kicker22705
Member
- :
- 03.5 Ti MSP
I have this pinging problem i can't seem to figure out. I've had many professional tuner looks at it, tune it, and try various things but could not pin point what is causing it.
I thought i'd make this journal so people could look at my setup, settings, and data and bounce around ideas and hopefully help me figure this out once and for all.
The Problem:
Detonation:
During my past two dynotunes (Feb and June 2007), pinging was detected on a HKS Knock Amp from the range from 3500rpm to 5000rpm beginning from 8psi. Audible pinging can be heard at 11psi.
Things I have checked/tried:
Spark Plugs: ZFR7F and BKR7E both ping
Pulled Timing: See the timing maps below
Lowered Static: Pulled it down to 5, pinged, so brought it back up to 10
Added Fuel: See AFR above in the dynocharts
Over-milled Head: Checked w/ the supervisor at the dealership overseeing my short-block install, and he told me the head wasn't warped so it wasn't milled. Only had some valves replaced.
110 octane: Mixed 110 w/ 93 and the pinging ceased. Only thing that worked so far, and it's far from a cure.
My Setup:
Engine Setup:
MAM Built Short Block
- Custom CP 8.5:1 Forged Pistons
- MAM H-Beam Long Rods
- Toga Bearings
- ARP Head/Main Studs
- OEM Gaskets
- Installed by local Mazda Dealership
- NGK BKR7E Spark Plugs
Fuel:
STi 565cc Injectors
Walbro 255lph Fuel Pump
Turbo Related:
Garrett GT28RS
Garrett FMIC 26x6.5x3.5
CorkSport DP
Thunder Manifold
Vibrant Exhaust
EMS:
Microtech LT8s
My Tune:
I dynotuned at Altered Atmosphere Motorsports on a dynojet.
My Timing Maps:
Timing Settings:
- TimingMax: +34 degrees
- OptStatic: +10 degree
Dyno Charts w/ AFR:
AAM February Dynotune (15psi):
AAM June Dynotune (11psi):
Don's November Dynoday (11psi):
Datalog and other information:
8psi
11psi
EGT: Less than 800 Celcius
Compression Check: 180-185
- note: my compression originally used to show 200-210. It now shows 180-185, but i think its b/c i dropped my compression tester and it may be off now. It showed 180-185 ever since i dropped it.
If you have any ideas/suggestions please post. thank you
I thought i'd make this journal so people could look at my setup, settings, and data and bounce around ideas and hopefully help me figure this out once and for all.
The Problem:
Detonation:
During my past two dynotunes (Feb and June 2007), pinging was detected on a HKS Knock Amp from the range from 3500rpm to 5000rpm beginning from 8psi. Audible pinging can be heard at 11psi.
Things I have checked/tried:
Spark Plugs: ZFR7F and BKR7E both ping
Pulled Timing: See the timing maps below
Lowered Static: Pulled it down to 5, pinged, so brought it back up to 10
Added Fuel: See AFR above in the dynocharts
Over-milled Head: Checked w/ the supervisor at the dealership overseeing my short-block install, and he told me the head wasn't warped so it wasn't milled. Only had some valves replaced.
110 octane: Mixed 110 w/ 93 and the pinging ceased. Only thing that worked so far, and it's far from a cure.
My Setup:
Engine Setup:
MAM Built Short Block
- Custom CP 8.5:1 Forged Pistons
- MAM H-Beam Long Rods
- Toga Bearings
- ARP Head/Main Studs
- OEM Gaskets
- Installed by local Mazda Dealership
- NGK BKR7E Spark Plugs
Fuel:
STi 565cc Injectors
Walbro 255lph Fuel Pump
Turbo Related:
Garrett GT28RS
Garrett FMIC 26x6.5x3.5
CorkSport DP
Thunder Manifold
Vibrant Exhaust
EMS:
Microtech LT8s
My Tune:
I dynotuned at Altered Atmosphere Motorsports on a dynojet.
My Timing Maps:
Timing Settings:
- TimingMax: +34 degrees
- OptStatic: +10 degree
Dyno Charts w/ AFR:
AAM February Dynotune (15psi):
AAM June Dynotune (11psi):
Don's November Dynoday (11psi):
Datalog and other information:
8psi
11psi
EGT: Less than 800 Celcius
Compression Check: 180-185
- note: my compression originally used to show 200-210. It now shows 180-185, but i think its b/c i dropped my compression tester and it may be off now. It showed 180-185 ever since i dropped it.
If you have any ideas/suggestions please post. thank you
Last edited: