S300 boost control w/ AEM Boost Solenoid

s300 and SManager software questions & answers
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turbo R
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S300 boost control w/ AEM Boost Solenoid

Post by turbo R »

i don't get the difference between fixed duty cycle and gear based duty cycle. i tried setting the duty cycle at random numbers ranging from 10 to 25 boost is not increasing past the normal 14 psi. i don't even know what numbers i am supposed to put in pressure vs. duty cycle. also, what effects does solenoid activation pressure have on this? thanks a lot for the help.
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Spunkster
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Post by Spunkster »

In Smanager, go to Help, and click on Contents. In the search tab type in "boost control parameters". Read the topic on boost control parameters and it will explain how it all works and s hould be set up.
turbo R
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Post by turbo R »

ok, i read it. i want to know what to set solenoid activation pressure to. i have a 14psi spring in the wg. also, are the values in the pressure vs duty cycle table arbitrary? i don't understand how it works. do i make a pass at the wastegate pressure first?? then another one with the duty cycle raised? then input the map sensor reading with it's corresponding duty cycle % ?

sorry for all the questions but this is my first time tuning and i just want to get it right.

thanks.
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Spunkster
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Post by Spunkster »

Solenoid activation pressure sets the point where ECU starts to use the solenoid to control boost pressure. Normally this can be set a little below the minimum boost pressure in order to minimize wear on the solenoid.

The Pressure vs Duty Cycle table contains a lookup of pressure values which correspond to a solenoid duty cycle. The values for this table must be set by using a fixed duty cycle and noting the resulting manifold pressure. Note that different ambient conditions will result in slightly different boost pressures for the same duty cycle.
high_octane
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Post by high_octane »

ok i am have the same iusse to but i am using the GM controler. I have my pressue is at 4.9 an duty is at 25.0. geting 10 psi at first gear. do i need to up the the pressue and duty?
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Spunkster
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Post by Spunkster »

Have you used the fixed duty cycle to find what duty cycles produce specific boost pressures and kept track of them and entered them into the table?
oscarmayer
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Post by oscarmayer »

ok jsut double checking the aem soleniod is compatable with the S300 correct? and will handle up to 40psi? (i'm running a 7psi spring)
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OscarMayer
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