throttle drive by wire

[swade]

I feel the flames coming already...

I am considering a EFI/TB setup and wonder if the cable-linkage-pushrod assembly could be replaced by a sensor on the pedal (or nearabout and an actuator between the throttle bodies?

I see that some ECU's have this incorporated into the box but i was thinking of a stand alone system that is independent of the box

Thanks

Wade

[FstTarga]

If you are going itb then you could find a set of itbs that incorporate drive by wire into them and then swap out the pedal for a gm floor mount or maybe Nissan or something. That would put the sensor on your pedal and the (pwm, or stepper I don’t know which) throttle motor on the itbs then it could all be done through whatever ecu you would be using. I’d attempt to avoid adding a whole second controller box for the throttle as that is just pointless complexity

[Ryan H]

Originally Posted by swade

I feel the flames coming already...

I am considering a EFI/TB setup and wonder if the cable-linkage-pushrod assembly could be replaced by a sensor on the pedal (or nearabout and an actuator between the throttle bodies?

I see that some ECU's have this incorporated into the box but i was thinking of a stand alone system that is independent of the box

Thanks

Wade

You'd have to buy the Jenvey units.

[pampadori]

The AEM infinity is able to run TBW. Makes things like traction control worthwhile so I'd also plan for wheel speed sensors.
If i could do it over again, i'd add a lot more connectivity to my setup. I would want dummy lights on the dash and speed input added to the ECU and some traction control would be good too. Unfortunately its too much fun to drive it now than work on it so I find myself not going back and making those improvements.

If you didn't got ITB you could surely make some modern throttle body fit whatever manifold you decide to run. Pretty much everything from the last decade is TBW now so the world is your oyster.

['76 911S 3.0]

You could use an E46 M3 BMW DBW actuator...it is designed to work with a linkage actuator...I have contemplated adding this to my car with the actuator mounted on the trans and connecting to the linkage for the throttle from there. That way it will keep the look of a cable throttle but have the modern DBW connected to it. Like Shaun stated before me, the Infinity can control the DBW and has already been proven to work with the E46 M3 DBW actuator.

[Trackrash]

I assume you have driven a car with one of these throttles? Not for me, thanks.

[swade]

Great replies all, thank you. Jason something like that actuator was what i was thinking.

Gordon please explain your experience that makes you negitive towards throttle by wire

Thanks all

Wade

[Tippy]

The beauty of incorporating into an EFI system, when coupled with a wheel speed sensor, could be great traction control

[Trackrash]

Originally Posted by swade

Great replies all, thank you. Jason something like that actuator was what i was thinking.

Gordon please explain your experience that makes you negitive towards throttle by wire

Thanks all

Wade

Maybe others with the new Porsches will chime in.

My '09 Dodge Charger w/ the 3,5 H.O. motor has the electronic throttle. It just adds a noticeable delay to the throttle response.

Hopefully others will chime in. Maybe its just this car?

[pampadori]

It's just that Dodge.
I think the actuators are capable of being faster than your right foot. I have driven an e46 m3 and it has what you would consider pretty immediate throttle response. But seriously, almost every car worth driving (I.e.not a Dodge charger rental car) has had pretty responsive dbw for the last 15 years. All the sportscars and all the exotics. Even the sport bikes have been dbw for a good decade now. Spend a Saturday testing some new rides out at a few local car dealerships and see just how good cars have gotten
I have family that is in law enforcement and they can't say enough bad things about those chargers from that time frame. The crown vics we're loads better.

['76 911S 3.0]

Originally Posted by Trackrash

Maybe others with the new Porsches will chime in.

My '09 Dodge Charger w/ the 3,5 H.O. motor has the electronic throttle. It just adds a noticeable delay to the throttle response.

Hopefully others will chime in. Maybe its just this car?

With an aftermarket ECU you control the throttle curve. You can make it 1:1 pedal vs. throttle blade or have it ramp in gently for torque management. Nothing at all like the dampened OEM throttle demand curves, or as I like to call it, “torque request pedal.”

[al lkosmal]

It's a cool thought and I really like to try out new ideas (EFI/ITBs for example) on our old 911s.....But.....TBW makes sense for new designs, as it eliminates the packaging issues associated with mechanical throttle actuation......and traction control is a good thing, I guess, for monster horse-powered cars......but, if this is for your 1972 Targa, that already has throttle linkage and EFI/ITBs, all of which have throttle linkage.......what would the benefit be, beyond the cool factor? Don't get me wrong, i like the cool factory too........but, and it's a big butt.

regards,
al

[swade]

Hi Al,
No not for the 72. In a trade i ended up with a Motec M48 and a VarioRam intake and am ruminating on what to do with them with another trade item a 3.2L motor, and was wondering if there were any stand alone DBW pedal/actuators. Seems like many of the newer ECU's have this built in but not the M48. Might just sell the items off. It's still winter here and need a project in the shop.

Wade

[Evan Fullerton]

I hate DBW on old cars from a philosophical point of view but they do offer a lot of features and make part throttle dyno tuning WAY WAY easier. Early 996 gas pedals have a cable that comes out of them that runs to a remote position pot. One of these hacked up and hidden combine with the e46M3 actuator can make a very clean and "hidden" DBW setup.

[Raceboy]

I already did it though just tested it on the bench for now. Used E46 M3 throttle actuator and E46 pedal with GSXR1000 throttles. VEMS ECU controls it.

[DSPTurtle]

Reviving this old thread... has anyone found a standalone unit to do this? I adapted the 3.2 intake to fit a 74mm 996/997 throttle body. I'd like to use a 996 pedal but not sure which computer to put between them. I plan to use the M84 for engine mgmt but was thinking of a simple, second system for the DBW. Not too worried about traction control

[Peter M]

Originally Posted by DSPTurtle

Reviving this old thread... has anyone found a standalone unit to do this? I adapted the 3.2 intake to fit a 74mm 996/997 throttle body. I'd like to use a 996 pedal but not sure which computer to put between them. I plan to use the M84 for engine mgmt but was thinking of a simple, second system for the DBW. Not too worried about traction control

Interesting build JB, is it going to be NA or turboed? It would be interesting to know what the hp difference is between the 74mm and the std throttle bodies

Instead of a M84, why don't you just run a M130 that has integrated DBW capability, plus a bit more like wall wetting modelling? (but no cruise control option!)

As for the accelerator pedal, there are good suggestions here to keep the existing pedal but to install a position sensor:

https://porscheforum.com.au/topic/15418-my-carrera-32/?do=findComment&comment=301630

[gduke2010]

[QUOTE='76 911S 3.0;9934396]You could use an E46 M3 BMW DBW actuator...it is designed to work with a linkage actuator...I have contemplated adding this to my car with the actuator mounted on the trans and connecting to the linkage for the throttle from there. That way it will keep the look of a cable throttle but have the modern DBW connected to it. Like Shaun stated before me, the Infinity can control the DBW and has already been proven to work with the E46 M3 DBW actuator.

[/QUOTE

I was watching a "Built by Jeff" episode on Youtube. He did the conversion on a '73 911 and used the same throttle. He shows his installation process and and also, makes a new wiring harness.