Thor DSC & TSD work on VVTi?

I think I already no the answer and it's going to prove me to be an impulsive prat... but does the Thor DSC & TSD work on a TT VVTi?

There's no application for it on the site...

6speed yes

Tiptronic no

AFAIK.

Bugger!

well, it's a bit of yes and no i'm afraid..................

I've got the vvti tiptronic and the thor unit fitted, it does remove the speed limiter, however it buggers up the traction control (so you have to switch it off every time you get in the car) and because these cars have an integrated ECU for the engine & gearbox it won't change into top gear at WOT........worse still if you are doing say 130 and floor it, it will change down into the revlimiter.......

if you can find someone who can properly sort the ECU....please....please let me know

cheers

mark

Oh, the problem with the gearbox is because you have capped the speed signal to the ECU, thus eliminating the speed limiter but also telling the gearbox controller that the car is still doing say 110mph!

cheers

This is the kinda thing mine is doing at the moment and was hoping a swap to the Thor one would fix.

Sod it.

Right. This is really pissing me off now.

Coming back tonight I was approaching 150leptons and gave it a bit more throttle to see what it'd do top speed (wide open empty straight motorway so only myself to kill/mame/injure).

What happened? Bloody car tried to dropped out of gear that's what! I backed off the accelerator immediately and it put itself right. I don't think it dropped a gear as it didn't lurch or slow much, more like it went to neutral and maybe something in the gearbox so "hang on, this is gonna hurt" and didn't actually engage a lower gear.

I never did get around to buying a Thor unit as people said it did the same thing.

There has to be some way round this!? (Other than driving slower)

All the Tipto ones do it. It's a bit annoying but not a huge problem. I've had 172 (GPS) out of mine using like 95% throttle.

Would be cool if someone found a converter that didn't do it though.

All the Tipto ones do it. It's a bit annoying but not a huge problem. I've had 172 (GPS) out of mine using like 95% throttle.

Don't you wonder what the extra 5% throttle would give you?

excuse my ignorance but what triggers the downshift? i understand the ecu thinks its slow enough to kick down but what circumstances/inputs cause it, its not the kick down switch under the accelerator pedal like us regular auto chaps is it? is it related to 100% throttle via the VVTi's fly by wire throttle thingy?

excuse my ignorance but what triggers the downshift? i understand the ecu thinks its slow enough to kick down but what circumstances/inputs cause it, its not the kick down switch under the accelerator pedal like us regular auto chaps is it? is it related to 100% throttle via the VVTi's fly by wire throttle thingy?

Not sure, I don't understand this stuff enough to diagnose it which infuriates me. If there was a manual I would read up on it and dedicate some time to the cause, but finding one is not going to happen this side of doomsday.

just thinking that, if the kick down is "switch under the pedal" activated then surely someone can rig up an inline switch that can cut off the signal from the kick down switch? so you had a dash switch like you do for TRC control?

What de-limiter do you currently have Pete?

Been meaning to try that Speedm8 on my Aristo...

Gaz.

What de-limiter do you currently have Pete?

 

Been meaning to try that Speedm8 on my Aristo...

 

Gaz.

I think that's my next plan - get one of those Speedm8 jobbies after my hols. If only they'd answer my email

Are you thinking of signing up for the reseller kit so you get the software and leads? Could perhaps get one through you then to help you meet the min order qty?

The convertor is an unbranded one so I don't trust it anyway. The TSD is an HKS SLDII.

Problem is it's not something you can test very easily at those speeds.

surely someone can rig up an inline switch that can cut off the signal from the kick down switch?

Interesting idea. Anyone think it's a good idea? Might try it if so.

Interesting idea. Anyone think it's a good idea? Might try it if so.

Interesting.

It would have to be a relay though right, as you have an input and output, switch would connect to that.

Gaz.

(keeping an eye on this thread with interest while those more knowledgeable sort it out...)

It doesn't prove too much of a hassle as there's not many places you can go WOT in top, but it's about the only thing I don't like about the tip.

Interesting.

 

It would have to be a relay though right, as you have an input and output, switch would connect to that.

 

Gaz.

That's IF there's a switch. As suggested, it might all be controlled by the Throttle By Wire electronic system.

6speed yes

Tiptronic no

 

AFAIK.

Is this really true?

That the thor unit works properly on a vvti tt 6 speed?

John

Is this really true?

That the thor unit works properly on a vvti tt 6 speed?

 

John

just has different wiring instructions...........FCD that is...

I'm wiith pete on this one, it really pi$$es me off when you try and give it WOT past 112mph trouble is with a car like this that sort of speed comes round soooo easily !!!! and if you are in the habit of taking on bikes you need WOT all the way past 150 leptons

I would doubt the kickdown is just of a switch, the VVTi has some sort of accelerator pedel position transducer I'm guessing it uses this plus engine speed, actual car speed etc.......

I even thought of trying to get in touch with Denso to see if they could supply me with a new ECU without the speed limiter............bet that would be a fair old price

can someone pleeeese sort this out!!!!

What de-limiter do you currently have Pete?

 

Been meaning to try that Speedm8 on my Aristo...

 

Gaz.

I bought one of these Speedm8s today. I'll let you know if it works ok.

Speaking to the guy there he seemed very clued up and answered all my questions on 1:1 signals, g/boxes, trac flashing etc and knew about all the issues having had a customer with one and spent sometime tailoring the firmware for it.

He couldn't comment on the gear dropping down as he's "not been that fast in one!" and suggested if it was to do with the ECU becoming comfused by the capped speed signal it gets thinking it's safe to drop a gear then there's no way round that other than ECU replacement.

It's about a third cheaper than Thors so we'll se how it goes.

To be honest, I'm thinking maybe I ought to re limit the car for my own safety and license!!

It arrived this morning but I'm not convinced from the instructions it's going to be any better.

It doesn't mention a 1:1 output for the rest of the system for instance. I'll call them later.

well, it's a bit of yes and no i'm afraid..................

 

I've got the vvti tiptronic and the thor unit fitted, it does remove the speed limiter, however it buggers up the traction control (so you have to switch it off every time you get in the car) and because these cars have an integrated ECU for the engine & gearbox it won't change into top gear at WOT........worse still if you are doing say 130 and floor it, it will change down into the revlimiter.......

 

if you can find someone who can properly sort the ECU....please....please let me know

 

cheers

mark

I wish i had seen this thread earlier, it would have saved me a big headache as i had this problem which was limiting my car to 2300rpm, only figured out on Sunday that all i needed to do was switch the RLTC off to sort it

My question to them :

I think the gearbox/Trac Control require a 1:1 speed signal to operate correctly? Is that what this system does?

Reply :

2: The Gearing / Traction control is all controlled in the engine ECU, along with the road speed limit. The SpeedM8 unit maintains these signals as original until the vehicle speed exceeds approx. 105 MPH, then the output is locked until the speed decreases below the lock point.

So what was the need for the 1:1 signal in Pete Betts' solution?