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Carl, my question was just about the clearance from the end of the rail to the FPR's on the back of the engine. They sit pretty close and I was just wondering if you had any suggestions about the routing of the hoses. I have to get some photos up. My brackets for the rails came out great! Duc was kind enough to share his ideas with me and that started me on a path of removing some of the less necessary items on the top. I might just copy his install. If I install a new FPR up front like Duc did, do I need the fuel damper?
I want to say I am very happy with the rails and injectors. It looks like I hoped it would and I know it will run like a champ when it gets back together. Since I'm this far in now, I'm going all in and I plan do do some powder coat and spif up the whole look of the engine. I'll keep you posted and send some pictures as it comes together.
Thanks! Your build gave me some real inspiration to tear into it and pull out the cold start, decal valve and air pump. It looks a lot better now but still a long way to go.
Thanks for your help!
Really good work! For meeting the MBR (minimum bend radius) of the braided line, I have a couple ideas. Of course, try to re-position the fittings you are going to attach to to open the MBR if you can. If the items (fuel pressure regulator, dampener, whatever) cannot be re-positioned or relocated, then try a small coil of the braided hose.
That is, instead of making a 180 deg turn, make a 540 deg turn. You should find that there is a path for this that does not look too "funny".
It is easy to see why the stock fuel rails had such bad pinch points in them at the exits as Porsche was trying to go directly to each device.
You will not need the fuel dampener any more. You can safely remove it from the system. The -6 AN fuel line system you are installing will maintain its diameter throughout all the connections and the hoses, whereas the stock system had a number of pinch points and places where it was crimped or necked down. So your system will now be fluid dampened, and will not require the mechanical dampener.
First of all, I like replacing the stock fuel pressure regulators with a single Aeromotive fuel pressure regulator - we have done that on several builds and on our race cars too, and they work very well. Quality stuff.
I would dial your Aeromotive in to hold 43 psi in the rails at idle, and go from there. That's just a starting point.
I got the engine back together with the new hoses, powder coated intake. I removed the air pump and decel valve. After sitting for about two years it fired right up!
Thanks for all the help
I have removed the decel valve, cold start parts and the air pump when I installed the new fuel rails, fuel lines and fuel regulator.
I'm getting a thump, thump noise that seems to be related to the fuel pump when the engine is running. It sounds like it's coming from the passenger footwell. It is less pronounced at higher revs.
I can feel the thumping in the fuel lines. I'm not sure if I should turn up the pressure on the regulator or turn it down or if that has anything to do with the noise. The Regulator is set to 43 at idle now.
Any ideas as to how to stop the noise? Do I need some kind of fuel damper? Is this jus a side effect of changing the fuel system?
Looking for suggestions from anybody that might have changed out their stock fuel lines and had any similar experiences.
It always amazes me, the quality of work that some folks do. I've worked with mechanics that would have a hard time following your lead. I like it when a job looks factory or better...and you accomplished that.
03-08-2016, 08:58 PM
