I've seen a spike of over 19 PSI on a completely stock MS3; got a log file to prove it if needed. I forget the exact gear, but it was either 4th or 5th. I swear I've seen a spike of over 20 PSI on a stock car, and thought I had a log of it somewhere but can't find it now. I have other logs showing 17.98, 18.70, and 18.42 spikes.
All that said, a spike to 18 is normal; at least in the higher gears.
[quote author=Ryz link=topic=137359.msg2977306#msg2977306 date=1236265169]
What exactly do you base this statement on. When I was stock with nothing but my gauge I was hitting spikes over 20.
+2834298340923 and now i see even more than that with mods. i dont see 18 as that big of a deal, i mean now i spike to almost 25 so i guess that just seems low to me but even stock yours seems to be ok.
^^ you probably would if you run WOT from a lower RPM in a higher gear, not that I recommend it. I have logged my car extensively over the last couple weeks just to determine what conditions routinely trigger massive boost spikes and I generally try to avoid doing whatever it is that causes it
A forum community dedicated to Mazda 3 and all Mazda vehicle owners and enthusiasts. Come join the discussion about MazdaSpeed performance, modifications, classifieds, troubleshooting, maintenance, and more!