chaseb9

So my car has a stage 2 VC-50 30% meth 70% water, snow performance meth kit with a #5 nozzle under the supercharger on the flat plate. The nozzle isn't really that big so that's why I am a bit confused with my car bogging. I wanted to see what you guys think I should start my injection at. I had it set to start at 8 then ramp-up to full at 12psi as I read other posts and that's normally what people start at. My car has a fixed 77mm pulley so like a third throttle it already makes like 8 psi of boost.

When I do a WOT pull the car does not feel like it does without meth but when it comes to shift it bogs extremely hard. Any advice on fixing this? With people with meth, what do you guys use for a start psi and end psi?

black06c230

Did you check the spray pattern before putting back on?

I suggest that simply as mine recently after many years developed a obstruction and didn’t atomized properly and was more a stream than spray I am told. Symptoms were nearly the same so maybe check there.

chaseb9

I just fully redid the system so it shouldn’t have any obstructions I am aware of. I sprayed it out of the car and it seemed fine

E55Greasemonkey

At some point you'll realize all the time and money, and more time you've spent tweaking your meth system on the E55 will be a complete waste. You will not gain any power, and your quarter mile and 0-60 times will not improve. Right now you're in that second period of wasting more time. Trust me I've been there. Your progressive meth setup will never work right as our superchargers bring on near full boost at lower rpms. Ask me how I know. Your third round of wasting time will come later when something clogs, or debris gets in the system and holds your solenoid or check valve open and your engine sucks in the mixture under idle vacuum. Hopefully the misfires will give you a hint that this is happening before catastrophic engine damage. I should've spent the time and money on a small 35hp wet nitrous shot for cooling and the power gain. Maybe next time. At least I got a few hundred bucks for my system on Ebay.

oneslow55

100% correct,never liked meth never will as it's not consistent with afr and overall running .

C32owner

Have you got a wide band installed to monitor your AFR?

chaseb9

Yeah I have one installed.

C32owner

So when your meth kicks in what AFR numbers you seeing? And what size nozzle is it..

chaseb9

#5 nozzle car has around 600hp. My afr is already really rich cause it’s a base tune from raceiq so it’s around 10afr. I think I might need a dyno tune according to Anthony at race iq.

E42AMG???

Couldn’t agree more. I tried nozzles in every location, at one point I had #7 before sc and #10 after the cooler, never had any bogging issues. I tried 10% all the way to 100% meth and never saw a gain in quarter times. The only benefit you get is higher octane from the meth.

chaseb9

I wanted to update you guys on this. The problem was not the meths fault. I have a 82mm throttle body and with my stock trans tune it would shift and bog, it would just bog harder with methonal as it’s like letting off the gas when it comes to shift. Once I got my new trans tune all is good! Now spraying meth and no issues.

C32owner

Thanks for the update. As a matter of interest whose tcu tune did you go with?

chaseb9

https://mkultra-electronics.company.site/

From zerocat101. I did research on my issue and found out people use his tune to fix my exact issue

C32owner

OK thanks, ordered mine from there over a month ago. Still waiting for it to arrive with much excitement.

chaseb9

Oh wow that’s a long wait but I’m assuming you live out of the US. I love the tune to death it shifts so aggressively and really fast. Usually the car would do a pull and burn rubber just in first but now it shifts into second and continues to burn rubber!

C32owner

Yeah no where near USA lol. Only read good things about this tcu. Can't wait to play 😁