the bad goodnews is you don't grow out of the need for speed

hc

 

yeah, it seems to me that the faster my car gets the slower I drive.. when my car was stock it was WOT a whole lot more than it is now.

Howard, a great Q&A page would really help this sitiuation.

I really think that I would like to run alcohol injection next year...

 

ooops forgot to mention Aquamist as to water injection and maybe 50/50. they have a fabulous site w lots of engineering and had a great big active forum that is currently shut down for repair. they built systems for some of the rally cars. Richard L is a key guy and has helpfully shared his expertise in our AI section.

howard coleman

 

re AI, there's the theory, the benefits and risks and then there's....

O K, i'm in now what hardware should i buy or fixture?????????????????????

given that we are trying to create the most helpful AI site on the net and of course just for rotaries i would like you to know that starting today a series of vendor specific threads will initiate... within the AI section. each soley devoted to a single vendor and his product. vendors are welcome to post what they wish our community to know about their offerings and especially with regard to actual experiences/data relating to the rotary.

users of specific systems are especially invited to share everything that they have learned form using a particular product.

comparative stuff like my product is better than yours will be very carefully scrutinized by me so we do not get into, well you know... there won't be any of that on the AI section.

and yes the will be a DIY section.

all in an effort to launch AI efficiently so we rotary guys can beat those piston guys.

howard coleman

 

yay!

 

Just another thing in the system to go wrong. God forbid your AI doesn't work right and you boost and lean out. YAY!

 

Oh BTW - I use AI myself, and it's proved to be a wonderful setup. Nothing bashing on it.. but **** happens (didn't happen to me) lol.

Turbobuick.. been there a few times, great side for AI.

 

this thread needs to be back up front and center. if you haven't read it i suggest you start back at page 1.

howard coleman

 

Albert, adding water injection without a leaner re-tune will reduce power. 14.7:1 is stochiometric, the ideal mix, where all the fuel is burned. ~12.5:1 is the most powerfull mix. Anything richer than that is used to cool the engine and will reduce power. Adding water or methanol is similar to running a richer mixture. Tune for 10.5:1, add water and you'll see a loss in power. Lean out to 12.5:1, add water or meth for cooling, and you'll see an increase in power relative to a straight 10.5 tune.

Pete

 

pick a thread....any thread

you can always get a different version of the "truth"

 

i can appreciate KX500FD's head scratching as to what is the truth w re to AI. lots of potential paths.

it is my opinion that the picture will come into very clear focus next year as many of us tune out and achieve major results.

AI offers not 18 psi but whatever your turbo makes... my setup make over 80 pounds per minute between 17 and 23 psi, the higher boost being a bit more efficient. i plan to run 23 psi on the street and i don't plan to warp apex seals and blow motors. as a matter of fact my primary challenge is to get my egts UP a bit...

here's the data from my last run... by the way i am big on data and not big on talk. that's the way the new AI section is being run... so it will be of HELP to you as we get into 07.



17.3-----------17.6-----------17.5-----------18.0---------18.0-------18.48 ------ boost

10.6-----------11.1-----------10.9-----------10.4---------10.3---------9.8----- AFR

16-------------21-------------17------------8-------------3--------------2-----PowerFC Knock

1125--------1117------------1179-------1190----------1201-------1234---Pre turbo EGT f

51-------------60--------------65----------71-------------81-----------86 Inj Duty850/1600

57------------59-------------56----------56-------------58-----------58------—Fuel Pressure

15-----------------------------------------------------------------Lead Ignition w 11degrees of split

4.2---------4.57---------------------------------------------------------------------------------TPS

57--------------------------------------------------------------- degrees F pre meth air temp

so what can we take from these 80 pump 20 methanol metrics?

I am running my 850/1600 (4900 cc/minute) base fuel injectors close to flat out at 86% duty cycle and an injecting another 1200 cc/minute of methanol.

Do you see any knock?

Do you see any high EGT?

yes, i am still in the tuning-up process and am rich. i will eventually get to 11.5 or thereabouts. bonus: probably will end up at 70% injector duty.

the next run after the above was cut short when my 285 rears went sideways at 60% throttle roll-on at 5600 in 3rd gear at 79 mph. i dropped my air pressure another 2 pounds and ended up exceeding the limits of my cerametallic exedy hyper single clutch. next up a double cerametallic.

meanwhile the motor is running cool and making gobs of power.

my Alkycontrol system has worked flawlessly and hasn't varied turn-on more than one tenth of a psi.

i am looking forward to spring and 23 psi.

that's my version of the truth.

for additional details visit the Auxiliary Injection Section and check out my tuning thread entitled "80% pump, 20% methanol." 8100 hits to date.

howard coleman

 

i was wondering if there was another type of alcohol that would run hotter, since you want your EGT's to be higher?

 

there are minor differences between the three alcohols (methanol, ethanol, isopropyl) as to the generation of a particular egt.

the key to tuning w alcohols and pump isn't much different than normal pump tuning... ignition and amount of fuel are a couple of primary components of egt generation.

i just need to work w the above factors as well as turning up the boost to 23 psi.

howard