FD Fuel Step Up Kit
 

FD Fuel Step Up Kit | Full Function Engineering

I picked up this kit (along with some ID2000 injectors and some other gear) recently, and it seems like the best solution for upgrading an FD fuel system for mild/moderate modification.

The only thing I would change from what I've seen so far is that on the ordering page, it should have the option to include the low-profile banjo adapter. Anyone running stock twins with stock hard lines will need this, but there is no mention on your site.

It would be a service to your customers to have the option clearly visible (with a brief explanation) on the above page, in the same way that you offer the appropriate belt along with the idler pulley (for an additional cost).

I'm looking forward to my second order arriving so that I can continue my build :icon_tup:

Not sure if was just me, but I had a clearance issue with the coolant line from heater core to rear plate hitting the vacuum port on the regulator. Had to bend some mounting spots for enough clearance but everything else was good for my single setup.

The clearance issue I'm talking about is on the non-firewall side. There is a manifold with vacuum lines coming off of it that will be in the way for people with sequential twins.

I guess I was wrong about the low-profile banjo bolt being helpful. It doesn't help in connecting the FFE secondary rail to a stock primary rail.

Even with bending hard vacuum lines (and cutting away the ones I won't be using), there still isn't room for the stock banjo adaptor that came with the step-up kit

Does anyone at FFE have a suggestion on what parts/hose I can buy that will allow me to hook the low-profile AN fitting to the stock primary rail?
Or any suggestions regarding using the parts from the step-up kit on a car with stock twins?

FWIW, my primary -> secondary line is pre-recall

Thanks

Did you ever find a solution? I'm having the same issue. Twin sequential with full rats nest. Looks like the vertical lines behind the thermostat housing are in the way. Were you able to bend them out of the way and how did you do it?

Not 100% following what the problems you're running into was, but I've run this setup with sequential and non sequential and didn't have any problems.

I installed the FFE step-up kit on my car with sequential twins & ACV, etc.
 

I believe the only thing you need to do is modify the vacuum hard-line cluster to fit the FFE step-up kit. This is not hard to do using a dremel and some epoxy. I took a bunch of pictures showing what I did to get around this (not sure how to re-size pictures?).

Here is the interference with the fittings connected to the secondary rail and the vacuum hard-lines:
https://cimg2.ibsrv.net/gimg/www.rx7...4ad3af647e.jpg

If you disconnect the vacuum hoses on the other end of the hard-lines and unbolt it, you can move it around and see that the main interference comes from the branch of the cluster that has the little cylindrical manifold on it. It needs to be raised up so it doesn't hit the top of the stock banjo bolt connected to the secondary fuel rail:
https://cimg6.ibsrv.net/gimg/www.rx7...8b30266312.jpg

This is where I busted out the dremel to cut the hard-lines into two pieces:
https://cimg7.ibsrv.net/gimg/www.rx7...8a5619f8bc.jpg

Then, mount up the part of the cluster that was not the main problem--I may have had to bend this a bit to gain a bit of clearance, I can't remember:
https://cimg2.ibsrv.net/gimg/www.rx7...6a32a42ecb.jpg

Next, I positioned the other part of the cluster to a position where it had a bit of clearance with the fuel rail fittings. You can see, I actually put a thick washer on top of the fitting to help me hold the hard-lines in place. At this point, I put some epoxy on the hard-lines to connect the two separate pieces.
https://cimg3.ibsrv.net/gimg/www.rx7...f31b8beaf1.jpg

Then, when it had set enough, I removed the hard-lines and added some more epoxy (at some point I blasted them to remove the finish):

https://cimg2.ibsrv.net/gimg/www.rx7...7d9112f533.jpg

Once I was satisfied it was solid, I added some paint and installed it back in the car:

https://cimg3.ibsrv.net/gimg/www.rx7...511452cb60.jpg

Not a lot of clearance, but I felt comfortable with it. On the other end of the hard-lines, I did have to use a new slightly longer hose on one of the connections. There were a couple of vacuum hoses or coolant hose connections you have to watch out for as well.

Hope that helps!

I ended up hacking up those hard lines. I didn't need most of the tubular manifold one because I switched to MAC solenoids. It was a pain in the ass that seems like it shouldn't have been necessary

Getting new primary injectors are also good, because most of the fuel injectors are old and are not as capable as new fuel injectors, and definitely not as crisp to tune at idle. I suggest replacing all of them, especially since you use the primaries ALL the time.