[dzenno]

Originally Posted by Big Tom

Did I understand this right? Is your kit flowing 850 x 2 = 1700 cc/min at 100% DC?

I'm quite happy with my timing right now, but the thing is that I'm having two nozzles (CM7 and M5) laying around in my garage, and it would be interesting to try a dual nozzle set up...

swap and datalog..i think you should always use the smallest and least number of nozzles possible to do the job right...say if you plug in a dual CM7 and see your IATs drop X and you can get it to a point where a bunch of 3rd gear pulls to redline see no ignition retard, try a single CM10 after (i.e. less flow) and see if you can pull off the same...i think former boosted played quite a bit with this and found about 220cc/min water in a water meth mix is best he found when pushing over 500whp on nitrous...obviously different setup but I think the approach was similar...in any case, when playing around at high boost I'd go big nozzles first an then slowly come down until you can find a happy nozzle to work with on a 50/50 meth mix for your daily yet aggressive driving style

[OpenFlash]

Originally Posted by Big Tom

Did I understand this right? Is your kit flowing 850 x 2 = 1700 cc/min at 100% DC?
EDIT, I think you meant that both your nozzles are flowing a total of 850 cc/min... Correct?

I'm quite happy with my timing right now, but the thing is that I'm having two extra nozzles (CM7 and M5) laying around in my garage, and it would be interesting to try a dual nozzle set up...
I'm on a single CM10 now.

Yes, both nozzles are flowing 850cc/min in my application. Go ahead and try the m7 and m5. Just try to keep them reasonably far apart if possible. And as upstream as possible. If you want to really optimize it, mount them in the outlet endtank in your Big Tom IC facing against the flow of air (head on) And use at least 75/25 meth/water mix for you application.

[Big Tom]

Originally Posted by dzenno

swap and datalog..i think you should always use the smallest and least number of nozzles possible to do the job right...say if you plug in a dual CM7 and see your IATs drop X and you can get it to a point where a bunch of 3rd gear pulls to redline see no ignition retard, try a single CM10 after (i.e. less flow) and see if you can pull off the same...i think former boosted played quite a bit with this and found about 220cc/min water in a water meth mix is best he found when pushing over 500whp on nitrous...obviously different setup but I think the approach was similar...in any case, when playing around at high boost I'd go big nozzles first an then slowly come down until you can find a happy nozzle to work with on a 50/50 meth mix for your daily yet aggressive driving style

I edited my previous post and I'm on a single CM10 (900 ml/min) now, but it would be interesting to see what a dual set up could do...

Here's the possible combinations:

CM7 + CM10 (1600 ml/min)
M5 + CM10 (1400 ml/min)
M5 + CM7 (1200 ml/min)

[PlutoniumTans]

Originally Posted by shiv@vishnu

Yes, both nozzles are flowing 850cc/min in my application. Go ahead and try the m7 and m5. Just try to keep them reasonably far apart if possible. And as upstream as possible. If you want to really optimize it, mount them in the outlet endtank in your Big Tom IC facing against the flow of air (head on) And use at least 75/25 meth/water mix for you application.

why facing against the flow ?

[J3NGOe90]

so what mpg u getting with all these mods

[OpenFlash]

Originally Posted by PlutoniumTans

why facing against the flow ?

Creates more turbulence which results in better atomization/distribution. Also, less crosstalk between the two sprays patterns. If you spray two high volume mists next to each other, they can become coarse/dribble when they overlap.

[dzenno]

Originally Posted by Big Tom

I edited my previous post and I'm on a single CM10 (900 ml/min) now, but it would be interesting to see what a dual set up could do...

Here's the possible combinations:

CM7 + CM10 (1600 ml/min)
M5 + CM10 (1400 ml/min)
M5 + CM7 (1200 ml/min)

I really wouldn't run more than a CM10...have you actually tried running your CM10 to a container and seeing what it flows...there will be some potential variance due to different components in the system from one car to the next...i' highly recommend that so you know what your "actual" nozzle you've got in there with "your" pump and meth line and flow sensor flow to the charge pipe...that's if you've got a way to run the nozzle(s) by turning on the meth pump 100% DC with the car off...with the cmgs I can run it in voltage activation mode and just apply 5v to it to turn it on

CM7 is around 600cc/min @ 200psi pump pressure
CM10 is around 800cc/min @ 200psi pump pressure

not including pressure drops due to checkvalve (if you're running one) etc.

[Big Tom]

Originally Posted by dzenno

I really wouldn't run more than a CM10...have you actually tried running your CM10 to a container and seeing what it flows...there will be some potential variance due to different components in the system from one car to the next...i' highly recommend that so you know what your "actual" nozzle you've got in there with "your" pump and meth line and flow sensor flow to the charge pipe...that's if you've got a way to run the nozzle(s) by turning on the meth pump 100% DC with the car off...with the cmgs I can run it in voltage activation mode and just apply 5v to it to turn it on

CM7 is around 600cc/min @ 200psi pump pressure
CM10 is around 800cc/min @ 200psi pump pressure

not including pressure drops due to checkvalve (if you're running one) etc.

Of course I've sprayed my nozzle in a container.
I use to to that 3-4 times/year just to make sure everything is working perfekt.
That's very important if you're asking me!

With my set up, spraying in a container always gives me the following numbers:

M5 = 500 ml/min
CM7 = 700 ml/min
CM10 = 900 ml/min

[dzenno]

Originally Posted by Big Tom

Of course I've sprayed my nozzle in a container.
I use to to that 3-4 times/year just to make sure everything is working perfekt.
That's very important if you're asking me!

