Overboosting after BPV ...?
Hi all,
I getting a dyno tune in a weeks time to have a look at this issue, but thought I might post it to see if anyone else had the same experience. Ever since (I think) I replaced my BPV from stock to FORGE V1 (did not retune), my boost levels have increased about 2psi. Thought I would check this in, so they put it on the dyno and it didn't make it through a run and claimed to be "overboosting" with a CEL on the accessport (only has done this on the dyno though, I cannot replicate it on the street). Requested to book it back in and retune to correct issue as we ran out of daylight.
Any one else had this issue before? Could my old BPV have been leaky and the forge one corrected it and has taken it past the boost maps set by the old tune? My tune before BPV was max at 20 and now it goes to about 22.5 at WOT in 4th. I am just driving it under 21psi in the mean time to be safe. Spring etc is perfect as it vents nicely.
Also...Tuned in summer temps and now averaging about 10 degrees...VIC for the win lol
Thoughts? Thanks.
Edit: Now to think of it, I also added the custom CBE exhaust to it. However, I got them to totally remove any factory piping and ran a 3" mandrel bend SS from 3" COBB dump (with new 3" flange) straight to magnaflow muffler. So from 2 1/4 up to 3" change ...could this affect it also?
Last edited by nas711; 19-05-2015 at 08:19 PM.
2010 Gen 2 - "SPOOOL" (VIC) - Fully bolted
CORKSPORT TURBO | COBB AP3 | COBB DOWNPIPE | COBB REM | AUTOTECH HPFP | CORK SPORT 3" PS MAF INTAKE | COBB SF AB | CPE TMIC | CPE HEADERS | COBB 3 PORT EBCS | 3 BAR MAP| PEDDERS COILOVERS | DBA T4 SLOTTED ROTORS | CORKSPORT EYELIDS| FORGE V1 BPV| | MAGNAFLOW CUSTOM | VELOCITY RED | PEARL 2PAC STOCK RIMS | DUAL TUNED BY HPF ON E30