How do you measure total timing degrees?
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Joined: Jun 2000
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From: South Euclid,Ohio,U.S.A.
How do you measure total timing degrees?
I want to figure out what my total timing is set at. I am currently running stock timing at 6BTDC. Also, can i safely bump this up either 2 or 4 degrees and feel a difference?
Thankx.........
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92 Formula,305HO,Factory Oil cooler,Hyper-Tech Chip,Hyper-Tech Coil kit,Dual-Core Split-Fire wire set,Hyper-Tech Airfoil,Accel Fuel pressure guage mounted on fuel rail,Crane Adj Fuel Pressure Reg,March Performance Pulley set,Four Wheel Disc Brakes,WS6 Package,Dual Convertor Exhaust,3.42 Gear/w POSI,5Speed Borg Warner Tranny,Center-Force2 Clutch Set-Up,K&N Filter,ported Plenum.
Thankx.........
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92 Formula,305HO,Factory Oil cooler,Hyper-Tech Chip,Hyper-Tech Coil kit,Dual-Core Split-Fire wire set,Hyper-Tech Airfoil,Accel Fuel pressure guage mounted on fuel rail,Crane Adj Fuel Pressure Reg,March Performance Pulley set,Four Wheel Disc Brakes,WS6 Package,Dual Convertor Exhaust,3.42 Gear/w POSI,5Speed Borg Warner Tranny,Center-Force2 Clutch Set-Up,K&N Filter,ported Plenum.
Supreme Member
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Couple of things here...."bumping up to 2 or 4*s BTDC" is actually retarding the timing....what you would want to do to advance the timing further, is to take it to 8* or 10* BTDC.
This needs to be done with the EST line disconnected.
Is the 6*'s you're seeing "as is"...i/e you just fire it up and shoot the light at it? If so, then most likely (assuming no other issues) you're timing is retarded...with the EST line in, you should see anywhere from 12-14*'s BTDC (from a base timing of 6* BTDC).
Now to see your total timing, you need a scanner (assuming TPI motor) plugged into the ALDL...otherwise what happens is...even in park/neutral..the ECM will only give your motor as much timing as it needs...so the most you'll see with a light on it, and revvving it up, will be about 20*'s BTDC or so.
This needs to be done with the EST line disconnected.
Is the 6*'s you're seeing "as is"...i/e you just fire it up and shoot the light at it? If so, then most likely (assuming no other issues) you're timing is retarded...with the EST line in, you should see anywhere from 12-14*'s BTDC (from a base timing of 6* BTDC).
Now to see your total timing, you need a scanner (assuming TPI motor) plugged into the ALDL...otherwise what happens is...even in park/neutral..the ECM will only give your motor as much timing as it needs...so the most you'll see with a light on it, and revvving it up, will be about 20*'s BTDC or so.
Thread Starter
Junior Member
Joined: Jun 2000
Posts: 16
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From: South Euclid,Ohio,U.S.A.
Originally posted by 8Mike9:
Couple of things here...."bumping up to 2 or 4*s BTDC" is actually retarding the timing....what you would want to do to advance the timing further, is to take it to 8* or 10* BTDC.
This needs to be done with the EST line disconnected.
Is the 6*'s you're seeing "as is"...i/e you just fire it up and shoot the light at it? If so, then most likely (assuming no other issues) you're timing is retarded...with the EST line in, you should see anywhere from 12-14*'s BTDC (from a base timing of 6* BTDC).
Now to see your total timing, you need a scanner (assuming TPI motor) plugged into the ALDL...otherwise what happens is...even in park/neutral..the ECM will only give your motor as much timing as it needs...so the most you'll see with a light on it, and revvving it up, will be about 20*'s BTDC or so.
Couple of things here...."bumping up to 2 or 4*s BTDC" is actually retarding the timing....what you would want to do to advance the timing further, is to take it to 8* or 10* BTDC.
This needs to be done with the EST line disconnected.
Is the 6*'s you're seeing "as is"...i/e you just fire it up and shoot the light at it? If so, then most likely (assuming no other issues) you're timing is retarded...with the EST line in, you should see anywhere from 12-14*'s BTDC (from a base timing of 6* BTDC).
Now to see your total timing, you need a scanner (assuming TPI motor) plugged into the ALDL...otherwise what happens is...even in park/neutral..the ECM will only give your motor as much timing as it needs...so the most you'll see with a light on it, and revvving it up, will be about 20*'s BTDC or so.
The 6BTDC is with the EST disconnected. Is it safe to advance to say 8 or 10 BTDC? Thankx for responding.
------------------
92 Formula,305HO,Factory Oil cooler,Hyper-Tech Chip,Hyper-Tech Coil kit,Dual-Core Split-Fire wire set,Hyper-Tech Airfoil,Accel Fuel pressure guage mounted on fuel rail,Crane Adj Fuel Pressure Reg,March Performance Pulley set,Four Wheel Disc Brakes,WS6 Package,Dual Convertor Exhaust,3.42 Gear/w POSI,5Speed Borg Warner Tranny,Center-Force2 Clutch Set-Up,K&N Filter,ported Plenum.
Supreme Member
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Yes, I'd start with 8*'s and see if you notice any knock at WOT, then go to 10*'...best way is to monitor for knock retard though...the knock sensor (so they say) is supposed to be able to pick up knock that you cannot hear...that said, I can make my car ping like a bag of marble with no knock retard.....
TGO Supporter
Joined: Jul 1999
Posts: 10,907
Likes: 5
From: The Bone Yard
Car: Death Mobile
Engine: 666 c.i.
I agree with Mike about watching out for knocks. A little too much advance, and your knock sensor can kick in and start retarding your ignition, thus negating the advance you put in (if not further retarding it and decreasing performance).
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