Turbocharge/Supercharge my 3.0v6? - Alfa Romeo Forum
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(Post Link) post #1 of 12 Old 25-09-13 Thread Starter
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Turbocharge/Supercharge my 3.0v6?

Hi guys. I have a 2001 156, originally a 2.5 but i have had a 3.0 dropped in from a gtv.
Engine has 3.2 cams
Q2 lsd
Koni fsd's all round with eibach springs
gta fly wheel
bmc carbon dynamic air box
de cat stainless exhaust system

Car is in my garage for the winter now. I know there are more upgrades to be done, and I like the thought of turbo/supercharging it.... does anybody have any ideas?
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Depends on your budget, really.
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(Post Link) post #3 of 12 Old 25-09-13 Thread Starter
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my budget would be around £4000
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This thread https://www.alfaowner.com/Forum/tunin...-v6-turbo.html might be of interest and that's the way I would go, twin-turbo set up.
Novitec did a twin-turbo 156 I think but not sure if it was a one off.
Not sure if some of the stuff from the 2 litre V6 turbo would swap over to the 3? Maybe

Supercharger makes lots of nice easy torque, pretty sure there were a few kits available off the shelf for that conversion But the turbo engine just sounds sooooooo good

Ocht
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If you account for labor and fabrication as well, 4k won't get you very far. 2lt TB has nothing to do with 3lt 24v, nothing is interchangeable, and you wouldn't want any of it even if it was.

In my opinion, a centrifugal supercharger (like the rotrex kit) is a complete and utter waste of money. I think the only reason they caught on with the alfisti is because Autodelta brought them up and for some reason everybody afterwards stuck with them. Their principle of operation is that the maximum pressure is achieved on the rev limiter, which is useless on a street car, where you spend most of the time on the midrange, an area a centrifugal supercharger makes very little boost, just enough to compensate for the losses it introduces and a tiny bit more. A turbocharged car with the same output as a car with a rotrex supercharger will be miles faster on a typical blast on the road.
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Quote:
Originally Posted by spresv View Post
If you account for labor and fabrication as well, 4k won't get you very far.
Depending on what the goals are, how handy you are and what fabrication 'toys' you have to hand. I'd say it's doable DIY project for £4k if you accept that some/many parts will need to be second-hand/reconditioned.

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Originally Posted by spresv View Post
2lt TB has nothing to do with 3lt 24v, nothing is interchangeable, and you wouldn't want any of it even if it was.
Well that's one idea down the tubes
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Twin turbo in any of the FWD Alfa's does not really make sense. The plumbing in just about all regards are more tricky, costs are higher, etc...

In an old RWD GTV, a twin does make sense if you fit a top mount inter-cooler - all the piping is then REALLY SHORT:The only real challenge then is to get the two throttle bodies synchronized
https://www.alfaowner.com/Forum/attac...7&d=1346047784
Red one is the twin turbo - GTV6 bonnet works well for intercooler
https://www.alfaowner.com/Forum/attac...6&d=1346047767
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(Post Link) post #9 of 12 Old 29-09-13 Thread Starter
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very useful! lead to some interesting reading on alfaclub.pl and they have some awesome machines too!
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(Post Link) post #10 of 12 Old 29-09-13 Thread Starter
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Quote:
Originally Posted by INS147 View Post
This thread https://www.alfaowner.com/Forum/tunin...-v6-turbo.html might be of interest and that's the way I would go, twin-turbo set up.
Novitec did a twin-turbo 156 I think but not sure if it was a one off.
Not sure if some of the stuff from the 2 litre V6 turbo would swap over to the 3? Maybe

Supercharger makes lots of nice easy torque, pretty sure there were a few kits available off the shelf for that conversion But the turbo engine just sounds sooooooo good
turbo does sound good! a lot of respect for that project he obviously knows his stuff! bit to technical for me im just not that mechanically minded to do myself! the supercharger kits seem a lot more realistic and within budget for me
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(Post Link) post #11 of 12 Old 29-09-13 Thread Starter
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Originally Posted by danielmk323 View Post
very useful! lead to some interesting reading on alfaclub.pl and they have some awesome machines too!
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very useful! lead to some interesting reading on alfaclub.pl and they have some awesome machines too!
i send him some pm on facebook never replayed
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