<TABLE cellSpacing=1 cellPadding=6 width="100%" border=0><TBODY><TR><TD colSpan=2><TABLE width="100%" border=0><TBODY><TR><TD style="PADDING-TOP: 4px" vAlign=top colSpan=2>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Timing adjustment<!-- google_ad_section_end -->
[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial]March 30 2001 at 5:29 AM[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<SCRIPT language=Javascript> <!-- var n54_em; n54_em = ""; n54_em = n54_em + "m";n54_em = n54_em + "e";n54_em = n54_em + "u";n54_em = n54_em + "k";n54_em = n54_em + "@";n54_em = n54_em + "f";n54_em = n54_em + "c";n54_em = n54_em + "h";n54_em = n54_em + "a";n54_em = n54_em + "n";n54_em = n54_em + "g";n54_em = n54_em + ".";n54_em = n54_em + "n";n54_em = n54_em + "l"; document.write("Felix"); // --> </SCRIPT>Felix <NOSCRIPT></NOSCRIPT> [/FONT]</TD></TR><TR><TD vAlign=bottom colSpan=3><HR></TD></TR><TR><TD colSpan=3>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->On my carbureted X, I used to set the timing (static) on the distributor close to 10 degrees. This increased mpg as well as throttle response.
Now I have a fuel injected (US '87 50 state spec according to the plate) X. Would it make sense to do this as well or does the Jetronic system catch this?
second, does it make sense to fiddle with the air flow meter (spring etc) in order to get more power cheaply?
Any thoughts welcome,
Felix - who is intensely studying any FI info he can find
<!-- google_ad_section_end -->
[/FONT]</TD></TR></TBODY></TABLE><TABLE cellPadding=4 width="100%" border=0><TBODY><TR><TD vAlign=top noWrap align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial] [/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]
[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Author[/FONT]</TD><TD>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]Reply[/FONT]</TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<SCRIPT language=Javascript> <!-- var n54_em; n54_em = ""; n54_em = n54_em + "s";n54_em = n54_em + "e";n54_em = n54_em + "r";n54_em = n54_em + "v";n54_em = n54_em + "i";n54_em = n54_em + "c";n54_em = n54_em + "e";n54_em = n54_em + "@";n54_em = n54_em + "i";n54_em = n54_em + "m";n54_em = n54_em + "p";n54_em = n54_em + "o";n54_em = n54_em + "r";n54_em = n54_em + "t";n54_em = n54_em + "a";n54_em = n54_em + "u";n54_em = n54_em + "t";n54_em = n54_em + "o";n54_em = n54_em + "t";n54_em = n54_em + "e";n54_em = n54_em + "c";n54_em = n54_em + "h";n54_em = n54_em + ".";n54_em = n54_em + "c";n54_em = n54_em + "o";n54_em = n54_em + "m"; document.write("steve ambrose"); // --> </SCRIPT>steve ambrose <NOSCRIPT></NOSCRIPT>[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 15px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Timing...<!-- google_ad_section_end -->
[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]March 30 2001, 7:17 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 15px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Hi there... the stock timing setting on an '81 injected X is 10btdc, I have found on every injected X that I've worked on that there is a noticeable gain in low end power by advancing the initial timing a few degrees. 4 degrees will make an improvement you can feel. Just be sure to listen for "ping" under heavy throttle, and also around 3500rpm and moderate throttle (vacuum advance). As far as the spring in the airflow meter, be careful... make sure you can get it back to stock, and don't move the "gear" more than a few teeth... under normal driving, you won't notice a big difference. The OX sensor controls the mixture unless the car is cold or until the throttle switch signals full throttle (this actually happens about 2/3 throttle). It's possible to get a good idea of the fuel mixture by hooking a digital voltmeter to the lead from the OX sensor and running the car. Under closed loop conditions, it with rapidly cycle between .3V and .7V With the car warmed up and over 2/3 throttle, the car goes into open loop and the mixture is controlled by the wiper in the airflow meter and the the temp sensors. At this point, you want to see approx .85V and it will vary somewhat, but not cycle. If it's much over this, the car is too rich, and if it's much under, then you are too lean.
