st 204 turbo Options

[thorshammer]

Hi I have a st204 Celica with 5fse engine and am wanting o turbo it. I have read 1bwilson's and Shid's posts on turboing a 5sfe and list of components needed and this seems to be the best way to go. In my neck of the woods CT26 turbos are hard to come by, T3/T4 turbo is easier to sourc.e My question is what T3/T4 do I need and other than a CT26-T3/T4 adaptor is there anything else I need. I live in Australia so Mustangs and other American cars are not common here but plenty of Japanese sources. Thanks

[lagos]

You can use the 98+ head too. You just gotta put all the electronics from yours into the newer engine. The crank angle sensor can be left unplugged into any ECU but installed onto the engine for later use with the megasquirt, yes.

Can't you just use the crank angle sensor inside the distributor on a 5sfe?
I know some 5s models came with an actual crank sensor, but on the 3sgte we take both crank (NE) and Cam (G1/G2) from the distributor.

[Syaoran]

You can use the 98+ head too. You just gotta put all the electronics from yours into the newer engine. The crank angle sensor can be left unplugged into any ECU but installed onto the engine for later use with the megasquirt, yes.

Can't you just use the crank angle sensor inside the distributor on a 5sfe?
I know some 5s models came with an actual crank sensor, but on the 3sgte we take both crank (NE) and Cam (G1/G2) from the distributor.

It requires a few modifications to use (particularly installing a Zeal Dual VR conditioner board.

Taking measures from the crank directly is way more accurate than having the ECU translate the cam revolutions into crank revolutions, since what it actually needs is crank position and not cam position. (cam position is only necessary for sequential ignition if I'm not mistaken, and really only one tooth is necessary, you don't need a trigger wheel on the distributor for COP ignition if you have a crank angle sensor with a trigger wheel mounted on the crankshaft itself.)

Believe me when I say it works much, much better with the crank sensor than the distributor from the 5S. I don't know if you've ever seen one on the inside, but the distributor on the 5S has a weird trigger wheel, it's not exactly a trigger wheel like the conventional ones (36-1, 36-2, 60-2, 24-1 etc)

Besides, distributors aren't better than the wasted spark coils that the 98+ Camry engines have. They put out more energy than the stock distributor ignition coil, too, and there's absolutely no chance of interference from the magnetic field generated by the coils since the crankshaft position sensor is down there, and the coils are all the way up here.