Re: chipping toyota ecu
 

I've seen JET chipped OBD2 ECUs - equipped with the OEM OTP MCU with factory code dump label on it. Wonder how many JDM horsepower that gave them?

Dougie from Hyundaidata (I think?) showed me a picture of a JET chipped OBD1 Civic ECU... without the J1 jumper installed. Amazing company!

Early Toyota EFI was a licensed version of Bosch Mo or Jetronic. LH-Jet, I think?? In that case, you probably have a very simple ECU to molest if it's anything like the BMW, Volvo, Audi variants. Very easy as in those are crude, simple ECUs with commonly available MCU tools, for an electronics/coding DIYer to play with.

Re: chipping toyota ecu
 

how exactly does megasquirt work i checked otu their page, how do you intall/tune it?

thanks

Re: chipping toyota ecu
 

Probably be more helpful if you asked them...

But basically, you get all the parts, build the ECU, install it in your car (rewire if necessary) and tune.

Re: chipping toyota ecu
 

Mill out your intake and place bungs for 4 DSM 450's right behind your factory injectors on another 4AFE fuel rail mounted backwards from the first one. Take out your FPR and tap the hole to make a feed for the other rail. Use the FPR on the second rail and locate on the driver's side where the return pipe that runs under the manifold comes out and hook up a 1:1 regulator on the return there. Should be just fine with a cheap-ass AIC or auxilliary injector controller. Fuel pump runs out of breath over 12-13 psi. And you better get a BTM or somehow pull a -----ton of timing of you will blow your engine all the ------- time. Also, don't forget that if you for some reason continue development with a 4AFE, you CAN use a 4AGE head gasket, so get a fattie one. Good luck!

Re: chipping toyota ecu
 

ohp well turbo project went to crap just ui threw a rod bearing with it n/a, haha thanks eveyone for the help though, this sucks. looks like im going to swap out the bottem end for my 4agze bottem end a litle sooner than i thoght