I'm looking at getting either the new AEM unit, or the Stage 2D Snow kit.

I'm new to meth, but can anyone make any recommendations on these two kits?

Obviously the AEM is brand new, but would it be worth the risk trying it out? Or should I stick to the tried and trusted Snow kit that's already been proven?

Either way, everyone's input would be greatly appreciated as I'm wanting to purchase a kit ASAP

 

there is really no advantage going with a 2D system and are impossible to tune right....

https://www.evolutionm.net/forums/sh...d.php?t=290756

take a few minutes to read thru the thread, especially the last few post in there

 

I'm sorry Abner but I'm going to have to disagree with the part of your statement highlighted in bold above. Tuning a 2D system is far from impossible and quite frankly, there's nothing difficult about it if you know what you're doing.

I'm speaking from personal experience of course. If that's the case for you as well, then I retract my statement. But if you're just parroting something you've heard or read, then I think you're out of place for posting that.

 

can you tell me what is the settings on your controller box?

if you got data logging capability, could you post datalogs of AFR/boost vs. RPM - ~3000rpm thru redline WOT, 1st thru 5th/6th.

 

The settings on my SMC controller were as such.

Start spray point= 11-12psi
Full spray= 17-18psi

Here are some screen shots of a log from my visit to the drag strip back in November of '06. This was ran with the stock turbo on 93oct and 100% meth injection. Boost peaked anywhere from 25-28psi and fell to 22psi just after 7k rpm. I ran an 11.9@117mph this pass fyi.

DSMLink EMS Legend

AEM35Bar= 3.5 bar MAP sensor
TEWBLin= wbo2

1st Gear: 4700rpm, 28psi, 11.5:1



2nd Gear: 5800rpm, 24.7psi, 11.6:1



3rd Gear: 5900rpm, 25psi, 11.6:1



4th Gear: 5600rpm, 26psi, 11.6:1



4th Gear: 6600rpm, 23psi, 11.4:1



4th Gear: 7200rpm, 22psi, 11.5:1



The AFR varied between 11.4-11.6 at wot throughout the entire run. The only exception was the spike to 11.9 in first gear when I lost traction for a split second. I had no difficulty what so ever tuning this in regards to running a progressive pump system.

 

So which kit would you recommend I get?

I want the Aquamist, but I don't think there are any left at the $495 price

 

You did a find job on tuning the SMC PPS system. I have a few questions if I may. What size jet are you using?

If it is at all possible, logging the AFR from low RPM of 1500 on forth/ffith gear would be interesting too. The plots appeared to be all at WOT.

 

hman, could you have mistaken this data log for something else? These logs are lacking the "tell tale" symptom of a meth injected car...symptoms that cannot be tuned out unless you run a very specific setup.

 

I was running a M10 jet with the stock turbo.

Unfortunately I have sold off my meth injection system and have plans to put the car up for sale in the coming weeks. I don't have any logs starting at 1500 in any gear anyway. I would always start around 3k right before spool up. I could maybe dig up a 3rd gear pull starting in the 3k range to redline if you want.


I'm sorry but there is no mistaking this log. If you take a look at the top of the window in all of the screen shots, you'll see the date "11-12-2006-2" right before the .dat. I have my time slips from that day showing the same date. I would be more than happy to post it up. In fact I will.

What are the "tell tale" symptoms you're looking for or expecting?


11.9@117 ran on 11-12-2006

 

would you happen to have a pic of your setup - showing the location of your nozzle? and you run a solenoid valve with your system?

 

Here is a link to a pic from my 50 trim thread. I do not have any pics showing the engine bay back when I was running the stock turbo in case you were wondering. You can clearly see the SMC nozzle assembly mounted to the uicp. I did not run a solenoid valve. I ran the check valve that comes with the SMC kit.

Engine bay pic

 

what sucks is i cant even find the AEM kit to look at it.. is it on their site?

 

http://media.putfile.com/lag-20-33

you are missing all the "rich dips" when shifting/boost drops...especially when you let off at the end of the run

those 2 nozzles combined in vid = a M10...a lot of meth being sprayed

 

Well all you had to do was be specific in your question so I knew what you were getting at. The screen shots of the log in my above post do have the afr rich dip at the end of the run. It just isn't shown in the screen capture. Here is a shot of the end of that same run showing the afr dip rich due to running a check valve.



The reason there were no rich dips between shifts is because I was using DSMLinks no-lift-to-shift feature. TPS was 100% until the finish(throttle floored the entire run). This kept boost above ~15psi during shifts. Under normal shifting, I would get roughly a .5-.7 dip in AFR as boost came back up after a shift. Then AFR would quickly level out at my target value.

The rich dip at the end of a run could easily be solved by running a solenoid valve at the nozzle triggered to open and close off a boost value.

As for the rich dip between shifts, this is where I agree with the first part of your original statement. This is possibly a disadvantage of a PP system. Although the car doesn't stumble/bog and the AFR doesn't go rich enough for me to be concerned about. I would assume a system using a HSV triggered off IDC%'s would be more effective in eliminating this.