Crushed fuel sock
 

I have crushed two fuel socks (last one OEM Mazda) with my return fuel system on my 1990 CSP car. This is my solution. Three stainless steel springs zip-tied to the inner crush lattice and zip-tied shut.
https://cimg4.ibsrv.net/gimg/www.mia...95bd42619c.jpg
https://cimg5.ibsrv.net/gimg/www.mia...e313c0d668.jpg
https://cimg6.ibsrv.net/gimg/www.mia...0158c856a0.jpg

I was stupid close to putting a hydramat in my 1990, fucking car couldn't turn left to save it's life. Is that what you are trying to fix here?

I am collapsing the fuel sock and at top power all the fuel must pass the small inlet hole. And it starves and makes a nice dark witness mark on the bottom of the sock.

https://cimg3.ibsrv.net/gimg/www.mia...8fc0ec914.jpeg

What size pump are you using to do this?

--Ian

I can't remember but it gives enough headroom running e85 with 200NA HP at the crank.

Here we go! I bought eight different fuel socks looking for the holy grail. Found it! The Denso has a plastic insert that prevents collapse. https://cimg8.ibsrv.net/gimg/www.mia...264cb1f3ae.jpg
https://cimg9.ibsrv.net/gimg/www.mia...f76401f273.jpg

I think this has already been mentioned here. Supposedly it is the only aftermarket option that is equally good or better compared to the OEM. At least this is what I had in mind.