Toyota MR2 Kinner radial (R55 Airplane engine) with decent idle and startup

[longwing110]

what starter motor? an old aircraft one, or something newer adapted to work?

[Frankenstein00000]

@longwing110 In that video i'm using the stock 1993 subaru starter driving through the reduction gear. the start RPM is 20-25 which has proven to be a problem over and over.

I'm working on adapting a cummins turbodiesel starter on it. the start RPM is now about 450RPM. i haven't fired the motor with that new setup yet, but it should start at the flick of the switch now.

the long delay between the start of the rotation and the first fire is the computer waiting for synchronization.

[Frankenstein00000]

@Frankenstein00000 as soon as the computer sees two rotations it fires the next cylinder possible and it almost always catches on the first shot.

[diyefi]

@Frankenstein00000 What type of crank angle sensor does it use? Is there a thread somewhere where I can read more about it?

[Frankenstein00000]

@diyefi the sensor is a kia cam position sensor, i forget exactly which. it's a hall effect sensor.

[Frankenstein00000]

@diyefi the reason i selected that sensor is becuase of it's extreme low RPM stability. as you can see, the engine starts with a cranking speed of about 20-25rpm. i did have to lie about the advance position to get it to have a start spark position after top dead center.

[diyefi]

@Frankenstein00000 OK! What about the pattern that sensor reads? The wheel configuration? Whatever you want to call it :-) Tell me more about that, please.

[Frankenstein00000]

@diyefi sure, the crank sensor is a 40-1 and is directly on the crank. the "cam sensor" is also on the crank, the alternator is driven by a chain that has twice as many links as the crank sprocket and one of the links has a tab that sticks out. i can send you a picture if you e-mail me: Marc at frankensteinmotorworks

[Frankenstein00000]

@Frankenstein00000 period com missing from the e-mail address

[davetileguy]

Why?

[Mayo07J]

You forgot to clear the prop, that's very unsafe.

[aggie46]

I suspect you are going to need some cooling air over the cylinder jugs before you are done...

[slammedcrx]

i cant wait to see it drive!!

[Frankenstein00000]

@dave97202  a few more days. it's almost there.

[jdanfosho]

This thing will be a beast when it's done.