3200 throttle body - lock down project.

davy83

Member
Messages
2,809
I have managed today to get a modified Volvo Throttle body running on my car, with no errors and it seems to run well. With lock down and all that I am not sure when I will get a chance to do an extended road test or even a rolling road test to check its not causing any problems but its progress. The volvo unit needs mechanical mods and also reprogrammed on the car, not worked out what the best process would be to replicate it.
This might also allow me to replace the electronics module on a standard unit, by reprogramming the Volvo ones if I can get them anywhere.
However if i can prove this is ok, this would make it a lot easier to get replacement throttle bodies.
 

boomerang

Member
Messages
412
ACtronics in Holland, who “invented “ the contactless conversion for the Volvo variant, and produced the Sacer sensor in China, stated that the internal module was different to the Maserati units.
Would be surprised a lot if a volvo unit with the original Volvo electronic module, would run on a Maser.
Also, the butterfly of the Volvo unit is bigger, what will cause a quite nervous throttle response.
Quite a challenge with a manual
 

Lozzer

Member
Messages
2,280
ACtronics in Holland, who “invented “ the contactless conversion for the Volvo variant, and produced the Sacer sensor in China, stated that the internal module was different to the Maserati units.
Would be surprised a lot if a volvo unit with the original Volvo electronic module, would run on a Maser.
Also, the butterfly of the Volvo unit is bigger, what will cause a quite nervous throttle response.
Quite a challenge with a manual

I wouldn't put anything past Davy, if he says he has, he has, he's a bit of a genius in that department. Where do you think all your coil on plugs came from? ;)
 
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allandwf

Member
Messages
10,958
ACtronics in Holland, who “invented “ the contactless conversion for the Volvo variant, and produced the Sacer sensor in China, stated that the internal module was different to the Maserati units.
Would be surprised a lot if a volvo unit with the original Volvo electronic module, would run on a Maser.
Also, the butterfly of the Volvo unit is bigger, what will cause a quite nervous throttle response.
Quite a challenge with a manual
Why with a manual? They both narrow the band if wide open throttle isn't used. A good excuse to floor them from time to time :)
 

davy83

Member
Messages
2,809
ACtronics in Holland, who “invented “ the contactless conversion for the Volvo variant, and produced the Sacer sensor in China, stated that the internal module was different to the Maserati units.
Would be surprised a lot if a volvo unit with the original Volvo electronic module, would run on a Maser.
Also, the butterfly of the Volvo unit is bigger, what will cause a quite nervous throttle response.
Quite a challenge with a manual
Well I was concerned that the throttle would not be right, but if anything it seems less twitchy. The last 10 % of the butterfly motion has a profiled shape to presumably make low throttle better controlled.

I am just at the stage of road testing, so early days, but was super happy when it ran error free today.
 

alfatwo

Member
Messages
5,517
Sounds promising... It might even flow more air, ie more HP
Depends on the standard ECU's mapping ability to add more fuel if needed

What sort of HP do the Volvo engines produce with this type of TB fitted?

Dave
 

davy83

Member
Messages
2,809
Sounds promising... It might even flow more air, ie more HP
Depends on the standard ECU's mapping ability to add more fuel if needed

What sort of HP do the Volvo engines produce with this type of TB fitted?

Dave
I am not suire how that will work, which is why in normal times i would probably have got it on a rolling road to see how it compares.
I think there are a lot of things which affect HP, and the choke diameter is unlikey to have a big effect on this.
I am constrained by the response the ECU expects from the ETM module and to start altering the throttle to try and get more bean out of it would require an interface to break the control of the ECU, and allow me ot alter the control algorithms, but keep the ECU happy at the same time. Not sure I want to go there?
 

davy83

Member
Messages
2,809
I wouldn't put anything past Davy, if he says he has, he has, he's a bit of a genius in that department. Where do you think all your coil on plugs came from? ;)
Ah some one has been doing their homework, that was a long time ago dude, and I only devised that scheme so the loony project I was working on would not be deemed as a safety hazard. Apparently people don't want to get killed when mucking about with their cars :) . Still it has turned out to be a popular idea.
 

Lozzer

Member
Messages
2,280
Ah some one has been doing their homework, that was a long time ago dude, and I only devised that scheme so the loony project I was working on would not be deemed as a safety hazard. Apparently people don't want to get killed when mucking about with their cars :) . Still it has turned out to be a popular idea.
Heard it from the horses mouth mate, in a bar far far away......well Germany ;) Modesty is a virtue.. :)
 
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MRichards

Member
Messages
278
Glad to hear my suspicions have been proved correct. The Volvo variant of the MM unit always seemed like the answer to our Maserati TB problems. On ya Davy !
 

safrane

Member
Messages
16,748
Sounds promising... It might even flow more air, ie more HP
Depends on the standard ECU's mapping ability to add more fuel if needed

What sort of HP do the Volvo engines produce with this type of TB fitted?

Dave
The T5r Volvo Estate I had 2001 which I believe used the same TB produced c250hp
 

boomerang

Member
Messages
412
The Volvo part could work with the original Maserati module.
But then throttle response could be challenging.
interesting.
 

allandwf

Member
Messages
10,958
Remember the volvo variant suffered the exact same issues, But it would make sourcing a donor for internals upgrade easier if it works. Keep up the good work Sir :)
 

davy83

Member
Messages
2,809
Well I have established there are some problems with the shape of the choke area, and it is definintely different. I will have to try modifying the choke profile, strangely the start and idle is muh better but the car lacks urgency, it will need some work i think. Ah well lock down activity goes on!!!
 

davy83

Member
Messages
2,809
So I have worked out what was making it behave differently. Modified the choke profile and now it drives like it used to, perhaps feels quicker, but now it is slightly unstable when idling just like the original!!! Dooooh. It's pretty good though based on a short test drive, so i am happy with that. jobs a good un.
 

Tamariini

Junior Member
Messages
102
very interesting indeed since my throttle body died a week ago.... magnet corrosion got butterfly stuck and now even with magnet repaired throttle body does not work. Might have broken something else..
Lots of Volvos here in Finland so Volvo throttle body is easy to source (at least a LOT easier than Maserati one..). Any advice how to make Volvo one work?