I'm getting knock with meth...

[StealBlueSho]

Here's the second meth tune... it looked much better I think.

Yes yes.. much better... I wouldn't be too concerned with those. I wonder what was changed...

[TopherSho]

Here's a pic of my throttle plate setup.

in the spacer .. that a neat idea actually.  what size nozzle @ what pump psi ?

[TopherSho]

the Spark is still on the low side in my amateur opinion.  Spark1  is 19 or so so avg and Spark2 is 21 or so on average.    The temp drop is not very rapid either.

The only thing I can see from my arm-chair is that the STFT peak reading is right in the middle of the knock +1 reading.  Now +1 is not actually knock .. so grain of salt that .. but the ECU is thinking it needs to pull based on other readings. 

[ddlopes]

Maybe that's the issue. Snow Performance offers the throttle plate for the F150. So I had one made. So what about the direct injection meth kits. They're injecting directly into the intake runners so they can't have much time to atomize. 

[ddlopes]

I did get gas after the 7th tune. But the 7th tune is when I started to get more knock. So not sure where the issue is

Here's the second meth tune... it looked much better I think.

Yes yes.. much better... I wouldn't be too concerned with those. I wonder what was changed...

[ddlopes]

I'm running (2) 175ml nozzles and not sure on what the psi is the Snow Performance pump. The primary nozzle starts to spray at 6psi and maxes out at 7psi. The power nozzle starts at 7psi and maxes out at 8psi.

Here's a pic of my throttle plate setup.

in the spacer .. that a neat idea actually.  what size nozzle @ what pump psi ?

[ddlopes]

Here's the 7th log where the knock started getting worse.

[lamrith]

Here's a pic of my throttle plate setup.

in the spacer .. that a neat idea actually.  what size nozzle @ what pump psi ?

It is def a cool idea for simpler install and one I am very curious about myself.  But I have a feeling it is leading to some of the problem as it likely does not atomize or mix the meth in the air as well.  It may require a slightly different tune to account for location/atomization.?

Back to basics though..
OP, Have you pulled the METH system or disabled it and run a non meth tune to verify if you have KR without the Meth being involved?  It would be a very good idea to verify your car's baseline situation to help narrow things down and get you rockin n rollin with Meth long term.

Maybe that's the issue. Snow Performance offers the throttle plate for the F150. So I had one made. So what about the direct injection meth kits. They're injecting directly into the intake runners so they can't have much time to atomize. 

True, but direct port injection you are getting equal meth to every cylinder regardless of atomization.  In a single nozzle, atomization has a larger effect on equal dispersion to all cylinders..

[TopherSho]

I'm running (2) 175ml nozzles and not sure on what the psi is the Snow Performance pump. The primary nozzle starts to spray at 6psi and maxes out at 7psi. The power nozzle starts at 7psi and maxes out at 8psi.

Here's a pic of my throttle plate setup.

in the spacer .. that a neat idea actually.  what size nozzle @ what pump psi ?

Default psi of the pump should be 270-285 with a max of 290-300.  your nozzle Combined output is 350ml which is LESS than mine (375ml) so you are at less volume combined.

so that leaves us ::
-gas issue
-sprays are not vaporizing enough
-spray jet-streams are interfering/colliding with each other and not vaporizing??  (pulling that one out of my a$$)

hmmm

how long have you ran the nozzles in the spacer for?  are their pauses or gaps in either spray if you run it for 30 seconds?

Conjecture :: I wonder if the power nozzle ramps up?  or is full on ?  .. maybe the spike and knock bump is from the second nozzle suddenly coming online ?

[AJP turbo]

I know you may hate to try this...But you are the only one I think that has the throttle plate adapter...Although it's very nice and clean looking it's making me wonder. ANd like SBS was saying maybe it's not allowing the meth to mix as well. I guess if you had the nozzles installed earlier in the intake tubing the meth and aircharge would mix more and be delivered more homogenously

Another thing I was thinking. I can change the knock sensor logic in the tune and you can add the DMR items in livelink for individual knock sensors 1 through 6 if they are available for your strategy and I think they should be...Then we can see if there is a certain cylinder or more that are recording the Knock retard.

If there is an odd cylinder do that then that may tell us that the meth is not mixed up well and it's a delivery issue possibly from using the throttle plate....So you could do that or relocate the nozzles to charge piping pre throttle body

[TopherSho]

I know you may hate to try this...But you are the only one I think that has the throttle plate adapter...Although it's very nice and clean looking it's making me wonder. ANd like SBS was saying maybe it's not allowing the meth to mix as well. I guess if you had the nozzles installed earlier in the intake tubing the meth and aircharge would mix more and be delivered more homogenously

Another thing I was thinking. I can change the knock sensor logic in the tune and you can add the DMR items in livelink for individual knock sensors 1 through 6 if they are available for your strategy and I think they should be...Then we can see if there is a certain cylinder or more that are recording the Knock retard.

If there is an odd cylinder do that then that may tell us that the meth is not mixed up well and it's a delivery issue possibly from using the throttle plate....So you could do that or relocate the nozzles to charge piping pre throttle body

^ The individual knock sensor DMR would be ideal .. +1 this a bunch!  /wave at AJP/

[ddlopes]

I've always run the meth with a spacer plate. The power nozzle ramps up just like the primary nozzle. Starts at 7psi and maxes out at 8psi. So its maxed out extremely fast. Yes the nozzles spray good for at least 45 seconds without any pause. I tested that already.

[ddlopes]

I just got off the phone with PROMETH which is the company that makes the direct port meth system for the SHO. They informed me that spraying meth while using a throttle body spacer is a bad idea. They actually tested using clear piping and verified that the meth was all being sprayed to the back wall of the intake. So I guess I'll be taking the hot pipes off again to have them setup for meth. Can someone send me a pic of their setup so I can find the proper location for the nozzles.... Thanks for all your help guys. I'll give an update once I get the hot pipes back and do some datalogs.

[TopherSho]

I want a clear intake manifold and throttle body!

[ddlopes]

My order of boostane just came in. I'd like to mix some in the tank to see if the extra octane cures the knock since the location of my meth nozzles isn't ideal and it's not providing all the cylinders an even amount of meth. Here's a link to a video of the product... Let me know your thoughts good or bad.

https://www.youtube.com/watch?v=MFUAWdoGrI0