FMU should have one inlet port from the pump, one outlet port to the fuel rail via filter, and a bypas line to return to the tank, on the vacuum side of things it will have a manifold vacuum lime IE from the FMU to the manifold , and a vacuum line directly back to the airhorn ( this is incase of FMU failure dumping raw fuel to the motor and not in the bildge . With out a boost / Vacuum line to the manifold or a source of reading the amount of boost your prohcharger is putting out the FMU has no signal to increase fuel preassure, no line , no worky.

As far as fuel pump goes Smitty will chime n here I am sure.

Bryan

Hello OSO memebers
I'm new to OSO, I've been on the site before and decided to join. I have a 98 Ultimate Warlock 28SXT. I bought it a couple of years ago, 502, procharger, lots of headaches. The motor blew last year. It's now 509" SRP pistons Brodix heads CMI headers new fuel system. I to am having issues with fuel pressure on the big end. Aeromotive 11108 pump -10AN feed -8return, adjustable regulator on the stock merc fuel rail.After reading this thread I feel I'm more confused to my next step. I looked at the cartech FMU and it states that it installs after the stock regulator, and the is a replay that states it goes on the feed side of the rail. Base pressure is about 35psi and stays there. Any input would be very appreciated.
Thanks in advance
Jason

I was going to buy a cartech FMU anf figure out the fuel line issues later, but I am having trouble contacting them. Do I have to go through a distributor? If so who?

Thanks

Jason

Call them direct...In San Antonio 210-333-1749

I ordered one today..........They should be there...on a side note Superchargers online has what looks to be the same unit for less money....http://www.superchargersonline.com/p...umber=BEG-2027

I ordered from Car tech....they told me it was the older version....not sure if it is true but at least I know I am getting some support if I need since I bought it directly from them....

Bryan

Thank you
I tried calling that number listed as the fax number as well as the phone number, both with no luck. The phone just rings & rings. I'll try again Tuesday. I just want to get my boat running correctly. Thanks for the reply

Jason

Bringing this thread back from the dead.....


You can also buy the FMU direct from Bell Engineering. They are the ones that actually make it. $199

http://bellengineering.net/Pages/products_FPR.html

Thanks for the reply Griswald.
I have since bought and installed the Cartech FMU. It is installed on the return side of the fuel rail then to the gas tanks. It appears to be working correctly. After fisrt install I made a pass the motor sounded like it was super fat. I tune the FMU per the instructions. It runs ok now but......
The motor will only turn 42-4300 RPM's I have all -10 line feeding the stock fuel rail/injectors and -8 return. If I knew how to post pics I could show what I have done. I tried going to a 28" bravo 1 from my 30" just lost about 5MPH same RPM. Could/is the factory fuel rail be to restricktive? Also I am only running about 150 deg motor temp. Is this too low a temp to get out of cold start mode, or is the motor just starving for air. The weather is starting to break here in MIL WI. and wanted to get this straigtened out. any furht help would be very helpfull.

Jason
p.s. Still the same guy as the old posts just went through some changes and had to re-register

every body seems to have a bunch of good ideas" but did you remove your anti siphon valves from your tank. if not you will never flow enough fuel.

I have not been in the tanks, the only thing I have done to them is remove the plugs from the return bungs to plumb the return lines from my FMU. How would I go about doing this?
Thank you for the info.

Jason

Not to over simlify things, but as I have preached in the past, DYNO TUNE THESE ENGINES. Every engine reacts differently, and needs to be tuned perfectly to last. Its the oly way to go for piece of mind.

In my humble opinion, and humble experience.