I am using a "safe injection" module from Snow Performance...basically, once armed...if my injection flow drops below 375cc it will send out a "trigger"

what to do with this trigger?!?! I've been on the fence for awhile...

original thought was to open a solenoid that puts compressor pressure on the wastegate...limiting me to spring pressure. Some think all this will take too long to bring me to a safe part of my map...and the fail safe should be full electronic.

so I began to think of a fuel cut...but the E6X doesn't have an input that cuts fuel, at least not one that I know of.

So, I thought to add a relay to my fuel injector circuit...normally closed on the R/G wire,

and when my "trigger" trips the relay, the power is removed from all my injectors...(we all know what fuel cut feels like) I **** my pants, and take my foot off the throttle, and once below the AI kick on point, my fuel injectors power source is restored and I investigate the problem.

anyone see any holes in this theory?

TIA

 

i'm not sure about the e6x, but on the e11v2, there is an option two have a switch that toggles between 2 different maps (spark & fuel) i havne't used it yet, but i was planning on trying your same approach (the snow performance flow "trigger") to toggle the swtich, where the second map would be highly retarded and much richer.

also, there are electronic blow-off valves, i forget what they're called, but having a trigger sent to that at the same time would be a pretty good system by my measure.

ryan

 

pop off valves or other BOV...I don't have the real estate on my IC pipes for that.

I was thinking about the toggle map too...which could work, since I haven't used the AUX-IN wire. I like the idea of not cutting anything for a fail safe...can't exactly cut the AI without complicating things...

so I should have a really retarded IGN map and stupid rich FUEL map for MAP 2. How should I test if the map is safe enough? too rich can detonate as well, no?

I'm not trying to run crazy boost, just a safe/protected 18psi with 93 oct in the tank.

 

doesn't the e6x have an ign or fuel trim.

the E11 can accept a 0-5 volt trim signal. Once configured 2.5 v would leave the ign unchanged, 5 v would advance the ign and 0 would retard, anything in between would scale.

What you could do for added saftey is alter your ign map to be where it is now while recieveing the 5 volt signal, you can use the ecu 5v sensor output. Then use a solenoid to cut the 5v signal therby retarting the ign by the full range. Not sure what that would be on a 6x but on an e11 its configurable and could be up to like 50 deg.

You could do something similar with fuel to add fuel.

 

^good idea...the E6X has Trim Control, which can trim up to 50% fuel and Spare input that can retard 8 degrees

these should be enough...I'll research this.

an output WARNING light would be nice to add as well...probably try to use my dome light (nice PIAA LEDs...hard to miss even in sunlight)

 

If you re adjust your map to be where it is now when the trim is on 100%, then when its cut to 0 it would give you 16 degrees. This would provide you an additional failsafe against problems, being that the trim could never be turned up.

The fuel trim idea might be better but I think it depends on what injectant your running. And yes tou defanatly need a warning light.

 

^ I like the "fail" fail safe method...

I think I could wire both to trip with the safe injection module. I will be injecting 100% water at first and then move to a 50:50 mix...then choose. but not 100% meth, due to my system components.


I noticed there is an AUX PRM limit switch.

I guess when grounded...you can limit RPMs to say 4500rpm, sort of a limp mode.

anyone with AUX RPM limit experience...I guess that is just a version of ignition cut?

 

thats for the 2 step right? Only thing I ever used that for was getting tailgators to back off.

 

sure you can use it for two step...but couldn't it hold rpms down in an AI failure as well.

 

re: rich can detonate too. . .how to tune that map safe. . .

just tune the second map (the failsafe map) the same way you would the primary map (the one with functional AI)

that is. . .completely turn off the AI, and tune to what you feel are safe EGTs/AFRs/knock with ONLY pump gas and that should be a safe second map i would presume. to be sure, I would make it a slightly conservative pump gas ONLY tune.

I'm not familiar enough with using the trim function to chime in on that, but what slo is saying makes sense to me.

I'm by know means an expert or tuning extraordinaire, so anyone else, please correct anyhting I've said or add additional idea, i'm sure everyone would appreciate it

ryan

 

This is my plan...I think I'll combine both idea's into one.

Using the trigger to operate a solenoid that applies compressor pressure to the WG/bypasses boost control AND trigger the dual map.

Here is some info on Dual Maps...(the trim idea just seemed a little too over the top when this is available)