Hey guys, I have the genuine Alfa 'Linea Accessori' brochure for the GT and these wheels are listed as part no. 50903034, simply called "Star Design". I also have the same brochure for the facelift 147, but they aren't listed in that.
Used the 2.0 cam locking tools. I have both 1.6 and 2.0 (which also fit the 1.8).
Wouldn't attempt it without at least the locking blocks.
How does it run? The reason I ask is a guy I used to work with fitted 2.0 cams in his 1.6 147 and initially timed it up with 2.0 tools but had better results by playing with the timing a bit. I think he retarded one cam and advanced the other? I can't remember exactly what he did but he certainly thought non-standard cam timing made the engine run better using 2 litre cams.
This was without remapping the ECU, and the car was also fitted with a modified CF2 exhaust manifold & down-pipe to do away with the pre-cats.
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I would like to get with of the pre cats to free the flow a bit. But not essential. I only changed to the cams as I got them with a variator that I needed.
Any case, I did change the over lap when I used the 1.6 cams. I basically retarded the inlet a bit more than standard 4 degrees. This created a larger overlap. But although it made 3k plus very lively and the idle a little lumpy I believe the car was caster over standard.
But I lost smooth low power and increased fuel consumption.
On the 2.0l I've just timed them standard. No change in overlap. It's smoother but Its improved the midrange a little.
Do you know what the chap retard the inlet by and what results they got?
I mean it's basic cam physics. But as this variator is new there could be a combination of things that have helped it be smoother.
I think my ex-colleague did the opposite - whatever he did smoothed the idle out and made it feel torquier at low revs (what the 1.6 needs), although it still did rev well. I don't have contact details for him but he probably wouldn't remember anyway, I think it was just done by trial and error.
Theoretically if you close the over lap it should make it more frugal at lower revs and torquier.
Exaggerating the overlap does the opposite.
Changing which the valves open during the cycle then moves the power band up or down the rev band. But this is obviously limited as you are ways playing with fixed cams any way. There's only a few variables you can poke at.