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-   -   what would you do? EFI conversion issues (http://forums.pelicanparts.com/porsche-911-technical-forum/270704-what-would-you-do-efi-conversion-issues.html)

cmonref 03-25-2006 07:26 AM

rfuerst911SC,

The injector rating of 30 pph was made at a fuel pressure of 3 bar = 43.5 psi. If you are running 48-50, your injectors would be delivering as if they are 30 x sqrt(49/43.5), or 32 pph. That would richen the mixture since you told MS that you were using 30 pph injectors.

Mr Beau 03-25-2006 10:59 AM

30 lb injectors will support over 300 HP...the only problem is that getting proper fuel delivery at low engine speeds can be problematic. The injectors aren't _that_ big but it'll probably take more tinkering to get it to idle correctly.

rfuerst911sc 03-26-2006 12:23 PM

Well I'm extremely happy to report my car is actually driving on the road!! Today I did some tuning to the warm up enrichment and to the idle/off idle MAP. To be honest I'm quite nervous over this tuning but as I do it in baby steps it doesn't seem so bad. I've got a pretty good idle and off idle is not too bad with just a slight bobble, other than that she pulls like crazy when you bury your foot in it and the sound of those 6 throttle bodies is incredible !! I'm guessing like anything else with practice this become no big deal. The next step will be " data logging " for additional info on engine performance. I have a autocross the end of April and I can't wait to show off my "winter project". I can't believe this is where I'm at vs. where I was a month ago. All the help from this board is GREATLY appreciated !!! I hope it's not an omen but today on a foot to the floor run a bird crapped all over my freshly washed baby, I'm thinking I scared the crap out of it, that's my story and I'm sticking to it.


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