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panda340i panda340i is offline
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Default WMI VS CPI - 09-02-2019, 11:53 AM

Has anyone swapped there WMI for CPI? I running PS2 with WMI with E50 in the tank. I was thinking CPI would be smoother...


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Default 09-02-2019, 10:24 PM

I would think there is no point. Only benefit is you don't have to buy meth all the time since the CPI taps into the fuel system. Are you running E50 in the car gasoline tank or in the actual meth tank?


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Default 09-03-2019, 05:24 AM

I'm running e50 in the main tank and X98 in the meth tank


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Default 09-03-2019, 06:36 AM

Quote:
Originally Posted by panda340i
I'm running e50 in the main tank and X98 in the meth tank
I been wanting to try X98 in the meth tank. What are your thoughts?


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Default 09-03-2019, 09:43 AM

CPI better if you have e85 access. Methanol if you don't have e85 access lol.


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Default 09-03-2019, 10:44 AM

Quote:
Originally Posted by Payam @ BMS
CPI better if you have e85 access. Methanol if you don't have e85 access lol.
Payam since he's running X98 wouldn't the meth setup be more beneficial since its a higher content of ethanol spraying inside the engine?


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Default 09-04-2019, 10:23 AM

Quote:
Originally Posted by dRDiesel
Payam since he's running X98 wouldn't the meth setup be more beneficial since its a higher content of ethanol spraying inside the engine?
Not if you have the ability to run full e85 and no supplemental pumps and tanks needed

I'm running CPI on my M5 and my Turbo S.


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Default 09-04-2019, 12:17 PM

so you would swap the meth set up for CPI. I like the idea of not messing with the getting meth. Would you run straight e85? I'm running e50 at the moment


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Default 09-04-2019, 02:10 PM

Quote:
Originally Posted by panda340i
so you would swap the meth set up for CPI. I like the idea of not messing with the getting meth. Would you run straight e85? I'm running e50 at the moment
Yes, exactly. No more filling the methanol tank, or worrying about it etc.

I have CPI now and just fill up either e50 blend or full e85.
Daily I do e50 blend, when I go to race event I to full e85 and change a few values for the CPI to add more fuel. Simple


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Default 10-01-2019, 11:12 AM

Quote:
Originally Posted by Payam @ BMS
Yes, exactly. No more filling the methanol tank, or worrying about it etc.

I have CPI now and just fill up either e50 blend or full e85.
Daily I do e50 blend, when I go to race event I to full e85 and change a few values for the CPI to add more fuel. Simple
Why not run both MWI and CPI?
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Default 10-02-2019, 09:37 AM

Quote:
Originally Posted by ecarver2
Why not run both MWI and CPI?
Not needed, pick one lol. They do the exact same thing.


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Default 10-03-2019, 09:12 AM

Quote:
Originally Posted by Payam @ BMS
Not needed, pick one lol. They do the exact same thing.
But CPI is better since it can dynamically add fuel, rather than the BMS WMI kit, which is basically on/off?
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Default 10-04-2019, 09:49 AM

Quote:
Originally Posted by ecarver2
But CPI is better since it can dynamically add fuel, rather than the BMS WMI kit, which is basically on/off?
No, the WMI controlled with the JB4/FSB does the same.
It just depends what's easiest for you based on fuel accessibility.


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Default 10-04-2019, 10:52 AM

is there CPI out for the B58? where do I get one or how is it different from WMI I have access to e85. not sure what route to go


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Default 10-04-2019, 02:29 PM

Quote:
Originally Posted by jovonni31
is there CPI out for the B58? where do I get one or how is it different from WMI I have access to e85. not sure what route to go
B58 Charge Pipe Injection (CPI) Kit - FUEL-IT!


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Default 10-09-2019, 03:13 PM

Quote:
Originally Posted by Payam @ BMS
No, the WMI controlled with the JB4/FSB does the same.
It just depends what's easiest for you based on fuel accessibility.
My personal experience is PWM is not working well in v14 FW, flow is lower even when you set it to 100, and it jumps all over the place, however if you disable PWM it is stable and higher flow. I would not recommend PWM for v14. Old FW it did work very well however. Also the RPM trigger control is not working for me either. It will come on at 2000 RPM or whenever boot hits teh threshold setting and throttle over about 80% regardless of that the meth trigger settings like RPM are set to.
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Default 10-10-2019, 10:34 AM

Quote:
Originally Posted by RMM
My personal experience is PWM is not working well in v14 FW, flow is lower even when you set it to 100, and it jumps all over the place, however if you disable PWM it is stable and higher flow. I would not recommend PWM for v14. Old FW it did work very well however. Also the RPM trigger control is not working for me either. It will come on at 2000 RPM or whenever boot hits teh threshold setting and throttle over about 80% regardless of that the meth trigger settings like RPM are set to.
Please post some logs so we can take a look.

Do you have logs on previous firmware to compare?


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Default 10-11-2019, 07:46 AM

ignore the 2015 date these were all done in the last 2 weeks

-on the v11 runs the RPM trigger looks to work and the PWM control is stable
-on the V14 runs there is no RPM control, and the PWM jumps around

I did measure the actual PWM duty cycle with oscilloscope and I did confirm that the PWM signal to the pump is dropping I even saw it drop to 20% at some times in v14 when it should have been 50% for example, and down to 50% when it should have been set to 100%, so what is shown in the log is really happening at the pump

also note that when I disable PWM in v14, the actual pump PWM is totally stable at about 95% over the whole pull, with a 100ms ramp up and ramp down in the PWM signal, when it turns on and off, however personally I would not ramp it off, I would only ramp it on, if your off throttle I would just cut it immediately, but maybe there is reason for the ramp off I am now aware of

Last edited by RMM; 10-11-2019 at 07:55 AM..
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Default 10-11-2019, 01:46 PM

Quote:
Originally Posted by RMM
ignore the 2015 date these were all done in the last 2 weeks
Not really practical to evaluate on a thread but if you want to email in a couple examples I can look over it when I have the firmware in front of me to see what might account for the difference.


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Default 10-11-2019, 06:53 PM

posted in support a week ago with 3 example as well , can you check that or you will only respond by mail

"v14 PWM meth control unstable - 09-30-2019, 12:37 AM"

v14 PWM meth control unstable - N54Tech.com - International Turbo Racing Discussion

Last edited by RMM; 10-11-2019 at 07:01 PM..
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