: Best Spark Plug.... NGK-TR55



austin
04-19-06, 08:18 PM
Looking around for the best spark plug.... and i keep coming accross the NGK-TR55.... With a .055 gap as having the best idle quality. Anyone here using this setup?

Mat347
04-19-06, 08:33 PM
V-powers are good plugs, but I recommend iridium plugs, Denso's TR55IX would be the best followed by NGK's TR55IX. The idea is to unshroud the spark, which is done best with the thinnest electrode(densos=.4mm NGKs=.6mm). This can be done with regular materials but the plugs wouldn't last long. Iridium is harder and has a higher melting point than platinum, so they'll last much longer and can be used with nitrous. Initial testing showed ~10FWHP when swapping to the Densos.

lasstss
04-19-06, 09:46 PM
I have run TR-55's on the last two Force fed cars. They run
flawlessly and provide snappy throttle response along with a better Idle. The fancy high end plugs are for longevity. If you want good street performace use something that you throw a nice arc across. The TR55's are the bomb! and amazingly cheap! Run them a few thousand miles and change them out.

austin
04-19-06, 09:47 PM
>Run them a few thousand miles and chenge them out.

That's all the TR-55 are good for....... Maybe i should go with the NGK TR-55IX, would it be safe to say that they offer the same performance plus longevity? How long will the "IX" go before a change out. No nitros, stock, few minor mods.

lasstss
04-20-06, 07:52 AM
>Run them a few thousand miles and chenge them out.

That's all the TR-55 are good for....... Maybe i should go with the NGK TR-55IX, would it be safe to say that they offer the same performance plus longevity? How long will the "IX" go before a change out. No nitros, stock, few minor mods.

Of course they will last longer! (20-30K). I simply mean they for the price you can keep a new set in the car. $2 a peice? The iridums will last longer as they mimic the OEM platinums. Im not a fan of pinpoint contact. The arc size is reduced due to the smaller surface area. With the type of coils that we have where you are throwing 40K volts across the electrodes, surface area helps in my opinion. My old turbo set up used to run like crap with plat 4's. Too suceptable to blow out. (This is my opinion YMMV)
I also recommend a wire change at 30k or so. The OEM wires have had it around that time.

Mat347
04-20-06, 01:07 PM
>Run them a few thousand miles and chenge them out.

That's all the TR-55 are good for....... Maybe i should go with the NGK TR-55IX, would it be safe to say that they offer the same performance plus longevity? How long will the "IX" go before a change out. No nitros, stock, few minor mods.

They have proven BETTER performance and will last longer than other plugs, including platinum which used to be the longest lasting plugs made. Spark exposure is the entire reason for V tips, split fires and others. Look at NGKs racing plugs, they simply use a thin wire as an electrode. They shouldn't be used on the street, but they will make the most power and resist misfires.

Lasstss, plug surface area is good on regular brass/copper type plugs where carbon deposits kill the spark. Meaning a spark will choose the path of least resistance, where on regular plugs it will spark in the same place until there's enough carbon to cause it to move to the next location with lower resistance. Platinum is much harder than regular plugs and resists the carbon buildup, iridium is even harder than platinum and does an even better job at it. This allows the use of fine electrodes which produce a more powerful, centralized spark that also gives the most unshrouded kernal exposure. Actually, My turbocharged jet ski(Aquatrax F12X) came with NGK iridiums.
Here...this might explain it better than I can...
http://www.densoiridium.com/faq.php

Let me correct myself, the Denso plugs are P# IT16, NGKs are the 55IX.

CIWS
04-20-06, 01:23 PM
Those Denso plugs are 12.00 each ?

edit- yeah that's them (NM) ;)

Mat347
04-20-06, 02:48 PM
The NGKs are $7 FWIW.

lasstss
04-20-06, 08:57 PM
The NGKs are $7 FWIW.

http://ngk.carshopinc.com/product_info.php/products_id/40948/TR55 (http://ngk.carshopinc.com/product_info.php/products_id/40948/TR55)


http://www.texas-speed.com/shop/item.asp?itemid=233&catid=11 (http://www.texas-speed.com/shop/item.asp?itemid=233&catid=11)

Like I said, $2 bucks ea.

Platinum catalyzes Ethanol into a compound which is more prone to detonation at combustion chamber temperatures. Since some gas is Ethanol blended, this causes problems.

I havent run Iridium but have run plat 4's, delcos OEM, 2 others I cant remember . I know and have read the jargon. Im going by dyno results and the butt o meter, that tells the tale.I gap em bet .045-.050

Run a set of TR6 or Tr55's and I guarranty you will see snappier throttle response and a smoother Idle. Most guys with Vetts and Camaro's run the TR's . Everyones experiance is a bit different. For $2 buck a piece, anything else is throwing away your money, even if you change a few sets.

DILLIGAF
04-20-06, 09:41 PM
http://ngk.carshopinc.com/product_info.php/products_id/40948/TR55 (http://ngk.carshopinc.com/product_info.php/products_id/40948/TR55)


http://www.texas-speed.com/shop/item.asp?itemid=233&catid=11 (http://www.texas-speed.com/shop/item.asp?itemid=233&catid=11)

Like I said, $2 bucks ea.

Platinum catalyzes Ethanol into a compound which is more prone to detonation at combustion chamber temperatures. Since some gas is Ethanol blended, this causes problems.

I havent run Iridium but have run plat 4's, delcos OEM, 2 others I cant remember . I know and have read the jargon. Im going by dyno results and the butt o meter, that tells the tale.I gap em bet .045-.050

Run a set of TR6 or Tr55's and I guarranty you will see snappier throttle response and a smoother Idle. Most guys with Vetts and Camaro's run the TR's . Everyones experiance is a bit different. For $2 buck a piece, anything else is throwing away your money, even if you change a few sets.More good advice from laasts,maaaaaaaan,now I have to change my wires too,you could of left that part out.My plugs are bad,still with stockers 16,000 maggied miles,damn i'm lazy.

lasstss
04-20-06, 10:18 PM
More good advice from laasts,maaaaaaaan,now I have to change my wires too,you could of left that part out.My plugs are bad,still with stockers 16,000 maggied miles,damn i'm lazy.

Tip of the day! Pull the coil packs and the plugs are way easy to remove.:thumbsup:

DILLIGAF
04-20-06, 10:23 PM
Tip of the day! Pull the coil packs and the plugs are way easy to remove.:thumbsup:Keep them coming,I need to put my headers on soon so I will do it all at once.I have everything I need except the plug wires thanks to you.:alchi: I gotta get this done soon i'm getting bored with the car again.

AmesCTS-V
04-20-06, 11:03 PM
The GTO guys get into this discussion every couple of months. TR55's and Denso's usually seem to be in the majority.

I've tried everything and like Taylor wires with Denso's the best, it's also a very expensive route. MSD wires and TR55's are second, but for the price are hard to beat.

Oh yeah and wear gloves when changing them.

VELOSE
04-21-06, 12:50 AM
I'm going to check what kind of Iridium Denso plugs I have. I had bought them for my Toyota Sequoia almost a year ago. I sold the SUV and have had them laying around in the garage. I hope they fit my V. I'll post up the model and such tomorrow.