100% meth or water vs 50/50 mix
Sep 12, 2006, 11:02 PM
#16
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Originally Posted by Richard L
My first thought,
1) Knock is probably due to high egt.
2) High egt is the result of a slow burn or retarded timing.
3) Injecting water into a rich a/f ratio will produce slow burn.
Need some input form you:
4) What is the afr are you reading water injection?
5) What is your ignition timing at WOT
6) What tools do you use for alter your fuel and ignition?
1) Knock is probably due to high egt.
2) High egt is the result of a slow burn or retarded timing.
3) Injecting water into a rich a/f ratio will produce slow burn.
Need some input form you:
4) What is the afr are you reading water injection?
5) What is your ignition timing at WOT
6) What tools do you use for alter your fuel and ignition?
As usual .. great reply from someone who has a "vested interest"
--> in jest!Something I gotta give to Richard from ERL Aquamist (I'm a customer since 2002) he helps without asking why and he helps non customers
Richard, I get high EGTs with these parameters
1. water/meth being injected at 400-450cc/min
2. AFR at 11.6
3. EGT at 930C
at 7500rpms (probe located at collector just before the turbo)4. boost at 7500rpms 1.65bar
5. timing 23-25 degrees advance
6. the best ECU in the world .. stock
seems like this is the limit for me .. I go any higher timing and the ecu would pull timing .. but whatever it is .. my EGT is always around 900+
Sep 13, 2006, 09:47 AM
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Originally Posted by Richard L
My first thought,
1) Knock is probably due to high egt.
2) High egt is the result of a slow burn or retarded timing.
3) Injecting water into a rich a/f ratio will produce slow burn.
1) Knock is probably due to high egt.
2) High egt is the result of a slow burn or retarded timing.
3) Injecting water into a rich a/f ratio will produce slow burn.
Originally Posted by Richard L
Need some input form you:
4) What is the afr are you reading water injection?
4) What is the afr are you reading water injection?
Originally Posted by Richard L
5) What is your ignition timing at WOT
Originally Posted by Richard L
6) What tools do you use for alter your fuel and ignition?
Sep 13, 2006, 10:21 AM
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Originally Posted by nutrulz
11.0 AFR measured on a zeitronix
2 deg. ---> 8 deg.
AEM EMS
2 deg. ---> 8 deg.
AEM EMS
What system are you running and if you the flow per minute?
Richard
Sep 13, 2006, 10:41 AM
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Originally Posted by Richard L
Are those ignition timing relative to Top Dead Centre?
What system are you running and if you the flow per minute?
Richard
What system are you running and if you the flow per minute?
Richard
Yes, TDC. I am using the SMC system, the flow comes on at 8.75 psi, and tops out at 22 psi. I am using the #7 nozzle.
Sep 13, 2006, 11:44 AM
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Originally Posted by nutrulz
Yes, TDC. I am using the SMC system, the flow comes on at 8.75 psi, and tops out at 22 psi. I am using the #7 nozzle.
This a very strange, #7 nozzle can flow a great deal of liquid. About 450cc @100psi. Have you check the nozzle in the open air and see if it is blocked?
If you are running at those timings, you EGT will be sky high! I think checking the flow of nozzle is the first thing you need to do.
Sep 13, 2006, 11:45 AM
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Originally Posted by gunzo
As usual .. great reply from someone who has a "vested interest" --> in jest!
Something I gotta give to Richard from ERL Aquamist (I'm a customer since 2002) he helps without asking why and he helps non customers
Richard, I get high EGTs with these parameters
1. water/meth being injected at 400-450cc/min
2. AFR at 11.6
3. EGT at 930C at 7500rpms (probe located at collector just before the turbo)
4. boost at 7500rpms 1.65bar
5. timing 23-25 degrees advance
6. the best ECU in the world .. stock
seems like this is the limit for me .. I go any higher timing and the ecu would pull timing .. but whatever it is .. my EGT is always around 900+
--> in jest!Something I gotta give to Richard from ERL Aquamist (I'm a customer since 2002) he helps without asking why and he helps non customers
Richard, I get high EGTs with these parameters
1. water/meth being injected at 400-450cc/min
2. AFR at 11.6
3. EGT at 930C
at 7500rpms (probe located at collector just before the turbo)4. boost at 7500rpms 1.65bar
5. timing 23-25 degrees advance
6. the best ECU in the world .. stock
seems like this is the limit for me .. I go any higher timing and the ecu would pull timing .. but whatever it is .. my EGT is always around 900+
Last edited by Richard L; Sep 13, 2006 at 12:07 PM.
Sep 13, 2006, 11:51 AM
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Originally Posted by Richard L
Are you injecting pure water?
This a very strange, #7 nozzle can flow a great deal of liquid. About 450cc @100psi. Have you check the nozzle in the open air and see if it is blocked?
If you are running at those timings, you EGT will be sky high! I think checking the flow of nozzle is the first thing you need to do.
This a very strange, #7 nozzle can flow a great deal of liquid. About 450cc @100psi. Have you check the nozzle in the open air and see if it is blocked?
If you are running at those timings, you EGT will be sky high! I think checking the flow of nozzle is the first thing you need to do.
Sep 13, 2006, 12:14 PM
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A timing no less than 12 degrees is a good.
I wonder if your turbo reached it flow limit and just blowing hot air?
Would be nice to know what your inlet temperature is.
Have you tried a bigger water jet?
I wonder if your turbo reached it flow limit and just blowing hot air?
Would be nice to know what your inlet temperature is.
Have you tried a bigger water jet?
Sep 13, 2006, 03:23 PM
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It peaks at 22-23 and tapers very slowly to about 20 psi. I don't go over 7000 rpms very often.
My inlet temps before the water injection is about 90-110, it's been quite hot here in Reno, NV
My inlet temps before the water injection is about 90-110, it's been quite hot here in Reno, NV
Sep 14, 2006, 02:22 AM
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Dry desert air is great for water injection.
At what RPM does your knock occur?
SMC does not have any RPM compensation after the wastegate cut in. The only way you can tune out the knock is by injecting more water overall.
At what RPM does your knock occur?
SMC does not have any RPM compensation after the wastegate cut in. The only way you can tune out the knock is by injecting more water overall.
Sep 14, 2006, 08:01 AM
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Originally Posted by Richard L
Have you ever considering using a push pump to increase your current flow, I am sure we can do much better than what you have now.
did the pulse extender based on your inputs.. max I can push is 500cc/min with 1mm nozzle..
930C is beyond the melting point of aluminum. Are you sure its that high?