98 TRD 3.4L Turbo , Methanol , LT

You have 4runner ECU? Hmmm.... Should be the same. You have a laptop? I got an old netbook for $50 of CL (you will need this to tune the AEM in your truck).

Use it to help during installs (don't mind if it gets dirty or beat up). You'll need something to interface with the AEM while you drive.

 

Yeah, I got a good laptop. Fic is already mounted in the glove box. Going to download the software from aem. I just ordered the boomslang ready to go. The company told me they have done hundreds of tacomas and assured me it has resistors and is completely plug and play. I shouldn't worry about a thing on it for $400 know what i mean. So once that comes in I can start tuning. I'll most likely need some tips on tuning and all that. My understanding is you try to zero things out

 

You tuning primary or secondary injectors?

 

Primary only. Got 440cc injectors. Walbro 255. Bigger adjustable fpr although was told it is not necessary.

 

Might want to find someone local that can... Im a little fuzzy on closed loop and injector pulse width tuning.

 

Tuning isn't cheap.......turbos aren't cheap. Haha!

 

The stock injectors can and will handle 4 psi all day long at 11~ AFR with the FPR hooked up to a boost reference if all other variables are correct (like MAF and O2 signals). Slightly lean running will not cause the truck to buck and jerk a mile above see level at 4 psi and less. I've been there done that for longer than I'd care to share. I suggest you get it running perfectly at the stock spring rating (4 psi) and worry about AICs and wiring once it's reliable. Closed and open loop transitioning will always be a little rough without tuning but WOT pulls should not buck or hesitate if your injectors are clean, the spark is strong and all of the sensor signals are accurate. Just my two cents... don't want your truck to break down for something simple.

 

Great advice!

Funny you said that because I went into wot today with no problems. Smooth and fast. Between new plugs (cheap copper) gapped at .036 and new plug wires, 91 octane pump gas, and tightening the headers down the boost is unimaginable. I even power shifted from high boost right into high boost. Power is frightening compared to stock.

Completely different truck. Even driving slowly there is more pedal.

 

aem water methanol failsafe



440cc injectors and bov coupling.

It's been stressed upon me several times that especially with a manual you want to run a bov. I don't want to damage, or possibly damage my investment so I'll be putting in a bov.

 

The cx Kit doesn't have a BOV?? Wtf..

 

It does, I don't think he got the kit though. Its cheap, I didnt use mine.

The surge pressure on the bearing is equivalent to only about 1 PSI more than your boost pressure when you take your foot off the gas. IE, if Im running WOT at 8PSI, and take my foot of the gas, the spike in pressure from the surge will be equal to the pressure of running at 9-10PSI. I guess if you are running high boost on your turbo you might want one

Its on compression surge that kills turbos.

 

Aem fic 6. Pulled the kit out of my glove box until the harness arrives. Boomslang said about 1 week. I don't want to but the glove box is going to be the best location for mounting.



140 psi fpr and gas struts to lift the lids of my bed boxes.

 

Tundra brake kit from callahan. Has the 13wl calipers (bigger caliper and pads).

 

Nice dude!!! Glad you're taking the bull by the horns and getting stuff done!
I've seen guys boostin close to 30 psi with no BOV in their supras and evos with no problems at all, but I get where the concern comes from. And Just an FYI that ACM unit should fit perfectly either behind one of the side kick panels or under the carpet where a passenger's toes would go (right under the glove box against the firewall). That's where I have my split second unit (that still isn't hooked up).

 

Got my new super fake hks bov. For $40 it will do what a real $250 one will. (I hope?)

 

Yeah, good idea. I was thinking on top of the computer in the bottom center of the dash under the ash tray/stereo area. I'll have to see what happens with the boomslang harness first. I really don't want to lengthen that thing by any means.

Getting a little hesitation in wot. Might be slightly starving for fuel. Wot afr's are at 13. Boost gauge reads up to 11psi at times. Not sure why, my spring is only 4psi. Still needing to tune my ebc better. I'd like to know more about wg duty cycle and gain.....???

 

Those AFRs alone won't cause any hesetation at 4psi with an intercooler like yours. I'm going to guess MAF location, because I experienced a very very minor hesitation every so often with the MAF post turbo in front of the timing belt.

 

Electronic Boost Control Solenoids
A solenoid is a simple valve that is mechanically opened (or closed) when battery voltage is applied to it. This is done using a coil winding surrounding a ferrous metal actuator. The battery voltage passes through the coil and causes a magnetic field which moves an actuator that pulls open a valve. Typically these are setup to bleed air from the hose going to the wastegate actuator. Keep in mind, the solenoid doesn’t work as on off as describe, in fact the valve is turned on and off very fast to vary the amount of pressure bled from the hose. The speed and length the valve is opened, effects how much pressure is being bled off thus effecting boost. This process isn’t self contained in the solenoid, but rather driven by the ECU (engine control unit) in your car, or sometimes by aftermarket controllers.



This above diagram shows a typical solenoid used for boost control at rest and also with voltage applied to it. The blue represents the coil that when engergized creates the magnetic field. The Green represents the ferrous metal, the red represents the valve being actuated and the orange arrows indicate the air flowing.

As mentioned above, the speed and length at which the ECU turns the solenoid on and off, effects the amount of air being bled and when the wastegate actuator actually opens. The ECU produces this pulsing (on and off) signal in based on tables in the ECU and many calculations. This pulsing signal is commonly known as the wastegate duty cycle. This duty cycle is a percentage of how long the solenoid is open for a given time. Because the solenoid can open and close only so fast, it has a normal operating frequency. The frequency is how many times it can operate in 1 second, referred to as hertz (not the rent a car company). Typically solenoids work in the 10-30hz range, but this is not what the ECU is changing to increase boost. Back to the duty cycle. The duty cycle is a calculated a percentage of time the solenoid is actually open. Meaning 50% DC (Duty Cycle) means the solenoid on for 50% of the time, and 100% means the solenoid is on all the time. The more time the solenoid is on, the more air is bled from the system, and in turn the longer the wastegate is delayed from opening.

Found this ^^^^^^^^^ that helped me out a lot understanding wgdc.

Mine has been set at 0 because the manual said to start there. No wonder all I heard was a crap ton of wooooshing from my dump tube. I will toy with the value to keep my wastegate closed better. Could also be why my psi was fluctuating all over the place. The turbo was trying to make boost while dumping immediately from the wg.

 

Yeah that makes sense. Keep in mind too that your boost controler is going open up the WG way before your boost gauge reads full boost because there is higher pressure in the charge pipes than the post TB intake mani

 

I think mine reads from a map sensor post tb. I did also tap vaccum into the turbo running to the wastegate which is electronically controlled.

Finally got my boost and methanol working much better. Running the methanol off of the tps sensor. Running off of the tps because you do not need to inject at lower speeds or while not in boost. Ebc is adjusted way better, still needing fine tuning. My afr driving normally stays around 15, while boosting gets to 11.7 to 13 range with the methanol.



boomslang harness.