Questions about the stage 3 mpg-max™ boost cooler

[Chief Gilly]

Anyone using the Snow Performance Stage 3 MPG-Max Boost Cooler on their Mustang? I've got a 2000 GT w/ Vortech V3 and after-cooler. I'm interested in installing it because of the obvious more power and, for normal driving, better fuel mileage. I push @ 400 rwhp now with the return-less fuel system. I have a Division X 340 lph fuel pump which is pretty much maxed out at WOT @ 6200 rpm @ 11psi of boost on the dyno w/ 12:1 AFR at that boost level. I'm considering all options and I think the water-meth kit would solve/improve fuel injector duty cycle at WOT, better fuel mileage and of course a few more ponies. Going return style fuel system would not address all these issues and cost more.
What I would like to know is if the system is reliable? Do you see better fuel mileage under normal driving conditions? Does this require a new tune to get these results? (I assume a re-tune would be a good idea anyways).
Just looking for anyone's input on the idea.

Thanks in advance

 

[nono38]

I have the Snow Performance Stage 2 dual injection Boost Cooler.
Gain good power.
Have not been checking the MPG so I can't say if I'm saving gas or not.
Had the car dyno tune and it starts injecting when the car hits 3 psi of boost, so its rarely use for casual driving so I won't waste meth driving around town.
I like it and it keeps the intake cool and I like the idea that it also steam cleans the inside of the engine.
If you have a problem with the fuel injector duty cycle at WOT why not switch to a larger injectors.
This is my set up.
Return style walbro 255 in tank pump with a t-rex inline pump to 60 psi injectors.
Have well enough for over 500 rwhp.

 

[Chief Gilly]

I am still using the 39lb injectors from the Vortech kit. I just picked up some 60lb injectors and didn't install them yet. I believe with the stage 3 it comes with a controller so a re-tune is not necessary because you can setup when the meth injects. I was thinking if the octane is increased then less fuel would be needed hence the better fuel mileage. Right now I get less than 14 mpg babying the mustang around town. Do you know how much HP you picked up with the meth injection?

 

[nono38]

You could run the meth with out a tune but you will benefit more with a tune.
To actually see a major gain in hp you will need a tune.
Example.
I have multiple tunes.
I have two soft street tunes that keeps the car under 500 for causal driving to save gas.
one with out meth 398 hp.
one with meth 468 hp.
With a more aggressive tune you will gain way more power.
The tune you have now could also affect gas mileage if your block is stock.
Your tune could be running a little rich to keep the stock block safe.
Stock block is rated to 500hp to the crank.
If you're going to replace the injectors then you should get a tune with both upgrades.

 

[Chief Gilly]

You could run the meth with out a tune but you will benefit more with a tune.
To actually see a major gain in hp you will need a tune.
Example.
I have multiple tunes.
I have two soft street tunes that keeps the car under 500 for causal driving to save gas.
one with out meth 398 hp.
one with meth 468 hp.
With a more aggressive tune you will gain way more power.
The tune you have now could also affect gas mileage if your block is stock.
Your tune could be running a little rich to keep the stock block safe.
Stock block is rated to 500hp to the crank.
If you're going to replace the injectors then you should get a tune with both upgrades.

My AFR is 14.7:1 until boost. Stock internals. I was considering a 90mm MAF (still stock w/diablo), 60lb injectors and a new tune because I feel the tune may have something to do with the lousy fuel mileage. I'll probably go with the meth setup and just go for the new tune since the MAF and injectors will require it anyways.
Appreciate your input!!!