mass air?
10-27-2005, 11:21 PM
#11
speed density cars respond well to advanced timing. mine likes 16* but you gotta run the good gas or you will get spark knock (i.e. detonation)
and speed density ecms have no way to measure the speed and density of incoming air. there are NO sensors between the air box and the throttle body. what the ecm does is use pre-programmed tables to determine what the injector pulse width should be. that is one reason why they respond so well to bolt-ons versus mass air. as you increase the incoming air volume without calibrating the ecm you are effectively leaning out the mixture. a leaner mixture means more power
and speed density ecms have no way to measure the speed and density of incoming air. there are NO sensors between the air box and the throttle body. what the ecm does is use pre-programmed tables to determine what the injector pulse width should be. that is one reason why they respond so well to bolt-ons versus mass air. as you increase the incoming air volume without calibrating the ecm you are effectively leaning out the mixture. a leaner mixture means more power
10-28-2005, 04:56 PM
#12
CMOC Rookie
Join Date: Oct 2005
Location: Aurora, Ontario
Posts: 51
thanks dan but with the speed density system can i adjust the timing manually or should i leave it alone?
both mass air and speed/density cars have distributors, so base timing can be
changed. factory timing is 10 deg BTDC. try starting with 13 to 14 deg (using at least 91 octane...94 is a good idea). timing must be set when the engine is at opperating temp...dont forget to unplug the PIP connector. if you dont hear pinging, try one more deg untill you do, then back it off 1 deg...i personally run 18 deg. (DON'T start at 18 deg!!, it may damage your motor). its easy to adjust base timing, do a search on the web, im sure you will find a "how to"...if not let me know, i'll send you an email on how to do it step by step...
both mass air and speed/density cars have distributors, so base timing can be
changed. factory timing is 10 deg BTDC. try starting with 13 to 14 deg (using at least 91 octane...94 is a good idea). timing must be set when the engine is at opperating temp...dont forget to unplug the PIP connector. if you dont hear pinging, try one more deg untill you do, then back it off 1 deg...i personally run 18 deg. (DON'T start at 18 deg!!, it may damage your motor). its easy to adjust base timing, do a search on the web, im sure you will find a "how to"...if not let me know, i'll send you an email on how to do it step by step...
10-31-2005, 09:18 AM
#13
Originally Posted by AllActionDan
thanks dan but with the speed density system can i adjust the timing manually or should i leave it alone?
both mass air and speed/density cars have distributors, so base timing can be
changed. factory timing is 10 deg BTDC. try starting with 13 to 14 deg (using at least 91 octane...94 is a good idea). timing must be set when the engine is at opperating temp...dont forget to unplug the PIP connector. if you dont hear pinging, try one more deg untill you do, then back it off 1 deg...i personally run 18 deg. (DON'T start at 18 deg!!, it may damage your motor). its easy to adjust base timing, do a search on the web, im sure you will find a "how to"...if not let me know, i'll send you an email on how to do it step by step...
both mass air and speed/density cars have distributors, so base timing can be
changed. factory timing is 10 deg BTDC. try starting with 13 to 14 deg (using at least 91 octane...94 is a good idea). timing must be set when the engine is at opperating temp...dont forget to unplug the PIP connector. if you dont hear pinging, try one more deg untill you do, then back it off 1 deg...i personally run 18 deg. (DON'T start at 18 deg!!, it may damage your motor). its easy to adjust base timing, do a search on the web, im sure you will find a "how to"...if not let me know, i'll send you an email on how to do it step by step...
All you have to do is start the car. Pop the hood. (Loosen the distributer hold down so that you are able to rotate the distributer) Then you have to unplug the the chip from wires hanging down from distributer). Then shining a timing light (a good buy if you don't have one) at the balancer and slowly rotate the distributer until you have advanced the timing to the desired degree.....which will be showing up on the balancer). Then tighten the distribuer down and plug in that chip.
Done and Simple. Have fun playing around with timing
10-31-2005, 09:26 PM
#15
CMOC Rookie
Join Date: Oct 2005
Location: Aurora, Ontario
Posts: 51
[QUOTE=Stock865.0]why would you unplug the PIP (profile ignition pickup)????? You have ABSOLUTELY no reason to do that!!!!
All you have to do is start the car. Pop the hood. (Loosen the distributer hold down so that you are able to rotate the distributer) Then you have to unplug the the chip from wires hanging down from distributer).
the the chip from wires hanging down from distributer IS the PiP conector.
All you have to do is start the car. Pop the hood. (Loosen the distributer hold down so that you are able to rotate the distributer) Then you have to unplug the the chip from wires hanging down from distributer).
the the chip from wires hanging down from distributer IS the PiP conector.
11-01-2005, 11:26 PM
#19
Originally Posted by AllActionDan
i have also seen it called that...good point.
what ever someone/anyone wants to call it, unplug the thing before setting the timing.
what ever someone/anyone wants to call it, unplug the thing before setting the timing.
not trying to be rude....just educational
