Denso Iridium TT (Twin-Tipped) Spark Plugs
Denso Iridium TT (Twin-Tipped) Spark Plugs
Anybody have any news/reviews on these plugs? According to the video seems to be very beneficial over OEM Denso's at half the price.
Denso Iridium TT Spark Plugs
video at: http://densott.com/
from rockauto.com they sell for under $6 ea.... "technologically advanced Denso Iridium TT (Twin Tip) Spark Plugs. This patented design was first used on OE Denso spark plugs for luxury and performance cars, but now this technology is available to everyone. The unique design literally features two "tips": an iridium center electrode tip, and a platinum ground electrode tip. Unlike conventional plugs with large center and ground electrodes that increase “quenching” of the explosion (meaning the spark explosion is restricted), the Twin Tips allow for an omnidirectional explosion with minimal quenching.
With less interference to spark growth, fewer misfires, and significantly improved combustion, you can be sure that power output and fuel economy are maximized. Denso TT plugs also feature the highest concentration of iridium in any spark plug to successfully resist voltage wear and oxidation for over 100,000 miles. If you're looking for a plug that will take you farther with less gas and require fewer replacements, look no further than the Denso Iridium TT."
Denso Iridium TT Spark Plugs
video at: http://densott.com/
from rockauto.com they sell for under $6 ea.... "technologically advanced Denso Iridium TT (Twin Tip) Spark Plugs. This patented design was first used on OE Denso spark plugs for luxury and performance cars, but now this technology is available to everyone. The unique design literally features two "tips": an iridium center electrode tip, and a platinum ground electrode tip. Unlike conventional plugs with large center and ground electrodes that increase “quenching” of the explosion (meaning the spark explosion is restricted), the Twin Tips allow for an omnidirectional explosion with minimal quenching.
With less interference to spark growth, fewer misfires, and significantly improved combustion, you can be sure that power output and fuel economy are maximized. Denso TT plugs also feature the highest concentration of iridium in any spark plug to successfully resist voltage wear and oxidation for over 100,000 miles. If you're looking for a plug that will take you farther with less gas and require fewer replacements, look no further than the Denso Iridium TT."
^^^^As do many other Lexus models. I'm going to try them on my ISF when it's time. My post from the ISF Forum:
Lou
I'm not ready yet, but when it's time I'm going to do it myself. I will stick with Denso, but I've been doing some research and found there are two other Iridium plugs in addition to the OEM FK20HBR11 that Denso makes for Toyota vehicles.
They are:
1. The IKBH20TT, a Iridium Twin Tip series plug that seems to have many advantages over the stock plug, however it's much cheaper
http://densott.com
2. VFKBH20, a Iridium Tough series plug that is supposed to maximize performance. But, this plug seems to be available only in Europe and Japan
http://www.globaldenso.com/en/produc...2011/03_1.html
They are:
1. The IKBH20TT, a Iridium Twin Tip series plug that seems to have many advantages over the stock plug, however it's much cheaper
http://densott.com
2. VFKBH20, a Iridium Tough series plug that is supposed to maximize performance. But, this plug seems to be available only in Europe and Japan
http://www.globaldenso.com/en/produc...2011/03_1.html
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twin tip technology, hmm... could be beneficial, or just a method to make due with using less iridium, (super rare asteroid stuff). seems like the TT uses 0.4mm compare to the 0.7mm of the oem plugs. Not sure if thinner is better in this case
The factory plugs are a tri-tip high ignitability 0.55mm Iridium design, not sure if these would be better than them or not, these seem to be a lower priced alternative to the IK series Iridium Powers, possibly longer lasting.
I posted some more detailed information about the stock plugs before, take a look, it seems these offer not much if any benefit over the factory ones, beyond cost I would think.
Jeff
I posted some more detailed information about the stock plugs before, take a look, it seems these offer not much if any benefit over the factory ones, beyond cost I would think.
Jeff
There are different types of iridium spark plugs, they are definitely not all the same.
0.7mm electrode ultra long-life Denso plugs (which many Toyota/Lexus models do use) are rated for 120K miles, while others like the 0.4mm electrode iridium power plugs are only rated for 30K miles (source). The iridium plugs in the 2IS engines are the Denso "high ignitability" FK20HBR11, with a 0.55mm electrode (source). The combustion conditions can also affect how long a plug will last, in the case of Lexus D4/D4-S engines that use the FK20HBR11 Denso plugs, they are all rated for 60K mile service intervals (source), including 2006-2007 models (source: 2006 Lexus IS250/350 NCF book, Lexus Pub. No. NM0140U, page EG-37 & EG-130, first printing: July 25, 2005).
Excerpt from MY2006 NCF, Page EG-37:
Jeff
0.7mm electrode ultra long-life Denso plugs (which many Toyota/Lexus models do use) are rated for 120K miles, while others like the 0.4mm electrode iridium power plugs are only rated for 30K miles (source). The iridium plugs in the 2IS engines are the Denso "high ignitability" FK20HBR11, with a 0.55mm electrode (source). The combustion conditions can also affect how long a plug will last, in the case of Lexus D4/D4-S engines that use the FK20HBR11 Denso plugs, they are all rated for 60K mile service intervals (source), including 2006-2007 models (source: 2006 Lexus IS250/350 NCF book, Lexus Pub. No. NM0140U, page EG-37 & EG-130, first printing: July 25, 2005).
Excerpt from MY2006 NCF, Page EG-37:
Jeff
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"I posted some more detailed information about the stock plugs before, take a look, it seems these offer not much if any benefit over the factory ones, beyond cost I would think.
Jeff"
i put them in they seem to run fine. no issues for the last few days. apparently they are used in the newer LS motor i believe the 430 and up. Haven't seen any real jump with gas mileage. I had a fouled plug so the slight change i attribute to fixing the old issue.
When i was searching I thought i saw these as the model numbers under the LS owners manual. I could be wrong.
