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Rotary Tech - General Rotary Engine related tech section.. Tech section for general Rotary Engine... This includes, building 12As, 13Bs, 20Bs, Renesis, etc... |
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#16 |
Don Mega
Join Date: Dec 2008
Location: Utopia
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It is very common if you are dealing with a newbie or some wannabe cock smoker who is just reciting part information from the things I was speaking about 10+ years ago that you will get an inferior result.
Water Injection needs correct calibration, and proper system set up for supporting engine ancillaries, without the "whole package" of both parts and knowledge you will never get the full benefit of it and in many cases you will make you car package worse by applying it where it is not even needed in the first place ![]()
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#17 |
Don Mega
Join Date: Dec 2008
Location: Utopia
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That rubbish your duyo operator told you is just that!
If he had any idea he would have logged your boost pressure to wheel speed and engine rpm, like this........... ![]() or or ![]() Then he could pass on a nugget of information like he did lol......... based off some facts! not some bullshit comment based off his own ignorance and lack of basic knowledge! I have NEVER EVER seen any rotary manifold exhaust or intake on a turbo based motor cause that effect!.... I can only provide you with PROOF! not some bullshit excuse like he told you. On a positive note what I would suggest to you to narrow down the root cause is do some basic mapping of things like intake boost pressure trace and air fuel ratio to further narrow down root causes of your particular situation/problem. My quick opinion is it is due to the fact of your WM system and poor calibration to suit it.
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#18 | |
Don Mega
Join Date: Dec 2008
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Quote:
The real reason is the Air Fuel mixture in the mid range once the turbine is at full speed / full boost is it has too much excess fuel and this drowns the engine and your tq and thus power curve. The HKS DLI is a gutless piece of shit to be using on a water injected car PERIOD. If you need to keep it you will make another 50+rwhp more at the same boost by setting the AFR at a much more correct rate, assuming you have the right amount of WM50 going through the engine. For street cars and conventional set ups > There is a sweet spot on AFR that starts around 10.8:1 anytime you are below this you end up with dis proportionate power losses, and this explains your DIP *YOUR TUNER SHOULD KNOW THIS!* (NOTE). ***There is no magic answer though for this for people who want to copy or recite the info*** each and every set up is different as is the application, some I run AFR in the 8's or below! that an AFR instrument wont even properly measure the figures! and that is with water injection as well. But do you want to make 1100bhp from a 13B reliably using petrol??? are you running a spark system you could weld with??? Do you even need to consider such things????? If it bothers you then chase it, if not you will not fuck the engine because of it, just means it is a very safe set up, that is leaving a fair chunk of power on the table. The way it is it could run with or without the Water Injection so without knowing your personal situation that could be just what you want rather than chasing every last HP so you can compare cock sizes to random fagots on the interweb of gayness ![]()
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www.riceracing.com.au Worlds best Apex Seals Coil on Plug Water Injection ECU Calibration Last edited by RICE RACING; 10-13-2012 at 05:04 PM. |
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#19 | |
Don Mega
Join Date: Dec 2008
Location: Utopia
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Quote:
Now this is FUNNY! (well not for the owner!) I supplied my water injection system back in 2004 to a customer named Dale Helier and he was thsi shops customer, running one of his engines. I speced the system and so on, they cheaped out and ran some BS inductive boosters for ignition set up rather than the proper CDI I specify ......... anyway! They were mapping the engine a few days prior to Summernats National Dyno competition. they noticed EXACTLY the same dip this poster has seen. Upon the wise advise LOL from John Blanch he said it will make heaps more power without the Water Injection system so lets turn it off to get rid of the dip in mid range power........ well the engine DETONATED the first run!!! and totally fucked it self on the dyno LOL. The customer pulled out the motor and sent it to RX Engineering and they did a dodgy patch up job on it and over the phone told my customer Dale " I hate that Rice Racing ****, but his water injection system works, this time do not turn it off!" despite him being the one who suggest it LOL!!! My customer went to summernats and ran the car (I still have the video somewhere on tape I need to convert it) ....... it was the highest ever true pump petrol 13B to run at that controlled event and was only ever beaten by another car I engineered and developed 3 years later, still to this day never beaten let alone equaled. Now the moral here is John Blanch and his company (closed now!) RX Engienering claimed themselves to be experts in EVERYTHING and the best LOL just liek the false advertising of Microwreck computers (Australias #1 LOL) but just like what happened in REALITY these homeless high school drop out mechanics are nothing more than plebs with LITTLE knowledge let alone engineering skill to be using that name in a shop title LOL. Be very careful who you take advise from, make sure that they themselves have a car that runs and does what they say it can and that it and their theories HAVE BEEN PROVEN, just like the plethora of decades of examples I can achieve myself ![]() Shame on these worthless cunts.
