Well, I have my Defi gauges set to warn at a bit over 1.4 psi (just to let me know I've hit max boost), but I haven't seen it hit 1.4 in a very long time. I recorded a few WOT pulls and I'm noticing around 1.2-1.3 in gears 1-3 and maybe 1.4 in the higher gears.

I thought these cars make 20-21 psi stock. I even hit 1.5 once... but it seems like I can't hit peak boost anymore. Is this considered a boost leak???

 

No, it's just hotter, so your boost went down.

Plus, the only way to detect a boost leak is to do a boost leak test. You can't randomly guess based off other behaviors. Also, if you haven't even changed your boost system, then I don't know where you'd get a boost leak unless you recently messed with your IC pipes.

 

I thought I had a boost leak. I would peak at 1.2 bar and drop to .9 bar. Did a boost leak test, nothing was wrong. Just ended up being some of the unlucky few who had the lower boosted IX's. I got a hallman MBC and fixed the issue. I have it set to peak at 1.3 bar (at 3,000 RPM) and it goes back to 1.1 bar (at 7,000 RPM). Still untuned, hope to get a tune from Jestr very soon

 

Thanks guys. Now that Warrtalon brings it up I was boosting better in the winter That sucks... Oh well, time for a flash and an MBC.

 

you will still feel similar affects with a mbc.

 

But you can adjust the boost up and down with the MBC when needed.