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Why is the base fuel pressure higher on the later model cars?

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Why is the base fuel pressure higher on the later model cars?

Old 06-25-2013, 01:51 AM
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Default Why is the base fuel pressure higher on the later model cars?

Hi,

My early NB has a 3 bar referenced fuel pressure regulator, and my MSM/SE had a 4 bar static regulator.

Do you know why Mazda made this change, is it for better atomization at idle?

Do you think it is worth the effort of fitting an aftermarket regulator and setting it to 4 bar without any manifold reference?

Cheers
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Old 06-25-2013, 02:06 PM
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Fuel is heated much less on returnless systems.
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Originally Posted by ninerwfo View Post
The “into to megasquirt thread” mentions that the MS3 basic has 5 inputs with built in pull up resistors - and I was just wondering why it would have so many, while the MS3Pro PnP has just 2 (with no pull ups?)
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