Stock MPS boost?

[Doug_MPS6]

I understand it to be 13.6 psi max stock. I feel that 21-22 max quoted above is excessive without strengthened internals and any more than 18 psi generates more heat than usefulness.

[99GTT]

Running 18 all day every day with chiptorque ezy flash.... Loving every minute of it!!!


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[kevstewart]

My car struggles to hold the boost at the moment... Peaks at 16/17 then drops down to about 12 by 6k revs.... I should be looking to hold at least 14/15 psi surely?

Also the lower gears 1/2/3 don't seem to boost or hold as good...

[2XS]

My car struggles to hold the boost at the moment... Peaks at 16/17 then drops down to about 12 by 6k revs.... I should be looking to hold at least 14/15 psi surely?

Also the lower gears 1/2/3 don't seem to boost or hold as good...

Boost is limited (std Mazda tune) to a percentage in the lower gears 1-4. Eg 1st - 80%, 2nd - 85%, 3rd - 90% and 4th 95%. Yes 4th is actually limited too.

Most aftermarket tunes remove these limiters.

[kevstewart]

Thanks for the information... Would my hypertech remove these?
Got my car on rolling road last weekend and they used 3rd gear, seemed a bit odd to me... Anyone heard of that?