Cheap diy DBW ideas for ITBs

[d.p.n.s]

Hi all .

I'm running a nissan GTIR inlet (ITBs on my 2.0 pinto turbo and I'm wanting to change a few things with the build of that car and one of them is upgrades on the motor and upgraded ECU

The ecu I'm looking at has is capable of having DBW (drive by wire ) and that something im wanting to have and I also want to keep the ITBs .

I have room to move and I'm pretty capable of making shit..but I'm not a rich man..

I know there's plenty of pedals out there I can make work ..but it's the actuator for the ITBs where I'm struggling..

I know I can get one from a BWM M series car but they are fucking expensive and so are all the after market ones..

I have thought about getting my hands on a DBW throttle body and just cutting it up till im left with part of the body ,the motor and the shaft that would of had the throttle plate in it and just going from there.

But I thought I would d ask here 1st as you guys are some of the cleverest buggers out there.. and I would appreciate your input.

Cheers

[JustHarry]

4 minutes ago, d.p.n.s said:

Hi all .

I'm running a nissan GTIR inlet (ITBs on my 2.0 pinto turbo and I'm wanting to change a few things with the build of that car and one of them is upgrades on the motor and upgraded ECU

The ecu I'm looking at has is capable of having DBW (drive by wire ) and that something im wanting to have and I also want to keep the ITBs .

I have room to move and I'm pretty capable of making shit..but I'm not a rich man..

I know there's plenty of pedals out there I can make work ..but it's the actuator for the ITBs where I'm struggling..

I know I can get one from a BWM M series car but they are fucking expensive and so are all the after market ones..

I have thought about getting my hands on a DBW throttle body and just cutting it up till im left with part of the body ,the motor and the shaft that would of had the throttle plate in it and just going from there.

But I thought I would d ask here 1st as you guys are some of the cleverest buggers out there.. and I would appreciate your input.

Cheers

I see there's a bmw 7 series at pap with a valvetronic v8 . Maybe the throttle body actuator might be suitable ?

[d.p.n.s]

6 minutes ago, JustHarry said:

I see there's a bmw 7 series at pap with a valvetronic v8 . Maybe the throttle body actuator might be suitable ?

Thats still just a DBW throttle body right?.

Not an actual DBW actuator .

[shrike]

Motorbike DBW ITBs seem to be a good option 

@Romanused BMW S1000RR on his Echo 

Could possibly weld your plenum onto the top of them and do an adapter to the head 

Or you might be able to retrofit the off them 

Pricing seems to have gone up recently (seen them 200aud a set previously) but might be a local option 

The BMW s54 one your mentioning are expensive and from memory had a habit of needing replacement. People seem to like them for retrofits 

The other aftermarket options are expensive 

You could potentially get two dbw throttles from say a barra dbw falcon and run a motor off those on each end of your throttle (wiring them together) (as I don't think the factory motor would be strong enough to do all 4 itbs)

You would probably need a new longer itb shaft that's keyed to fit tho

Could be fun to bench test a standard dbw throttle and see how strong they are tho

[d.p.n.s]

6 minutes ago, shrike said:

Motorbike DBW ITBs seem to be a good option 

@Romanused BMW S1000RR on his Echo 

Could possibly weld your plenum onto the top of them and do an adapter to the head 

Or you might be able to retrofit the off them 

Pricing seems to have gone up recently (seen them 200aud a set previously) but might be a local option 

The BMW s54 one your mentioning are expensive and from memory had a habit of needing replacement. People seem to like them for retrofits 

The other aftermarket options are expensive 

You could potentially get two dbw throttles from say a barra dbw falcon and run a motor off those on each end of your throttle (wiring them together) (as I don't think the factory motor would be strong enough to do all 4 itbs)

You would probably need a new longer itb shaft that's keyed to fit tho

Could be fun to bench test a standard dbw throttle and see how strong they are tho

The GTIR full ITB inket is allreafy bolted the head and running so I'm not looking for an alternative ITB set up really.. same as this setup i made for my nephews motor

My plan so far is is to remove all the springs from the ITBs return spring setup (so bugger all tension).

and buy a generic bosch FBW throttle body and cut most of it off so I'm left with the motor and part of the throttle shaft. (Like this)

And.mount it under the ITBs and just make the right size linkage to open and close them.

Unless there's a cheap DBW actuator out there or some other idea that is cheap and.may work. 

 

Cheers 

[Nominal]

I presume you saw the bulldozer option

?

[Roman]

E-throttle is just an H bridge controlling a DC motor...
So you can literally use any DC motor that is within its torque and rpm range with the available juice (~14v and 2 amps or something like that?) 

A lot of the ethrottle setups have a lot of internal gearing to step down the motor speed by roughly 10:1 - 20:1 kinda range. 

I'd definitely not reccomend removing any of the springs from the throttle bodies though, probably wont pass wof/cert/etc, and it's also very dangerous if your motor fails and there's nothing to bring them to home position.
 

[Roman]

The bulldozer throttle setup wasnt suitable, I also bought a cheap cruise control cable unit.

However I found that it housed a stepper motor not a DC motor, so too much of a pain to get it working.
Would have been a nice solution if it was a regular DC motor.

