Calculating my fuel flow- working out water inj jet size

Started by StavFC, June 11, 2009, 11:29:41 AM

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BenLewisMav

#30
Wow this is stupid guys.
I\'ve been a member of this forum for years now,and have also met a lot of the members in the flesh, knowing them to be top blokes who I have a lot of time for. I also know Stav and know that if you guys ever had this kind of conversation face to face you would know he was not trying to be a know it all or arrogant.
Completely unbiased, its just a bit of a misunderstanding, Prof was just trying to be helpful as usual, pointing Stav in the best direction he could, and Stav was just getting frustrated with what is quite a difficult thing to figure out, with no obvious answer popping up.
i just dont understand Nik\'s random comments (which got no warning from the mods and had no reason but to cause problems?), and they way that the mods jumped straight onto warning Stav about a tuning discussion between him and Prof (-Prof\'s been working with this stuff long enough to look after himself ;) ).
Regardless of whether he works for a magazine and therefore people think they know him or something, its a little bit bitchy and not the best introduction!

edit. Just to re-iterate: I don\'t understand what has Stav\'s car history got to do with anything? I don\'t dislike you or anything Nik I just don\'t understand why you said it, especially if you\'re basing your knowledge on a monthly magazine?!

Prof

The unreal thing here is that Stavros posted a question about how to work out his fuel flow - not what size jet he wanted.
 
QuoteAnyone know the rough fuel flow of a T04E\'d street ported 13B thats meant to have about 350-400bhp?

I did actually suggest a suitable answer on the first post, but was told that he didn\'t want to rate by horsepower...
 
QuoteI dont want to rate by HP, I want to know by CC/ML.
That HP thing wouldnt work with rotaries really if calculated on a piston engine, it wouldnt be THAT accurate anyhow, as it depends on the AFR and BPFC of that particular engine, and thats very different on a Rotary to a piston engine.

...yet this was the answer Blitzboy gave in a later post anyway - which is in fact what Stavros wanted to know.
 
QuoteBack to the topic, as its an Aquamist system , use the 0.7mm jet if just using it for a safety net for 400bhp

I work in a call centre and spend most of my day solving complicated problems with peoples backup software - so I belive I\'m reasonably qualified to understand what\'s meant by a question when it\'s phrased, and in particular, when someone reafirms what it is they are actually after - which apparently was how to calculate fuel flow to work out what water injection nozzle size to use.
 
I suggested the injector size calculator because even without knowing the injector size you have, you could at least get an idea of what cc injectors at what duty would give the power band your car has - and from that it\'s a simple matter of adding all the injector values together multiplied by the % duty - that would have given you cc/min - then from that you could have calculated the water nozzle you needed.
 
Anyway lesson learned - I\'ll probably not bother to answer next time :rolleyes:
"Plus this engine is probably one of the most volumetric engines going! It passes more air than a herd of cows eating vindaloo\'s" - courtesy of AtomicRex


StavFC

EDIT- Apologies, hugely smashed long winded reply coming up... :o
 
Prof- Seriously, I appreciate your help regardless, I honestly do, and the first reply was as good as right (ie 1.6mm, not exactly far enough away to matter) considering what my fuelling sums worked out (which was 1.7mm), but I wanted factual reasoning (as im not too confident with my sums), which I didnt really get (meaning it could be miles out for all I know), and then it all went wrong from then on.
 
I simply wanted to know what the fuel flow was for a 350-400bhp 13B was at full chat, and no replies gave it me (even that link, until BlitzBoy said what most fit), but I presumed experienced tuned 13B owners would know roughly the amount of fuel they flowing.
It was ok if people didnt know, unless you a techy tuning geek like me you\'d not know, and there is no harm in not knowing stuff, but if anyone did, replys would be handy.
 
I didnt want to annoy, antagonise, whatever, anyone on here, I wouldnt get anything from that, hell, im only here to help myself (as I have personally been heavily tuning turbocharged cars myself all my life, but always piston engines, rotaries are not quite the same), but when things dont help or are incorrect, surely you should point them out, rather than threaten to ban me, for the future progression of the UK rotary tuning scene???
I may be a noob to you lot, but facts are facts, they are science if nothing else, you cant blindly believe the world is flat just because the person who says so has a million posts and the noob who says the world is round has only a few.
 
Nick da\' Greek can make out he standing up for someone all he likes, but seems to have some kind of random George Harrisons stabber spec random hate for me prior to me joining here (from reading a monthly entertainment magazine, lol, REALLY nice insight in to my life, lovin your work), but getting personal on the internet about stuff he knows nothing about and someone he knows nothing about, is quite daft, and people "warning" me for the 100% facts I say back to him, considering he is going on about me like he even knows who I am, and I havent got a feckin clue who he is, is properly funny in a ridiculous double standards way...
 
Finally, fair play to Ben Lewis, the only person here who has met me in the flesh (and though I dont know him well, I have literally met him once in my life, is clearly a top bloke, and very helpful and knowlegable), to understand and give a real, non internet-spec, reply to this whole mess, and see this isnt some kind of stupid forum persona (which is maybe why i seem a bit short with people, as I know people who are giving it the biggun on here but would be much less rude in reality, which is silly, and im a nice person to people who are to me, but of course I would say when I know stuff is wrong, so people being goons on the net just because I disagree winds me up).
If you around your hometown Sunday Ben, ill drive down and show you the car if you like mate, though its honestly not that amazing, ill text you when I sober up 2moro! :Thumbsup! :Thumbsup! :wave
 
Righty, bedtime, hopefully when I wake up sat and hugely less smashed this will still read ok... :o