What plug is better? I have read that the Iridiums get the GS400 a +12 HP. Are TorqueMaster's just as good?

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our stock plugs are already iradium right?

dunno much about TM though, the dyno some while ago looks pretty good

 

I debated TM's but decided to go with what the gs4 calls for, Denso Iridium.

 

someone help us out here!!!

 

Yeah - we need some insight on this thread. Do stock GS plugs already have Iridium or what?

 

i read the manual of my car, and if memory serves me right, it says our car is already using iradium plugs (took me 3 freaking nights to finish the whole manual coz' it's so boring)

 

I will tell you something scarry... I have a 98S which I purchased new. I know the tech who has worked on my car from the dealership from day 1. I pulled 2 plugs from my engine recently to see how they were doing. The front plug looked good, however, the rear (driver plug) was a different plug! I just wanna see if anyone else has seen 2 diffenent plugs in their engine before.

 

lvGS400 - Not for a very long time. The easiest way to have this happen is to go to one of the quicky tune up places. If a plug is hard to get to, like a rear plug on a V engine, they just skip it. Doubt it happens at the dealer very much or better quality shops. Just gets to be a numbers thing on cars. If they can replace seven plugs in ten minutes but one plug takes twenty minutes by itself, I have seen them skip it. Older and wiser you like to do your own maintenance or get willing to pay a little more to have it done right.

 

The stock plug (GS400 '98+) IS a Denso Iridium. As for the +12 hp, using STOCK plugs, that's like pointing at the car 5 minutes later and saying "i've got 12 more horses" without doing anything. Would be nice, but it doesn't happen.

The 12+ horses come from the Torquemasters. Denso Iridiums have so much hype that ime, they should be considered as nothing special. Just a sales tactic.

NOTICE the Denso Iridiums will not get compared head to head (check their advertisements) to the Torquemasters. The TM plugs will kill them in every respect - bar none.

Percy
Running TM's since 1990.

 

Check out the past threads dealing with Iridium vs TM. There was something like 4 pages to the thread! Bottom line...TM is the best bet.

Percy

 

Good info - TM it is!!

Thanks for the help.

 

do the TM's dispate heat well?

 

All GS-400/430's have IRIDIUM spark plugs after 1998. Some of the early GS 400's in 1998 had Nippondenso platinum plugs installed. They are only good for 60,000 miles at best, and have to be replaced.

Iridium plugs are replaced during the 90,000 service if it is done at Lexus or a qualified repair shop along with the timing belt. They already perform superbly, so I stick with factory spark plugs.
Just my $.02
GSEREP1

 

[QUOTE]Originally posted by gserep1
[B]All GS-400/430's have IRIDIUM spark plugs after 1998. Some of the early GS 400's in 1998 had Nippondenso platinum plugs installed. They are only good for 60,000 miles at best, and have to be replaced.

***By contrast, Torquemasters have been clocked at WELL OVER 250,000 miles - and going extremely strong. This is with the "points" type ignition system which has far more current/spark than our systems in the GS. With the type of system we have, the projection is easily over 1 million miles. Something to think about. ***

Percy

 

Percy,

I think TM should really give you and Mean Gene some sore of discounts since you are such loyal customers and introduce TM to Club Lexus and the groupbuy....