Many Question for my Ongoing project

[bmxboy809]

thats what i was running before i did the swap. sounds good that is prolly what i will go with. Did you take yours to an exhaust shop to have it bent up or did you do it yourself?

 

[scotts90ranger]

anyone tried the thrush welded mufflers on one of these? I can get them cheap through work and figured I'd go that route... I know the one we use on our dyno sounds pretty good, but we just run N/A for the most part...

 

[bmxboy809]

ok so i took my ranger out for a test drive the other night now that i have the iac wired correctly. the boost got up to over 15psi. as far as i no the stock waste gate should open at 10psi but clearly this did not happen. Also i have a type RS blow off valve and i dont think that opened either. The hose on the top side of the valve is supposed to be on the vacuum side right?

 

[RangerFabWorks]

no the top side is the relief vavle, on the blow off vlave, there should be a vacumm on the side of it.

i hope your using a recirculating valve instead of an atmospheric blow off valve

 

[bmxboy809]

this is the valve that i bought on ebay. This is a knock off of a GReddy type rs. It does vent to the atmosphere and i know they are inefficient but that is not my question. We put pressure on the inlet at the top and nothing happened so we thought vacuum opened the diaphragm and that is how it new the throttle was closed. Does the valve open up into the body or down out?

 

[mini274]

the valve opens up by vacuum the sudden change in pressure sucks the piston open and relieves pressure when its under boost the boost pressure helps hold it closed.. i do have to tell you my friend has one of these on his ranger and his does not work properly does not open all the way spring is too stiff it lets the charger backspool which will cause problems in the long run

 

[bmxboy809]

ok thanks. i am trying to adjust it right so that it opens but so far i havent been able to get it to. What kind of bov do you suggest? I can afford 300$ for something as small as a bov. also i have no intercooler currently and am just using the stock pipe between the turbo and the tb which only has a 3/8in NPT opening in it. Thats why i have the flange mount style valve so i could make a plate to adapt it. So without having all the intercooler piping what could i do?

 

[scotts90ranger]

run with just the wastegate... that's how I'm running, and how it was designed to run so it does work.

 

[bmxboy809]

what do you do to keep the turbo from stalling? that is pretty important. the waste gate only stops it from compressing but does not let the pressure out of the intake. They WERE NOT designed to use just the waste gate anyways. they were designed to vent through a system with the PCV. If you dont vent the pressure on the outside of the throttle plate you are wasting power getting the turbo spooled up again. And as i said earlier my waste gate is not working because my gauge has snown more than 15 lbs of boost. If I cant keep the turbo spooled up when i close the throttle i am losing major power at lower RPM.

 

[Davis]

Actually, no, in stock configuration they didn't vent.

That's not to say that it isn't important, but these turbos are just fine at 10 lbs with no vent, and can get away with 15.

 

[bmxboy809]

sorry i have been misinformed then. what was the boost pressure solenoid? i checked out the shop manual diagrams and there was a line which ran from the same port as the waste gate and went to the boost pressure solenoid and then to the PCV. This looks like it was the stock pressure vent. These really ran with no bpv? What was the stock wastegate pressure on the 86 merkur? It cant be higher than 15 can it?

what i have:
88 tc motor
no intercooler installed
86 merkur turbo
the thunderbird was a manual tranny


i have been running it with the IAC unplugged, the idle is still adjusting so that means the computer is advancing/ retarding the timing right?

also what should the exhaust gas temp be? mine is from 800* at idle to about 1150-1200* reved up.

does the stock ranger fuel pressure regulator work under boost?

 

[Davis]

The BCS is the Boost Control Solenoid. It controls the Cylinder Air Charge. That is a roundabout way of saying it controls how much air gets into the engine. Technically it doesn't control boost because the ECU doesn't even know what the boost pressure is, as it doesnt have a MAP sensor. However, the VAM measures the airflow and on a stock motor, the airflow allowed by the BCS comes out to be 15 lbs on certain turbofords (generally the intercooled ones) and 10 on others.

The BCS should be routed to the wastegate and the turbo outlet or intake manifold, I'm not sure which.

I have no idea on the EGTs, I've never run a probe, but that sounds fine. It shouldn't really get over 1500 when under full load though.

And yes, the ranger FPR works just fine under boost.

 

[bmxboy809]

How does the Fuel pressure behave on your ranger under boost? When i get above 2-3lbs the pressure is all over the board. I had a feeling this was the case since the motor seemed way under powered. If you are running the stock regulator do you have to change out the pump. I have both the stock pumps running now but i was wondering if i should remove the in-line pump and run a walboro in-tank pump and increase the flow. Also do you run the stock fuel filter, or did you upgrade to a less restrictive one? I finally got my bov to work but now i am finding out that the a/f mixture is leaning way out under boost. Has anyone made/bought an adapter to replace the stock fpr with an aftermarket one and still use the stock fuel rail?