Where did you hear that connecting rods are weak? People have made 320+ whp and not bent a rod. Its the pistons that are no good and BNR make them. What is wrong with the cams? I have personally pushed the intake manifold to 28 psi for quite some time and quite a lot of pulls before it split. More pressure than that isnt the answer, its a bigger turbo and more rpm. Which are both possible and already done.
Keywords: before it split, cars with factory cast aluminum intake manifolds rarely ever have problems. Now that is not saying older ecotec motors have that but they have more aftermarket support and almost all new cars come with plastic intake manifolds in the interest of weight and cost saving, but not having a readily available upgrade alternative is a big downfall to the 1.4t. As far as cams, eh there is a reason why every motor with large aftermarket support has an option for cams, though variable valve timing does give you some tunability you can get really aggressive lift and overlap with custom grinds giving you other options for low end torque or power in the upper revs. And as far as rods I am not saying they are especially weak but any part of the rotating assembly is susceptible to damage and often times rods are the weakest link. They may not be for this motor but it is unsettling knowing that you're only options with this motor are
A: stop at a certain power level because parts that aren't available continuously break
B: continuously break said parts
C: pay oodles of money getting someone to engineer stronger parts for this motor because the aftermarket demand for these parts is apparently not large enough to necessitate a supply or do it yourself if you can
D: swap in a motor with more aftermarket support
So anything is possible with enough money and time and is not saying there is anything wrong with tuning this motor to your hearts desire but hey sometimes is nice to have more options
Sent from my iPhone using Tapatalk