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tyfighter123 · Joined: 19 Jan 2010 Posts: 551 Location: Colorado

Does anyone know the lb/rating of the n/a injectors? Also does anyone know of a higher rated injector that works with the stock CIS fitting?
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Porsche 924 1977 N/A
Mustang GT/CS 2007
Porsche 924S 1987 (parts car)(cut up and recycled)
Porsche 911S 1976
Porsche 931 1980
Porsche 931 1980 (parts car)

gegge · Joined: 27 Jul 2007 Posts: 1124 Location: Sweden

It is the FD that provides the flow, the injectors just atomize the fuel. Hence, any would do the trick. I am installing M-B "047" in brass, used in Ferrari as well and half price compared to OEM.

Get back to asap with a report.

EDIT: No issues at all. Way better with new injectors. Smooth and flexible compared with old ones. Major improvement. Plug-n-play

CO was 1% on highway and 6% at WOT which equals 14.0 and 12.2 in AFR with 3,6bar controlpressure. 3% at idle. At 3bar 2% and 7%, 13.5 and 11.8.
_________________
Carl Fredrik Torkildsen

924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs

MikeJinCO · Posted: Fri May 17, 2013 11:12 pm Post subject:

I have two sets down at Jaguar Injector and they are all over the board for flow rates. Some flow half as much as others. I think many times running problems, burned valves and such might be from low flowing injectors. The fellow at Jaguar said that he has found that even 30% to 40% of new ones he has tested are off. I read one post where Ideola sent 5 sets down there to come up with 2 sets that flow the same. JMHO

The part number from Bosch for the early motors is 0437502013. One of my sets is a --008(unlisted by Bosch) and the other a ---018 which is listed for a Pougeot(SP).
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Mike

'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

I'm surprised Jaguar Injector is willing to work on those for you. The last batch I sent down were so bad we couldn't get even one set within spec and he refunded most of what I paid, and said he wasn't going to work on these anymore.

And yes, even new ones can have a huge variance in flow.

I agree with Mike that the poor performance of new OEM injectors is troubling, and I suspect that it accounts for many of the rough running problems we hear about. As these injectors age and (I suspect) eventually become harder and more expensive to acquire, it's just one more reason to consider going to EFI.

Now if only I could find someone to replicate my fuel rail.

Grrr.
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erstwhile owner of just about every 924 variant ever made

gegge · Joined: 27 Jul 2007 Posts: 1124 Location: Sweden

CIS injectors are mechanical parts that wear out, they are not serviceable. Most of them made of steel that will rust. By new ones for a functional CIS.

BTW, quote from Ideola: "...took me 5 sets of used injectors to get two flow-matched sets (within 10% tolerance)."
_________________
Carl Fredrik Torkildsen

924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

MikeJinCO · Posted: Sat May 18, 2013 3:16 am Post subject:

The Jaguar Injector man was more than happy to test my injectors. He said he has given up on ultrasonically cleaning them as it doesn't do much good. He tested them for(I believe) crack open pressure and flow.
_________________
Mike

'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

leadfoot · Posted: Thu May 23, 2013 2:38 pm Post subject:

and here I was thinkin the missus wouldn't mind if I used her jewellery ultrasonic cleaner for my injector parts... this may save me in more than one way...

Stu
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1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...

tyfighter123 · Joined: 19 Jan 2010 Posts: 551 Location: Colorado

Does any one know the flow rate that our injectors are rated at? And are there injectors with a higher flow rate that will bolt up?

Sorry to get us back on track guys!

_________________
Porsche 924 1977 N/A
Mustang GT/CS 2007
Porsche 924S 1987 (parts car)(cut up and recycled)
Porsche 911S 1976
Porsche 931 1980
Porsche 931 1980 (parts car)

gegge · Joined: 27 Jul 2007 Posts: 1124 Location: Sweden

As I said before, the flow is in the FD. You can´t get more by just swapping injectors. CIS is different to EFI.
_________________
Carl Fredrik Torkildsen

924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs

tyfighter123 · Joined: 19 Jan 2010 Posts: 551 Location: Colorado

Yes the FD controls the pressure and the presure curve is built into the FD via the plunger correct? So I understand that can't be changed,but the injector is holding back fuel so I am wondering if there are injectors what allow more fuel pass. So the starting point of the curve is at a higher point?

I hope that makes sense please correct me if my thinking is wrong.
_________________
Porsche 924 1977 N/A
Mustang GT/CS 2007
Porsche 924S 1987 (parts car)(cut up and recycled)
Porsche 911S 1976
Porsche 931 1980
Porsche 931 1980 (parts car)