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My First Dynorun..

nissan200sx.dk

By nissan200sx.dk,
in Engines & Forced Induction

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Dale FZ1 Veteran

Dale FZ1

Posted
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Have NO idea which rating the oct 95 is...

Mafia.

:D

These two little articles put things in perspective regarding Danish petrol.

http://www.mex.dk/uk/vis_nyhed_uk.asp?id=5...yhedsbrev_id=74

http://www.rec.org/REC/Publications/LeadOut/chapter61.html

I’m not sure if we still get MTBE in Australian produced fuels. It seems that the stuff was to be severely limited by pressuring the fuel companies. There was evidence of it being present 4-5 years ago thanks to Woolworths penetrating the fuel market

http://www.waterquality.crc.org.au/hsarch/HS23a.htm

http://www.abc.net.au/science/news/stories/s715002.htm

http://www.smh.com.au/articles/2002/07/10/1026185062263.html

A bit more quick research shows that the Danes use the same standard of octane measurement (RON) as we do. And if 98 is not readily available, then I’d be doing what it takes to eliminate knock that you’d come up against with 95RON and the sort of tune required to deliver the power he’s already got. Water injection sounds good to me. FWIW, best results should be had by integrating WI into the tuning strategy, rather than as an add-on. If you are prepared to give it a go, best results would come from running full load AFR up near 13:1 and give it the ignition timing that it will take. But it will require a properly engineered system to get the results.

The Mafia Grand Master

The Mafia

Posted
Posted

Dale makes an excellent point.

Have you looking into a Proper water\methanol injection kit like I am running? Fixed up all of my fuel issues. Then when we finally got 98ron here, it barely made a difference due ot the water meth already doing its job.

The Methanol injector idea sounds ok, but I think you need a purpose built system.

zebra Grand Master

zebra

Posted
Posted

After doing some research on water/Meth injection. It seems that Injecting the meth or water meth too early causes a dip in the power curve due to it basicly putting the fire out in the chambers so be wary of that. Mafia not sure on whether you had these problems or how you have yours set up.

Also on what your trying to set up nissan200sx.dk would that not cause pooling problems in the intake at idle and slow running if the meth inj is running all the time?

The Mafia Grand Master

The Mafia

Posted
Posted
After doing some research on water/Meth injection. It seems that Injecting the meth or water meth too early causes a dip in the power curve due to it basicly putting the fire out in the chambers so be wary of that. Mafia not sure on whether you had these problems or how you have yours set up.

I never had these problems, I actually put more water in down low to be able to put more timing in, and managed to get more grunt off the line. Only problem is you use more water so I backed the water off and took the timing out so it wouldn't ping under low load.

nissan200sx.dk Community Regular

nissan200sx.dk

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my methanol system will be pressure activated, and the methanol injector will only follow the duty cycle of one of the normal injectors. So i have a liniar delivery of the methanol. Will first try my own system out. If it dont works, or is to hard to adjust, because of variations I will look into buying a system. I guess i'll set the pressue activation at around 14 psi. That way I still need to be up in revs before the system activates, and still low enough for advanced timing without det. I hope, otherwise i can adjust at which pressure it should activate.

I think its more cool to build what you can yourself, try different things. Sometimes it works, sometimes it dont, and it can happen it sometimes says BANG. But its my way of learning... hehe. And is so much more satisfactory when it works, when its homemade.

Some say its just a cheap solution, but dont care. I like it. :blink:

nissan200sx.dk Community Regular

nissan200sx.dk

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Okay... could start out really low, and see how it goes. Thanks.

My old CA18 engine made 427hk with the use of methanol injection. It really helped alot.

On a different note. Nismo 16600-RRR60 injectors, are they the correct resistance for a RB25DET s1? I know they are top feed, std is side feed. But otherwise. Will be making a different fuel rail anyways.

nissan200sx.dk Community Regular

nissan200sx.dk

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Posted (edited)
hey mate, I'm still grabbing that ignition map for you too.

Hi. Dont want to press on too much, but any update on this? Got my fuel pump for the methanol system today.

Thank you very much.

Edited by nissan200sx.dk
rev210 Grand Master

rev210

Posted
Posted
Its my first attempt at welding alu... its not pretty, but works, and holds together.

Have a different on the drawing board, will be using shorter runners, and a different style plenum.

Thats a very bad design of plenum for even air distribution to all cylinders, as a result you may need to keep the AFR's quite rich for safety. I would get rid of that one as soon as you can. I know you put some hard work into it but, it's not helping you at all. :(

If you can fit the stock plenum somehow then definately change it back. :P

nissan200sx.dk Community Regular

nissan200sx.dk

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Posted

Why is it so bad? :P

The guy I bought my frontcut from, has a corolla 1.6 komp engine built with turbo, same design plenum and no probs at 500hk...

But will be making a different when I get the time..

Adriano Grand Master

Adriano

Posted
Posted

In my opinion, for that style of inlet manifold, that a pretty trick bit of gear, certainly better than a factory rb26 one. The only way to determine if there is uneven distribution would be to moniter individual exhaust temps/AFR's. The only way i think would be necessary to modify this would be to have a tapered plenum . Nice bit of fabrication though :P

rev210 Grand Master

rev210

Posted
Posted
Why is it so bad? :)

The guy I bought my frontcut from, has a corolla 1.6 komp engine built with turbo, same design plenum and no probs at 500hk...

But will be making a different when I get the time..

Have a look at forward facing plenums designed for forced induction engines as you see them in things like the RB26. They taper back accounting for the direction of airflow entry. They are also optimised around volume and a few other things.

Your plenum is a good first fabrication effort in anyones books all the same :P

Adriano,

better than an Rb26 plenum? C'mon mate. Thats just the beer talking. :wacko:

nissan200sx.dk Community Regular

nissan200sx.dk

Posted
  • Author
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I do have 6 exhaust probes ready to go in... had them in my last manifold, but my meter to get readings didnt work as first thought. :-(Got them From work, 200 AUD each, really fast and precise, can measure up to 1300 degrees. The meter I bought can be set up to display ALOT if different inputs.. If I remember correct the list has around 60 different functions for it.

But am working on a hole different solution in the long run.. Industri PLC with 40 in and outs (got that), need a touch screen, (working on that from work), and just alot of sensors to measure EVERYTHING i can think of. including the exhaust. Can design my own menu´s on the touch screen.

Also working on a pneumatic gearchange, controlled by the PLC... Have all the air cylender for it, but still working on design in Solidworks. Dunno how fast it will change, but hopefully it MAY control the clutch also.

Im in need of time.. Have a different exhasut manifold on the drawing board also, that will get the probes back again, and I can see if there is any issues.

Also has the different intake on the drawingboard... Which will have 6 intake temp probes.

Im gonna put sensors on everything when I get the PLC up and running.

fuel press, Fuel temps, gearbox temp, diff temp, 6 exhaust temp, 6 intake temp, after turbo temp, boost, oil temp, oil press, water temp, water press, AFR, tacho for the turbo, it will also control my methanol... Did I miss anything?

On a NA car I think the plenum has much more to say, on forced, its forced in.. I know there WILL be better or worse designs. But for working and not burning the engine, thes designs is working. So far...

Taper back.. How much has it to say on plenum design then? Anywere I can read up on this?

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