Good luck,
Steve<!-- google_ad_section_end -->
[/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=4 width="100%" border=0><TBODY><TR><TD vAlign=top align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial] [/FONT]</TD><TD vAlign=top noWrap align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]
[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<SCRIPT language=Javascript> <!-- var n54_em; n54_em = ""; n54_em = n54_em + "m";n54_em = n54_em + "e";n54_em = n54_em + "u";n54_em = n54_em + "k";n54_em = n54_em + "@";n54_em = n54_em + "f";n54_em = n54_em + "c";n54_em = n54_em + "h";n54_em = n54_em + "a";n54_em = n54_em + "n";n54_em = n54_em + "g";n54_em = n54_em + ".";n54_em = n54_em + "n";n54_em = n54_em + "l"; document.write("Felix"); // --> </SCRIPT>Felix <NOSCRIPT></NOSCRIPT>[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 30px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Pinging ... and tank content<!-- google_ad_section_end -->
[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]March 31 2001, 1:33 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 30px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Pinging is not something I fear most.. fuel here is 95 octane whilst 98 is available too though expensive ($1,25 per litre). The car was designed to run on 91, wasn't it?
Is the injected fuel tank smaller? My carbed X has 50 litres, this one only about 40?
Thanks anyway
Felix<!-- google_ad_section_end -->
[/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=4 width="100%" border=0><TBODY><TR><TD vAlign=top align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial] [/FONT]</TD><TD vAlign=top noWrap align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]
[/FONT]</TD></TR></TBODY></TABLE></TD></TR><TR><TD vAlign=top noWrap width="17.9%">[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<SCRIPT language=Javascript> <!-- var n54_em; n54_em = ""; n54_em = n54_em + "s";n54_em = n54_em + "e";n54_em = n54_em + "r";n54_em = n54_em + "v";n54_em = n54_em + "i";n54_em = n54_em + "c";n54_em = n54_em + "e";n54_em = n54_em + "@";n54_em = n54_em + "i";n54_em = n54_em + "m";n54_em = n54_em + "p";n54_em = n54_em + "o";n54_em = n54_em + "r";n54_em = n54_em + "t";n54_em = n54_em + "a";n54_em = n54_em + "u";n54_em = n54_em + "t";n54_em = n54_em + "o";n54_em = n54_em + "t";n54_em = n54_em + "e";n54_em = n54_em + "c";n54_em = n54_em + "h";n54_em = n54_em + ".";n54_em = n54_em + "c";n54_em = n54_em + "o";n54_em = n54_em + "m"; document.write("steve ambrose"); // --> </SCRIPT>steve ambrose <NOSCRIPT></NOSCRIPT>[/FONT]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 45px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Tank capacity...<!-- google_ad_section_end -->
[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]April 3 2001, 5:54 PM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 45px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Hi there... I forgot to look them up, but I thought they were both the same at 12.0 us gallons. I just put 11.8 gallons in my '81 FI X yesterday(I tend to procrastinate!)
Steve<!-- google_ad_section_end -->
[/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=4 width="100%" border=0><TBODY><TR><TD vAlign=top align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial] [/FONT]</TD><TD vAlign=top noWrap align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]
[/FONT]</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial]March 30 2001 at 5:29 AM[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<SCRIPT language=Javascript> <!-- var n54_em; n54_em = ""; n54_em = n54_em + "m";n54_em = n54_em + "e";n54_em = n54_em + "u";n54_em = n54_em + "k";n54_em = n54_em + "@";n54_em = n54_em + "f";n54_em = n54_em + "c";n54_em = n54_em + "h";n54_em = n54_em + "a";n54_em = n54_em + "n";n54_em = n54_em + "g";n54_em = n54_em + ".";n54_em = n54_em + "n";n54_em = n54_em + "l"; document.write("Felix"); // --> </SCRIPT>Felix <NOSCRIPT></NOSCRIPT> [/FONT]</TD></TR><TR><TD vAlign=bottom colSpan=3><HR></TD></TR><TR><TD colSpan=3>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->On my carbureted X, I used to set the timing (static) on the distributor close to 10 degrees. This increased mpg as well as throttle response.
