Dr. Jekyll

i searched the archives and found a bunch of different possible reasons for this. The car ran fine with the MTM chip, usually spiked to 17psi with the occasional 19 or 20 psi spike. But the GIAC spikes to about 20 psi, drops to 15 then back up to 20 then back down to 15... and so on. These were highway pulls in 5th and 6th from about 65 - 70 but I noticed it on the on ramp in 4th too. I'm VAGing it tomorrow but I have a feeling its probably throttle cut. I'm going to put an MBC in parallel tomorrow as well and set it to 17psi... should this fix my problem? I've also read that turning the N75 about an 1/8 of a turn clockwise may help too, or even a TCD. Any other suggestions or ideas of what this might be? TIA

sj6sp

I've tried adjusting the N75 but didn't solve the problem with X. MBC works for me.

No need for TCD if you are running K03s IMO. Just keep the boost under control.

dscottjr

when having boost issues.

AJN334

Do you notice a apparent power difference?

3Scanner

What ECU box are you running? M-box?

PILL PUSHER

What MBC are you going with?

Hibiscus Red S4

Should have stuck with MTM

NYC_S

what would be the advantage then from switching from MTM to giac if your limiting boost to 17?

dscottjr

timing.

PSmalls::DoggieStyle

2nd.