Where to set timing with 9psi powerdyne

nails79 · 01-11-2006, 10:52 PM

just finished installing the 9psi powerdyne kit, several snags along the way nothing major. i set the timing at 6* before installation as per the directions, just wondering where i should be setting it now. i know every car is different but is it safe to go to the 10-12* range? (not that i can see the timing pointer any more) motor is a 306, lunati cam, gt40 y heads ported, 42# inj, 80mm maf, 255lph pump, cobra intake, had the timing at 16* when in NA form. the car is also rich as all hell at idle, i have the fuel pressure set at 36# with vaccum off, plugs gapped at .034", also car takes about 5 minutes to idle strong and properly it wants to stall out. thanks for any help.

Jeff Chambers · 01-12-2006, 08:08 AM

You don't say what PCM you have, which would tell me what kind of total advance is being commanded. The 9psi PD kits rarely make 9psi, usually more around 5 or 6 so at that point I'd be looking to retard the timing 3 or 4 degrees under boost; total timing probably around 27 to 29-degrees. This of course depends on what your compression ratio is in the motor. The car's going to run off-kilter until you get a tune on it. I'd find a dyno tuning shop in your area a make an appointment for a custom tuning session.

nails79 · 01-12-2006, 12:38 PM

thanks for the reply, i'm running a stock A9L computer, no boost controller and 9.3-1 compression. i haven't beat on the car yet, shifted 2nd gear at 5300 and saw the boost gauge at 6psi, not sure how much more i can get out of it, kind of afraid to try with out a good tune. using msd dizzy, coil, and 6AL, definitely have enough for a good spark and more than enough fuel. so with all listed i should be able to set the base timing at 10* until car is dyno tuned??

Jeff Chambers · 01-12-2006, 02:26 PM

With the A9L and a base timing of 10-degrees, you'll have a total timing of 27-degrees by about 3000rpm. This should be safe if you are rich as described at 6 psi. Every car is different though so my real recommendation would be to pull a few extra degrees until you can get it on a dyno. Hopefully the shop you go to can actually datalog during the run using something like a SnEEC datalogger. That will let you see what kind of timing you're actually getting under load.

nails79 · 01-12-2006, 03:46 PM

Thank you for the help Jeff

01-11-2006, 10:52 PM	#1
nails79 Registered Member Join Date: Oct 2001 Location: nj Posts: 3	Where to set timing with 9psi powerdyne just finished installing the 9psi powerdyne kit, several snags along the way nothing major. i set the timing at 6* before installation as per the directions, just wondering where i should be setting it now. i know every car is different but is it safe to go to the 10-12* range? (not that i can see the timing pointer any more) motor is a 306, lunati cam, gt40 y heads ported, 42# inj, 80mm maf, 255lph pump, cobra intake, had the timing at 16* when in NA form. the car is also rich as all hell at idle, i have the fuel pressure set at 36# with vaccum off, plugs gapped at .034", also car takes about 5 minutes to idle strong and properly it wants to stall out. thanks for any help.

01-12-2006, 08:08 AM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Where to set timing with 9psi powerdyne You don't say what PCM you have, which would tell me what kind of total advance is being commanded. The 9psi PD kits rarely make 9psi, usually more around 5 or 6 so at that point I'd be looking to retard the timing 3 or 4 degrees under boost; total timing probably around 27 to 29-degrees. This of course depends on what your compression ratio is in the motor. The car's going to run off-kilter until you get a tune on it. I'd find a dyno tuning shop in your area a make an appointment for a custom tuning session. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

01-12-2006, 12:38 PM	#3
nails79 Registered Member Join Date: Oct 2001 Location: nj Posts: 3	Re: Where to set timing with 9psi powerdyne thanks for the reply, i'm running a stock A9L computer, no boost controller and 9.3-1 compression. i haven't beat on the car yet, shifted 2nd gear at 5300 and saw the boost gauge at 6psi, not sure how much more i can get out of it, kind of afraid to try with out a good tune. using msd dizzy, coil, and 6AL, definitely have enough for a good spark and more than enough fuel. so with all listed i should be able to set the base timing at 10* until car is dyno tuned?? __________________ 1985 Hatch 1987 Vert 2007 Coupe

01-12-2006, 02:26 PM	#4
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Where to set timing with 9psi powerdyne With the A9L and a base timing of 10-degrees, you'll have a total timing of 27-degrees by about 3000rpm. This should be safe if you are rich as described at 6 psi. Every car is different though so my real recommendation would be to pull a few extra degrees until you can get it on a dyno. Hopefully the shop you go to can actually datalog during the run using something like a SnEEC datalogger. That will let you see what kind of timing you're actually getting under load. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

01-12-2006, 03:46 PM	#5
nails79 Registered Member Join Date: Oct 2001 Location: nj Posts: 3	Re: Where to set timing with 9psi powerdyne Thank you for the help Jeff __________________ 1985 Hatch 1987 Vert 2007 Coupe

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