Agreed - a very bland statement from Benny with no explanation offered.

Ben

OK - but why have engines failed at those levels? You can't just make sweeping statements, and there are a lot of factors to consider.

But is it that 330lb/ft at 4500 rpm that kills the engine, or is it the fact that they run lots of boost to get that, which the boost controller hangs onto as much of as it can right upto the redline? I would be happy to run loads of boost if it tailed off quickly. Loads of torque, less power up top, safer engine IMHO.

330lb/ft is seen to be the general limit of the rods.

I tell you what i wont bother to express my veiws .



Ben

Power and torque are just results, not causes. If you can find a way of getting more than that without too much heat / stress / pressure etc on the internal parts then great!

Like suba says, you've got to take into account all the many variables to know whether it's safe or not.

What I'm trying to say is, I dont think you should rely on what the rolling road says your car is making to judge whether the mods you've installed are safe or not.

Nothing untrue in what Benny was saying - too much torque will bend standard rods, regardless of how much boost is being used to produce the torque. The safe limit is estimated to be around 330lb-ft - some engines will take more. Mine bent at around 350lb-ft.

However, there's some truth in the other statements too - you can kill an engine with too much fuel, too little fuel, too much back-pressure, too much heat, detonation, and lots of other things too (although to date, I still reckon the biggest killer is lack of oil - totally avoidable)

Forged pistons and forged rods is ALWAYS a smart move regardless of how much power you have. If you can't afford to do anything else do this, it sets a strong foundation, tuning parts to follow can be easily replaced but the bottom end is your roots. If you’re going to rebuild the engine do it once and do it properly.

Turbo choice will be completely up to you. Everyone is going to have their personal preference even cars with the same turbo behave different so there is NO right or wrong choice. You have to pick one in the powerband you want and see how it suits your setup then make any changes from there.