32, Hammy VS/Manton PR, Dual 3.5" Pusher, 1/2"Feed-3/8Return,6" longarm, Junkyard Freespin Kit
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02-28-2010, 05:25 AM
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#13
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Name: CREED1
Title: Throwed Off
Status: Not Here
Join Date: Jul 2007
Location: Cleveland, Tx
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Posts: 2,880
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Just call up the guys at airdog my airdog kit came with a adapter to t the injector return and the pump return together and a pushlock fitting back to the tank.
Anybody know what either of those returns run at psi wise?
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