Thanks for the info guys.

When I ran alky on my 03 I had a simialar set-up. Start spray at ~20psi and full at ~24psi. But why is that a safer way to do it Warr?

 

starting to spray at 20psig really defeats the purpose of the alky injection; you really want to inject before peak torque occurs - where knock is most likely to occur.

Put a good/fast reacting failsafe and use a on/off system and inject @~10psig....maximum spray where it really needs it most.

 

My Meth kit from TTP is pretty nice. It uses the factory washer fluid reservoir. The fail-safes are awesome, but they do cost a few bucks. I have a Veitronix system that monitors the Boost, TPS, AFR, and the EGT. When ever the AFR or EGT gets over a certain value of lean-ness (I know that's not a word), it sends a signal to a solenoid that opens the waste gate and cuts boost momentarily. When I first got the system, I ran the tank out of alcohol, and it worked as advertised. The fail-safes are adjustable by the user, so it's awesome. The Zeitronix also gives you the ability to log your values on a laptop.

 

That failsafe is much cheaper than a popped motor.

Glad that the failsafe works I plan on doing the same pretty soon.

 

I agree it does sound nice. Its the kit I have been keeping my eye on. I have tried the snow performance safe injection and it is worthless in my opinion. Both the inlet and outlet are on the same side so it makes install a PITA. It started leaking a week after install because of the extra fittings and the warning light turns on for a split second everytime the fluid starts spraying.

There is no safeguard better than one tied to AFR or EGT temps. It sounds like Kawrider has the safest kit there I have ever heard of.

 

What about a flow sensor, like the Aquamist DD3? Wouldn't it be better to cut boost when the alky system looses pressure, rather than waiting until things have already gone lean? Wideband gauges are lagging indicators of combustion events. It'd be better to drop boost as soon as the alky stops flowing.

I have an SMC system and am trying to figure out a failsafe before tuning for it. I'm considering both the TTP set-up as well as the Aquamist.

 

You could easily spend $250-300 in race gas in one weekend at the track.

 

the aquamist dds3 will drop boost to wastegate ~12psig when flow is outside the user defined window and of course tank level drops low.

too high flow:
-nozzle has popped off...hopefully, its caught b4 it gets sucked into the motor
-break in the line

too low of a flow:
-nozzle clogged
-kinked line
-pump or control electronics is failing

i got the zeitronix too...it allows either the upper OR lower limits, not a "safety operating window"

 

AFR safeguard is faster than anything I have seen.

I am pretty sure zeitronix has AFR too lean or rich settings also. (window)

too high flow:
-nozzle has popped off...hopefully, its caught b4 it gets sucked into the motor
TTP kits nozzle is mounted on the outside, the nozzle cannot be sucked in like some other kits. AFR protection covers this event.

-break in the line - AFR protection covers this event.

too low of a flow:
-nozzle clogged -AFR protection covers this event
-kinked line -AFR protection covers this event
-pump or control electronics is failing- AFR protection covers this event.

Even double the protection is available once the EGT protection is taken into account.

I have researched it all and this setup is bulletproof. I remember reading where you can run out of meth and run around town WOT with zero knocksums also. Crazy cool setup.

 

got almost everything covered except one....almost bulletproof

i have both of them and i'm comtemplating to either marry the zeitronix with the flow sensor or just run both as standalone

 

AFR supercedes flow sensors. What if the flow sensor circuitry malfunctions? AFR and/or EGT protection covers this.

 

does the ttp kit work w/ other widebands other then the zeitronix??? ie: PLX M-300

 

what happens if the wideband or type k thermocouple craps out on you?

flow sensor supercedes wb...its the flow of injectants(r-oh, a fuel) that alter your afr, not the other way around

 

egt failsafe would be a good idea.l

 

That's my point on AFR (and EGT, for that matter) being a lagging indicator. If your AFR reads lean or your EGTs are high, you've already subjected yourself to the detonation-prone situation. You can break a piston almost instantly with severe enough detonation. Waiting for AFR to go lean (or EGTs to skyrocket) is almost like waiting for a knock sensor to detect detonation.