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My car spikes 18 psi and then drops back to 16 in 3rd gear.
 

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+1. Normal with an intake only.
 

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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.
 

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[quote author=acidbbg link=topic=137359.msg2970558#msg2970558 date=1236011026]
Any mods?

If not..that it's not normal.
[/quote]

What exactly do you base this statement on. When I was stock with nothing but my gauge I was hitting spikes over 20.
 

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[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.
[/quote]

+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.
 

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Yea I hit 19 sometimes, usually in the higher gears. MS CAI and Corksport race pipe.
 

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^^ 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
 
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