Does anyone run a Cartech adustable FMU?

[xjarayax]

I have a couple questions for you- jaraya@austin.rr.com

Thanks

[xjarayax]

Well, here's my question..

Hello, I found your site while doing a search for "Cartech FMU."

The other FMU's I have worked with only have one vaccuum fitting on it, but this one has two, one on each side.

I'd like to know which one connects to the intake, and what the other one connects to?

Also, I bought my unit used without any instructions, and I am unsure how to "adjust" the ratio of the FMU, and how would I know what it's set at currently?

I don't want to plug it in and instantly lean out my car and blow a head gasket or something.

Here it is:
http://www.gadgetonline.com/FMUCartech.JPG

I will call Cartech if no one knows.

[Hotzzz 3.4]

ya i got it, with the manual. e-mail me, i can either read u parts over the phone or maybe scan a page for u or something.

[TurboProject]

I run one too. The vacumm/boost line coming straight out(not the one w/ the thumb screw) is the one that you connect to the manifold vacumm. The other is a bleed off for the boost(boost actually blows out of it to adjust how much you want the fuel pressure to go up w/ boost). That's what the thumb screw is for...screw it in and you'll get higher fuel pressures per psi, screw it out and you'll have the opposite affect. They actually sell a check valve that only lets boost out and not cause a vacumm leak when not under boost but I also got mine used and didn't have that check valve so I just have a very small vacumm leak, but it doesn't bother me. To adjust the fuel pressure at 0 psi/0 inHg you dissconnect and plug the vaccum/boost signal line and then losen that jam nut in the center of the unit and screw the allen head screw in or out to adjust the pressure. To do anything acuratly you need a fuel pressure gage. I have a fuel rail mounted one that's on a long enough braided line that I can see it from the drivers seat with the gage near the wipers. Set the 0psi setting near stock and on the thumb screw one err on the high side or being rich and then come down as much as you think is good to not run lean.