It Made Me Laugh

[Baysidebluebnr34]

Have a read of it!

http://www.skylinesaustralia.com/forums/in...ic=109374&st=80

[Col-GTSX]

Whats funny?

I mean to say whats so funny about it that it needed a new topic???

[Baysidebluebnr34]

110 % duty cycle lol.

[Col-GTSX]

I aggree that there are a few posts in the making of a flaming...

But i do respect Dan and the work he does.

Maby you could pm dan or post in that topic for him to explain what he meant... As squizz did, I see why you both are asking your self how you can get 110% duty cycle, but i believe that i can see what dan is trying to say, and he has not used the best wording for it...

[The Dan]

I aggree that there are a few posts in the making of a flaming...

But i do respect Dan and the work he does.

Maby you could pm dan or post in that topic for him to explain what he meant... As squizz did, I see why you both are asking your self how you can get 110% duty cycle, but i believe that i can see what dan is trying to say, and he has not used the best wording for it...

Thank you Col.

And yes I could have worded it better but choose not to edit my post due to the fact it seems to amuse small minded people who have more dollars than sense.

[AzzurrA]

i've seen my injectors run at over 100% duty cycle before....

hell, they're running at about 90 - 95% usually... and the mixtures are still fine, and still have plenty of ability to flow more... i.e. the injectors are not running out of puff yet...

[gts-t 4 life]

Thank you Col.

And yes I could have worded it better but choose not to edit my post due to the fact it seems to amuse small minded pricks who have more dollars than sense.

Dont people like that just f**k you of mate wankers

Edited April 22, 2006 by gts-t 4 life

[Baysidebluebnr34]

please feel free to enlighting us to how we get over 100% duty cycle.

I think I know what you were getting at (Increase fuel presure to increase flow), it just sound funny wording it as duty cycle.

[The Dan]

Obviously you have never used a diagnostic tool before so I will explain.

When the scan tool does a calculation for duty cycle it measures rpm and injector timing then divides this value by 1200 to get a reading as a percentage.

For example. 6000 rpm with an injector time of 15ms will give you a duty cycle of around 75%.

Obvisously if you increase either rom or injector timing, the final value will also be higher, like 7000rpm with an injector time of 18ms will give out a reading of 105%.

Now just before you find amusement in that final figure I will explain this AGAIN. As I said to Col...I could have worded it better and taken the time to write out this massive message explaining myself to everyone about what I meant by 110%, but I thought...hmm hang on, maybe people who know me will understand where I'm coming from without me having to write out an essay.

I KNOW YOU CAN'T PHYSICALLY RUN AN INJECTOR AT 110% DUTY CYCLE...I'M NOT STUPID

However, you can run an injector at 100% and increase rail pressure to add more fuel meaning that a 260cc/min injector is well capable of over 280cc/min.

Thank you for wasting 10 minutes of my life....

Oh and next time you want to attempt to amuse people with your quick wit, or at least half of it, how about you quote me acurately as I NEVER said 110% duty cycle. I did, however, say that I ran my RB20 injectors at 110%. Think back to the post before that even...when I mentioned about pump flow.

Edited April 22, 2006 by 3lit3 32

[Col-GTSX]

Come on Dan getting a little flamey at the end there mate...

Thanks for being mature about this also Sam...

So we all understand it now?

[The Dan]

*says in unison with other kids in the class*

Yes Mister Col.

P.S Took out the garden hose and washed a portion of flame away to keep the peace.

Edited April 22, 2006 by 3lit3 32

[BelGarion]

so which is it?

bad to run your injectors at higher than 80%?

or ok so long as you have a shitload of fuel pressure behind it ie uprated pumps ect?

i remember being told a while back by a well known mechanic that theoreticly you shouldnt be running your injectors at their maximum performance figure

edit:- i understand that you CAN run them at 100% but is it safe and or wise to do so?

[The Dan]

so which is it?

bad to run your injectors at higher than 80%?

or ok so long as you have a shitload of fuel pressure behind it ie uprated pumps ect?

i remember being told a while back by a well known mechanic that theoreticly you shouldnt be running your injectors at their maximum performance figure

Theoretically, injectors should not exceed 90%. However, if the vehicle is set up with the right equipment and fuel system, it can run at 100% IDC as long as it has been tuned correctly.

There are some injectors that are literally restricted to about 60% IDC like some of the Gen II rotaries.

And, in fact....Honda run most of their cars at 100% IDC at WOT on redline, like the B16A Vtec for example.

For cars like Nissan Skyline/Sylvia/Pulsar, Toyota Supra/Soarer, Honda or any other good quality manufacturer, the injectors can happily run at 100% IDC as they are exactly that...good quality.

Don't expect your mums Excel or Lanos to be able to handle this kind of treatment lol.

The ECU loses all control of the fuel system once the injectors reach 100% IDC but as long as the car has been tuned on a dyno with an accurate A/F ratio meter, there is no reason why it cannot operate safely...provided that nothing else in the system fails. All it would take would be a blockage in the fuel filter to lean it out. So on one hand you can have no problems as long as everything is well maintained, or it can be devastating if one link in the chain breaks.

Does that answer your question?

[NismoGirl]

I can't see the future of this thread ending with lollipops and sunshine, so it's now closed.