proxlamus©

Hmmm.. i was talking to Rboyd (loose screws) who used to be a member on here who actually had Megasquirt and a functional Boost control... he had a bad FET injector driver.. and it locked the injectors open (e.g. grounded them) Soo I could simply have a bad FET! I guess they fail often.

was that in Colorado Yasin?! I gotta see this!

boy Phil... our cars are getting WAY too similar.. LoL

I did not.. I am still running 021u.. maybe upgrading the MS version might help.. any ideas on how to test the FET?

Sorry guys. i've given up.. I have tried EVERYTHING I double checked.. and tripple checked and quadrople checked the wiring .. everything is correct.. just the damn thing is NOT working. I can only assume its a bad FET or a bad X4 output.. which is nearly impossible to measure due to the pulsewidth modulation. So maybe I will order a new FET.. but i've given up.. trust me when I say i have tried everything..

Ok.. I learned that the mounting tab.. connects to the DRAIN tab.. so DO NOT MOUNT THE FET TO METAL or use a metal screw! The point of MS is to close the signal and create a ground for the DRAIN. Closing the drain closes the valve. If you ground the tab, the drain is closed, so the valve is closed, which closes the wastegate, which results in overboosting. Now to get the damn thing running properly and work with my tables

soo the mounting tab should be grounded.. and is connected to the DRAIN?! that doesnt make sense... because Megasquirt is supposed to ground the valve.. closing the ground closes the valve. an open ground opens the valve. But if the drain is grounded to the Megasquirt unit through the metal mounting tab.. than the drain is always grounded.. and Megasquirt is not controlling the ground.

http://www.irf.com/product-info/datasheets/data/irlz44n.pdf This is the data sheet .. any electrical guru's out there?! Is the metal mounting tab connected to the (S) Source pin?!

Funny... I attached the FET to a piece of plastic.. and the FET has a metal backing.. maybe it needs to be grounded .. LoL Now the FET is grounded and now the valve is closed.. neat.. but now its STUCK CLOSED and I am overboosting.. I have the boost table set to ZERO! and its still closed! WTF Pete I am running 021s right now.. I've checked the wiring about 20 times and I can't figure this out.. grrr!

after thinking long and hard... ive concluded that the valve is stuck OPEN right now and allowing the boost to open the wastegate .. which allows me to run stock boost (6psi) I tested the unit by blowing in it with the GM Valve with a loose ground.. and I could blow through the valve and feel the air out the other side. Once I attached the ground.. the valve closed which is good. I take off the ground and it opens back up. Sooo.. that means that the valve is not grounding.. and the valve's ground leads to the DRAIN pin on the FET. ** Does the SOURCE (ground) of the FET have to be grounded to the Megasquirt unit or can I ground it to the chassis?! ** Does the voltage coming out of the X4 output on the Megasquirt unit close the connection between the Gate and Drain, which causes the grounding?!

By the way once I get this thing working properly.. I will be posting pictures and the cure to my problem

Well.. Today I installed a boost controller.. This picture shoes the FET. -[GATE] Pink wire goes to X4 Gate (connected to source wire using 10k resistor, then a 100ohm resistor inline) -[DRAIN] Black wire goes to X12 (or just run straight to valve. X12 runs out of the DB37 connector on pin 27) -[sOURCE] Blue wire goes to the D1 pin. D1 is a confirmed ground. (I eventually moved this to a fixed ground point on the Megasquirt case and grounded the case to the chassis) Excuse the messy electrical tape. Behind the tape is the resistor inline from the GATE to the SOURCE. This shows the pink wire (GATE) to the X4 pin This shows the blue wire (SOURCE) to the D1 ground pin This shows the black wire (DRAIN) to X12 output ------------------------------------------------ This is how the unit is hooked up - Gate (pin1) goes to X4. I connected it to the "source wire" using a 10K resistor, then after that I installed a 100ohm resistor inline (pink wire) - Drain (pin2) goes directly to the input on the GM fast acting valve. (Rather than connecting the wire to X12 and wiring out of the DB37 I just ran the wire straight to the fast acting valve.) (black wire) - Source (pin3) is grounded to the chassis and MS case. Also has that 10k resistor to the "gate wire" (blue wire) This shows the connector with a "1N4002" diode between the two wires at the plug to filter out voltage spikes. Cathode (bar) goes to the positive. Shows the hook up and hoses. Now I have been messing with the settings like crazy. I have tried all of the Solenoid PWM rate.. ranging from 39hz all the way to 5hz I have the controller update (ms) set to 10ms Proportional Gain % - I have tried from 50% to 90% no luck Differential gain I tried the default 9.8 and then even dropped to 0. Increase voltage = Increase boost (i want to run open loop with the boost duty target table) Now on my boost duty target table.. I have tried as low as 20 and as high as 90 all the way across the board.. Nothing. I can hear the GM fast acting valve working and ticking.. and when I rev the engine and quickly ground the Fast acting valve the valve opens up and I can hear air venting. My wastegate is factory set at 6psi.. I used a manual boost controller and had it set to 15psi. WHY oh WHY can't I get this setup to work?! the X4 output is selected to boost control and under boost the "output 1/boost control" turns green on Megatune.. so I know its sending a signal.

its been around in turbine jet engines for decades... wonder why it took so long to move onto turbochargers

omg everything is so beautiful

http://forums.hybridz.org/showthread.php?t=117388 This link has lots of info on cams.. and a breakdown of what is "listed" available. s/o cams are awsome too

DDAAAYYMMMM Yasin your really movin on that car!! its goin to be a hell of alot faster than mine =( sigh I have some work to do

http://www.mig-welding.co.uk/aluminium-welding.htm this is an excellent link about MIG welding aluminum

Ok.. WEIRD problem.. I've been running the innovate setup disconnected from Megasquirt to prevent it from pooping out.. today I installed a 1/4 watt 470ohm resistor.. and my guage is showing one thing... Megasquirt is showing something way different.. for example.. my Innovate Guage displays 15.6 AFR Megasquirt displays 14.2 AFR When the wire is hooked up directly.. life is good, perfect match When the resistor is hooked up.. life is not good, NO match any idea's?! I do have an older version of the Innovate box, and I dont want to fry it!

metal?!? I would say NO! if you detonate.. the head gasket will blow and save your engine with metal, you detonate.. and there is no where for it to go, other then through the piston or out the side of the block. My fel-pro has handled 18psi fine

much better pics now Austin oh yeh.. 2.5" or 3" now?!

bad ass man!! glad to see everything is working out for ya! and now your rolling in the cash!

cool. thanks man!

well.. today I torqued them to spec and noticed something interesting.. the holes in the lifters did NOT line up with the holes on the head... hmm.. i wonder if each lifter has its own "home"... since I converted over to solids then BACK to hydraulics.. they were in a box.. and were not placed exactly in the same spot. Is each lifter different?! like a different thread start, or different depth or something?! I used a sharpie to mark the lifter to see if it lined up.. hmm

lol 17psi and stock half shafts and dumping the clutch?! umm bad bad bad idea

I really like these... I want to try them out.