[Roman]

A lot of the expensive looking aftermarket options that do the same thing as you're suggesting (Jenvey, EFI hardware etc) 
Look to just be a Bosch ethrottle unit with the guts put into a CNC'd housing. 
I think the chopped up factory throttle body is a good plan, might need to retain something to support the far end of the throttle shaft though.

This is only 2 wire which would suggest it's just a regular DC motor but not sure how it would work in reality. 
Says 24 volt so not sure if it would work okay on a 12 system, guess so?
Might work too slowly though, dunno.
https://www.aliexpress.com/item/1005006106982472.html


EDIT: 

This one might be good, good price too.

https://www.aliexpress.com/item/1005007988405812.html

[d.p.n.s]

13 minutes ago, Roman said:

A lot of the expensive looking aftermarket options that do the same thing as you're suggesting (Jenvey, EFI hardware etc) 
Look to just be a Bosch ethrottle unit with the guts put into a CNC'd housing. 
I think the chopped up factory throttle body is a good plan, might need to retain something to support the far end of the throttle shaft though.

This is only 2 wire which would suggest it's just a regular DC motor but not sure how it would work in reality. 
Says 24 volt so not sure if it would work okay on a 12 system, guess so?
Might work too slowly though, dunno.
https://www.aliexpress.com/item/1005006106982472.html


EDIT: 

This one might be good, good price too.

https://www.aliexpress.com/item/1005007988405812.html

Thats not bad at all.

I am leaning towards a matching pedal and throttle body from the same car and just having a play with the throttle body ..(pick a part isn't very expensive).

I did think about the support of the other end of the throttle shaft.

Think ill find one next time I'm out there and just have a play with it ..even to see if its strong enough to open the ITBs with return springs in place

[Roman]

Matching the pedal and throttle body doesnt matter, as they both communicate to the ECU completely separately. 

So find a pedal that best fits rather than what matches the motor. 

Some good options for e-throttle pedals from commonish cars. 

Prius/Aqua/etc has a pedal that's easy to get. RX8 pedal is a nice unit if it fits. 

The prius/350z/etc sensor is like a TPS with a little lever arm on it, so you might be able to weld something up to just adapt this to your factory pedal. 

[d.p.n.s]

Thanks for that mate.

I've been focused on the ITB side of things more than the pedal side at this point (I just figured the pedal would be easier to adapt).. but thats some great information. 

And I just figured a matching pedal and TB would need to be a thing...but if not thats even better.

And honestly didn't even think about the prius.. was naturally thinking commodore, falcon,subaru. 

So thanks again

[BlownCorona]

i can assist with a generic bosch DBW throttle body. 

[BlownCorona]

and a pedal to suit. 

im going to use the same gear on my twin turbo 18rg eventually 

[d.p.n.s]

9 minutes ago, BlownCorona said:

and a pedal to suit. 

im going to use the same gear on my twin turbo 18rg eventually 

Champion.. .

Will have a chat about it mate.

[nobody]

I used the BWW S54 dbw actuator originally with a haltech 1500 and I just couldn't make them last, they break the shaft retaining plate then the shaft moves and they short out taking the ecu with it. Tho they were all second hand units, getting a new unit might be different.

I moved to using an EFI hardware actuator (https://www.efihardware.com/products/3196/drive-by-wire-actuator-dbw) and have never looked back been in the car over 5 years now, Mazda 323 4g63 swapped, custom cnc'd intake adaptor with 4age quad throttles 

[d.p.n.s]

1 hour ago, nobody said:

I used the BWW S54 dbw actuator originally with a haltech 1500 and I just couldn't make them last, they break the shaft retaining plate then the shaft moves and they short out taking the ecu with it. Tho they were all second hand units, getting a new unit might be different.

I moved to using an EFI hardware actuator (https://www.efihardware.com/products/3196/drive-by-wire-actuator-dbw) and have never looked back been in the car over 5 years now, Mazda 323 4g63 swapped, custom cnc'd intake adaptor with 4age quad throttles 

Thanks for the info mate.

But honestly I can't afford to pay $1200 for an actuator  so really if I can't make one .I'll just swap the manifold out for another one with 1 throttle body and common plenum and just add  a DBW throttle body and run with that.

 

[Muncie]

Interested in this too. Can DBW be set up as a standalone kind of thing? Eg only TPS back to ECU or do you have to have ecu feedback in system........ massive lack of knowledge here.

[Rookie]

Ill just leave this here...

https://www.autoreservejaguar.com/jaguar-parts/air-and-fuel-delivery.html/s-type-xj-xf-2-7-diesel-2004-2010-throttle-body-actuator-motor.html

Part number: C2S51097

I found the jaguar items long ago and they were pretty new then, I have never used one but it appears as if they have the right number of pins to do what we need it to.

 

[d.p.n.s]

On 11/11/2024 at 20:17, Rookie said:

Ill just leave this here...

https://www.autoreservejaguar.com/jaguar-parts/air-and-fuel-delivery.html/s-type-xj-xf-2-7-diesel-2004-2010-throttle-body-actuator-motor.html

Part number: C2S51097

I found the jaguar items long ago and they were pretty new then, I have never used one but it appears as if they have the right number of pins to do what we need it to.

 

Thats very interesting. 

Will look more into that. Looks like a nice compact unit