Im running TWM ITBs, AEM EMS with RC 440cc injectors on my H22, my idle is stable at 1300rpm and A/F is rich at 11.2 to 11.3. I cannot go any leaner otherwise the car will not idle properly. Will this foul my spark plugs?
WOT and cruising is fine, I can lean it out no problem. Im only running rich at idle, is this normal for ITBs/large injectors?

 

you should be able to ge tthe idel down a bity more ..i can get mine round 750 to 800 but it will depende on the vaccume thats available..you need to see what vac your running at 1300 rpm and make sure your adjusting the right spot...

anyhitng 14 to 16 should be fine ..just depends on how stuffs gonna work for your motor

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VSBB6 &raquo;</TD></TR><TR><TD CLASS="quote">Im running TWM ITBs, AEM EMS with RC 440cc injectors on my H22, my idle is stable at 1300rpm and A/F is rich at 11.2 to 11.3. I cannot go any leaner otherwise the car will not idle properly. Will this foul my spark plugs?
WOT and cruising is fine, I can lean it out no problem. Im only running rich at idle, is this normal for ITBs/large injectors?</TD></TR></TABLE>

two things to check:
- itb plate adjustments are prolly off (check temps on each header primariy at idle)
- your wideband is not calibrated.

greg

 

Im running golden eagle vacuum, idle at 1200 isn’t a concern for me because I also have place racing engine mounts, the vibration is eliminated with higher idle.
Only concern is a/f ratio is 11.2 at idle, will this be too rich/cold for my spark plugs? Im running NGK heat range 6, I took them out yesterday and they look brownish and white.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by machine4321 &raquo;</TD></TR><TR><TD CLASS="quote">you should be able to ge tthe idel down a bity more ..i can get mine round 750 to 800 but it will depende on the vaccume thats available..you need to see what vac your running at 1300 rpm and make sure your adjusting the right spot...

anyhitng 14 to 16 should be fine ..just depends on how stuffs gonna work for your motor
</TD></TR></TABLE>

 

My wideband has been calibrated, the ITBs plates are synchronized and adjusted to open very slightly at idle to help idling. That’s the reason I need additional fuel at idle.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHEETAH &raquo;</TD></TR><TR><TD CLASS="quote">

two things to check:
- itb plate adjustments are prolly off (check temps on each header primariy at idle)
- your wideband is not calibrated.

greg</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VSBB6 &raquo;</TD></TR><TR><TD CLASS="quote">My wideband has been calibrated, the ITBs plates are synchronized and adjusted to open very slightly at idle to help idling. That’s the reason I need additional fuel at idle.

</TD></TR></TABLE>

where is your o2 bung located ? how sure are you that all 4 primaries are equally hot and there is 11:1 a/f on each cyl ? use the carb tool to adjust each thr butterfly.

greg

 

My O2 bung is located in the test pipe.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHEETAH &raquo;</TD></TR><TR><TD CLASS="quote">

where is your o2 bung located ? how sure are you that all 4 primaries are equally hot and there is 11:1 a/f on each cyl ? use the carb tool to adjust each thr butterfly.

greg</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VSBB6 &raquo;</TD></TR><TR><TD CLASS="quote">My O2 bung is located in the test pipe.


</TD></TR></TABLE>

so then you don;t know that all your butterflies are properly calibrated. you should try to get an laser temp gun and read the temps of each exh primairy to compare how hot they are at idle.

greg