968 Supercharger Kit Development
05-17-2010, 10:12 AM
#646
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Small Business Partner
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Small Business Partner
Did either FPR come off of a running car? Frankly if you've eliminated the return line, possibility of a clogged rail and gauge, I don't see how it can be anything but the FPR...
05-17-2010, 10:27 AM
#647
Developer
Thread Starter
I did not realise you still had our Stage 2 injectors installed. Please put the stock injectors back until we find out why this car has so much pressure at the fuel rail.
05-17-2010, 10:32 AM
#648
Developer
Thread Starter
Thanks for the reply on the fuel pressure question. Just want to clarify that your kit is simply bolt-on and I dont have to 'tune' the FMU on the dyno with wideband o2?
Im a bit worried with quality of our fuel here, at most its the 91 octane in california, do you have the air-fuel graph done during your dyno testing? Is it ok to see the results?
Any experience or comments if the tiptronic tranny can handle the stage 1 and 2 applications? thanks!
Im a bit worried with quality of our fuel here, at most its the 91 octane in california, do you have the air-fuel graph done during your dyno testing? Is it ok to see the results?
Any experience or comments if the tiptronic tranny can handle the stage 1 and 2 applications? thanks!
It is helpful to take the car to a dyno one time after the kit is installed to set up the FMU under load, but not required. If you have an air/fuel gauge installed, you can also setup the FMU under load on a country road (I have done that many times).
Here is a chart with A/F shown from a Stage 1 968 install. Note the nice flat fuel line!
05-17-2010, 12:42 PM
#649
Stock injectors fitted and the FMU hooked up. It runs, sort of, lumpy idle and still a high fuel rail pressure of 56-58 PSI and smokey. I need to fit my a/f meter next
05-17-2010, 03:10 PM
#650
Team Owner
Join Date: Oct 2009
Location: one thousand, five hundred miles north of Ft. Lauderdale for the summer.
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this is why i may take my car to Carls local installer when i do mine.
i need to visit some friends in Madison anyway... long overdue.
i need to visit some friends in Madison anyway... long overdue.
05-18-2010, 11:02 AM
#651
I have fitted the air/fuel meter and it`s at he uppermost of the LED indicators at idle, with a rail pessure still touching 60 PSI. So another FPR on it`s way from Germany and more $$$$, when will it end, or work 
05-18-2010, 11:13 AM
#652
wow! nice fuel graph that's just ever slightly leaner but very nice (still below 13 is good in my book)! after i finish replacing and changing all maintenance stuff and of course the steering wheel to 968cs this will be next for sure!
btw any feedback from people who has your kit already? looks like edz968s is still having problems
is his case isolated?
btw any feedback from people who has your kit already? looks like edz968s is still having problems
is his case isolated?
05-19-2010, 09:03 AM
#653
The car is now sorted and running beautifuly, spot on idle, a/f ratios, etc.
The problem; how can I put this.
I installed the intake tube that the blow off connects to, as I seen on the cover of the installation manual, so at idle with the throttle body closed, the unused air was being blown directly at the MAF sensor, giving it a real hard time of what was going on, correct positioning is in the manual. My excuse is no excuse, should have adhered to the instal process.
Re positioning the intake tube, so that the blow off air is facing into the SC head and not over the MAF, speakes for it self.
Apologies to Carl for all the e-mails and Thank You Carl for your patience.
Now to get out on the road
The problem; how can I put this.
I installed the intake tube that the blow off connects to, as I seen on the cover of the installation manual, so at idle with the throttle body closed, the unused air was being blown directly at the MAF sensor, giving it a real hard time of what was going on, correct positioning is in the manual. My excuse is no excuse, should have adhered to the instal process.
Re positioning the intake tube, so that the blow off air is facing into the SC head and not over the MAF, speakes for it self.
Apologies to Carl for all the e-mails and Thank You Carl for your patience.
Now to get out on the road
05-19-2010, 09:30 AM
#654
The car is now sorted and running beautifuly, spot on idle, a/f ratios, etc.
The problem; how can I put this.
I installed the intake tube that the blow off connects to, as I seen on the cover of the installation manual, so at idle with the throttle body closed, the unused air was being blown directly at the MAF sensor, giving it a real hard time of what was going on, correct positioning is in the manual. My excuse is no excuse, should have adhered to the instal process.
Re positioning the intake tube, so that the blow off air is facing into the SC head and not over the MAF, speakes for it self.
Apologies to Carl for all the e-mails and Thank You Carl for your patience.
Now to get out on the road
The problem; how can I put this.
I installed the intake tube that the blow off connects to, as I seen on the cover of the installation manual, so at idle with the throttle body closed, the unused air was being blown directly at the MAF sensor, giving it a real hard time of what was going on, correct positioning is in the manual. My excuse is no excuse, should have adhered to the instal process.
Re positioning the intake tube, so that the blow off air is facing into the SC head and not over the MAF, speakes for it self.
Apologies to Carl for all the e-mails and Thank You Carl for your patience.
Now to get out on the road
05-19-2010, 09:47 AM
#655
The pics posted by Butzi68sc and TF on page 39, also show the blow off tubing directed at the MAF. This would show up as an erratic idle experienced by others with this install, any feed back from you?
05-19-2010, 10:42 AM
#656
Developer
Thread Starter
I see that now, also. Those guys have that fitting installed backwards.
The result will be, at idle when the throttle plate is closed and the blow-off valve is open, the bypass-air
will be blown onto the hot-wire sensor and it wont like it. Errant idle and fuel readings will result.
MAF sensors require laminar flow over the hot wire and are very sensitive to turbulance.
Installing that fitting in the correct orientation blows the by-pass air at the supercharger inlet and away from the MAF, and normal MAF function is maintained.
If my instructions were not clear enough which way that is supposed to be installed, I may paint an airflow arrow onto the part.
The result will be, at idle when the throttle plate is closed and the blow-off valve is open, the bypass-air
will be blown onto the hot-wire sensor and it wont like it. Errant idle and fuel readings will result.
MAF sensors require laminar flow over the hot wire and are very sensitive to turbulance.
Installing that fitting in the correct orientation blows the by-pass air at the supercharger inlet and away from the MAF, and normal MAF function is maintained.
If my instructions were not clear enough which way that is supposed to be installed, I may paint an airflow arrow onto the part.
05-19-2010, 10:44 AM
#657
Developer
Thread Starter
Edz - you were a good fellow to have on the other end of the phone.... at least you tried every diagnostic I gave you without complaining so I could help you hunt this down.
I remember telling you to relax "its in there somewhere, we'll find it". Sure enough it had to be something simple. Glad you can drive and enjoy it now.
I remember telling you to relax "its in there somewhere, we'll find it". Sure enough it had to be something simple. Glad you can drive and enjoy it now.
05-19-2010, 11:02 AM
#658
Simple faux-pas.
Shall I reinstate the supplied injectors, so I don`t have to tune it twice.
Fuel rail is steady on 52 PSI.
Thank you for being patient with my abundance of e-mails.
At least you should now have a catalogue of fixes for any other customers
Shall I reinstate the supplied injectors, so I don`t have to tune it twice.
Fuel rail is steady on 52 PSI.
Thank you for being patient with my abundance of e-mails.
At least you should now have a catalogue of fixes for any other customers
