The Alchemist

iTrader: (19)

Well I did a search and came up empty.

Right now I have Lonnie's double in tank setup with a hobb's switch activating the second pump at ~4lbs of boost. I have Speed inc fuel rails, and other than that, a stock fuel system.

So how difficult/easy is it to go to a boost reference fuel pressure regulator?

Lonnies Performance

iTrader: (16)

It is very easy.

Set your fuel pressure with the car idling, vacuum line disconnected.
Then connect vacuum line.

Adjust your injector flow tables for boost reference, which sets the flow table to the same number across the board, since the regulator now adjusts to compensate.

Under boost you will now be rich as the additional fuel pressure will increase flow.

The Alchemist

iTrader: (19)

So do I eliminate the stock fuel pressure regulator? I'm not even sure where that's located.

I'll continue searching for an install on it.

Ollie8974

The fuel pump is located in the fuel pump module located in the fuel tank.
To remove push up on the spring clip.

The Alchemist

iTrader: (19)

I wish I had known this when I put the double pump kit in from Lonnie. I would have gone to the boost referenced regulator at the time.

Another lesson learned after the fact.

Lonnies Performance

iTrader: (16)

Since you are my customer you should call me & I will explain it in detail to you.

The Alchemist

iTrader: (19)

Sounds great Lonnie, when's a good time to call?

Lonnies Performance

iTrader: (16)

9:00am-11:00pm eastern 7 days a week.

JoshuaGrooms83

iTrader: (2)

any more info on this since i recently found this out myself about needing one of these.

The Alchemist

iTrader: (19)

This is still something I need to do. My to-do list just keeps growing, I wish I had more time in the day to get things done. Maybe over the winter when I don't have yard work to do I'll be able to drop the tank again, remove the factory regulator and pick up a boost referenced one.

Lonnie, I haven't called because I've just been too busy. I don't think I have 200 miles on the new motor since finishing it on July 1.

Lonnies Performance

iTrader: (16)

Whenever you are ready let me know.... I know all about a lack of free time.

As for "needing one", you typically do not under 650-700rwhp.
Once you exceed this power level the factory regulator does not control the pressure that well. At this time it is best to locate the regulator at the front of the car with a return line. Then you can boost reference it & help out with your injector flow at high boost levels.

JoshuaGrooms83

iTrader: (2)

ah, thats what i thought originally, but wasnt sure. think i might have this as a side project once i get the run full up and running with the turbo for my modest 500hp starting goal.

bmf5150

Who makes a good one and not to expensive?

JoshuaGrooms83

iTrader: (2)

Aeromotive has some pretty affordable pressure regulators for the simple ones.

The Alchemist

iTrader: (19)

So what do people typically use as a return line? Do they run a new supply line, then use the factory supply line as the return? What about the second fuel line that runs to the engine bay? What's that used for?

jtotheizzo

The second line in the engine bay with the green fitting inline is your evap line. Personally I think the easiest way to accomplish adding at FPR is just remove the return line from the "T" in the back, then run a return line from the FPR to the port on the bucket that the line you just removed from the T goes to. Then remove the stock FPR from inside the tank. Bing, bang, boom, Done.

You can use the evap line, but personally I would rather leave the EVAP system intact. I think it is easier to run a new line 10' than to reconfigure the evap system.

JoshuaGrooms83

iTrader: (2)

forgot all about this one lol ive since set up my car to run a BR FPR, just havent sent fuel through it yet lol
Heres a few pics on how i ran mine.




6 AN Male To 14mm x 1.5 O-Ring plug for the t-block and a 6an cap of course.

6AN Male To 5/16" Quick Disconnect Male Fuel Fitting to hook up to the stock plastic fuel line in the back. its in the baggy if you cant see it lol


just to make sure though, i still hook it up to the brake booster hose right for the vac/boost source? just making sure

JoshuaGrooms83

iTrader: (2)

quick question on this, where do you hook it up at when i start using it with boost? i hear alot of back an forth on before or after the throttle body... if its hooked up to the vacuum its possible that the fuel pressure can drop. my question on this is, if the fuel pressure is set with out boost in idle vac at 58psi and is ment to keep the pressure set at 58ps, how when in boost is it possible for the fuel pressure able to drop even below the set 58psi idling vac condition?
if its just hooked up to boost,ie before TB, its doing this anyway right?
just want to make sure i hook it up right

HRHohio

Deleted out.

JoshuaGrooms83

iTrader: (2)

??? HUH?! lol i think you miss understood what i was talking about lol im not talking fuel pumps, i was asking about the boost referenced fuel pressure regulator and where to hook it up exactly lol you had me all confused when you were talkign about hobb switches lol unless im suppose to have that on a hobbs switch too but i didnt see that anywhere...