Meth injection , Catch can

[Brew61]

Ok I just bought a 2014 Audi Q7 S-line 64,000 km. Now when I did my research I read about the problems with direct injection. So have been thinking what I can do to reduce the carbon build up.

First thing I thought about was the catch can method. Then reading that this can cause even more problems if you live in cold weather conditions in the winter. So that being out of the question because I do live in cold winter climate. But then I can also just disconnect it in the winter months. that can be an option. Any-one having success with this method? And what catch can system works best.

Second thing is Meth Injection. Now this sounds like a good thing to run because it should wash the intake side before the cylinders and keep them somewhat clean. Another thing with the Meth Injection I was thinking you could probably mix some Sea Foam into it to help a little more.

So is anyone using the Meth Injection and what system did you buy? How is it working and what are you using for mixture? I have read that you can just use windshield washer fluid, not sure how true that would work. How about winter months?

Thanks
Bruce

[bajan01]

I’m running an AEM 3300-30 system on my SQ5 with a 1000cc/min nozzle injecting directly after the throttle body. I had my PCV replaced in February and my intake valves had minimal buildup. That was at about 55k miles and about 10k of those were on W/M injection. I’m currently injecting a 50/50 mix of distilled water/methanol (VP Racing M1 Methanol). I’ll be switching to a Torqbyte/Snow Performance W/M controller in the near future. I won’t comment on winter issues as I live in Florida and never take the SQ5 up north in the winter months.

[Brew61]

I’m running an AEM 3300-30 system on my SQ5 with a 1000cc/min nozzle injecting directly after the throttle body. I had my PCV replaced in February and my intake valves had minimal buildup. That was at about 55k miles and about 10k of those were on W/M injection. I’m currently injecting a 50/50 mix of distilled water/methanol (VP Racing M1 Methanol). I’ll be switching to a Torqbyte/Snow Performance W/M controller in the near future. I won’t comment on winter issues as I live in Florida and never take the SQ5 up north in the winter months.

bajan01 thanks for your reply.

I have done a little research and so far the AEM is suppose to be good quality and little better then the Snow performance brand.

What I have read on both systems is that they say to install before the throttle body, why is it you installed your after? Also how did you determine how big of nozzle to use?

Why are you going to switch from the AEM to the Snow?

Sorry for all the questions, but if I am going to do this I like to get first hand information instead of what web sites tell you.

Thanks
Bruce

[bajan01]

bajan01 thanks for your reply.

I have done a little research and so far the AEM is suppose to be good quality and little better then the Snow performance brand.

What I have read on both systems is that they say to install before the throttle body, why is it you installed your after? Also how did you determine how big of nozzle to use?

Why are you going to switch from the AEM to the Snow?

Sorry for all the questions, but if I am going to do this I like to get first hand information instead of what web sites tell you.

Thanks
Bruce

The AEM setup is a well made kit and controller but I want to try injecting based off of rpm and boost as opposed to boost alone. I am quite certain that I am injecting way too much W/M too early causing the motor to bog down and then catch itself followed by a surge of power. This can be seen on my logs where the AFR goes pig rich and then the lambda controller struggles to correct this.

I’m working with Torqbyte using the Snow Performance Stage 4 controller which is essentially a rebranded Torqbyte CM5-LT controller that sprays based off of rpm and boost. The issue with this controller is that it needs a square wave rpm signal whic is not really a plug and play option with VW/Audi. Torqbyte has worked with me to solve that problem and I hope to get the controller installed this weekend and test it.



As far as what sized nozzle(s) to use, all the big name W/M companies have recommendations based on engine horsepower but ultimately you will have to experiment with different sizes and setting to figure out what gives the best cooling for your setup. Depending on your ECU tuning vendor your tune might also require a certain amount of W/M so ask them about that too...specifically EPL. I started with a 500cc/min nozzle and bumped up to 1000cc/min and saw better cooling from my logs. I’ll probably have to experiment with this new controller and see what works best for me with this new setup.

[Brew61]

As far as what sized nozzle(s) to use, all the big name W/M companies have recommendations based on engine horsepower but ultimately you will have to experiment with different sizes and setting to figure out what gives the best cooling for your setup. Depending on your ECU tuning vendor your tune might also require a certain amount of W/M so ask them about that too...specifically EPL. I started with a 500cc/min nozzle and bumped up to 1000cc/min and saw better cooling from my logs. I’ll probably have to experiment with this new controller and see what works best for me with this new setup.[/QUOTE]

bajan01

Thanks you for the information. Now for another question.

Do I have to have my Q7 retuned? I am mostly just looking at running this to help keep things clean. So I would probably just run the smaller jet. I also don't want to have to worry if I run out. I would just like to be able to shut it off if I am out and have no problems.

Can this system be run like that or am I going to have to go a lot further then expected.

Thanks
Bruce

[bajan01]

bajan01

Thanks you for the information. Now for another question.

