Amazing acceleration tuned QV TCT - Alfa Romeo Forum
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(Post Link) post #1 of 22 Old 18-07-17 Thread Starter
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Amazing acceleration tuned QV TCT

Hi Guys,

Some weeks ago I bought a Giulietta QV TCT Launch Edition in Magnesio Grigio. Last weekend I went to BR Performance in the Netherlands to give her a bit more grunt. We installed a BMC filter, removed the middle silencer and put here on a dyno to remap the software. And well, what can I say. It was already a fast car, but the 0-100km/ph and 50-130km/ph times are absolutly ridiculous! And I still have to practice on a good start! Car now has 274HP and 411NM with 23 degrees celcius.

0-100:

50-130:

Alfa Romeo 4C full option.
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My QV is mapped as well, a bit more than yours and it is a blast to drive! :-) I have the manual version though, so 0-100 isn't as fast as yours, since my gear changing skills aren't as good as the TCT box...
But like yours, the mid range acceleration is just nuts. You don't meet many cars on the road that can keep up from 50 - 130!
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(Post Link) post #3 of 22 Old 18-07-17 Thread Starter
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Originally Posted by Esser View Post
My QV is mapped as well, a bit more than yours and it is a blast to drive! :-) I have the manual version though, so 0-100 isn't as fast as yours, since my gear changing skills aren't as good as the TCT box...
But like yours, the mid range acceleration is just nuts. You don't meet many cars on the road that can keep up from 50 - 130!


I had a manual QV before this one also. It had a 3 inch turboback exhaust with 200cell cat, bigger intercooler, BMC, software, stronger clutch, lighter flywheel, etc.
It had 300hp and 460nm of torque. In gear it was blistering fast, but from 0-200km/ph this car is as quick because of the gear changes.

Therefore I will keep this car as it is right know. It's not that explosive as the last one, but fast enough!

Last edited by alfata; 18-07-17 at 11:42.
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Originally Posted by alfata View Post
I had a manual QV before this one also. It had a 3 inch turboback exhaust with 200cell cat, bigger intercooler, BMC, software, stronger clutch, lighter flywheel, etc.
It had 300hp and 460nm of torque. In gear it was blistering fast, but from 0-200km/ph this car is as quick because of the gear changes.

Therefore I will keep this car as it is right know. It's not that explosive as the last one, but fast enough!
Wow! Sounds like a lot of fun! Where did you get the 200 cell cat and stronger clutch?
Also how is the TCT gearbox for normal slow driving? Is it good at that?
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Quote:
Originally Posted by alfata View Post
I had a manual QV before this one also. It had a 3 inch turboback exhaust with 200cell cat, bigger intercooler, BMC, software, stronger clutch, lighter flywheel, etc.
It had 300hp and 460nm of torque. In gear it was blistering fast, but from 0-200km/ph this car is as quick because of the gear changes.

Therefore I will keep this car as it is right know. It's not that explosive as the last one, but fast enough!
Wow! Sounds like a lot of fun! Where did you get the 200 cell cat and stronger clutch?
Also how is the TCT gearbox for normal slow driving? Is it good at that?
The exhaust with 200 cell catalytic converter was from JMTuning from Dirkshorn the Netherlands. They have a mold for a QV, so think you can order from another country.
The clutch was from Sachsperformance. You can order it in their website.

The TCT is great for slow driving. The manual QV is not I can tell from experience. The only thing is with cold engine, the first kilometer it changes gear very late. But I always put it in manual mode the first kilometer.

Last edited by alfata; 18-07-17 at 13:51.
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alfata cost?
I am in netherlands! interested in a year or so to do something similar.
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alfata cost?
I am in netherlands! interested in a year or so to do something similar.
600 euro. But that was a promotion. Think normal is 700 euro. Included are all dyno runs.
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No one has mentioned torque steer!
In the Scottish Highlands warm, dry roads are quite rare and the standard performance produces noticeable & unpredictable torque steer so I've held off tuning the engine, (having found out what happens when you tune a 155bhp DS3 to 200bhp - real handful on damp surfaces).
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No one has mentioned torque steer!
In the Scottish Highlands warm, dry roads are quite rare and the standard performance produces noticeable & unpredictable torque steer so I've held off tuning the engine, (having found out what happens when you tune a 155bhp DS3 to 200bhp - real handful on damp surfaces).
I don't get a lot of torque steer to be honest. When I have the oppertunity I will try to do an acceleration with my hands of the wheel, to see what happens. Offcourse, when you have a descending bumpy road, you will have forces in the steering wheel.
But, you just have to imagine how much fun this car is, with 274HP...
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Quote:
Originally Posted by alfata View Post
I don't get a lot of torque steer to be honest. When I have the oppertunity I will try to do an acceleration with my hands of the wheel, to see what happens. Offcourse, when you have a descending bumpy road, you will have forces in the steering wheel.
But, you just have to imagine how much fun this car is, with 274HP...
I can imagine its brilliant on a dry road but 110% concentration needed on a damp one when overtaking.

Sadly won't have mine for much longer as going back to a sorely missed V6 Brera. Looking forward to the instant throttle response and lack of torque steer, but will be turning a blind eye to the fuel consumption and road tax!

