EFI project has started Options

[mb911]

Just a quick update. MFI to EFI bungs are in and will be using the carbs will just be throttle bodies and port injection.

Have at those questions

[914_teener]

Why not just keep the MFI?


I always thought it was genious.

[ClayPerrine]

Why not just keep the MFI?


I always thought it was genious.

I had a 2.4L MFI motor in my 914-6 conversion for a long tme.

The performance is great, and the sound is GLORIOUS!!!

But to live with MFI on a car you want to be a daily driver, not so good.

Typical morning startup from dead cold on a day below 40F.

Get the can of ether and spray it into the air cleaners on both sides.

Attempt to start the car. It sputters and dies.

Repeat.

Repeat.

Around the fourth time it will catch and run badly on 4 or so cylinders. So set the hand throttle to 1500 RPM to let it run for a while.

As it warms up, it will start firing on the rest of the cylinders. Ease the hand throttle down slowly as the RPM increases to keep it at 1500 RPM.

Once the engine is running smooth on all six and the oil temp starts to come off the peg, ease the hand throttle down until it idles at 950RPM.

Now you can back out of the garage and drive gently for a while until the rest of the chassis and drivetrain warm up.


Contrast that to EFI.

Get in car. Turn key. Car starts and idles on all six cylinders. Wait about 30 seconds and back out of the garage. Drive gently until the engine, transmission and chassis warms up.


To be completely transparent, I never connected the MFI cold start fuel enrichment system. They were nicknamed "the firestarter" for a reason. I have seen the stacks catch on fire because of a backfire on cold start. No Bueno.

[914_teener]

Why not just keep the MFI?


I always thought it was genious.

I had a 2.4L MFI motor in my 914-6 conversion for a long tme.

The performance is great, and the sound is GLORIOUS!!!

But to live with MFI on a car you want to be a daily driver, not so good.

Typical morning startup from dead cold on a day below 40F.

Get the can of ether and spray it into the air cleaners on both sides.

Attempt to start the car. It sputters and dies.

Repeat.

Repeat.

Around the fourth time it will catch and run badly on 4 or so cylinders. So set the hand throttle to 1500 RPM to let it run for a while.

As it warms up, it will start firing on the rest of the cylinders. Ease the hand throttle down slowly as the RPM increases to keep it at 1500 RPM.

Once the engine is running smooth on all six and the oil temp starts to come off the peg, ease the hand throttle down until it idles at 950RPM.

Now you can back out of the garage and drive gently for a while until the rest of the chassis and drivetrain warm up.


Contrast that to EFI.

Get in car. Turn key. Car starts and idles on all six cylinders. Wait about 30 seconds and back out of the garage. Drive gently until the engine, transmission and chassis warms up.


To be completely transparent, I never connected the MFI cold start fuel enrichment system. They were nicknamed "the firestarter" for a reason. I have seen the stacks catch on fire because of a backfire on cold start. No Bueno.

Yea....considering it was developed so that the Messerschmidt could fly upside down and for 6 G turns....sounds like the prestart checklist and magneto start up.....


But when it runs right......sheeeez. What a sound and unmatched performance.

914 DD....naw... keep the MFI for the sound if only.