Hi Aaron,
Thanks for checking in, I appreciate it.
I priced one of those "overflow valves" as Porsche calls them. At $161.00, I'm glad mine is working well! My backup plan was to hide a modern regulator under the car.
This post by Early S Man describes the restrictor. Basically a 1mm orifice in the location I showed in my etch-a-sketch schematic markup.
Also, one of the banjo fittings (return from MFI pump head) on my fuel filter console has been brazed up and drilled a bit smaller (guess maybe 2mm) as described in my earlier post.
I was playing with the pump dyno tonight (more on that later) and I wasn't able to get the feed pressure to drop at all even at some ridiculous delivery volumes, so I am going to leave well enough alone.
Thanks for the tip on the filter, that never occurred to me! I'll be sure to add one at the suction of the pump up front.
Honestly, it's an honor to have you checking in on this thread! I know you put together that GORGEOUS MFI powerplant for STR 002 and it has been a big inspiration to me. I keep watching the Jay Leno video and hope I can get mine to run half as well! Any tips on tuning the MFI pump? I've got datalogging for throttle position, MFI rack position, AFR, and RPM planned. And I have a good idea what the WOT/full rpm fuel delivery should be.
I'm using the 2.7RS space cam, DC43-102 (Kinda like Mod S+) 39mm/36 ports and waiting on the new 41mm SSI heat exchangers. Might temporarily use ebay 1-5/8 headers if there's a wait on SSIs.
Last but not least I'll be installing a classic retrofit CDI+ so I can program the curve I want.
Thanks again!
Quote:
Originally Posted by BURN-BROS
Hi Johnny, system fuel pressure is set by the Filter console check valve. Part #901 110 915 01 I am not aware of any other restrictor in the return system. Can you let me know what it is and true location?
Also, FYI..the filter elements are not doing their job in regards to removing foreign debris! I have had to install multiple add on filters to solve the issue.
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