How much duration do you have to run to get these figures?
What are the egt's sustained in higher gears?
How much smoke?
What is the lambda across the range?
Approx 5 years ago I had ran my ARL with approx. 40deg duration for about 25k (230hp with a hybrid) after which I removed the head to do some head work.
I had two cracked pistons even though the engine ran fine.
Making these figures is only one side of the story for me - people don't want huge amounts of smoke and they want their engines to last hence why I always change injectors when the have reached close to 40deg.
For most they would rather change the nozzles than have cracked pistons - so its a false economy.
However, every case is different for example I done some work on a T5 2.5pd recently 40deg duration with 880deg egt's sustained (3rd, 4th and 5th WOT). The van has zero smoke, but they run 520cc injectors.
Cheers
Bobby
Bobby you are really missing the point of these forums and diesel tuning innovation by asking these questions around sustained EGTs. Every car is tuned in different ways with different goals in mind. Skillaturbo is tuning his own car himself and is enjoying exploring and pushing the limits. He seems to be tuning the top end of his car to complete 1/4 mile drags not take the car on Nordschleife and survive Dottingher Hohe or the fast uphill sections. So what's the point in asking about
sustained EGT temps?
Bobby Singh said:
I don't think you are getting my point - Turning up duration to make x amount power is one thing, but its a different thing to claim its safe.
You think smokefree top end makes it ok to keep increasing duration?
Governing factor is egt (and lambda for available)
Look at the video posted by Martin its smokefree but egt's are 880deg.
Noone claimed it's "safe"... unless I missed something? But I'm sure you can deduce what is and what isn't safe yourself, as explained above it's proably "safe" to run these durations for a few 1/4 mile drags 3 times per year, but not take the car out on a track day
Bobby Singh said:
Thanks for the reply - I'm sorry but you can't come on here claim you have x amount of hp from stock nozzles then say you don't need to give evidence of asked data.
Yes he can? Or can you point me to the forum rules that says something like "people cannot discuss their achievements and findings with research related activites without a gruelling from vendors and tuners who have not achieved the same". What do you think this forum is about? Who are you to say what people can and cannot discuss here? Why are your minds all so closed you have to shut someone down and
discourage talk which I find very factually interesting and is completely in line with the discussion objectives of the forum? He doesn't need to give anything you ask. You should be grateful that someone has risked their own personal hardware to pistons cracking and turbos melting in order really push the limits and actually come here, share the results, show what can be done and spark a discussion. The industry needs more of this. If anyone is breaking forum rules it should be you by discouraging this work and pushing the thread off topic - towards what people can and cannot say and away from the technical aspects of the hardware and tuning. Shame on you!
I think it's absolutely disgusting the attitute of some of these comments and it puts me off wanting to read topics on the forums, funnily enough these comments always appear to come from tuners or vendors who are salty that they either cannot achieve it themselves/are too lazy or cheap to do some research and development themselves or feel it might raise the expectations of their customers towards something they cannot offer them as it's deemed "unsafe". Like I said, it depends on the use cases of the car in question.
ryanp said:
Hats off to anyone pushing the boundaries on a budget, that's what the forums are about.
Finally. Couldn't say it better myself. Thank you for appreciating and recognising his efforts
Don't be discouraged skillaturbos, there are still people here who do appreciate and are enthusiastic to see your results. Good job
