Why the 914-6 Floor Throttle Lever?, ....just askin'! Options

[Tom_T]

Not a Sixer myself, but just curious as to what the purpose was for providing a floor mounted throttle lever within inches of the gas pedal on the 914-6s?? (IMG:style_emoticons/default/confused24.gif)

[r_towle]

Its a mechanical extra set of linkage that goes to the carbs.
It pulls on the carb linkage and its purpose is to allow the owner to hold idle at say 1500 while they wait for the car to warm up.
Once driving, you need to push it back down.

Rich

[Pat Garvey]

Its a mechanical extra set of linkage that goes to the carbs.
It pulls on the carb linkage and its purpose is to allow the owner to hold idle at say 1500 while they wait for the car to warm up.
Once driving, you need to push it back down.

Rich

Yeah Rich, it does that on carb's cars, as well as MFI and CIS cars. Helps a lot when it's working properly.

Back in the late 70's, I had a sporto 911E, and was living in Kentucky - working in Cincinnati. Came accross the bridge into KY at about 110 - KY trooper waiting! Stopped me about a mile up the hill. Told him I lived 5 miles away & the throttle was stuck. Just needed to nurse it home to fix it.

Looked at me dubiously & asked that I fire it up. Reached between the seats & pulled the lever up, started it, and the engine fired up to high rpm's. Shut it down quickly & told the officer "stuck linkage - I can fix it at home, but not here".

After a couple of minutes, he offered a tow. Told him it would wreck the front pan.

So, he told me to go home, but keep my foot on the brakes to keep the speed down, and turn the motor off & on when I got onto side roads. He followed me until I left the freeway, while tapping the brakes regularly to ease him.

Once I left the freeway, and he was gone, I drove the rest of the way at 30 mph.

True story!

I'll bet it would still work today. Who would know an old Porsche has a hand throttle between the seats?

Still don't understand why they have them on CIS motors - never used mine.
Pat

[Cap'n Krusty]

Its a mechanical extra set of linkage that goes to the carbs.
It pulls on the carb linkage and its purpose is to allow the owner to hold idle at say 1500 while they wait for the car to warm up.
Once driving, you need to push it back down.

Rich

Yeah Rich, it does that on carb's cars, as well as MFI and CIS cars. Helps a lot when it's working properly.

Back in the late 70's, I had a sporto 911E, and was living in Kentucky - working in Cincinnati. Came accross the bridge into KY at about 110 - KY trooper waiting! Stopped me about a mile up the hill. Told him I lived 5 miles away & the throttle was stuck. Just needed to nurse it home to fix it.

Looked at me dubiously & asked that I fire it up. Reached between the seats & pulled the lever up, started it, and the engine fired up to high rpm's. Shut it down quickly & told the officer "stuck linkage - I can fix it at home, but not here".

After a couple of minutes, he offered a tow. Told him it would wreck the front pan.

So, he told me to go home, but keep my foot on the brakes to keep the speed down, and turn the motor off & on when I got onto side roads. He followed me until I left the freeway, while tapping the brakes regularly to ease him.

Once I left the freeway, and he was gone, I drove the rest of the way at 30 mph.

True story!

I'll bet it would still work today. Who would know an old Porsche has a hand throttle between the seats?

Still don't understand why they have them on CIS motors - never used mine.
Pat

They are installed on CIS engines because that's how you activate the cold idle enrichment function. The shops were, in the past, littered with 911s with exploded airboxes because owners didn't use the hand throttle. (That's what prompted my friend Jan Bieren to invent the cool little Backfire Pressure Relief Valve you see on so many CIS cars, mostly on replacement airboxes ...........). BTW, the hand throttle has to be calibrated in order to work properly. Seems to me it first appeared in 1969, with the introduction of MFI. Later CIS cars use a temp sensitive mechanism for cold idle enrichment, and it IS NOT the same as the cold start enrichment circuit, which is controlled solely by the thermotime switch and starter activation.

The hand throttle simply pushes a little block clamped to the throttle rod (911s don't have a throttle cable). The location of that block is adjustable. If they were to have mounted the hand throttle on the dash like a choke pull knob, there would be a lot of monkey motion levers, cables, and connection pieces added to the mechanism. Simple most often is best, and this elegant system was applicable to carbs, MFI, and CIS, over nearly a decade. Now you know.

The Cap'n

[Pat Garvey]

Its a mechanical extra set of linkage that goes to the carbs.
It pulls on the carb linkage and its purpose is to allow the owner to hold idle at say 1500 while they wait for the car to warm up.
Once driving, you need to push it back down.

Rich

Yeah Rich, it does that on carb's cars, as well as MFI and CIS cars. Helps a lot when it's working properly.

Back in the late 70's, I had a sporto 911E, and was living in Kentucky - working in Cincinnati. Came accross the bridge into KY at about 110 - KY trooper waiting! Stopped me about a mile up the hill. Told him I lived 5 miles away & the throttle was stuck. Just needed to nurse it home to fix it.

Looked at me dubiously & asked that I fire it up. Reached between the seats & pulled the lever up, started it, and the engine fired up to high rpm's. Shut it down quickly & told the officer "stuck linkage - I can fix it at home, but not here".

After a couple of minutes, he offered a tow. Told him it would wreck the front pan.

So, he told me to go home, but keep my foot on the brakes to keep the speed down, and turn the motor off & on when I got onto side roads. He followed me until I left the freeway, while tapping the brakes regularly to ease him.

Once I left the freeway, and he was gone, I drove the rest of the way at 30 mph.

True story!

I'll bet it would still work today. Who would know an old Porsche has a hand throttle between the seats?

Still don't understand why they have them on CIS motors - never used mine.
Pat

They are installed on CIS engines because that's how you activate the cold idle enrichment function. The shops were, in the past, littered with 911s with exploded airboxes because owners didn't use the hand throttle. (That's what prompted my friend Jan Bieren to invent the cool little Backfire Pressure Relief Valve you see on so many CIS cars, mostly on replacement airboxes ...........). BTW, the hand throttle has to be calibrated in order to work properly. Seems to me it first appeared in 1969, with the introduction of MFI. Later CIS cars use a temp sensitive mechanism for cold idle enrichment, and it IS NOT the same as the cold start enrichment circuit, which is controlled solely by the thermotime switch and starter activation.

The hand throttle simply pushes a little block clamped to the throttle rod (911s don't have a throttle cable). The location of that block is adjustable. If they were to have mounted the hand throttle on the dash like a choke pull knob, there would be a lot of monkey motion levers, cables, and connection pieces added to the mechanism. Simple most often is best, and this elegant system was applicable to carbs, MFI, and CIS, over nearly a decade. Now you know.

The Cap'n

Kruster,

Look, I know this could be construed to be, well hell it is, non-original text. But since we have it started....

Many teeners have CIS motors in their 914s. How is this hand throttle calibrated ?
Pat