Aftermarket Ignition Amps, advanced plug wear?
11-05-09, 01:12 PM
#1
Aftermarket Ignition Amps, advanced plug wear?
Since i have upgraded my ignition with a fc1000 i have noticed that my plugs seem to be wearing a lot faster(rounded electrode). I was wondering if aftermarket ignition amps cause advanced plugs wear?
11-07-09, 11:59 PM
#7
Yes colder plugs should help. The greddy race plugs seem to hold up a lot better too. I used to run b9egv's with a twin power and they didn't even last between an oil change. (burned up the electrode) now running greddy re10's (rebadged ngk r7420's) and been going strong so far. A lot of guys run these plugs for years with strong ignition systems.
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11-08-09, 11:07 AM
#9
Supposedly. I have had them for a few months and so far outlasted the egv's by quite a bit. Rice racing swears by the greddy race plugs. They are made with better materials and for the cost i would sure hope they last. They do make the car run better too.
11-09-09, 09:47 AM
#13
GRD_SP-13000150 is the part number for the plugs, o22-3989 also works when searching for them. I found them for $116 shipped, ($29 EA) but the place where I bought them has gone up on their price. I did find another shop for the same price, but I don't remember where it was. Just have to search.
The greddy plugs are exactly the same as the NGK 7420's just a lower price.
How have your 7420's been holding up hondahater?
The greddy plugs are exactly the same as the NGK 7420's just a lower price.
How have your 7420's been holding up hondahater?
11-09-09, 03:30 PM
#15
Only if your 9's are overheating. One needs to carefully read the plugs to determine this. Heat range is closely related to combustion temperature & pressures; it is not determined by the ignition system except to say that a high output ignition may be able to fire colder plugs more effectively. Plug wear will increase with high output and multi-spark ignitions. This is not affected by or related to the plug's heat range.
11-09-09, 04:03 PM
#17
The spark plug has to reach optimal auto cleaning temperature, at this temp most carbon and other deposits are burned off the plug during operation. Once you find the right heat balance, fouling won't be a problem. If the temperature is too high pre ignition, or plug failure (shattered porcelin) of melted/failed electrodes can occur.
If you idle around in your car and drive like a grandma then you will need the BS gay hot plugs to keep them clean. If you drive your car like it should be driven then you need to choose the correct plug for the job. 10's seem to be the best compromise for our cars.
Also if you have a good strong ignition system then you can run the right plug, and not worry about putting the gay scorcher plugs in your engine.
If you idle around in your car and drive like a grandma then you will need the BS gay hot plugs to keep them clean. If you drive your car like it should be driven then you need to choose the correct plug for the job. 10's seem to be the best compromise for our cars.
Also if you have a good strong ignition system then you can run the right plug, and not worry about putting the gay scorcher plugs in your engine.
11-09-09, 04:59 PM
#18
right on, this bill is gonna hurt the pockets though 
29.95 a plug is the best i can find right now. Someone chime in if you know of a better place to get these. Also if your running them let me know how many miles you have had them because it better be a long *** while for this price haha.
29.95 a plug is the best i can find right now. Someone chime in if you know of a better place to get these. Also if your running them let me know how many miles you have had them because it better be a long *** while for this price haha.
11-09-09, 05:16 PM
#19
Plug wear will increase with high output and multi-spark ignitions.
Oh yes, I forgot to mention that I turn my multispark off and they still last 3,000miles on the leading (with amps/coils).
Since I run 10s all around I rotate the trailings (stock ignition- no wear) to the leading position and put new plugs in the trailing.
I save the old worn leading plugs with the huge gap for start ups on rebuilds where the large gap just means more spark/ easier starts since I won't be running them in full boost/ high rpm where the large gap gets quenched.
Oh yes, I forgot to mention that I turn my multispark off and they still last 3,000miles on the leading (with amps/coils).
Since I run 10s all around I rotate the trailings (stock ignition- no wear) to the leading position and put new plugs in the trailing.
I save the old worn leading plugs with the huge gap for start ups on rebuilds where the large gap just means more spark/ easier starts since I won't be running them in full boost/ high rpm where the large gap gets quenched.
11-09-09, 08:09 PM
#20
Racing Rotary Since 1983
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as you raise your ignition output your plug life takes a dive.
one of the features i like about the Jacobs FC3000 amp is that it has a cruise mode (reduced output). it goes to full output as it senses acceleration or load... i am not sure on the details.
all i know is that my plugs NGK 6725 10.5 last a fairly long time. when i initially started running methanol with my elec setup i was stupid rich and had no misfires at 9.2 AFR!
i run two amps and two MSD 8253 coils. one each on a lead plug. overkill but i like it.
