Im running a DSM 14b on a DOHC ZC. Setup as follows

14b
HF Mani / Adapter plate
Custom 2.75 downpipe and exhaust
CCA FMIC

The 14b had alot of cracks around the wastegate, so that could be the issue. There are no exhaust leaks. Changine the wastegate to a 7psi wastegate either made it spool sooner, or it just felt like that because it was running out of breath upper RPM. The lag is bad, it doesnt spool until 5,000 RPM. It also isnt a smooth spool to full boost, you wait...nothing...then slam...it spools.

I have the wastegate vacuum sourced off the TB if that could have anything to do with it.

Any ideas?

 

I talked to a few people who think its the cracks in the turbo. I was wondering if I could take it out and have the cracks welded?

 

Your wastegate is probably opening up really early causing the "lag"...Use of a boost controller will help "hide" the boost pressure from the diaphragm and allow for the turbo to spool up much faster...

 

Ok, Ill try that.

Im also going to try duct taping the BOV to see if its leaking.