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#20 |
FC3S
Join Date: Jun 2010
Location: Townsville, QLD, AUS
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#21 | |
Don Mega
Join Date: Dec 2008
Location: Utopia
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Quote:
![]() ![]() ![]() Up to 20psi and with the right excess fuel ratio they work ![]() When you want to roll with the big boys then its total arse ![]()
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#22 |
I have Ultra power in me.
Join Date: Sep 2011
Posts: 457
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I am thinking about getting your water injector kit for my FC after we noticed that my TMIC with my cheap carbon fiber hood is basically useless.
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#23 | |
The Newbie
Join Date: Mar 2008
Posts: 13
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Quote:
I understand the Map is going to be on the safe said but i'm just a little upset that the dip hasn't been tuned out tbh, if you look at the lower plot lines they are without WI and using a PFS SMIC as opposed to the Blitz FMIC that’s on it now, you can still see the dip in a similar place which is why i thought it may have been a fault with something rather than the tuner didn't bother to smooth it out. I don't pretend to know much about the tuning side of things which is why i use a Tuner ![]() Last edited by Grizzly; 10-14-2012 at 05:26 AM. |
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#24 |
Don Mega
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In that case I apologize for my comments as it looks like then it is not the WI causing your dip.
![]() Need to look into it further to see what is ultimately causing it.
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#25 |
Don Mega
Join Date: Dec 2008
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I watched it again and its not to do with boost as it is smooth enough, air to fuel ratio is at that 10.2 region where the graph is softest (step)... I'd say without seeing the 0.8bar runs that it is also running too much excess fuel at that point as well (around 5k rpm) then as the mixture gets to that magic 10.8+ region it steps up in power.
I'd be interested to see with a flat AFR ratio if that did not cure your stepped power band. I know in my own test car that even with a welders ignition that there is massive differences of power once you get over this "soft power" zone *excessive fuel richness*........ though in some applications you need that to ward off detonation. At your level of power with also with water meth it needs not be at 10.3:1 region, so I would get them to address that and see if that fixes the problem of low power at that rich zone in the mapping. Peter
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#26 |
The Newbie
Join Date: Mar 2008
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Unfortunately this is the Only other Info i got from the session. (Excuse the dumb coments on the Video)
![]() HP Map, you can see the step between 4500-5500. Its a PITA as the 0.8 bar line is in yellow and is hard to see (thats why i took a pic of it rather than scan as it doesn't show up at all) if it helps the 0.8bar peaks at 380hp at 6500rpm. ![]() Last edited by Grizzly; 10-14-2012 at 12:07 PM. |
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#27 |
The Newbie
Join Date: Mar 2008
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I understand its hard to Diagnose a car from the other side of the Planet
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#28 |
Don Mega
Join Date: Dec 2008
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Feel free to get some comments from the others here, but without seeing more information I say it lines up with the fuel mixture at those points being a contributing factor....... but like you say it is hard to diagnose from here.
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#29 | |
RCC Addict
Join Date: Mar 2008
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Quote:
With my experience and what most people tend to do... They try to run all "10's" across the board when it comes to AFR, just because they are paranoid of hurting something. I tend to run my AFR's a tad leaner in those low RPM areas, cause the engine is still picking up steam. Like I said before, detonation and engine damage is more likely to happen around peak torque. I don't worry too much outside of + / - 1,000RPM's of the peak torque curve. Just to pick up some responsiveness from the engine, I run the low RPM's areas prior to peak torque a little bit leaner and more aggressive on the total ignition advance. Like I said before also, I keep adjusting the maps until the power lines stop climbing on the dyno - some people can't grasp this basic concept of tuning. I have argued with idiots who claim: "oh, I can't go leaner than 10.5 AFR's because this other (questionable) tuner told me not to." [DOH!] I have run some customer's cars in the 4kRPM region as lean as 11.0 - 11.5 AFR's on a dyno wideband, and the engine is happy. (Keep in mind that every engine in each unique vehicle will be slightly different [in engine VE] no matter how much you try to duplicate a set-up, and this is why you need to tune each individually and maps will never be identical.) -Ted |
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