I was thinking of skimming the head and gas flowing the head, and improving the exhaust. Not sure maybe I could do something with the the throttle body to improve higher rpm as it doesn't really have any high rpm
On its own it will not make any noticeable difference
The current setup is pretty good and and mapped well
You need to change the camshaft not easy or cheap to come by now
Then there's the cost of reshimming
I posted loads of information, such as here
How would people feel about plug and play intake kits? I'm considering making an itb kit that uses a 3d printed 2 part manifold and 1, 2, 3 or 4 stock fiat throttle bodies all run using the stock ecu and fuel injectors. Bigger and smoother intakes provide more horsepower from the significantly...
www.fiatforum.com
Also posted some back to back testing of a full decat and straight through exhaust on a standard engine awhile back that made virtually no difference
There's a lot of mis information from people selling a product or service, a lot of the rolling road graphs aren't right, we know what the graph for the standard engine should look like, some haven't even got this bit right
There's a magazine article (retro cars) that you can find online on tuning the fire engine, by a proper tuning company (Wolf)
To make a noticeable difference in a car that still nice to drive around town, it's easier cheaper and better to fit the 1.4 from a donor 100HP, it's been done several times