Roundabout

iTrader: (8)

Is this part of the banjo bolt on the carb or the tiny in-line filter looking thing on the return line?

I just ordered a Holley FPR and gauge from Kim's FB and need a little install advice. I am attaching the picture she took of it in her car.
Thanks!
Justin

Roundabout

iTrader: (8)

it doesn't look like its hooked up right in that picture.... please correct me if Im wrong

Dan_s_young

iTrader: (1)

The picture is hard to tell where everything is hooked up. The fartherest to driver side fuel line (that is mounted on the firewall) is the fuel line coming from the pump. Then that hose will attach to the bottom spot of the FPR. The way I have my fuel pressure gauge hooked up is inline (I have the exact fuel setup) between the FPR and the carb. But then the regulated fuel will come out the side of the holley FPR. Here is a picture of my setup hopefully this helps.

Kim's FB

Yeah, Dan has his set up a little different than mine, but works the same. The fuel line from the pump is going on the bottom port just like Dan's, then the left side is used for the gauge, and the right side of the fpr to the carb.Here's a couple of pics so you can get a better idea:

bad 83

iTrader: (3)

You almost got me confused looking at those pics. If you are using a 3 port regulator, you have two options. The pressure line from the fuel pump needs to go to the "IN" side of the FPR. The "Out" side of the FPR needs to go to the carb. The 3rd port can go to two different places depending on whether you are running the stock carb or aftermarket setup. Option 1 with the stock carb. Run the 3rd line to a gauge. Option 2 with a aftermarket carb. Put a tee in the line going from the FPR to the carb to run to the gauge. Run a line from the 3rd port to the FPR to the return line going back to the tank. Hope that didn't confuse you.

Roundabout

iTrader: (8)

ah yes, i didn't see that there was a line going to the bottom of kim's fpr. Looks pretty easy.
I forgot to separate my question from the project Im starting when the fpr gets here. I was wondering where the stock fpr is... is it part of the banjo bolt on the carb return line or is it the little bulb on the return line between the firewall and the carb?
Thanks!

vipernicus42

iTrader: (4)

Yeah, make *sure* that the "IN" from the fuel pump is going into the bottom.

I've got mine mounted in the same place, the gauge on one side and the other side going to the carb.

I will be setting it up like Dan's this summer when I get my new gauge.

Jon

vipernicus42

iTrader: (4)

Dan, nice motomaster oil filter

Where did you get the 90* connection on the bottom and the block-off bolt? Mine didn't come with any connections and the only ones I could find were brass plumbing connections (which I now think were threaded differently than the FPR, man they were hard to put in)

Did your gauge come with that in-line connector on it, or did you have to add it? What type of gauge is it?

Jon

Roundabout

iTrader: (8)

or is there a stock FPR on these cars?

85rotarypower

There is no FPR on these cars stock. The pump puts out a set amount of pressure (2.5psi for 79-83 and 3.5psi for 84 and 85), but the stock carb is not really that fussy with fuel pressure changes.

Dan_s_young

iTrader: (1)

Hey, I had to gather up the fittings from Canadian tire (also where I got the motomaster oil filter, lol). And to put the gauge inline I got a unit from summit racing where I just threaded the FPG in and hooked up the fuel lines. As far as the gauge goes its a 0-15 psi gauge from summit racing, which I DON'T recommend buying because it doesn't seem to be accurate at all and it shuts off after like 3 minutes for some reason... Some others are also running the same gauge with the same problem, so to solve it we need to find a accurate 0-5psi gauge (which hasn't been done to my knowledge).

Roundabout

iTrader: (8)

thanks for all the info guys/girl!

Roundabout

iTrader: (8)

Update! Thanks Kim! I got the regulator today and mounted it on the firewall. I think I have a couple options and was wondering what would be the best.
I am using the stock carb (for now) and was pondering 'bad 83's post. If I run the pressure line to the bottom (IN) on the regulator, have the gauge hooked up on one side and just run the third port of the regulator to the carb and left the return line on the carb hooked up as is (stock) would this work? and would the gauge still give me an accurate reading?

Roundabout

iTrader: (8)

anybody?

Roundabout

iTrader: (8)

i hooked it up as I described above and couldn't get more than just over 1psi on the gauge. I turned the little silver bulb on the return line around so the arrow is pointing towards the firewall and now I can get the psi up to around 4.5psi. I backed it off to just over 3psi and everything seems fine except for the loss of power around 6k

trochoid

iTrader: (6)

I've run across the same problem trying to get the fuel pressure up on the Holley regulators. They are a non-return style and by turning the oneway vavle/stock fpr around worked for me also.

Roundabout

iTrader: (8)

thanks trochoid!

Radial GT

iTrader: (16)

Ahhh the old non return carb....

peejay

In other words... when you use a fuel pressure regulator, cap off the return line!

REVHED

What fuel pump do you have?

Roundabout

iTrader: (8)

Well its an Airtex that came in a carter box.... AIX E8012S

vipernicus42

iTrader: (4)

So the FPR won't actually regulate fuel pressure unless we cap the return line?

How does that make sense? Will a holley 1-4psi FPR regulate the fuel pressure even with the return line open? Should I cap my return line to have better control of the pressure?

I just want to know the best way to set it up since I have a Mallory Comp70, and I would think that capping the return line would be a bad idea. I want to make sure my Rx7Carl/Sterling supercarb gets *exactly* what it needs for fuel pressure.

Jon

trochoid

iTrader: (6)

Depends on the pump. The Comp 70 may require a return line, if it does, then you need a return style regulator. I have the Comp 140, yeah I know, way overkill, but it came with the 4309 return style fpr.

What i didn't know when I bought it, the fine print thing, was that the 140 requires a minimum 3/8" return line, so now I have new 3/8" supply and return lines on the car.