I like black and blue.. :P

 

thanks dude. i love it too. i still need to do something about the throttle body.....maybe even the UIM.

 

you may want to install a water meth kit while you are at it?
Nice looking engine.
OD

 

At this point, I am recommending that people NOT use water/meth on the Renesis.
You gain far more power/reliability/safety from just getting the tune right.
W/M generally causes an FI Renesis to lose power and increase EGT.

 

/\ And on that bombshell ...........

 

Not really a bombshell. At least not from this perspective.

Having tuned/accessed/dynoed/datalogged/etc close to two dozen FI Renesis applications with W/M, I have found that in every single case, the power loss that comes as the price tag for the "insurance" that W/M allegedly provides is greater than just tuning the motor to a margin that would preclude its necessity.
W/M in concentrations where it does not cause excessive EGT increases (near 50%), adds so much fuel value that it completely negates up to .06 lambda in the fueling calculations. This is not acceptable to me.
If you adjust the tune (timing and fuel) to accommodate the W/M, you completely negate its value as "insurance".

 

very interesting . Do you see any value in using it at very low doses ?
I was thinking of doing it that way if I ever got around to getting a kit .

 

With the Snow, AEM, CoolingMist and Devil's Own kits, I could never get the doses small enough.
Even with the finest jets and latest turn-on times, power always dropped and EGT climbed.
Because of the way air moves through the Renesis, even the smallest amounts of water quench combustion almost completely.

Once I got concentrations up to the point that combustion would continue, the fueling values would shift. At those concentration, the damage to the metal bits becomes a serious concern as methanol dissolves aluminum.

 

Very interesting stuff. So how much power loss on average do you see with using a 50/50 mix (on the same tune as running without)? In your opinion are there any situations where the charge cooling and octane boost would outweigh the potential damage to the engine from high EGTs and power loss like tracking or sustained high load driving in high temperatures?

 

keep it on topic guys. i do not plan on running W/M anytime soon, if at all.

my plans are to just keep a safe and reliable tune and not to push the boost too high.

 

all fits in with the zoom zoom boom theme .....

 

Someone start a new thread.

 

i'm sure there is one already......unless it has been locked.

 

There aren't any threads with useful information, other than Rich's excellent post from 5 years ago here:

https://www.rx8club.com/showpost.php...93&postcount=3

 

Bump?

 

 

 

what is the bump for?

update on nuke's car or more input on water/meth...?

 

/\ no idea . looked like a party was starting .....

 

Omen perhaps?

 

Don't say that man!! I was just curious if he got his car back and if anything has happened.

 

oh... i was more interested in w/m

 

I have pretty much determined that W/M is not necessary if you have a good tune. I have read a bunch of stuff and on the rotary the consensus is that it really is not that beneficial. I guess I can sell my BHR throttle body spacer now

 

from what I have read, not only is it not beneficial, but it has negative effects, specifically on EGT which would put more stress on the turbo and the motor. Last week I might have made another argument but this thread resurrection has changed my mind.

 

Yeah, I have read a few things and what is weird is how a lot of sites push the use of it without providing any real data.