lots of info on this on RX7Club by Howard Coleman including extensive pre-turbo EGT data

 

thanks for the reply. how many tanks of gas do you usually go through for those 2 months? also I assume that's street driving - on a track you would use quite a bit more, right? did you trunk mount your reservoir or did you use the windshield washer reservoir as double-duty?

 

is this any good? I plan to log both rotors egt

http://www.ebay.com/itm/110760615684...ht_2056wt_1040

 

Also what system are you guys using? Anyone using an Aquamist?

 

i do street use, and it depends on the usage of the turbo...if i boost alot, every single day, usually roughly 2 weeks, if you drive your car every single day and keep boosting it..
i also mount it in the trunk, with the pump lower location from the tank. usually you will get a tank with in a kit
i don't use windshield washer, i used 50/50 mixture

not familiar with the kit, but you can try doesn't hurt. worse come to worse, you will learn from the experience , but what i used is autometer i realized just now that my reading wasn't accurate because the probe lose, so i just fixed it now, and see you it is..and also MM had a link too, that one looks legit... try your self

i am using AEM..i bought when the first kit they produce, and the nozzle size that they had before was 133, 250, and 400..something like that, and i sued the smallest one,,,the 250 choked my engine and gave me less HP..
steven

 

Hopefully have another dyno soon showing another back to back, but this time with methanol, and tuning adjustments for the aux injection...

 

yep--same thing happened to me---why did the power fall off like that? Did yall just back off the throttle.?
What psi where yall at --about 7-8?
here is mine--showing the same thing:
https://www.rx8club.com/attachment.p...1&d=1322317101
later on I found out that my ssv was NOT opening during this dyno. I was at 7-8psi of boost.
the blue line is with my w/m on and using only a 75 nozzle.

 

water injection is not going to add power... the idea is to reduce the risk of detonation and therefore allowing you to run higher boost or more timing, this is where the power will come.

if not tuning for it it can only be used as a safety net.
why bother with these back to back dynos if nothing is being changed tuning wise?

 

My experience shows otherwise. Done it on multiple vehicles. Rx-8 is the only one I have ever done that loses power..

 

Was it pure methanol or a water/meth mix? Also what kind of ignition upgrades does the car have? Any EGT data for the runs?

 

mine was a 50/50 boost juice from Snow. I have the msd 8247 coils with denso 27/31 sparkplugs. No misfires. Basically I only use mine now for cleaning, track use. I do not relay on the system to help with octane. I use Torco accelerator for that.
The only way the w/m will allow for more power is it's ability to allow for more timing ( which the rotary really doesnt respond too that much--not like a recips) and/or more boost.
It was interesting that my a/f's did not chance at all. Not injecting enough--I guess.
We only did a back to back out of curiousity.

 

so why arent the people with water or water/meth injection trying higher boost levels?
turblown... are you saying that you are trying to tune with the water or water/meth?
have you tried turning boost up a little while it is running?

based on every other car in the world with a turbo you should be able to boost higher with the cooling and knock protection water offers.

i dont understand how you can say it losses power if you havnt tried high boosting it. ie something over 14 psi.
or are you saying that the water is not helping and you are still getting knocks so you have to leave the boost the same as before?

 

btw turblown, im still waiting for an email containing a quote lol.
has been a couple of weeks. i know you are busy

 

Can you resend it? I must have lost it. We got 5o to 100 emails a day.

 

i will do so soon.

 

Lets wake up a old thread.

My knowledge is limited, but could it be beneficial to run a relatively high pressure pump to get smaller water particles? Could that be the problem, that the fog has too large particles?

It would be great if it was possible to make water injection work, possibly skipping intercooler. Friend of mine who turbocharged a bike, could use max 0.7Bar without water, but 1.3Bar with. Thats a big difference.

 

Read:

RSR Water Injection Calculator

 

Read.
Great link, thanks!

 

Earlier in the thread, they show that you loose power, and MM said somewhere that EGT is raised with water injection, and that something extraordinary must be happening inside a rotary engine that he could not figure. I do not understand why he should go very wrong when there is experience from other cars wit similar HP numbers.

I haven't seen someone who have said/proven this wrong, have you? Maybe it has slipped my radar...

 

Hey guys, I'm a newbie. I'm thinking about running w/m in my nonaspirated 8. For a little boost in power, but mostly for the carbon removal. Is this a waste of time and money?