BTW, you want to try to run fairly cold plugs as most of the motors i see have cracks around the spark plug boss from too much heat. in addition, this heat distorts the area on the housing causing the everpresent carbon/oil tracings indicating compression lossage.
hc
one of the features i like about the Jacobs FC3000 amp is that it has a cruise mode (reduced output). it goes to full output as it senses acceleration or load... i am not sure on the details.
all i know is that my plugs NGK 6725 10.5 last a fairly long time. when i initially started running methanol with my elec setup i was stupid rich and had no misfires at 9.2 AFR!
i run two amps and two MSD 8253 coils. one each on a lead plug. overkill but i like it.
BTW, you want to try to run fairly cold plugs as most of the motors i see have cracks around the spark plug boss from too much heat. in addition, this heat distorts the area on the housing causing the everpresent carbon/oil tracings indicating compression lossage.
hc
Last edited by Howard Coleman; 11-09-09 at 08:16 PM.
11-09-09, 09:27 PM
#21
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cool, I run the same plugs/amp Howard, except on stock TII leading coil (single amp). What kind of life are you getting out of your 6725's?
11-10-09, 07:09 AM
#22
GRD_SP-13000150 is the part number for the plugs, o22-3989 also works when searching for them. I found them for $116 shipped, ($29 EA) but the place where I bought them has gone up on their price. I did find another shop for the same price, but I don't remember where it was. Just have to search.
The greddy plugs are exactly the same as the NGK 7420's just a lower price.
How have your 7420's been holding up hondahater?
The greddy plugs are exactly the same as the NGK 7420's just a lower price.
How have your 7420's been holding up hondahater?
My ignition is four lx92 coils and two crane hi-6's amps and an x4 microtech box. I'll be running r7420 10.5's in the leading and 6725 11's in the trailing.
thanks for the info on the greddy plug. I'll get those next time.
Last edited by hondahater; 11-10-09 at 07:20 AM.
11-10-09, 04:53 PM
#24
The NGK r7420's are much better plugs. The 6725's use a platinum ground and center, while the 7420's use iridium center and platinum ground.
Iridium has a 700 degree C higher melting point then platinum, This allows the tip to be made smaller, which means you get a hotter spark from lower voltage requirements, and also decreased electrode wear.
Iridium has a 700 degree C higher melting point then platinum, This allows the tip to be made smaller, which means you get a hotter spark from lower voltage requirements, and also decreased electrode wear.
11-10-09, 05:48 PM
#25
Here's some other information.
The BR10EIX's are also iridium but don't have the platinum ground, which reduces the it's life. I also found some information that the EX series are only tipped with iridium. I've heard of this tip breaking off in in some cases too. Other then that they should be a decent plug, with decent life.
The B10EGV's are non resistor plugs with a Gold palladium center. This is very good for spark output, but the melting point is much lower then both platinum and iridium, ground strap is made of nickel alloy so both of these characteristics make plug life pretty low. (I can attest to this) Great high output plug if you don't mind replacing it all the time.
The R6725's: Platinum center and platinum ground, lower melting point then iridium and a higher resistance. Should have a much better plug life then the EGV's but with higher resistance. (lower spark output) Not worth the hefty price IMO.
R7420's Iridium center + platinum ground. Higher spark output due to the smaller electrode, plus longer plug life due to iridium center, and platinum ground. Very good plug and expensive. Should cost less in the long run over the EGV's. Noticeable improvement in how the engine runs with these plugs.(personally running them)
The BR10EIX's are also iridium but don't have the platinum ground, which reduces the it's life. I also found some information that the EX series are only tipped with iridium. I've heard of this tip breaking off in in some cases too. Other then that they should be a decent plug, with decent life.
The B10EGV's are non resistor plugs with a Gold palladium center. This is very good for spark output, but the melting point is much lower then both platinum and iridium, ground strap is made of nickel alloy so both of these characteristics make plug life pretty low. (I can attest to this) Great high output plug if you don't mind replacing it all the time.
The R6725's: Platinum center and platinum ground, lower melting point then iridium and a higher resistance. Should have a much better plug life then the EGV's but with higher resistance. (lower spark output) Not worth the hefty price IMO.
R7420's Iridium center + platinum ground. Higher spark output due to the smaller electrode, plus longer plug life due to iridium center, and platinum ground. Very good plug and expensive. Should cost less in the long run over the EGV's. Noticeable improvement in how the engine runs with these plugs.(personally running them)