Alfa romeo 156 3.0 V6 (the real GTA?)
Discussion
Hello, i'm Alan and i come from Slovenia. I'm reading pistonheads for quite some time and have decided to join ![smile](/inc/images/smile.gif)
I owned quite a few cars (ford fiesta xr 2i, vw scirocco, some ordinary daily drivers and a lot of alfas
)
My latest project car is an alfa 156 with 3.0 V6 24v engine from GTV.
Firstly it was planned to use her daily and occasionally on track, well that didn't last long...
But let's go from the beginning![smile](/inc/images/smile.gif)
Stock 2.5 v6
![](http://www4.slikomat.com/09/0101/zn6-DSC082.jpg)
Then i put on some ultraleggeras (less rotational weight)
![](http://shrani.si/f/2f/qs/1oc7ILOA/sphavba.jpg)
Bushes for suspension
![](http://shrani.si/f/33/qe/4bnmPVUH/sflex.jpg)
Koni sport (rebound adjustable)
![](http://shrani.si/f/7/sW/rGkngi7/foto2807.jpg)
to be continued![smile](/inc/images/smile.gif)
![smile](/inc/images/smile.gif)
I owned quite a few cars (ford fiesta xr 2i, vw scirocco, some ordinary daily drivers and a lot of alfas
![smile](/inc/images/smile.gif)
My latest project car is an alfa 156 with 3.0 V6 24v engine from GTV.
Firstly it was planned to use her daily and occasionally on track, well that didn't last long...
But let's go from the beginning
![smile](/inc/images/smile.gif)
Stock 2.5 v6
![](http://www4.slikomat.com/09/0101/zn6-DSC082.jpg)
Then i put on some ultraleggeras (less rotational weight)
![](http://shrani.si/f/2f/qs/1oc7ILOA/sphavba.jpg)
Bushes for suspension
![](http://shrani.si/f/33/qe/4bnmPVUH/sflex.jpg)
Koni sport (rebound adjustable)
![](http://shrani.si/f/7/sW/rGkngi7/foto2807.jpg)
to be continued
![smile](/inc/images/smile.gif)
I'll stick to 3.0, it has shorter stroke and i prefer it over the 3.2
Ofcourse it's not a stock unit![smile](/inc/images/smile.gif)
![](http://shrani.si/f/23/OY/2giBPVD9/motorstojlo.jpg)
3.0 engine has destroyed a bearing so i went for full overhaul and some tuning:
![](http://shrani.si/f/2y/Lv/1NpbFbqa/foto597.jpg)
![](http://shrani.si/f/2J/Ta/zcnI8h6/foto613.jpg)
![](http://shrani.si/f/2g/Um/45rmc5pu/blokkarter.jpg)
ports are big enough from the factory, so a just cleaned them and made nice knife edge inside
![](http://shrani.si/f/S/91/4YBBYA4Y/foto753.jpg)
heads were skimmed 1 mm for 11:1 CR
![](http://shrani.si/f/3W/Lb/3oK7DLLW/foto788.jpg)
AHM cams (0,8mm bigger lift and longer duration)
![](http://shrani.si/f/2K/o/1u6fCbRR/odmicne1.jpg)
shiny crank
![](http://shrani.si/f/23/Io/4XzhUTMk/glgredpolir.jpg)
Ofcourse it's not a stock unit
![smile](/inc/images/smile.gif)
![](http://shrani.si/f/23/OY/2giBPVD9/motorstojlo.jpg)
3.0 engine has destroyed a bearing so i went for full overhaul and some tuning:
![](http://shrani.si/f/2y/Lv/1NpbFbqa/foto597.jpg)
![](http://shrani.si/f/2J/Ta/zcnI8h6/foto613.jpg)
![](http://shrani.si/f/2g/Um/45rmc5pu/blokkarter.jpg)
ports are big enough from the factory, so a just cleaned them and made nice knife edge inside
![](http://shrani.si/f/S/91/4YBBYA4Y/foto753.jpg)
heads were skimmed 1 mm for 11:1 CR
![](http://shrani.si/f/3W/Lb/3oK7DLLW/foto788.jpg)
AHM cams (0,8mm bigger lift and longer duration)
![](http://shrani.si/f/2K/o/1u6fCbRR/odmicne1.jpg)
shiny crank
![](http://shrani.si/f/23/Io/4XzhUTMk/glgredpolir.jpg)
