Hello,
I have a Toyota Supra RZ 1994 J-spec with the following specs :
1st decat 2,5 with RR
2nd decat 3 HKS
Two stock bafflers (restrictive?)
Blitz nur spec
After fitting the downpipe, boost didn't raise at all? Is it true that the two bafflers before the blitz are also very restrictive? I have a thorsen FCD, but not connected yet
It should raise the boost now, or am I wrong? And yes I've read the FAQ about BPU
This is the only thing that came across my mind
1) Aftermarket cat-back exhaust
The stock cat back (the pipe after the 2nd decat pipe) is extremely restrictive. In order to allow a good free flowing system this needs to be replaced with an aftermarket system. There are a huge amount of systems available, but any good quality aftermarket system will be suitable for a BPU level of modification.
Thanks