Evening Gents,

I’m looking for some suggestions on what you guys are doing for fuel rail setups on the TBSS Intakes. I’m buying one for the LQ4 I just finished, to replace the stock truck manifold that has a cracked off vacuum fitting on the side. I bought it like that and always planned on changing it out anyway.

I was initially going to do either the Holley mid-rise or a Victor with either an elbow or accufab, but after familiarizing myself more on these intakes I decided the TBSS is a better match for my setup and intended use.

The setup I’ll be dropping in the car is a SBE LQ4 with a 4L80E. I installed the summit stage 2 turbo cam, dual springs/pushrods/trunnion upgrade/oil pump, etc. all the usual supporting mods.

I’m still weighing options for turbo selection but will likely do either the VS 7875 or S480. The goal is 750-800whp in an ‘88 Foxbody Hatch using the Holley Terminator X for engine management.

The fuel setup that I have planned out currently, which I’m hoping will support this goal is:

-Aeromotive 525lph In-Tank Pump
-10AN up to a Y-Split, with 2 -8AN lines to the back of each rail
-8AN lines from the front of each rail to an Aeromotive A1000 Boost Referenced Regulator
-8AN from regulator back to the tank
-100lb Holley Terminator X Injectors (40mm length)

What I’m trying to figure out is what rails to use that have an inlet and outlet at each end and would support this injector height on the TBSS manifold?

While trying to research rails, it got very confusing with the LS1 style, truck intake style, crossovers when I don’t need crossovers, etc. I wasn’t able to find a set that specifically works for this combination. I’d rather not fuss too much with creating brackets and whatnot, not that I don’t have the ability to do it, I would just prefer a simple install.

If you guys have any help you could offer I definitely appreciate it, and if you see anything in my proposed fuel setup that you think I should change to support my goals, or if you think it sounds solid, I appreciate that feedback as well.

 

Am I overthinking this? Do you just use any rail mounted to the tbss intake with the taller injectors or injector spacers? Or are there truck intake specific rails?

 

im using the stock rails, used an aftermarket regulator, pressure into one side, out to rails from the other side, run the return line as normal.

 

what power level are you at?

 

i made 598 at the hubs on 19psi with twin 6162s through a th400 with a converter that flashes to about 5200. somehow the dyno said converter slip was pretty minimal, but i think it should have been making quite a bit more power than what it read.
my fuel pressure sensor is on the rail opposite the inlet and it reads 70+ psi pretty solidly. for what its worth, im in the midst of replacing the combo with a ls3 and twin 6762s and wont be replacing the stock truck rails unless it shows to be required.

 

I'm using the Fassster rails with bosch 210s. fitment is good so far but i havent fired it up yet.

 

I was looking to do a setup that would allow a dual feed to the rails and dual return to the regulator. I have the stock truck rails on my stock truck intake that I could move over to the TBSS intake if I want, I’m just not sure of their condition because they look pretty rusty and I’m not sure if they can handle flow for my goal of ~750-800whp on a turbo 6.0. I’m going to make a separate thread for fuel setup advice (pumps and whatnot). For this thread I’m just trying to figure out a rail setup

 

If you end up buying rails please share because I’ll be upgrading mine eventually. For now the stock parts have not been an issue.

 

it’s looking like the leading contender for me is likely going to be the Holley rails (HLY-534-244). They’re reasonably priced and come with front and rear tapped for -8AN O-Ring. They include 4 -8AN o-ring to -6AN adaptors, but I’ll likely put those in a drawer somewhere and just get -8AN o-ring to -8AN fittings. They also come with an assortment of brackets and are advertised as being specifically designed to fit truck intakes.

If I end up going with them I’ll post my findings here.

 

i was planning something like this: https://www.ebay.com/itm/166222851108
the hose would likely go in the trash but for the rest i dont see a need to spend twice as much to put the h word on them

 

I used the early 2001 year range return style fuel rails and widened the crossover by cutting it and welding a stainless 6an fitting to the base of the crossover and using 6an line to connect the rails. Works good, and was nearly free. They are only a 3/8feed and 5/16 return though. You can make plenty of power on 6an, I am running 70%ethanol content through them with 10psi boost on my 6.0L. 600whp by my butt dyno and no issues.

 

the only issue I see with that one is that it’s advertised as being for square port intakes, unless they have a cathedral or truck intake version on their store, I’ll look. I’m also not a big fan of the spacers going under the injectors on their setup instead of on top.