Bobby Singh
Veteran Member
I could sit here and answer your points, but for me there is nothing more technical to be had from this.
Last reply from me.
Good luck
Last reply from me.
Good luck
GoodLast reply from me.
My view on SOI is that it should not really be advanced more that a degree or two from standard and my reason is this. There are 360 degrees in a single rotation of the engine and I know people write about high exhaust gas temperatures resulting from a late end of injection but I honestly think its not the EOI that is the problem.Even 20 degrees EOI (which would probably never happen!) is only 5% of the engines rotation, it still has 340 degrees of rotation left! I think high exhaust gas temperatures are far more to do with fuel being injected way past the point at which most of the available air is left for it to burn. As a result the burn is very slow indeed and results in black smoke and high EGT's. A big turbo and high boost can run very late EOI's and still have enough air to burn the fuel provided by even quite ridiculous duration lengths. A very large turbo, possibly this one even, may be able to sustain durations for which the limit may actually be how long the lump on the camshaft is that pushes the injector plunger down!
The other thing to think of about EOI times is this:-In isolation is it actually that bad a thing? Look at your peddle bike, now sit on the seat and push on one of the peddles. At which point are you going to get the most thrust at the back wheel of your bike? " Top Dead Centre"? peddle at the top? Nope! It will be at 90 degrees after TDC. Ok I know you cant have such a late EOI but I think the key is that you want the hardest part of the bang to occur then. For this reason I think higher boost easily makes up for NOT advancing SOI. A higher boost creates a faster explosion that does not need to be started much before TDC to keep up with the engine speed. Take away the boost and you need a very advanced SOI, very much before TDC. This is what VW do when the turbo is off boost, the big old block of 15 degree SOI's that you can see on their maps.
To summarise then, I actually think some very long durations can be used but the proviso being very little smoke.
I notice people don't often touch duration map 0? I used to think there was no need, I mean the selector for duration seems to suggest it isnt really used much, if at all. It most certainly is though, flat map it to zero and you will find a the car very lethargic to rev above 3200 rpm. Do the opposite and change nothing but map 0, to very high values, on a standard car and you will find it smokes at high RPM. Map 0 should be regarded by both the selector for duration map and as a high RPM map. I've mentioned it before but I have tried the above, real world....
Thanks mate. At least some people saw my point. I'm not better than anyone and I'm just showing my achievements and of course defending myself when they seems to say that I'm lying on what I have in the car.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?
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
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.
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
We just dynoed ATJ 279hp/510Nm with 37 degree duration DSSR +130%/8mm, CNC head and 10mm cam, big filter and exhaust, 2260vk 2.2bar and AFR 15. EGT around 850-900C without water.Much better to get +50 or 80% injectors if you want 250-300bhp and a clean driving experience.
He want's to know if this is possible, not safe.Friggerpants said:I've read on the internet, the injectors are maxed out at 220bhp, yet this guy believes to have 270bhp out of his?
Drivbiwire said:It's BS
Drivibiwire said:So far PURE BS.......
Bobby Singh said:I agree its bs
borachris said:Once again a case of total BS from the Brits lmao!
Pieman said:Anyway this is off topic...............................stock injector will not make that power.
And so on...JTT said:I dont think you can get more than 230hp out of stock injectors.
Yes, it is depending on use:Not depending on use, it is very dangerous and it will cause serious engine damage.
Yes, then the responses should be:The OP (and anyone) deserves to know things like what the EGTs are (you can't work out duration or any other 'secrets' from just knowing EGT).
It should also be said upfront about the danger rather than it having to be dragged out.
That is not factually correct, and you can safely push more than 240 from PD130 injectors, depending on use case. All the dyno graphs I have posted, and the videos of Skillaturbos car have factually proved that you can complete a dyno run and you can complete a drag at 270+ bhp on stock injectors. Your ignorance is high.It is factually correct, that you cannot safely flow more than 240 or so at a push from PD130 injectors.
It is 100% relevant, when the original poster asked if this is even possible, and the tuners responses are it is completely, 100% impossible, those dyno graphs are BS.The fact they CAN be pushed to provide more flow is irrelevant.
I don't know why they are saying this, when the evidence is produced the tuners say "the dyno is not calibrated". "He is using NOS". Continuing the boring theme of "safe *or not*, it is physically impossible"Do you think that's the reason why tuners, who are taking peoples money and have a reputation and what not to uphold, say they can't do more than 240?
