Yes autometer the hoses are t d together and then the end that would have been hooked to the solonoid is plugged . My friend said that all I was getting was spring pressure .but the way I think this works is the boost pressure from the compresor side is holding the waste gate closed , so I'm basically getting all the turbo will put out ......witch in this case is 15 -16 pounds .now unless I'm mistaken the waste gate opens when pressure in the exhaust housings is greater than the boost pressure comming out of the compressor. Please correct me if I'm wrong .I'm not really worried about the 15 16 pounds it's making the modification s are 340 lph walbro adjustable fpr 36#injectors headstuds lockwires cold air kit aftermarket headers downpipe dump pipe 2.5 exhaust and a chip ,the chip said 36# injectors 17# 93 octane @20 degrees .now keep in mind this car has set for 15 years till I got it and I'm just trying to get it going ,.I've changed tank fp fp hanger plugs bunch of rotted vacuum lines and oilchange . I thank you for your help
.................It never ceases to amaze me some of the bastardizations that can occur to these cars along the way.
Dave thank you for your reply now that k think about it it actually is a y I guess the point I was trying to make was that they are just connect ed together .just so I understand if I hook up the wast gate I will make the amount of boost called for by the ecm is thi correct ?if my chip said 17 or 18 pounds the waste gate solonoid will make the turbo produce more Boost thaan what the wast gate is set for .? Man now I'm really confused .Your assumptions are totally incorrect. Your turbo is capable of a LOT more than 15# of boost if uncontrolled. The pressure coming from the compressor housing is what is applied to the wastegate actuator, and once the internal spring pressure is overcome (usually between 12-15# depending on the spring) the waste will be forced open and hold boost at that pressure. The solenoid (the device disconnected on your setup) is actually used to raise boost over the wastegate spring, and is controlled by the ECM.
Now, the question is..... Is there an actual "T" in the boost control hoses or is it shaped like a "Y".
It never ceases to amaze my some of the bastardizations that can occur to these cars along the way.
Dave thank you for your reply now that k think about it it actually is a y I guess the point I was trying to make was that they are just connect ed together .just so I understand if I hook up the wast gate I will make the amount of boost called for by the ecm is thi correct ?if my chip said 17 or 18 pounds the waste gate solonoid will make the turbo produce more Boost thaan what the wast gate is set for .? Man now I'm really confused .
OK Dave I will do this when I get homeYes, true. However, if the wastegate actuator has an adjustable rod (very likely), that could add/subtract a few #'s from what the chip is commanding for boost.
Unplug that disconnected hose and hook it to one of the empty hose barbs on the solenoid. Leave the other barb open to atmosphere.
Yes it's adjustable it won't go below about 45#The hose from the turbo wast gate goes where ? I mean what is it hooked to.I hope not the boost gauge
you are controlling boost some how .
I set FP @43# with the vacuum line of at idle ,dose it have a adjustable FP regulator?
No there is not treads on the waste gateOk. I started glazing over this, but here's a question. Does your wastegate actuator have threads and a nut on it for adjusting the length of the arm that connects to the puck on the turbo? If so, then that is how boost is being controlled. The shorter the arm, the higher the spring pressure, and the more boost it takes to open it. This is how we controlled boost back in the old days. In that case the solenoid is bypassed. You need to figure out what chip you have in order to see what boost the ECM is set to.
Best not to hook it back up for now if you are manually controlled by spring pressure. Worst thing that will happen at this point is your spoolup will be a little slower.