Anyone running an injector referenced meth setup? Mostly boost referenced? How is boost referenced? (what sensor does it use?)

Getting ready to order a meth setup and just want to make sure I get the right kit for my needs.

If anyones running meth into an eaton/roots/maggie let me know as well. read some fuzzy stuff about rotor delamination a while back (the teflon/coating on the rotors being taken off by meth) anyone using water injection or is that the "old school" way now?

Thanks for the info!

 

Hobbs switch. you connect two wires and the circut is open, when you hit 3 psi (if that's the setting) the circuit closses and activates the relay or whatever...

 

Sounds simple enough. Need it mostly for the cooling properties when i get up into the 12-16#'s range. IATs are going nuts and if I'm going to over drive this blower anymore it's just going to get worse.

 

running an ECS meth kit and it uses a map sensor to progressivly increase meth flow based on manifold preasure, but then on the maggie it is pretty much all or nothing. as far as I know no kits measure air flow or adjust to the airflow so a hobs switch is about as good.

im injecting before the maggie and no issues yet if i develope issues later I just plan on a rebuild of the maggie.

 

What Eaton blower are you using?

 

Hobbs switch have a dead band issue.
Meaning you set it to activate at 3 psi and it doesnt de-activate till its under vacuum. This is why its done electronically. On decel it sprays and loads down the motor. may not be too big a deal with a fuel pump, but is with a meth system. Other problem is that its fixed voltage. So there is no tuning unless you like to swap multiple nozzles trying to get it figured out. And the pumps will cycle on/off/on/off when they hit their pressure switches eventually killing the switch or ripping the seals.

IDC injector duty cycle problem is you typically trim fuel to compensate for meth. So as you pull fuel out, it also pulls meth out.

MAF can be done. The only issue is if you max out the MAF you stop increasing volume. Most vette's max out the stock MAF at 550 rwhp.

SD.. using a MAP sensor. The system sprays according to boost. Boost = load so this is as close as it gets. Unless you run a MAF that can handle the airflow.

FWIW I make a converter to convert MAF freq to voltage. This is what is used on the C6 NA systems. So we can run the kit of MAF. But the flow limitation is why its not done.

Effective way is to use a voltage controller to run the pump. Need more alky.. increase the voltage. Need less.. reduce it. No more nozzle swapping. Then tie that in to a MAP sensor. Increase boost.. it runs harder.

Lastly the Vette is tunable. And a non-issue with a maggie and meth. Meth as in straight alcohol=methanol. Not water, windshield washer fluid, etc. You wont have any rotor problems with methanol. Cant say the same when you start using water. As water is thicker than meth and takes more temp to flash(disappear)

HTH

 

My meth system injection is based on both IDC and MAP.
And thanks Julio for the elucidation above.

 

Thanks for the great info Julio and everyone else!! I am thinking I'll run it referenced from the MAP sensor. In the specific application at hand a MAF would work fine as well, but I like the MAP route the best.

This is by the way not for a corvette, but you guys just have all the good ideas. My vette will have meth at some point in the near future, but not for an eaton, for the snails.