It's not bull****, it has been proved over and over and over again the following fact:If you aren't used to having BS called out or topics changing slightly then maybe forums aren't the best place for you
You don't need to sit at 100% throttle for 5 hours though.Yes, it is depending on use:
- If you never use 100% throttle, the ECU will never use the durations required to cause engine damage.
- If you run one 4th gear dyno run at those durations, it is unlikely that enough heat and pressure will be generated to cause immediate engine failure. Likewise with a single drag strip run
- If you sit on the highway at 100% throttle at 4500rpm for 5 hours at those durations, running 1200C EGT, you will inevitably cause engine failure.
Hence... depending on use....................
Maybe so. But people don't always write things in a way that doesn't hurt your feelings.Yes, then the responses should be:
"it might be possible, but running that power on stock injectors will likely cause engine failure".
The poor responses are:
"its BS.
"More BS from the brits"
"Its impossible".
It's not ignorance though is it? I said that while you could push that power through stock injectors it would be dangerous to do so.That is not factually correct, and you can safely push more than 240 from PD130 injectors, depending on use case. All the dyno graphs I have posted, and the videos of Skillaturbos car have factually proved that you can complete a dyno run and you can complete a drag at 270+ bhp on stock injectors. Your ignorance is high.
But the safety is the key part! I could go out and shag the queen, but it would not be safe. So you say, no, you can't shag the queenIt is 100% relevant, when the original poster asked if this is even possible, and the tuners responses are it is completely, 100% impossible, those dyno graphs are BS.
The OP was asking can they be pushed to provide more flow, not"is it safe".
Well, good for you. I hope you feel proud that you / your friends have made this major breakthrough. The world will be in shock.I don't know why they are saying this, when the evidence is produced the tuners say "the dyno is not calibrated". "He is using NOS". Continuing the boring theme of "safe *or not*, it is physically impossible"
It's not bull****, it has been proved over and over and over again the following fact:
You can complete a dyno run on stock injectors at 270-290bhp
Which is, 100%, what the OP was asking (as he linked to a dyno print-out of 270bhp on stock injectors).
100% throttle for 5 hours is an example to go to the extreme, interpolate between that use case and never putting your foot down.You don't need to sit at 100% throttle for 5 hours though.
Did you miss the part where Bobby said he ran 40 degrees and on a daily driven car under normal daily driving conditions (occasional boost) he cracked pistons? He was not racing or competing. He drove it normally along the highway to work and did the occasional drag strip run
It can happen straight away.
Definately so, as it has been proved that none of this is bull****. Feelings dont come into this, its facts and figures. Neither mine, or any of my friends cars run above 225bhp on stock injectors.Maybe so. But people don't always write things in a way that doesn't hurt your feelings.
You are still ignoring the fact that completing dyno runs and drag strip runs at 270+ is possible on stock injectorsIt's not ignorance though is it? I said that while you could push that power through stock injectors it would be dangerous to do so.
While tuners and vendors (who have to live with law suits, slander, etc) say that PD130 injectors won't go past 240 because that is the MAXIMUM SAFE LIMIT)
OP asked is this possible, not is this safe.But the safety is the key part! I could go out and shag the queen, but it would not be safe. So you say, no, you can't shag the queen
Already mentioned, neither myself or any of my friends have made this "major breakthrough". I am however, and so should other people, be in shock that this has been acheived, and no engines blew up!Well, good for you. I hope you feel proud that you / your friends have made this major breakthrough. The world will be in shock.
Maybe do things properly using proper hardware, instead of cutting costs.
The ONLY reason not to upgrade to +50/80 injectors is COST.
Haha, I'm not here to entertain you buddy, just here learn and share facts and figures that I found around the internet.You bore me.
Sounds quite much same, as I wrote I have 1Z engine with stock interiors and cheap mods doing 370hp/600nm+Can't believe I've had to write practically the same post twice in attempt to get this through to you.
Nice one Ryan. Would be interesting to see.Offer of a free dyno run here to compare, we can stick the Lambda and EGT probes in if required
compare that to thisThis is my T5 on the dyno running 40degs duration:-
https://m.youtube.com/watch?v=nPX09YJoTKY
And another one:
https://youtu.be/QLqMaoqVhsg
James Bond would be proud of that smoke screen!compare that to this
https://www.youtube.com/watch?v=jBo3E0ZV4lA&feature=youtu.be
laughable.
What's with the misfire at 23-26 seconds .
I can make that power but my PD has an extra injectors as its a 5cylis it possible making 270hp in stock injectors? yea it is. its safe? no its not
what is the big deal?
is it possible making 270hp in stock injectors? yea it is. its safe? no its not
what is the big deal?