I installed a powerdyne set up yesterday and it was a used one so i had too do alot of changing around and making things work and things like that but over all the install turned out pretty good just took a wile..last night after it got it all in and running i was unable too hook up the FMU because i didnt have the tool too unhook the fuel lines so when i test drove it it was making very little boost 2-4psi and would start too lean out around 4k rpm so i would let out of it.. anyways i drove it around a bit and got it home too discover oil dripping from under the car.. it was under there pretty bad so today i got the tool, hooked up the FMU and no change in A/F ive changed around my vacum hook up and everything and its good there is also a little needle valve on the vacume post that i dont know what its for but i tried it open and closed with no results.. and for the oil leak i unhooked the PVC and blocked it of at the TB and that seems too have stopped it seems like it was blowing boost into the crankcase and blowing oil out the rear seal.. is that possible? i also changed too autolite 104s' gapped too .035 today and all that stuff seemed too have helped its boosting more and faster and feels alot stronger.. i alsot fixed a bad hose clamp that i thing was loosing boost but anways im still going really lean and the FMU seems too be set up good so what could be the problem? i have as stock in tank and and MSD inline those not stout enough? id think i would atleast notice a difference with a working FMU any ideas??

 

yeah youve gotta block off the throttle body hook up, loop the pcv back onto itself and tie the vent line from the passenger valve cover down to the intake of the supercharger.

 

I left the PCV system completely stock except I routed the passenger side breather hose over to the intake side of the blower and capped the throttle body. If you keep your crankcase under vacuum it will not leak.

These cars have a lot of blowby even with new rings. Thats why they put such a big PCV system on them.

You might consider putting an air compressor water separater in the breather hose to keep oil vapors from getting into your supercharger intake.

For your fuel problem. How do you know its going lean? Are you using a wideband? Try putting a fuel pressure guage on the shrader valve to see how much the FMU is raising fuel pressure. It should be raising fuel pressure on about a 3-1 ratio to boost. ie: 1 pound of boost = 3 pds of fuel pressure.

 

yeah...you need a way to keep tabs on the FP

 

ive got an autometer A/F guage.. thats ill i have too keep tabs on the FP right now.. i was planning too just go ahead and get an electric FP guage too go inside.. how am i sappose too get a pressure ready under boost with my guage under the hood? and i thought this FMU was sappose too may 8psi for every pound of boost?

 

Before I got my interior FP guage I used to tape the gauge to the windshield.

There is a lot of variables in what ratio your FMU should be set at. I'll bet it is not increasing FP like it should.

 

how can i fix that.. i know very little about the workings of an FMU.. i know what it does and basicaly how but would know how too adjust it or work on it really ive got no kind of instructions or anyting on the whole sytem and powerdynes web site doesnt say ****

 

Ask them to email the instructions or owners manual to you, they should have it in PDF. Dont beat on the car until you have it solved or you'll be joining us in the rebuild club. And be careful when you first test it, if you have done it right the car will get real squirlly on you. That extra fuel makes a BIG difference.

 

yea i have been taking it pretty easy on it and keeping the big pullie on it.. once i get the fuel issues worked out ill pullie it up a bit.. id like too get this fixed ASAP i wanna make a pass by next weekend haha

 

As said on the first reply... disconnect the tube going from the passenger valve cover to the throttle body. Plug the throttle body port and let the hose vent to the atmosphere.

 

Did you also placed a additional breahter on to the passenger side valve cover? or just the hose to the air inlet tube.
I am expiereancing the same thing with the oil leakage after installing a paxton unit last weekend.

 

well as far as the oil leak goes i its it better.. i thought it stopped but its still worse than before the charger but nothing like it was until i unhooked the PVC from the TB.. i think it just kinda finished off an old worn gasket or seal wile under pressure.. that i will address but my main concern right now is the fuel system.. thats what i was asking about how too fix.. i cant get enought fuel too it.. i dont think the FMU is working at all.. its got a good vacum its just not working for some reason.. it doesn have some sort of bleeder/needle valve on the vacum post on the FMU... i also have the BOV split off the same line as the FMU and if i open that valve it just lets air in and under boost out im assuming and the BOV barely if at all works wile its open but the FMU doesnt work no matter where its set.. could the FMU just be bad? how could i test it? i thought about just unhooking the FP regulator too see if the pumps could keep the pressure up at RPM.. would that work? i know it would be a hella rich under most RPM but wouldnt i atleast see if the pump are capable at high RPM?

 

ok heres one i unhooked the vacum from the FP regulator and it seemed too make no difference in the way the car ran and didnt produce any kind of results on the A/F guage

 

alright one more update.. i just pulled the FMU off and too the back plate off and everytthing seems to been in new condition and working perfect so im thinking my problem goes further back into the fuel system.. guess ill go pick up a guage tommarow and look into it maybe the filter is plugged or somthing.. starting too get a big frustrating

 

By BOV you mean blow off valve, do you have one or do you have a bypass valve?

Is this what you have? http://images.google.com/imgres?imgu...l%3Den%26lr%3D

Now at idle if you disconnect the downtube that runs back to the SC intake from the bypass valve air should be rushing out of it, see google pic if you are not sure which end is the outlet. If air is not coming out of it you:

A. have no vacuum, ie huge vacuum leak, did you cap off the TB pcv port? And all other ports

B. Have a bad vacuum source.

Did you get the installation guide from powerdyne yet?


And for you junkies if you click on the site you'll see the orginial Bosch 108 had less piston travel/less flow than the newer 110,114,710n. And the 108's had softer springs which would have leaked more boost.