Strange idle exhaust noises...

[Mobius]

So here is the deal,

I have a HKS cast exhst mani bolted up to a Turbonetics 62-1 that mates to a custom 3'' RB down pipe with a V-band flange.

When I start the car up when it is cold I here a very annoying audible "pinging" that obviously is the extreme pulses of the exhaust gases that is heard through the exhaust manifold. It is not sparatic and is linear with the rpms. I have ZERO exhaust leaks from my mani, turbo and DP(this was my first assumption but verifed last night both by feel and visual since it was 29 *F outside and you could see any warm air if it was leaking).

It goes away when the car is driven and warmed up. I know I sound like a pussy complaining about this but it just sounds like shit when started cold(kinda embarrassing when people want to hear it fire up lol). I wonder how I can fix this and if anyones FC does the same thing.


My timing at the pulley is set at factory 5* ATDC while my Power FC map is set at 12* at idle. Split is at 0.
Idle AFR is 12.0:1.
RPM is 900 rpm
Exhaust ports are ported as well via Titanium TT


Man it is annoying. Thanks for looking

[FC3S Murray]

So here is the deal,

I have a HKS cast exhst mani bolted up to a Turbonetics 62-1 that mates to a custom 3'' RB down pipe with a V-band flange.

When I start the car up when it is cold I here a very annoying audible "pinging" that obviously is the extreme pulses of the exhaust gases that is heard through the exhaust manifold. It is not sparatic and is linear with the rpms. I have ZERO exhaust leaks from my mani, turbo and DP(this was my first assumption but verifed last night both by feel and visual since it was 29 *F outside and you could see any warm air if it was leaking).

It goes away when the car is driven and warmed up. I know I sound like a pussy complaining about this but it just sounds like shit when started cold(kinda embarrassing when people want to hear it fire up lol). I wonder how I can fix this and if anyones FC does the same thing.


My timing at the pulley is set at factory 5* ATDC while my Power FC map is set at 12* at idle. Split is at 0.
Idle AFR is 12.0:1.
RPM is 900 rpm
Exhaust ports are ported as well via Titanium TT


Man it is annoying. Thanks for looking