Blowing spark out past 24psi?
#1
Blowing spark out past 24psi?
My current setup:
Gtx4294r 1.0 t4 exhaust housing
4" exhaust
Large streetport motor
E85 fuel (4xID2000, 2xBosch 044 pumps, parallel -6 lines)
AEM EMS v1
Direct fire IGN-1A coils with MSD 10mm wires (Ludwig harness)
R6725-11 plugs x4 (tried new set of 10.5's as well)
My tune is spot on at 22 psi and the car runs great down low and up top. If I start to turn the boost up past 22 (25+ usually), sometimes it will run perfect (11.5afr), but most of the time it bogs and goes super rich (9.7afr). It feels like it's missing or blowing the spark out. I've tried different plugs and wires. I'm running 4.5ms of dwell on the coils with 5.2ms dwell above 4500 rpm.
I wanted to see if anyone else has had this issue or had any suggestions for it. Should I try different plugs or do you think it's something else?
Thanks,
Copeland
Gtx4294r 1.0 t4 exhaust housing
4" exhaust
Large streetport motor
E85 fuel (4xID2000, 2xBosch 044 pumps, parallel -6 lines)
AEM EMS v1
Direct fire IGN-1A coils with MSD 10mm wires (Ludwig harness)
R6725-11 plugs x4 (tried new set of 10.5's as well)
My tune is spot on at 22 psi and the car runs great down low and up top. If I start to turn the boost up past 22 (25+ usually), sometimes it will run perfect (11.5afr), but most of the time it bogs and goes super rich (9.7afr). It feels like it's missing or blowing the spark out. I've tried different plugs and wires. I'm running 4.5ms of dwell on the coils with 5.2ms dwell above 4500 rpm.
I wanted to see if anyone else has had this issue or had any suggestions for it. Should I try different plugs or do you think it's something else?
Thanks,
Copeland
#2
Senior Member
iTrader: (10)
My current setup:
Gtx4294r 1.0 t4 exhaust housing
4" exhaust
Large streetport motor
E85 fuel (4xID2000, 2xBosch 044 pumps, parallel -6 lines)
AEM EMS v1
Direct fire IGN-1A coils with MSD 10mm wires (Ludwig harness)
R6725-11 plugs x4 (tried new set of 10.5's as well)
My tune is spot on at 22 psi and the car runs great down low and up top. If I start to turn the boost up past 22 (25+ usually), sometimes it will run perfect (11.5afr), but most of the time it bogs and goes super rich (9.7afr). It feels like it's missing or blowing the spark out. I've tried different plugs and wires. I'm running 4.5ms of dwell on the coils with 5.2ms dwell above 4500 rpm.
I wanted to see if anyone else has had this issue or had any suggestions for it. Should I try different plugs or do you think it's something else?
Thanks,
Copeland
Gtx4294r 1.0 t4 exhaust housing
4" exhaust
Large streetport motor
E85 fuel (4xID2000, 2xBosch 044 pumps, parallel -6 lines)
AEM EMS v1
Direct fire IGN-1A coils with MSD 10mm wires (Ludwig harness)
R6725-11 plugs x4 (tried new set of 10.5's as well)
My tune is spot on at 22 psi and the car runs great down low and up top. If I start to turn the boost up past 22 (25+ usually), sometimes it will run perfect (11.5afr), but most of the time it bogs and goes super rich (9.7afr). It feels like it's missing or blowing the spark out. I've tried different plugs and wires. I'm running 4.5ms of dwell on the coils with 5.2ms dwell above 4500 rpm.
I wanted to see if anyone else has had this issue or had any suggestions for it. Should I try different plugs or do you think it's something else?
Thanks,
Copeland
#12
Racing Rotary Since 1983
iTrader: (6)
i had erratic spark up top at 27 psi w a GT4094r w the IGN-1A coils at 4.5 dwell. we dropped the gap to .023 it has worked well.
i just got off the dyno w another one of my engines also w a GT4094r E85 27 psi etc and seem to have found a really nice plug. ( thanks to my customer as to the plug pick)
NGK BR10 EG. it is a racing plug w a resisitor which is somewhat unusual. the copper nickel ground strap works well w inductive and it has a smallish center electrode. special socket needed.
i am sure this isn't news to many but it was to me and i am impressed and will be running it going forward. a nice light brown color so it seems to be happy in the 575 power range to 9000. around five bucks.
stay in touch as you have a killer turbo.
Howard
i just got off the dyno w another one of my engines also w a GT4094r E85 27 psi etc and seem to have found a really nice plug. ( thanks to my customer as to the plug pick)
NGK BR10 EG. it is a racing plug w a resisitor which is somewhat unusual. the copper nickel ground strap works well w inductive and it has a smallish center electrode. special socket needed.
i am sure this isn't news to many but it was to me and i am impressed and will be running it going forward. a nice light brown color so it seems to be happy in the 575 power range to 9000. around five bucks.
stay in touch as you have a killer turbo.
Howard
#13
talking head
been running the BR10 EG for last 24 months in my daily ( on LPG fuel ) at a 0.60 mm/ .0236 gap on ls1 coils with 4.5 ms dwell
( LPG being notoriously hard to spark )
and it will run out to 20 psi at times if i allow it
however swapping in a set of old b9 egv's ( not noise suppressed ) will lift the idle speed and quality and response seems a bit better down low
( but the b9 egv wont support 20 psi cleanly or for long )
i would suggest the non suppressed version B10 EG is possibly the best option for down low and up top.. provided you have the trigger setup and filters to cope with RFI signal colouration of the CAS pickups
( LPG being notoriously hard to spark )
and it will run out to 20 psi at times if i allow it
however swapping in a set of old b9 egv's ( not noise suppressed ) will lift the idle speed and quality and response seems a bit better down low
( but the b9 egv wont support 20 psi cleanly or for long )
i would suggest the non suppressed version B10 EG is possibly the best option for down low and up top.. provided you have the trigger setup and filters to cope with RFI signal colouration of the CAS pickups
Last edited by Howard Coleman; 08-09-14 at 07:19 AM.
#14
Senior Member
iTrader: (38)
i had erratic spark up top at 27 psi w a GT4094r w the IGN-1A coils at 4.5 dwell. we dropped the gap to .023 it has worked well.
i just got off the dyno w another one of my engines also w a GT4094r E85 27 psi etc and seem to have found a really nice plug. ( thanks to my customer as to the plug pick)
NGK BR10 EG. it is a racing plug w a resisitor which is somewhat unusual. the copper nickel ground strap works well w inductive and it has a smallish center electrode. special socket needed.
i am sure this isn't news to many but it was to me and i am impressed and will be running it going forward. a nice light brown color so it seems to be happy in the 575 power range to 9000. around five bucks.
stay in touch as you have a killer turbo.
Howard
i just got off the dyno w another one of my engines also w a GT4094r E85 27 psi etc and seem to have found a really nice plug. ( thanks to my customer as to the plug pick)
NGK BR10 EG. it is a racing plug w a resisitor which is somewhat unusual. the copper nickel ground strap works well w inductive and it has a smallish center electrode. special socket needed.
i am sure this isn't news to many but it was to me and i am impressed and will be running it going forward. a nice light brown color so it seems to be happy in the 575 power range to 9000. around five bucks.
stay in touch as you have a killer turbo.
Howard
#18
Racing Rotary Since 1983
iTrader: (6)
here's the link to NGK specs
http://www.ngksparkplugs.com/docs/RacingSpecs2013.pdf
i believe two BR10EG plugs are listed
product code 3993 is "SOLID", i believe that means the plug end does not screw off
product code 3830 is "LOOSE" and has a threaded tip.
Sparkplugs.com indicates as such.
HC
http://www.ngksparkplugs.com/docs/RacingSpecs2013.pdf
i believe two BR10EG plugs are listed
product code 3993 is "SOLID", i believe that means the plug end does not screw off
product code 3830 is "LOOSE" and has a threaded tip.
Sparkplugs.com indicates as such.
HC
#19
talking head
thinks the term "solid" and "loose" may refer to the presence of the indexing washer gasket
loose ( 3830 ) is the traditional version most of us would expect
loose ( 3830 ) is the traditional version most of us would expect
#20
www.lms-efi.com
iTrader: (27)
Solid and loose refer to the top of the plug, when the plug wire connects. The solid plugs have the terminal permanently attached. Loose terminals are screwed on and can be removed. Some bikes and small engines run without the terminal and the plug wire attaches directly to the threaded stud underneath the "loose" terminals.
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Relisys190 (09-06-22)
#22
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Join Date: Jun 2011
Location: Brisbane Australia
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been running the BR10 EG for last 24 months in my daily ( on LPG fuel ) at a 0.60 mm/ .0236 gap on ls1 coils with 4.5 ms dwell
( LPG being notoriously hard to spark )
and it will run out to 20 psi at times if i allow it
however swapping in a set of old b9 egv's ( not noise suppressed ) will lift the idle speed and quality and response seems a bit better down low
( but the b9 egv wont support 20 psi cleanly or for long )
i would suggest the non suppressed version B10 EG is possibly the best option for down low and up top.. provided you have the trigger setup and filters to cope with RFI signal colouration of the CAS pickups
( LPG being notoriously hard to spark )
and it will run out to 20 psi at times if i allow it
however swapping in a set of old b9 egv's ( not noise suppressed ) will lift the idle speed and quality and response seems a bit better down low
( but the b9 egv wont support 20 psi cleanly or for long )
i would suggest the non suppressed version B10 EG is possibly the best option for down low and up top.. provided you have the trigger setup and filters to cope with RFI signal colouration of the CAS pickups
I was told to run the coldest plugs possible.
Are the br10eg 's gonna work well and last well with this set up? Or do I really need to spend 40-50 per plug for the others?
It will be a daily driver set to 16psi 500hp ish plus some drift racing with more boost and 600-700hp.
Advice appreciated.
#23
Plug Boot Design
The Plug Boot Design needs to be pictured, MUST touch steel.
Would it be possible to send a picture ?
You could state your BMEP then I could test in my CO-2 Chamber.
Your could ALSO state you coil Duty Cycle.
Lance
Would it be possible to send a picture ?
You could state your BMEP then I could test in my CO-2 Chamber.
Your could ALSO state you coil Duty Cycle.
Lance
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