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Dutch924-racer
Joined: 23 Jul 2007
Posts: 1077
Location: The Netherlands
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 Posted: Tue Dec 27, 2016 3:28 am Post subject: equalize each injector fuel delivery |
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I have new injectors in my 931, but they give different amount of fuel.
I changed them but the poblems stays. So I guess the problem is in my metering head.
Had anybody equalized injector fuel delivery on the metering head ?
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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller |
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morghen
Joined: 21 Jan 2005
Posts: 8879
Location: Romania
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| Posted: Tue Dec 27, 2016 3:57 am Post subject: |
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Probably the filters are clogged, you dont do anything else than use the rebuild kit.
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Johann
Joined: 07 Aug 2016
Posts: 240
Location: Netherlands
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| Posted: Tue Dec 27, 2016 4:40 am Post subject: |
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I have hadd this in my ebay list for a couple of months.
But I have been unable to find a rebuild guide that I am happy with. My biggest worry is that once you take the fuel distributor appart you will change the sysyem pressure? |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2596
Location: MI
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Dutch924-racer
Joined: 23 Jul 2007
Posts: 1077
Location: The Netherlands
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| Posted: Tue Dec 27, 2016 5:30 pm Post subject: |
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thanks eddie, that are the adusting screws I mean:
anybody got expierience with that on a 931 ?
 4
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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2596
Location: MI
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| Posted: Wed Dec 28, 2016 4:35 am Post subject: |
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| Johann wrote: | I have hadd this in my ebay list for a couple of months.
But I have been unable to find a rebuild guide that I am happy with. My biggest worry is that once you take the fuel distributor appart you will change the sysyem pressure? |
http://www.ferrari400parts.com/kjetdownload.php
click on: rebuilding k jet adjustable alloy fd's
May have to save as .pdf or change the file to .pdf in properties..
Lot of other great CIS resources at that site also..
System pressure is very easy to adjust..
I have not personally tore into a FD yet to rebuild, or attempted to adjust injector balancing..
This guide also touches on those adjustment screws..
Interesting pic I found..
Looks like they are putting syringes on the injector ports as a way of testing flow balance, hmm...
It seems to me that cis information came to be before the information age so it wasn't naturally put on the internets.. And that the few who continue the trade of cis specialty work somewhat guard their secrets..
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80 Turbo - Slightly Modified |
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924RACR
Joined: 29 Jul 2001
Posts: 8803
Location: Royal Oak, MI, USA
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| Posted: Wed Dec 28, 2016 5:51 am Post subject: |
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Yeah, maybe the way to balance flow, set for equal at full-strength... may also be able to influence the overall amount of output available, by raising the ultimate max pressure?
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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morghen
Joined: 21 Jan 2005
Posts: 8879
Location: Romania
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| Posted: Wed Dec 28, 2016 8:22 am Post subject: |
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Does the 924 engine really use all that flow that any difference between the dizzy ports brings an imbalance in the fuel delivery?
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