Fore makes a vacuum/boost tree for these exact lines. In the event i have to pull my blower one day I'm going to do all hard lines. Seems like it would certianly be an improvement on signal
The bad weather moved in so my car will probably be sitting for a while so I won't get test data, but I thought I'd post my new boost/vacuum reference line I put on my car.
As mentioned earlier in this thread I was running 5'+ of 1/4" fuel hose as my boost/vacuum hose and seeing some pressure spikes. I wanted to do my best to do what I felt would give the best most consistent signal to the regulator so I decided to try some DOT Air line. For those not familiar with the stuff its commonly used on big trucks as they have air compressors on them that run tons of things. The stuff is cheap, durable and just plugs together.
I stopped by my local carquest and picked up 8' of 1/8" hose.
http://www.truckshop.com/product.php?productid=16612&cat=319&page=1
I then got one of these to go into the regulator
http://www.truckshop.com/product.php?productid=16670&cat=319&page=6
and was out the door for $8 total. The fitting threads into the regulator port and the hose just plugs in. Once its in it won't come out unless you push down on the little collar to unlock it and should handle 120psi. As for the connection to the vacuum harness I just used a rubber boot I had and forced it onto my Y connection for the FRPS, then stuck the DOT airline in and ziptied it.
I don't like to cut up my factory stuff but if you wanted a fail proof setup you could probably get an compression coupler to connect this to the stock line and it would never come apart. Also the 1/8" isn't an exact match to the stock redline as thats probably metric in size but its darn close.
If the weather improves I'll try to do some testing, but I know this has to give a quicker more consistent signal to the FPR.
That looks just like the stuff I use for my methanol injection. I can't tell exactly from the pics but if it is the inside diameter is much larger than the boost/vacuum hose I posted a link to.
I should add that my fuel pressure still fluctuated a little more than I liked even with the hard plastic boost/vacuum reference line I put in place of the rubber hose. I decided to put my front fuel line crossover back in and my fuel pressure evened right out with maybe half lb fluctation. I feel that I have the perfect setup now, thanks again Malcolm.
I should add that my fuel pressure still fluctuated a little more than I liked even with the hard plastic boost/vacuum reference line I put in place of the rubber hose. I decided to put my front fuel line crossover back in and my fuel pressure evened right out with maybe half lb fluctation. I feel that I have the perfect setup now, thanks again Malcolm.
PERFECT timing finding this thread as I am plubming my new rails. Ill be moving my regulator (shame its so nice looking just to be hidden) to the drivers fender as thats where my return is.
Thanks Malcom! Awesome work!
I was looking through this thread again, can you tell us what your final layout is here just to be sure Im understanding correctly. I still havent done anything with mysetup, been working on other things and this isnt really a problem at the moment so its pretty far down the list
I'll see if I took some pictures of my setup in the fenderwell when it was apart, but I'll see if I can explain it.
My kit started life as a Fore level 1 before upgrading it, so the regulator I have only has 3 ports on it, 1 for fuel in, 1 for fuel out, and 1 return port. I mounted the regulator in the front bumper like Malcolm did, and luck would have it you can read the gauge from the brake cooling hole in the bumper.:coolman: Anyways I have a single 8an feed line coming out of the regulator and into a Fore Y block in the fender well. From there it splits into 2, 8an lines and one goes into the back of each Fore rail.
Originally I ran this setup with the front of each rail capped basically resembling the OE setup and I'd have large pressure fluctuations. I then added the plastic boost reference line instead of the rubber line and it cut a few lbs off the fluctuation but it was never as good as my previous non dead head return setup. I decided to try removing the caps and putting a front crossover back in and my pressure fluctuations dropped to under a 1lb. I assume its because now the extra pressure can relieve itself to the pass. side if need be.
At first I was regretting this mod as I had a few bugs that kept it from living up to the non dead head return setup, but I'm now 100% happy with it.
^^ Still heating and returning fuel to the tank. See my fuel rail temps above and that was without boosting! I spoke with my tuner and a handful of owners with much more experience and HP than I and they all have zero issue with DH'ing.
^^^ dont see how you could do something like that could work...all I can figure is the feed line would end up pressurizing the return line