Do I have to have my Q7 retuned? I am mostly just looking at running this to help keep things clean. So I would probably just run the smaller jet. I also don't want to have to worry if I run out. I would just like to be able to shut it off if I am out and have no problems.

Can this system be run like that or am I going to have to go a lot further then expected.

Thanks
Bruce

If your tune isn’t calling for it as fuel (or you are running a factory tune) then you should be fine just running it for cooling and/or reducing carbon buildup.

I’d start out with the 500cc/min nozzle and see what that does for you in terms of cooling and go from there but even that might be too much on a factory tune, I’m not sure. I’m currently running 50/50 W/M by weight so about 7 cups distilled water and 9 cups of methanol per gallon total.

When I installed my AEM kit I ran a switch in series with the switched +12V so that I could turn the system completely off if I needed to. Sometimes while flashing a new tune or just sitting in the car with the ignition on there is no need to have power to the controller, pump etc.

[Brew61]

bajan01

How did you install your nozzle? I have been looking for a Throttle body spacer but can not seem to find one. They make for the 2.0 and the 4's but nothing so far on the 3.0's

Bruce

[dsmmace]

I used to run Methanol injection on my old Talon AWD. 26+psi on pump gas every day was wonderful.

Anyway, I used an alkycontrol.com kit. Rpm and pressure based system. It was super easy to use and tune. Methanol should not be used to replace fuel, it should be used to cool down the charge and slow the burn(increase octane). Too much meth will result in a backfire if it pools up and it will mess things up (split my intercooler tank etc...)

I would buy an metal intake pipe and install a nozzle that way. I can't remember the company that makes an intake pipe for our Q7's.

[Chris@EPL]

The 3.0T engines are not that bad with carbon. And once you get done installing a meth kit and to keep buying and mixing meth you will probably spend more than just getting a carbon cleaning. Not sure how well it will clean the carbon that is already there. And you really do not want the meth kit to have an issue and hydrolock the car. Most people on here that run meth do it for the cooling and performance benefit and normally would not run it in the winter time.

[Brew61]

The 3.0T engines are not that bad with carbon. And once you get done installing a meth kit and to keep buying and mixing meth you will probably spend more than just getting a carbon cleaning. Not sure how well it will clean the carbon that is already there. And you really do not want the meth kit to have an issue and hydrolock the car. Most people on here that run meth do it for the cooling and performance benefit and normally would not run it in the winter time.

Yes I am still on the fence on this one. I have not planed on running the meth full time, maybe for a couple weeks out of each month just to do a wash of the intake canal. Not sure how many people with the 3.0 have had to do a carbon cleaning and how much it even costs or how often. So still researching, but the only thing I will be doing is a catch can forsure. Winter months up here are not bad, maybe 3 months where we could get some freezing temps but thats it.

Thanks
Bruce

[Brew61]

The 3.0T engines are not that bad with carbon. And once you get done installing a meth kit and to keep buying and mixing meth you will probably spend more than just getting a carbon cleaning. Not sure how well it will clean the carbon that is already there. And you really do not want the meth kit to have an issue and hydrolock the car. Most people on here that run meth do it for the cooling and performance benefit and normally would not run it in the winter time.

Talked with 1 dealer today, they said oh the 2014 models do not have a carbon cleaning scheduled in their maintenance program, that was enough with that dealer. So called another and they quoted me $1500 labor plus parts. So will contact a few more just to see what the costs are. Then I need to know how often owners are having to do a carbon cleaning. This is my retiring vehicle so it will be a 8 to 10 year deal so like to figure out what would be the best option to do.

Bruce

[BG SQ5]

bajan01

How did you install your nozzle? I have been looking for a Throttle body spacer but can not seem to find one. They make for the 2.0 and the 4's but nothing so far on the 3.0's

Bruce

iABED has TB plates for the 3.0T

Talked with 1 dealer today, they said oh the 2014 models do not have a carbon cleaning scheduled in their maintenance program, that was enough with that dealer. So called another and they quoted me $1500 labor plus parts. So will contact a few more just to see what the costs are. Then I need to know how often owners are having to do a carbon cleaning. This is my retiring vehicle so it will be a 8 to 10 year deal so like to figure out what would be the best option to do.

Bruce

If you’re not on it already, the B8 S4 forum is generally the best place to do any 3.0T research (especially w/m injection and carbon build-up experiences). C7 A6 forum may offer a little info as well, but the Q forums are pretty dead...

FWIW- the dealer will also tell you the trans fluid is lifetime as well

[Brew61]

iABED has TB plates for the 3.0T



If you’re not on it already, the B8 S4 forum is generally the best place to do any 3.0T research (especially w/m injection and carbon build-up experiences). C7 A6 forum may offer a little info as well, but the Q forums are pretty dead...

FWIW- the dealer will also tell you the trans fluid is lifetime as well

Thanks
Bruce