Cnc lightened flywheel and cerametallic clutch
![](http://shrani.si/f/3a/YU/2opO1Q3N/sklopka.jpg)
And because you cant just lighten the flywheel on a V6 (it has an imbalance) i weighted all assembly and made bobweights for proper balancng of the crank
![](http://shrani.si/f/3j/Ix/2zFf33JZ/drejutez.jpg)
I also reduced the main pulley size by 10% so i can spin the engine higher without water pump cavitating (and also the pulley is 600g lighter now)
![](http://shrani.si/f/2r/EY/2XhtFmh9/drejjermenica.jpg)
![](http://shrani.si/f/R/TG/4xSqr6za/drejuse.jpg)
random pic :P
![](http://shrani.si/f/42/mk/4OQDscsj/oilcoolersilikon.jpg)
weighting
![](http://shrani.si/f/3T/Dz/2NuUQg55/vaganjesmallend.jpg)
bobweights
![](http://shrani.si/f/3q/Yk/4z6TkrPl/utezi6lkne.jpg)
![](http://shrani.si/f/3A/2S/DMurA9K/readytobalance.jpg)
![](http://shrani.si/f/3a/YU/2opO1Q3N/sklopka.jpg)
And because you cant just lighten the flywheel on a V6 (it has an imbalance) i weighted all assembly and made bobweights for proper balancng of the crank
![](http://shrani.si/f/3j/Ix/2zFf33JZ/drejutez.jpg)
I also reduced the main pulley size by 10% so i can spin the engine higher without water pump cavitating (and also the pulley is 600g lighter now)
![](http://shrani.si/f/2r/EY/2XhtFmh9/drejjermenica.jpg)
![](http://shrani.si/f/R/TG/4xSqr6za/drejuse.jpg)
random pic :P
![](http://shrani.si/f/42/mk/4OQDscsj/oilcoolersilikon.jpg)
weighting
![](http://shrani.si/f/3T/Dz/2NuUQg55/vaganjesmallend.jpg)
bobweights
![](http://shrani.si/f/3q/Yk/4z6TkrPl/utezi6lkne.jpg)
![](http://shrani.si/f/3A/2S/DMurA9K/readytobalance.jpg)
I wanted to change caster and camber at front to get more grip and get rid of understeer. I made my own lower arms and moved the wheels 4cm forward and 1.5cm out. Camber is now at -3°
Fixing for bushes
![](http://shrani.si/f/3D/i4/is2YmkY/novepuse.jpg)
![](http://shrani.si/f/9/mg/4rnfw7iU/premikpuse.jpg)
arms
![](http://shrani.si/f/3o/YN/1krSRmKc/foto4499.jpg)
![](http://shrani.si/f/44/Vi/fK5xKRm/foto4512.jpg)
![](http://shrani.si/f/2l/AT/2O96TSc7/img5364.jpg)
![](http://shrani.si/f/3Y/l9/K8V5OOQ/unibalpesto.jpg)
![](http://shrani.si/f/1S/cQ/2IExTTW1/rokavpeta.jpg)
subframe was additionally welded on some places for more strenght
![](http://shrani.si/f/1i/TO/4nHigUHE/mostzvar.jpg)
To further reduce the understeer and make the car more tailhappy (my kind of driving style
)i made new rear arb that is 400% stiffer than stock
I used torsion bar from peugeot and welded some "blades"
![](http://shrani.si/f/19/Hx/4Fv4N6yP/bladestabi.jpg)
testing stiffnes stock vs mine
![](http://shrani.si/f/1H/3C/4yKkXWxz/urtest.jpg)
![](http://shrani.si/f/3k/F6/1TR4wR8L/oba-arbja.jpg)
![](http://shrani.si/f/2O/Td/1CEBx8xd/zadmoststrongflex.jpg)
![](http://shrani.si/f/32/bH/4YbdPOlM/arbbarvan.jpg)
a little jump into realtime![smile](/inc/images/smile.gif)
![](http://shrani.si/f/26/HY/7gLjQpG/156-201013grobnik.jpg)
Fixing for bushes
![](http://shrani.si/f/3D/i4/is2YmkY/novepuse.jpg)
![](http://shrani.si/f/9/mg/4rnfw7iU/premikpuse.jpg)
arms
![](http://shrani.si/f/3o/YN/1krSRmKc/foto4499.jpg)
![](http://shrani.si/f/44/Vi/fK5xKRm/foto4512.jpg)
![](http://shrani.si/f/2l/AT/2O96TSc7/img5364.jpg)
