Bosch +2 Plugs
03-02-04, 02:40 PM
#1
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Bosch +2 Plugs
Hey has anyone here used the Bosch +2 (or +4 for that matter) plugs on their N/A? Personally I have always had good luck with these in my Piston driven engines but wnat to know if they are a wise idea in a rotary?
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Last edited by Aaron Cake; 03-03-04 at 03:30 PM.
03-02-04, 02:45 PM
#3
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Stick with the NGK's, NGK has some different plugs than stock that are good for race cars, but realyl no reason to spend more money on plugs that are different than stock. BUR7EQ and BUR9EQ all the way.
03-02-04, 02:57 PM
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The rotary engine eats steel leading plugs.
For me the NGK platinum leading plugs are a good value.
Clearance dimensions are absolutely critical.
A mis-fit off-brand plug can destroy the motor.
For me the NGK platinum leading plugs are a good value.
Clearance dimensions are absolutely critical.
A mis-fit off-brand plug can destroy the motor.
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03-02-04, 10:31 PM
#12
Former Moderator. RIP Icemark.
Originally posted by RETed
On the NA vert?
-Ted
On the NA vert?
-Ted
Using the IRE01-27 as the leading plugs.
Iridium is a precious metal that is 6 times harder and 8 times stronger than platinum, it has a 1,200=F higher melting point than platinum and conducts electricity better. This makes it possible to create the finest wire center electrode ever. Prior till now, spark plug manufacturers have favored platinum for their long life or performance spark plugs due to its high melting point, also the technology did not exist to machine and bond iridium on a spark plug electrode(at least in a cost effective manner). Champion spark plugs had already made an iridium industrial application spark plug, but it still sells for over a hundred dollars per plug. Just now is the technology available to effectively use iridium in a spark plug for automotive applications. The strength, hardness and high melting point of iridium make it very well suited for a fine wire plug. The primary iridium plug manufacturers at this time are Denso with a 0.4mm center electrode and NGK with a 0.7mm center electrode. Both are the best performance plugs on the market for traditional automotive use and many racing applications.
Last edited by Icemark; 03-02-04 at 10:52 PM.
03-02-04, 10:49 PM
#13
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Cool!
I just managed to put all the Denso Ir stuff on my webpage...
http://fc3spro.com/TECH/MODS/IGN/plugs.htm
-Ted
I just managed to put all the Denso Ir stuff on my webpage...
http://fc3spro.com/TECH/MODS/IGN/plugs.htm
-Ted
03-02-04, 10:56 PM
#14
Former Moderator. RIP Icemark.
They were $35 each from sparkplugs.com, but if they last 2 or 3 times longer (which every indication is that they will) than the standard NGK they will have paid for themselves.
03-03-04, 12:19 AM
#15
I R SAD PANDA W/O BAW
Originally posted by Icemark
They were $35 each from sparkplugs.com, but if they last 2 or 3 times longer (which every indication is that they will) than the standard NGK they will have paid for themselves.
They were $35 each from sparkplugs.com, but if they last 2 or 3 times longer (which every indication is that they will) than the standard NGK they will have paid for themselves.
03-03-04, 12:21 AM
#16
Former Moderator. RIP Icemark.
Originally posted by ilike2eatricers
Will they fare the same on a modded TII? Anybody have experience with the iridiums or platinums?
Will they fare the same on a modded TII? Anybody have experience with the iridiums or platinums?
03-03-04, 12:27 AM
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140$ is crazy for spark plugs! well, then again I have never bought new plugs for mine yet, it's still new to me, but it's just that I am used to paying 2-5$ a plug. dam...later
03-03-04, 12:59 AM
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Originally posted by Icemark
They were $35 each from sparkplugs.com, but if they last 2 or 3 times longer (...) they will have paid for themselves.
They were $35 each from sparkplugs.com, but if they last 2 or 3 times longer (...) they will have paid for themselves.
Wait, are those the ones with the bigger gap, better with CDI systems?
03-03-04, 01:19 AM
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Re: Bosch +2 Plugs
Originally posted by Froggmann
Hey has anyone here used the Bosch +2 (or +4 for that matter) plugs (...) I have always had good luck with these in my Piston driven engines
Hey has anyone here used the Bosch +2 (or +4 for that matter) plugs (...) I have always had good luck with these in my Piston driven engines
03-03-04, 06:39 AM
#22
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Originally posted by h20scorpio
I use the autolite plugs(1.50 from kragen... scary..), and they seem to work just as well as the stock NGK. What do you guys have to say to that?
I use the autolite plugs(1.50 from kragen... scary..), and they seem to work just as well as the stock NGK. What do you guys have to say to that?
They have been known to drop their center electrode and possibly take out your engine.
-Ted
03-03-04, 11:39 AM
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Originally posted by RETed
Autolite 2626, right?
They have been known to drop their center electrode and possibly take out your engine.
-Ted
Autolite 2626, right?
They have been known to drop their center electrode and possibly take out your engine.
-Ted
Someone should sue them.
Thanks for the info.
Shin
03-03-04, 11:52 AM
#24
Former Moderator. RIP Icemark.
Originally posted by Kai
How much do you pay for NGK's? For them to be cost effective for me, they'd have to last about 7 times longer (~$5 per NGK, from my dealer.)
Wait, are those the ones with the bigger gap, better with CDI systems?
How much do you pay for NGK's? For them to be cost effective for me, they'd have to last about 7 times longer (~$5 per NGK, from my dealer.)
Wait, are those the ones with the bigger gap, better with CDI systems?
My basicly stock 99 3.4 V6 Tacoma burns through NGK plugs in about 20K miles as well, so I replaced those with the Iridiums as well, but they were considerably cheaper for the Truck than for the FC. There was a noticable difference in both fuel economy and power, but I have not dyno'd it to see how much (it is just a truck after all).
Denso claims a solid 11 HP peak on dyno testing on a 13BREW in a S6. They claim they dyno'd a turbo'd Civic and got 35Hp out of just replacing plugs with Iridiums. I am guessing closer to 5 HP is realistic on a S4/S5.
I don't use the Bosch Plantinum plugs because I used to crack the center insulators when I used them on my old Sport.
Remember for a fast hot spark, the edges of the plug firing surface can not be rounded. Any rounded edges require spark energy to increase just to fire, and will fire will a cooler temp spark (not to be confused with a cooler temp plug).
Last edited by Icemark; 03-03-04 at 12:00 PM.
03-03-04, 11:57 AM
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Originally posted by Icemark
I am using the Denso Iriduim plugs for my leading have seen a noticeable increase in HP and plug life.
I am using the Denso Iriduim plugs for my leading have seen a noticeable increase in HP and plug life.
Is the Denso plug similar in configuration to the NGk's? Similar heat range? I'm assuming that you haven't had any problems with the plugs fowling?