track report
09-13-2004, 09:09 PM
#21
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That "lead fouling" makes sense.
Too bad there aren't any easy answers on here for you.
Check out what I found about lead fouling. It seems to support your idea.
http://www.sacskyranch.com/acatalog/...tives_112.html
http://www.mattsauto.com/p1.htm
http://www.mattsauto.com/e1.htm
I know when I go flying, that sometimes the plugs are slightly fouled. When we are doing the runup, we bring the engine up to about 2000 rpm with the brakes on and lean it out until peak EGT is reached. We then hold it there for a few seconds and it usually cleans up and the rpms increase.
I dont know how safe that would be with your setup, but maybe a little more lean could help the situation.
Too bad there aren't any easy answers on here for you.
Check out what I found about lead fouling. It seems to support your idea.
http://www.sacskyranch.com/acatalog/...tives_112.html
http://www.mattsauto.com/p1.htm
http://www.mattsauto.com/e1.htm
I know when I go flying, that sometimes the plugs are slightly fouled. When we are doing the runup, we bring the engine up to about 2000 rpm with the brakes on and lean it out until peak EGT is reached. We then hold it there for a few seconds and it usually cleans up and the rpms increase.
I dont know how safe that would be with your setup, but maybe a little more lean could help the situation.
09-13-2004, 11:45 PM
#23
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I have quite a bit of experiance with missing ignition from Syclones and Typhoons. With C16 if we put in a new set of plugs we would get about there runs out of them before they would foul and start to miss.
We where using TR6 plugs but went one step hotter to TR5's this helped a bit but it would still happen. We we then changed to Denso iridium plugs and can now go to the track about 5-6 times running c16 and 25+ psi before we have any problems. I converted my Typhoon to LS1 truck coils and run the densos at .028 plug gap. Last time at the track I ran 30psi with no breakup at all. C16 kills plugs fast with the high content of Lead on pump gas and 14 psi we have zero problems but plug gaps are in teh .030-0.28 range.
Hope that helps some..
Nolan Nykyforuk
We where using TR6 plugs but went one step hotter to TR5's this helped a bit but it would still happen. We we then changed to Denso iridium plugs and can now go to the track about 5-6 times running c16 and 25+ psi before we have any problems. I converted my Typhoon to LS1 truck coils and run the densos at .028 plug gap. Last time at the track I ran 30psi with no breakup at all. C16 kills plugs fast with the high content of Lead on pump gas and 14 psi we have zero problems but plug gaps are in teh .030-0.28 range.
Hope that helps some..
Nolan Nykyforuk
09-14-2004, 08:13 AM
#27
Originally Posted by BenKey
You might look into this to see if it will work, not sure:
MSD It does say distributorless and 8 channel.
Also, you might look into Beru Silverstone plugs. Fairly expensive. They have a 99.9% pure sterling silver electrode and supposed to have 137% more spark power. They can be found numerous places. Here is one: Silverstone plugs . The Harley F-150, blown version, guys have had pretty good luck using them, although your setup is a little different. Maybe go to their site and ask how they like them. They use the S1K, or S2K.
MSD It does say distributorless and 8 channel.
Also, you might look into Beru Silverstone plugs. Fairly expensive. They have a 99.9% pure sterling silver electrode and supposed to have 137% more spark power. They can be found numerous places. Here is one: Silverstone plugs . The Harley F-150, blown version, guys have had pretty good luck using them, although your setup is a little different. Maybe go to their site and ask how they like them. They use the S1K, or S2K.
There have been a few posts about the Nology stuff, and not one person had anything good to say about them.
https://ls1tech.com/forums/showthrea...ghlight=nology
https://ls1tech.com/forums/showthrea...ghlight=nology
09-14-2004, 08:05 PM
#28
the more i research it the more it looks like lead fouling is my problem. check out this page >> http://www.sacskyranch.com/faq_spark_plug/FAQ00007.html
"We believe that the rate ot which the power is changed is an important factor. If, after extended idling on the ground, takeoff power is suddenly applied, so that the accumulated deposits are suddenly raised above their melting poing instead of being given time to burn off during a more gradual increase of power, we would expect a greater likelihood of fouling."
looks like too cool of a combustion chamber along with extended rich periods followed by full throttle are what causes it. sounds like me. my a/f ratio is right on at idle but when cruzing it is more in the 13.5 range. maybe if i get that leaned out a little it will help along with better miliage. it also sugests slower aplication of full throttle but that isn't an option, i can't really keep it on the edge of missing for an extended period of time like an airplane might be able to do.
my oil looks funny too. it has a matalic/grey residue in it. i bet that is some lead too. time to change the oil. for now i think i will try leaning it out and just have an extra set of plugs ready to go. if that doesn't work i will try the denso's.
"We believe that the rate ot which the power is changed is an important factor. If, after extended idling on the ground, takeoff power is suddenly applied, so that the accumulated deposits are suddenly raised above their melting poing instead of being given time to burn off during a more gradual increase of power, we would expect a greater likelihood of fouling."
looks like too cool of a combustion chamber along with extended rich periods followed by full throttle are what causes it. sounds like me. my a/f ratio is right on at idle but when cruzing it is more in the 13.5 range. maybe if i get that leaned out a little it will help along with better miliage. it also sugests slower aplication of full throttle but that isn't an option, i can't really keep it on the edge of missing for an extended period of time like an airplane might be able to do.
my oil looks funny too. it has a matalic/grey residue in it. i bet that is some lead too. time to change the oil. for now i think i will try leaning it out and just have an extra set of plugs ready to go. if that doesn't work i will try the denso's.
09-14-2004, 11:24 PM
#29
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I tune all the trucks here for closed loop driving at 14.7 and idle for about 13.5 this gives better gas miliage and the trucks run great. On the race chips I set up the idle leaner to 14.7. The idle surges a bit (84lbs injectors) but the plugs do not load up as quick on the C16.
Nolan Nykyforuk
Nolan Nykyforuk
09-15-2004, 02:10 AM
#30
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I know when we in cruise flight we can lean the plane pretty far, peak EGT for economy, and 125*F rich of peak EGT for performance.
I just dont wanna see your enigine go
The engine is the Piper Seminole and Cessna 172 I fly is a Lycoming rated at 180hp@2700rpm
meaning:
360 cube
8.5:1 compression ratio
air cooled
flat-four
We do have the advantage of dual sparkplugs though.
I just dont wanna see your enigine go
The engine is the Piper Seminole and Cessna 172 I fly is a Lycoming rated at 180hp@2700rpm
meaning:
360 cube
8.5:1 compression ratio
air cooled
flat-four
We do have the advantage of dual sparkplugs though.
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