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Discussion Starter · #1 ·
Hey guys,

We just installed a cone filter on my friend's EVO. The problem is,
now that it is on, the car fuel cuts at 20psi. Before the intake,
when he just had a boost controller, boost gauge, and turbo timer,
he was able to run 22psi, with no fuel cut. Does anyone have any
idea why it is now fuel cutting at 20psi?
 

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well, since fuel cut is associated with AirFlow...I'm sure he's probably flowing more air now with the freer flowing filter that is causing that.
 

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GoSpeedRacerGo said:
Hey guys,

We just installed a cone filter on my friend's EVO. The problem is,
now that it is on, the car fuel cuts at 20psi. Before the intake,
when he just had a boost controller, boost gauge, and turbo timer,
he was able to run 22psi, with no fuel cut. Does anyone have any
idea why it is now fuel cutting at 20psi?

The air flow sensor on the car is now at a higher frequency. This causes the fuel cut.

There are several ways around this. The correct one is to replace the ECU with a programmable ECU.
 

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Discussion Starter · #4 ·
So assuming he gets an AFC...How much boost will he be able to run on stock injectors/fuel pump. It's been so long since I've had to guess without logging :)
 

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depends on the octane of the gas. Personally I ran 21psi daily with my Big16g on 91 octane...some people think this is dangerous, but I tuned my car with DSMLink and I was not knocking...if there was any knock it was always less than 2 counts...so it was damn solid

I would recommend though that without a tuning device...don't go above 20psi on stock fuel system...just be safe until you can log and know whats going on...common sense.
 

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its one psi above stock at 3500rpms and 4psi above at 6500-7000...

so no...not stock boost
 
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