BoostedTT91
15+ Year Contributor
- 285
- 7
- Aug 2, 2004
-
Elysburg,
Pennsylvania
I'm working on dialing in my idle settings and wanted to get someone with more experience opinion on a few things. This is on a 1g dsm with pte 780cc injectors, base fuel pressure of 43psi, rewired walboro 255 and hks 272/264 cams, evo 8 mas, 6 bolt motor and SMIM. After setting up the base setup settings, my airflow per rev is quite high at .43 gm/per rev. The only way i could get it down was to drop my maf comp settings down to -20.3% for 0 and -14.3% for 50hz to get my airflow per revs down to around .30-.32 gm/per rev. I also had to reduce my injector deadtime down quite a bit from the suggested 555 to 390 to get my fuel trims closer to zero. Before the o2 wouldn't cycle and combined fuel trim was -21% around.
Is this normal to have to drop these settings down a good amount to get where i need to be or is there something else i need to be looking at. I have done a boost leak test, set the timing and all that stuff to assure everything is correct before dialing everything in.
attached is my log after the adjusted settings listed above. Thanks in advance for any advice
1). Any boost, vac, or exhaust leaks? Boost leak tested 5psi above your max boost with no leaks?
no leaks
2). Verified mechanical timing?
yes
3). Verified base timing?
yes
4). Ignition system COP or Stock Coil: stock
Wire brand and Age: ngk
Spark Plug brand, type and Gap:
6). Performed basic throttle body adjustments? Idle Switch:yes
Throttle Cable:yes
TPS:yes
BISS:yes
8). Any known bad sensors or brittle wiring?
no
9). Any DTC/CEL codes?
no
10). Electrical system Car off (not running):
Car running:
11). Base fuel pressure and injector values Base Fuel Pressure:43psi
Injector Size (cc/min)
te 780cc
13). Type of fuel Type: gas 93oct
Percent of Ethanol:
14). Watched ECMlink how-to videos? yes
Is this normal to have to drop these settings down a good amount to get where i need to be or is there something else i need to be looking at. I have done a boost leak test, set the timing and all that stuff to assure everything is correct before dialing everything in.
attached is my log after the adjusted settings listed above. Thanks in advance for any advice
1). Any boost, vac, or exhaust leaks? Boost leak tested 5psi above your max boost with no leaks?
no leaks
2). Verified mechanical timing?
yes
3). Verified base timing?
yes
4). Ignition system COP or Stock Coil: stock
Wire brand and Age: ngk
Spark Plug brand, type and Gap:
6). Performed basic throttle body adjustments? Idle Switch:yes
Throttle Cable:yes
TPS:yes
BISS:yes
8). Any known bad sensors or brittle wiring?
no
9). Any DTC/CEL codes?
no
10). Electrical system Car off (not running):
Car running:
11). Base fuel pressure and injector values Base Fuel Pressure:43psi
Injector Size (cc/min)
te 780cc13). Type of fuel Type: gas 93oct
Percent of Ethanol:
14). Watched ECMlink how-to videos? yes
