NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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rfreeman27 12-17-2003 03:50 PM


Originally Posted by turbobrik' date='Dec 16 2003, 04:49 PM
No, it does NOT run all the time, it is a "shot" basis, just like nitrous and water injection.





I'm sorry for my lack of knowledge concerning wankel tuning. I was unaware of their temperature sensitvity. I sounds like you tune the engine for a specific ambient temperature and lock it in. With our piston motors its not a concern (at least its not a large enough one that you need to worry about it). But according to rfreeman27,



if you have the proper temperature fuel correction maps then it should work. But this is beyond my knowledge...



But there is not a lot of water/ice that melts. I dont get why you think its a huge amount. Water injection is considerably larger in volume of injection, and even when it does melt, its slow, not like somebody dumping a bucket of water and ice.

Actually the ice build up is a lot thinner than 0.050, but its hard to measure the exact thickness of ice, becuase its more of a "frostlike" buildup. And the depth when you look at frost on the microscopic level varies on ~200%.



It takes ~10 seconds for a complete "chill" but the the tubes are 0.030" thick copper, so the heat transfer begins almost immediately.





Turbobrik

Well, Rotarys are very sensitive to AIT changes, especally if its really hot. (heatsoaked)



I wouldnt take my word for it (regarding if it is safe to use) but that is the way i see it. As long as you have enough fuel to support it, it should be ok. I would like to hear from a more knowledgable person first though.

turbobrik 12-17-2003 04:09 PM

Concerning rotaries.....

I would like to hear from a more knowledgable person
me too

FikseRxSeven 12-18-2003 10:15 AM

well the way i see this...... is its 20 degrees outside this winter, and im running 12psi (however i dont have a way to monitor my fuel system's work load). so lets say its a hot summer day, and i use this freezer thing.... should bring me to about the same temps. plus cold air is less likely to detonate, so i guess you would be safer having a higher a/f than having a high a/f with warmer AIT.



(i think thats what todd tried to explain to me)



well reguardless, i dont have money and room to put this thing in my engine bay since i mounted my hmic.


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