Becasue the original op's question isnt about an engine swap.
It was regarding additional increase in power from the 1.6 engine.
My point was that for a limited amount of money you can get a few decent gains for budget money if you hunt around.
Yes you can do an engine swap which is much cheaper in the long run. But if you do that you may as well as you have detailed change the entire car - or least get a donor car with the engine you would like.
Sometimes Grahameo I think you miss the point.
Tuning doesn't exactly make an engine any less reliable if its done correctly.
Short stroke engines are always under more stress due to the increased rpm to get the same power.
F1 engines use large bore, short stroke to acheive the higher rpm since they are limited to capacity.
Longer throw or stroke engines have the increased leverage on the crank to acheive the additional torque.
I think your above comment is quite negative to some owners that may have a particular car and engine and just want to improve on its foundations above stock.
I personally know tuning for power gains is expensive when there are pre packed cars that are faster.
This is why i've always gone down the route of bargin improvements that help the driveability of a car.
A remap, suspension upgrades, brakes all matter much more long term than tweaking for the extra 20hp.
I know exactly what you mean mate... And no... I am not missing the point...
However what point I was trying to make is to buy a 1.8 instead...
A 1.6 with that kind of output 140 bhp ish is going to need brake upgrades from solid to vented discs.
Assuming that the OP is going to use new discs of a reputable make and not used... There is £80 for a start... Brake pads.. £40. He is also going to have to uprate suspension struts and springs at cost of at least £250.... That's £370 already without the extra costs for the cams, manifolds, gasket kits and all manner of other tweaks mentioned in this thread... Then there is insurance premium increases if it is going to be a legitimate modification...
Assuming it is going to be, how you put it "done correctly" that is.
By the time the OP adds all that up... He could buy a damn nice 1.8 TS instead and still have his 1.6 TS as a donor car and then can sell the bits he doesn't need and make a profit, not a loss...
In fact, with the comparative prices of good used parts, it should pay for the 1.8TS too
I'm all for modifications but sometimes... Some people don't see "the wood for the trees" and would happily spend another forum member's money, it's not coming out of their wallet after all, so they offer rather costly advice without adding it up or using some common sense...
I can't do that in good conscience