![](http://shrani.si/f/3Y/l9/K8V5OOQ/unibalpesto.jpg)
![](http://shrani.si/f/1S/cQ/2IExTTW1/rokavpeta.jpg)
subframe was additionally welded on some places for more strenght
![](http://shrani.si/f/1i/TO/4nHigUHE/mostzvar.jpg)
To further reduce the understeer and make the car more tailhappy (my kind of driving style
![smile](/inc/images/smile.gif)
I used torsion bar from peugeot and welded some "blades"
![](http://shrani.si/f/19/Hx/4Fv4N6yP/bladestabi.jpg)
testing stiffnes stock vs mine
![](http://shrani.si/f/1H/3C/4yKkXWxz/urtest.jpg)
![](http://shrani.si/f/3k/F6/1TR4wR8L/oba-arbja.jpg)
![](http://shrani.si/f/2O/Td/1CEBx8xd/zadmoststrongflex.jpg)
![](http://shrani.si/f/32/bH/4YbdPOlM/arbbarvan.jpg)
a little jump into realtime
![smile](/inc/images/smile.gif)
![](http://shrani.si/f/26/HY/7gLjQpG/156-201013grobnik.jpg)
I'm trying ![biggrin](/inc/images/biggrin.gif)
Let's go back to the engine, belt is on and cams dialed
![](http://shrani.si/f/3V/Co/3N8jXwFJ/jermengor.jpg)
![](http://shrani.si/f/1n/qr/4bcXqHox/tdc.jpg)
![](http://shrani.si/f/K/Tf/3s7c0r59/tdcwheel.jpg)
![](http://shrani.si/f/3X/l9/tkVgKxe/liftventil.jpg)
sensors for oil temp and pressure
![](http://shrani.si/f/o/Nl/22nynOk8/senzorji.jpg)
engine fitted![smile](/inc/images/smile.gif)
![](http://shrani.si/f/2M/xw/3EZdfzt9/intake.jpg)
first test for oil pressure
http://youtu.be/QapxdAsBsA8
start
http://youtu.be/00-BMXYRxYY
![biggrin](/inc/images/biggrin.gif)
Let's go back to the engine, belt is on and cams dialed
![](http://shrani.si/f/3V/Co/3N8jXwFJ/jermengor.jpg)
![](http://shrani.si/f/1n/qr/4bcXqHox/tdc.jpg)
![](http://shrani.si/f/K/Tf/3s7c0r59/tdcwheel.jpg)
![](http://shrani.si/f/3X/l9/tkVgKxe/liftventil.jpg)
sensors for oil temp and pressure
![](http://shrani.si/f/o/Nl/22nynOk8/senzorji.jpg)
engine fitted
![smile](/inc/images/smile.gif)
![](http://shrani.si/f/2M/xw/3EZdfzt9/intake.jpg)
first test for oil pressure
http://youtu.be/QapxdAsBsA8
start
http://youtu.be/00-BMXYRxYY
Now about some unnecessary weight ![smile](/inc/images/smile.gif)
I tried to lighten the front end as much as i could (serial weight distribution is around 65:35)
![](http://shrani.si/f/w/on/1jfAszYt/foto3177.jpg)
1.8kg lightweight 40cm fan
![](http://shrani.si/f/2E/5z/4wILAw5B/foto3180.jpg)
all of AC stuff removed ofcourse.
Lexan:
![](http://shrani.si/f/4/Yu/3IYuPPqv/lexan.jpg)
some cutting :P
![](http://shrani.si/f/18/A1/2qDyCHoa/vrata156.jpg)
seats:
![](http://shrani.si/f/3r/EG/3Q0Duzr9/foto2095.jpg)
steering wheel extended 20cm so i seat far back (wtcc style)
![](http://shrani.si/f/14/2L/16JjsQop/pozicijasedenja.jpg)
gauges
![](http://shrani.si/f/B/Aa/6qER2V/foto4216.jpg)
extended wheelbase (specially front wheels) it helps with weight distribution. I'm at 60:40 now![smile](/inc/images/smile.gif)
![](http://shrani.si/f/z/Rh/35PpKQnA/156stance.jpg)
And she goes!!! (scary moment included as slicks were still cold)
https://www.youtube.com/watch?v=V1JkZHhNN4U
![smile](/inc/images/smile.gif)
I tried to lighten the front end as much as i could (serial weight distribution is around 65:35)
![](http://shrani.si/f/w/on/1jfAszYt/foto3177.jpg)
1.8kg lightweight 40cm fan
![](http://shrani.si/f/2E/5z/4wILAw5B/foto3180.jpg)
all of AC stuff removed ofcourse.
