is 18 or 20psi safe?? - Page 2 - Miata Turbo Forum -Boost cars, acquire cats.

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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 05-08-2007, 09:30 PM   #21
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yes gas milage is all in how hard you drive or brake etc dont waste all that precius fuel and momentum guys keep the speed up and figure out a way to handle the turns with out binders :gay: i got anywhere from 22-30 mpg at 12 psi depending on my driving habits, i esstimated aroung 240-250 whp with that setup.
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Old 05-09-2007, 07:35 AM   #22
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Why would you build a motor and only run 305s, even with an AFPR? No ECU?

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Old 05-09-2007, 08:49 AM   #23
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even with an ECU; raising the fuel pressure = larger injectors

305cc injectors @ 100psi = 420cc injectors = 220rwhp

I thought about doing it. It's done with the EMB all the time. The "ECU" has no way of knowing (unless you tell it) that there is more pressure, so if you just tune your maps like there is no FMU, then you can support lots of HP with a perfectly controlled AFR.
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