With my set up, spraying in a container always gives me the following numbers:

M5 = 500 ml/min
CM7 = 700 ml/min
CM10 = 900 ml/min

Cool...I take it that those numbers are with the pump on its default settings? I wonder what happens when you tack on a second CM7 nozzle (so say a dual nozzle setup)...how much does it impact overall flow output with the cmgs pump setup...you have a solenoid not a checkvalve right? any filters in line?

[PlutoniumTans]

Originally Posted by shiv@vishnu

Creates more turbulence which results in better atomization/distribution. Also, less crosstalk between the two sprays patterns. If you spray two high volume mists next to each other, they can become coarse/dribble when they overlap.

Makes sense, I really like that Idea

[Jeff@TopGearSolutions]

BigTom you can definitely get away with a M5 and M7... I run an M12 currently without any hiccups hesitation or quench. It would likely be in my best interest do go to a dual nozzle setup for atomization purposes but thats for a different day.

[Big Tom]

Originally Posted by dzenno

Cool...I take it that those numbers are with the pump on its default settings? I wonder what happens when you tack on a second CM7 nozzle (so say a dual nozzle setup)...how much does it impact overall flow output with the cmgs pump setup...you have a solenoid not a checkvalve right? any filters in line?

I've increased the pump pressure a little bit and yes, I'm using a solenoid and inline filter.

As I'm on a Basic kit I'll have to measure the differences in flow by spraying in a container.
That's also the most accurate test if you ask me.

[Big Tom]

Originally Posted by Jeff@topgearsolutions

BigTom you can definitely get away with a M5 and M7... I run an M12 currently without any hiccups hesitation or quench. It would likely be in my best interest do go to a dual nozzle setup for atomization purposes but thats for a different day.

The problem is that I'm using a Basic kit, which will flow 100% at all time.
That could maybe cause some quench/bog @ lower RPM's, but since Hotrod are running CM7 + CM10 + A Basic Kit without any problems, I'm eager to try that as well...

[PlutoniumTans]

Originally Posted by shiv@vishnu

Creates more turbulence which results in better atomization/distribution. Also, less crosstalk between the two sprays patterns. If you spray two high volume mists next to each other, they can become coarse/dribble when they overlap.

Someone told me that putting the nozzles all the way at the fmic is not good, it's too far, but I guess I need to read more about this.

[Syndicategt]

Originally Posted by PlutoniumTans

Someone told me that putting the nozzles all the way at the fmic is not good, it's too far, but I guess I need to read more about this.

That is a false statement by someone wanting to sell you a meth elbow. Having the nozzels closer to the FMIC allows for better atomization and allows for more cooling of the charged air. Closer to the throttlebody has less of both, however, some claim the larger particles cool the cylinders down more. I think my 2 nozzels are about 4 inches away from the FMIC outlet and prior to the elbow. I would say larger nozzels should be placed further away to allow for better atomization vs. smaller nozzels.

[PlutoniumTans]

Originally Posted by Syndicategt

That is a false statement by someone wanting to sell you a meth elbow. Having the nozzels closer to the FMIC allows for better atomization and allows for more cooling of the charged air. Closer to the throttlebody has less of both, however, some claim the larger particles cool the cylinders down more. I think my 2 nozzels are about 4 inches away from the FMIC outlet and prior to the elbow. I would say larger nozzels should be placed further away to allow for better atomization vs. smaller nozzels.

Yes you are correct right after the fmic is the best before the 90 degree bend

[Jeff@TopGearSolutions]

Originally Posted by Big Tom

The problem is that I'm using a Basic kit, which will flow 100% at all time.
That could maybe cause some quench/bog @ lower RPM's, but since Hotrod are running CM7 + CM10 + A Basic Kit without any problems, I'm eager to try that as well...

So am I. Basic Meth kit. Basic DO boost switch. Set at 9 PSI. Just run atleast 70/30 Mix.

I can floor it at any RPM without hesitation. These simple setups are the most reliable and easy to troubleshoot.

[PlutoniumTans]

Originally Posted by shiv@vishnu

Yes, both nozzles are flowing 850cc/min in my application. Go ahead and try the m7 and m5. Just try to keep them reasonably far apart if possible. And as upstream as possible. If you want to really optimize it, mount them in the outlet endtank in your Big Tom IC facing against the flow of air (head on) And use at least 75/25 meth/water mix for you application.

How far from eachother would you recommend

[PlutoniumTans]

Originally Posted by Syndicategt

That is a false statement by someone wanting to sell you a meth elbow. Having the nozzels closer to the FMIC allows for better atomization and allows for more cooling of the charged air. Closer to the throttlebody has less of both, however, some claim the larger particles cool the cylinders down more. I think my 2 nozzels are about 4 inches away from the FMIC outlet and prior to the elbow. I would say larger nozzels should be placed further away to allow for better atomization vs. smaller nozzels.

Most people saying close is better, IDK

[Big Tom]

Originally Posted by Jeff@topgearsolutions

So am I. Basic Meth kit. Basic DO boost switch. Set at 9 PSI. Just run atleast 70/30 Mix.

I can floor it at any RPM without hesitation. These simple setups are the most reliable and easy to troubleshoot.

+1.
I haven't had a single problem with my simple set up.

[Big Tom]

Originally Posted by Syndicategt

I would say larger nozzels should be placed further away to allow for better atomization vs. smaller nozzels.

That's a really good thought.

I think I'll try to move my existing CM10 closer to the IC and place the CM7 in the old spot.

[PlutoniumTans]

Originally Posted by Big Tom

That's a really good thought.

I think I'll try to move my existing CM10 closer to the IC and place the CM7 in the old spot.

Everyone say different shit really, I've seen so many setup with the nozzle being at the throttle body with way more hp than our cars