Enjoy.
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Quote:
Originally Posted by alfata View Post
50-130km/ph times are absolutly ridiculous!
https://www.youtube.com/watch?v=7zHn2ePN98Y
Quote:
Originally Posted by Esser View Post
You don't meet many cars on the road that can keep up from 50 - 130!
"ridiculous" seems to be the right word..
Even the Giulia QV seems to have trouble keeping up with your 50-130 km/t time.
Be your own judge..
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They go quite nice when properly tuned

TCT helps alot with starts,

when you have a manual, it's realy hart to start over the line good!
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No doubt 300 hp in a GQV will be fun.

Some 5.0 sec from 50-130 km/h is not just "guite nice".
That's Giulia QV, BMW M3, Audi RS4 power, and not just some tuned GQV.

To me, that 50-130 video seems somehow tampered. But I would of course like to be proven wrong.
Would love to see some "real" measurement from either "Dragy GPS" or "RaceLogic VBOX" (and not from some "phony app")

Last edited by hdvp; 1 Week Ago at 11:33.
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Chilling

Quote:
Originally Posted by alfata View Post
Hi Guys,

Some weeks ago I bought a Giulietta QV TCT Launch Edition in Magnesio Grigio. Last weekend I went to BR Performance in the Netherlands to give her a bit more grunt. We installed a BMC filter, removed the middle silencer and put here on a dyno to remap the software. And well, what can I say. It was already a fast car, but the 0-100km/ph and 50-130km/ph times are absolutly ridiculous! And I still have to practice on a good start! Car now has 274HP and 411NM with 23 degrees celcius.

0-100:
https://www.youtube.com/watch?v=kPaDMpggj5o

50-130:
https://www.youtube.com/watch?v=7zHn2ePN98Y
I can't see your Dynamometer plot?

"HP = Torque x RPM 5252

(At the bottom of this page, the derivation of that equation is shown, for anyone interested.) An engine produces POWER by providing a ROTATING SHAFT which can exert a given amount of TORQUE on a load at a given RPM."

So torque must have changed! Can you publish the plots of your remapped engine, against standard? So for acceleration times to come down, power must have gone up and as power is a function of "Work - Done", torque must have changed (increased) to achieve higher power. Yet you can't really feel it??????

Curious!

Are you sure you didn't just floor the throttle, while your mates pushed the car? Don't see the car squirming or hear any tyre squeal, or many of the trees being blurred as you accelerate past.

Last edited by sizewell; 1 Week Ago at 11:54.
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Will try to see what kind of 50-130 times I get in my 159 TBi @ 276hp / 439Nm.
Think they will be not even close.
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My Giu makes a time of 5 seconds from 100 - 150 km/h (tacho, not GPS) and currently has ~ 280 HP
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Quote:
Originally Posted by IgoRR View Post
My Giu makes a time of 5 seconds from 100 - 150 km/h (tacho, not GPS) and currently has ~ 280 HP
That would be Stelvio QV power, and faster than a 4c

Stock times 50-130 km/h (100-150 km/h):

Brera 1.8 TBi 10.3 sec (9.5)
Giulietta QV 7.8 sec (7.7)
147 GTA 7.3 sec (7.2)
GT 3.2 V6 6.9 sec (6.2)
Giulia 2.0T Q4 Veloce 6.2 sec (5.7)
Alfa 4c 5.5 sec (5.7)
Stelvio QV 5.1 sec (4.8)
Giulia QV 4.7 sec (4.2)

Based from Vehicles by Alfa Romeo - AccelerationTimes.com

I did not have a go in my car this morning since we had heavy rain last night, so wet roads this morning.
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correct

takes another 9 - 10 seconds from 150 - 200 km/h
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Quote:
Originally Posted by IgoRR View Post
correct

takes another 9 - 10 seconds from 150 - 200 km/h
Maybe not far off - my guess for your GQV would've been some 16 sec 100-200 km/h measured with either Dragy or Racelogic VBOX on level road.
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correct, quite fast, you really need to know your and the cars boundaries for fast driving...
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Did some timing of OP's video in a editor.

I got a 50-130 km/h time of some 6.4 sec.
Seems absolutely plausible with TCT so I'll rest my case
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So far my best and valid Dragy measurement.
50-130 km/h 6.66 sec.
100-150 km/h 5.99 sec

Guess only thing making the 50-130 time 0.2 sec slower than OP could be blamed on the manual shift.
The G force dip is very noticeable when shifting from 2nd to 3rd gear. This just don’t happen with a dual clutch gear.

Any who, I'm quite happy comparing to these two cars (if those results are valid)
These figures seem very slow..

2017 VW Golf GTI Performance Mk VII:
50-130 km/h at 7.6 sec
100-150 km/h 7.6 sec

2019 VW Golf GTI TCR Mk VII
50-130 km/h in 6.3 sec
100-150 km/h 6.3 sec

Quote:
Originally Posted by Esser View Post
You don't meet many cars on the road that can keep up from 50 - 130!
Lot's of fast cars out there...
My brothers old 2007 BMW 135i Coupe E82 (305hp) apperently does 50-130 km/h in 5.4 sec
When I try to follow, he’s just gone - no way I can keep up with that car
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Last edited by hdvp; 1 Week Ago at 14:40.
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