Ok guys, I have run the Stage 2 Snow Meth kit for nearly two years now on a 13 psi non-intercooled Vortech blown 5.3L with great results. The spray would knock a 160-170 IAT below 100* almost the second it started spraying....

A couple weekends ago, I installed the Vortech Aftercooler. Man, why the hell didn't I do this sooner... My issue was with timing pulls in mid-load prior to the meth spraying..... there are no such issues now with the aftercooler.

What I have noticed though, my IAT temps are now at 15-20* above ambient running around town.... my question surrounds going into boost and the IAT temps climb to about 125* to 127* at 11 psi.... I can turn off the meth kit and see basically the same thing...

What gives? why is the spray not knocking down temps any better with the aftercooler? nozzle placement? spaying into a cooler tube?

My mix right now is 40%/60% meth/water, with a 625ml nozzle on a 150 psi pump. Should I just delete the water and run full meth? I tune my own with HP Tuners on a 2 BAR SD OS, so I am aware the straight meth will require my VE retuned up top... I am also aware of the advantages of timing gains with the kit....

I just want to kick this issue around a bit and hear what others have to say...

My truck.... http://good-times.webshots.com/slide...58718396zMByDq

 

Try spraying just water. It has the capacity to absorb more heat. You will need to tune for it though.

 

Yeah, just play with 100% of either or.See which you like. I have never noticed any benefit from just water. Others have. I run 100% meth and never really noticed too much IAT help, but tons of octane help.

 

meth should drop the iat's even with the aftercooler. i would check to be sure it is really spraying. i have my aftercooler, then the meth nozle, then the iat sensor, then the tb. when i spray it is very easy to see on the log and the iat's go well under ambiant.

13psi is prety high for pump gas and no meth even with the aftercooler. that is if your meth isn't working.

 

I don't look for the IAT drop. I think the biggest benefit happens in the combustion chamber, pulling excess heat plus an octane boost if you're mixing meth in it.

I've always used it on a pump gas build, with and without an intercooler. Always lets me run more boost/timing.

Jody

 

i agree the drop in iat's may or may not be where the benifit comes from but they are a good indication that the unit is working properly.

 

I pulled the nozzle the other day after logging and blew into the variable controller..... Yep, the shower works.....

I am just amazed at the amazing difference in what it does non-intercooled vs intercooled.....and for what it's worth I am seeing 11.5 psi now on the HP Tuners log..... Lost about a # and a half through the aftercooler...

Knowing that it is spraying, and seeing IAT's climb during the entire pull is disquieting to say the least... even if it is only to 127*.......

I am just used to seeing this thing drop IAT's 50-60* instantly before.....

 

is the iat sensor after the nozle still.

if the iat's are not droping i would really question if it is working.

looking at your pic's is that the sensor on the inside corner after the intercooler and nozle? if it is there is a chance all the meth is just being pushed to the outside of the corner and not hiting the sensor.

 

I agree. I only said that because some people think the temp drop is the only benefit, and if they don't see it then they think the water/alky doesn't help.

I use it on pump gas to try to narrow the power gap between pump gas and race gas. Without the water/alky injection I have to be very conservative on boost/timing, especially here where we can only get 91 octane from the pump. With it I can almost make as much power on pump gas as on race gas, or at least the gap is much closer. Hate leaving all the power sitting on the table since I spend 99% of my time on the street.

Jody

 

As I said in the original posting I fully understand the benefit I receive from the meth/water injection as it pertains to timing/boost. I would not have been able to run 13 psi at 22-25* timing on a daily driven truck making 650 hp for two years without it....... on 93 octane.... in 100* Florida heat. I tune my own truck so it is hard not to understand the benefit....

back to the question at hand.... I thought about the airflow when I relocated the nozzle and sensor in the aftercooler. It is pretty much the same setup I had prior to the aftercooler install, the difference being one additional elbow in the intake tube due to the aftercooler.. attached pic shows the before and after locations of both nozzle and sensor...

I agree I should be seeing IAT drop... I have for two years.. that is what is making me nervous.. I am used ot seeing this setup drop 60* instantly....

I am replumbing the intake to the blower next weekend from the CAI... I might try moving the IAT sensor to the outside of the pipe across from its current location....