Lexan:
![](http://shrani.si/f/4/Yu/3IYuPPqv/lexan.jpg)
some cutting :P
![](http://shrani.si/f/18/A1/2qDyCHoa/vrata156.jpg)
seats:
![](http://shrani.si/f/3r/EG/3Q0Duzr9/foto2095.jpg)
steering wheel extended 20cm so i seat far back (wtcc style)
![](http://shrani.si/f/14/2L/16JjsQop/pozicijasedenja.jpg)
gauges
![](http://shrani.si/f/B/Aa/6qER2V/foto4216.jpg)
extended wheelbase (specially front wheels) it helps with weight distribution. I'm at 60:40 now
![smile](/inc/images/smile.gif)
![](http://shrani.si/f/z/Rh/35PpKQnA/156stance.jpg)
And she goes!!! (scary moment included as slicks were still cold)
https://www.youtube.com/watch?v=V1JkZHhNN4U
relocating the battery to the boot (later replaced with 4kg race version)
![](http://shrani.si/f/3a/iO/7HKwIEn/foto3099.jpg)
![](http://shrani.si/f/42/XM/1Wwr1qHP/foto3102.jpg)
strenghtening plates for front subframe
![](http://shrani.si/f/9/Lp/1N0zuJeH/foto3107.jpg)
![](http://shrani.si/f/2L/ZM/3bDbBXGo/foto3108.jpg)
in road trim
![](http://shrani.si/f/Z/cj/4mkNwQoD/156petrol.jpg)
for trackday
![](http://shrani.si/f/1E/Wp/4ltndQC9/konvoj.jpg)
some videos and photos from a litlle karting track
https://www.youtube.com/watch?v=MDlYsLFV1ys
http://youtu.be/8AkH4qGdgM8
i had the fastest time and i think she drives great for a heavy v6 fwd on such a closed track (second and third car are both at around 180bhp and under 800kg)
![](http://shrani.si/f/c/iW/1b3L5NJL/cajti-rl.jpg)
![](http://shrani.si/f/e/TX/2V93T48e/img1588.jpg)
![](http://shrani.si/f/3c/Pi/1w6Shsgk/img1650.jpg)
![](http://shrani.si/f/3a/iO/7HKwIEn/foto3099.jpg)
![](http://shrani.si/f/42/XM/1Wwr1qHP/foto3102.jpg)
strenghtening plates for front subframe
![](http://shrani.si/f/9/Lp/1N0zuJeH/foto3107.jpg)
![](http://shrani.si/f/2L/ZM/3bDbBXGo/foto3108.jpg)
in road trim
![](http://shrani.si/f/Z/cj/4mkNwQoD/156petrol.jpg)
for trackday
![](http://shrani.si/f/1E/Wp/4ltndQC9/konvoj.jpg)
some videos and photos from a litlle karting track
https://www.youtube.com/watch?v=MDlYsLFV1ys
http://youtu.be/8AkH4qGdgM8
i had the fastest time and i think she drives great for a heavy v6 fwd on such a closed track (second and third car are both at around 180bhp and under 800kg)
![](http://shrani.si/f/c/iW/1b3L5NJL/cajti-rl.jpg)
![](http://shrani.si/f/e/TX/2V93T48e/img1588.jpg)
![](http://shrani.si/f/3c/Pi/1w6Shsgk/img1650.jpg)
Hehe well to make fwd go fast around a corner it has to have good roll control at rear and good grip on both front tyres. That's why thicker arb at front isnt the best solution. I have toe out at rear and just 1,5° negative camber so the car rotates nice and has almost no understeer (lsd helps too ofcourse)
It's a little twitchy but some softer rear slicks give quite good balance.
Future plan is some fibreglass and alu at front and maybe rear mounted water cooler to further improve weight distribution.
It's a little twitchy but some softer rear slicks give quite good balance.
Future plan is some fibreglass and alu at front and maybe rear mounted water cooler to further improve weight distribution.
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