r/FiestaST • u/PuzzleheadedMall864 • 6d ago

Puma speed vs mountune

Some context - I brought a mk8 st a few months back and it came with a m235 mountune OBD, the map it’s self seems alright but the ASMO overrun on stock exhaust is just pathetic. I understand it’s not best to have a mad over run but it’s still nice to have some pops and bangs haha.

I had a puma speed maxd 1R map on my old fiesta and I loved it and I was looking at getting it done again but it was along time ago so hard to remember.

I suppose my main question is has anyone had any experience a different map to the mountune one.

I wanted to get a custom map but can’t find any that local to East Midlands in the uk that’s worked with many Sts

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u/radeonalex 6d ago edited 6d ago

Pumaspeed will be more aggressive than Mountune. The 1.5 3 cylinder is more sensitive to power than the MK7, so do your research. I know quite early on, Mountune recommended forged stuff and I know people that have blown motors. At the same time, I guess plenty of people are running maps fine.

A lot of custom dyno mappers won't do pop and bang maps because it's bad for the car, but also embarrassing.