Now I have a fuel injected (US '87 50 state spec according to the plate) X. Would it make sense to do this as well or does the Jetronic system catch this?
second, does it make sense to fiddle with the air flow meter (spring etc) in order to get more power cheaply?
Any thoughts welcome,
Felix - who is intensely studying any FI info he can find
<!-- google_ad_section_end -->
[/FONT]</TD></TR></TBODY></TABLE><TABLE cellPadding=4 width="100%" border=0><TBODY><TR><TD vAlign=top noWrap align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial] [/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 15px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Timing...<!-- google_ad_section_end -->
[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]March 30 2001, 7:17 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 15px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Hi there... the stock timing setting on an '81 injected X is 10btdc, I have found on every injected X that I've worked on that there is a noticeable gain in low end power by advancing the initial timing a few degrees. 4 degrees will make an improvement you can feel. Just be sure to listen for "ping" under heavy throttle, and also around 3500rpm and moderate throttle (vacuum advance). As far as the spring in the airflow meter, be careful... make sure you can get it back to stock, and don't move the "gear" more than a few teeth... under normal driving, you won't notice a big difference. The OX sensor controls the mixture unless the car is cold or until the throttle switch signals full throttle (this actually happens about 2/3 throttle). It's possible to get a good idea of the fuel mixture by hooking a digital voltmeter to the lead from the OX sensor and running the car. Under closed loop conditions, it with rapidly cycle between .3V and .7V With the car warmed up and over 2/3 throttle, the car goes into open loop and the mixture is controlled by the wiper in the airflow meter and the the temp sensors. At this point, you want to see approx .85V and it will vary somewhat, but not cycle. If it's much over this, the car is too rich, and if it's much under, then you are too lean.
Good luck,
Steve<!-- google_ad_section_end -->
[/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=4 width="100%" border=0><TBODY><TR><TD vAlign=top align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial] [/FONT]</TD><TD vAlign=top noWrap align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 30px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Pinging ... and tank content<!-- google_ad_section_end -->
[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]March 31 2001, 1:33 AM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 30px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Pinging is not something I fear most.. fuel here is 95 octane whilst 98 is available too though expensive ($1,25 per litre). The car was designed to run on 91, wasn't it?
Is the injected fuel tank smaller? My carbed X has 50 litres, this one only about 40?
Thanks anyway
Felix<!-- google_ad_section_end -->
[/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=4 width="100%" border=0><TBODY><TR><TD vAlign=top align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial] [/FONT]</TD><TD vAlign=top noWrap align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]
[FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD style="PADDING-LEFT: 45px" vAlign=top><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Tank capacity...<!-- google_ad_section_end -->
[/FONT][FONT=Trebuchet MS, Verdana, Tahoma, Arial][/FONT]</TD><TD vAlign=top align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]April 3 2001, 5:54 PM [/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=1 width="100%" border=0><TBODY><TR><TD style="PADDING-LEFT: 45px">
[FONT=Trebuchet MS, Verdana, Tahoma, Arial]<!-- google_ad_section_start -->Hi there... I forgot to look them up, but I thought they were both the same at 12.0 us gallons. I just put 11.8 gallons in my '81 FI X yesterday(I tend to procrastinate!)
Steve<!-- google_ad_section_end -->
[/FONT]</TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=4 width="100%" border=0><TBODY><TR><TD vAlign=top align=left>[FONT=Trebuchet MS, Verdana, Tahoma, Arial] [/FONT]</TD><TD vAlign=top noWrap align=right>[FONT=Trebuchet MS, Verdana, Tahoma, Arial]