Thanks Kane--- appreciate the feed back. Seems pettit's offer with it's kit is designed to go with the flash they have for their s/c package. Makes sense now. I dont drag my 8--i track her and charge cooling would be all i would ever be interested in.
No doubt that meth/water has more potential than just that. But at a price.
I never thought anyone would want to run around the street or a road track with a renasis engine tuned to take full advantage of a meth/water injection system. Not that it couldnt be done It would just be too much to keep up with for the adverage guy.
oscd

 

I agree OSCD - but for a low cost; it would be nice for hot days or if you were going to hit a few spirited runs.

 

ooooo - great question Ray!

You would def need and want full evaporation (as that = full gradient change) - I think only empirical data will tell you how close to the "hot" gradient you can get and still max cooling...

Although higher temp would obviously aid in vaporization.

 

one thing i am wondering about is that if yu have the nozzle post-compressor, do you face it at an angle? i assume you would want even distribution, and even atomization to cool the temps as much as possible.

 

Again - I would argue no matter how you cut it Injection after compression will still be more efficient.

As for atomization - the more the merrier; that design is out of my league.

 

ok. well i have another Q. if you use water alone to inject, wouldnt it be bad if some of the water didnt evaporate?

i know, stupid question

 

yep we do- it comes down to you tune /tuner available. if you dont have someone near you that has experience with MAFS but he tune rings around a map all day then...


but having said that- you do not lose any granularity at the bottom end when going to a bigger MAF. MAFs are non-linear and there is plenty of resolution to go around. when changing MAF sizes you are simply changing the range you can measure.

If your thermometer goes to 100 and you need to measure to 150 you dont get a smaller thermometer that only measures 75. you get one that can read to 150 or higher. thats what you are doing when you move to a bigger maf.


everyone knows MAPs work but look around. MAFs are a better systems because they tell you how much air you actually have vs the educated guess of the map. MAPs are used in cars now as a cost saving measure.

With a MAP system you need to retune when ever you change something- change your intake - retune. change the type of filter for better flow- retune. with a MAF the tune tells it what to do with whatever amount of air it gets. It simply accepts the new reading and adjusts accordingly.

 

evo uses a MAF system

 

chet- no. if anything it'll help clear any carbon buildup you might have been accruing.

 

hmm. thanks

 

hmmm remote mount turbo MAF system with Meth injection install

http://www.supermotors.net/vehicles/...s/sts-a1-1.php

 

Nice!!!

 

Maybe it should have read "Boost Pragmatists".
It was mostly a jab at the dogma-stricken bunch in the other threads.

 

lol, yea, this thread is highly informative, sadly, I don't have a clue so I'll just shutup now and read

 

It always comes down to the tuner...


I never said anything about going to a bigger MAF sensor. I always discussed changing the tube size that the MAF sensor is mounted in.

 

even with just going to a bigger tube with the same sensor. but you do need to rescale your tuning to accommodate the % change in the cross section area

from openecu http://forums.openecu.org/viewtopic....2f6d75bfb93610

 

ok conversation ideas
1- bigger TB?
2- pettit uim=pretty good? (looks good to me)
3- disabling the vdi?
4- plugs? are most running all trailings? Gaps? Types?
5- new coils from Scott will be here soon! Speculation?
KDC--do they really use chickens on steroids?
oscd

 

I am still not sold on the MAF. The camaro example is running 7 psi. I have seen them around at the strip here. It is not a new thing. I bought a turbo of a mustang w/ a similar setup over a year and a 1/2 ago.

I read somewhere that the stock unit (MAF)can handle 47lbs per minute. That is slightly under the sweet spot on a t4 35R. Guys are making 500+ w/ a 4094R and having pretty good response w/ turbo lag. I truely believe it is a matter of time before you can get a renny there. I have a few ideas, but that is for another time.

I completely understand what you are saying about the MAF being able to handle changes. Either way in a FI (I am talking turbo chargers) a new flash would be required w/ any large change(injectors, turbo, so forth) on a MAF based system . Which is the same w/ a MAP system.

Appearantly I have tuned more cars on a MAP based system and this may lead me to be biased. I have yet to see a MAF system on any car runing 25+ psi of boost. All my experiences are in the rotary world on MAP systems.

I am not talking drag racing here. Having a 400+ car on a road course is what I call a great day. And lets face it you will need that much power if you plan to compete w/ what is around the corner in the sports car world. 400 today is the 250 of days ago. While our cars handle on rails we need power to compete.

I understand the Christmas tree in association w/ the changes you are speaking of. I believe there are possiblities around the corner. Some one correct me if I am wrong but I have yet to see a Mazda car that can be flashed for modifications the way Cobb does the STI. I know my mazdaspeed 6 cannot accomplish this and an aftermarket ECU was being developed last I looked. Again I am a rotary guy and my wife drives the 6. I believe anyone seeking large power goals w/ be using a aftermarket ecu to make the higher power levels. Seems to be the cards in the past.

 

so i know that there is a problem with our ignition that when you get into the higher hp numbers (400+) the ignition fails out. so as a corrective measure, cant we just up the voltage to the coils or isnt that the problem?

 

can you say why?

 

i was scared for a second there. ok i will look. thanks charles. i am just trying to keep this thread going

 

along with so many other topics.

 

Cobb is working on applications for the RX-8 (FI apps included) that will hopefully be released sometime next year.

Pettit Racing has developed a flash that works with their supercharger kit that is producing in the range of 300-310 hp. I'm currently running this and have exactly 0 check engine lights. Christmas, without the tree.

 

Charles can the stock ecu fire ls1 coils, or msd's or are we getting back to where I am going on the after market ecu situation again?

 

I can show you what I run on my track car. Let me know and I can email you.