[dhock_holiday]

Originally Posted by Unruly1

When my car was completely stock it was making 14lbs of boost based on the factory boost gauge after I added a catless downpipe my car was making 17lbs not sure what that equates to for hp but it was definitely pulling harder

Does it throw a CEL?

[cyam]

Originally Posted by Unruly1

When my car was completely stock it was making 14lbs of boost based on the factory boost gauge after I added a catless downpipe my car was making 17lbs not sure what that equates to for hp but it was definitely pulling harder

No, what was actually happening is you were getting overboost. As the dp allows the turbo to spool quicker, you momentarily got a few extra PSI for a few seconds then it would have settled back to the normal Max boost.

I have tested this a number of times, going from tuned to stock to tuned with a dp. It's quite obvious if you have a proper boost gauge. Factory boost gauge shows the temporary max it hit and holds that value. But if you have a proper gauge ypu can see it hit 3psi more than normal but only for a sec or two. When the car is tuned for a dp ypu will not get the overboost, just the higher boost for the whole time its demanded.

[mike@x-ph.com]

Originally Posted by dhock_holiday

Does it throw a CEL?

All catless downpipes throw a CEL