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Plugs and wires
http://4g61t.org/forum/viewtopic.php?f=6&t=5029		 Page 1 of 1
Author:  m435tro [ Wed Aug 20, 2003 9:05 am ]
Post subject:  Plugs and wires
Could you guys tell me what plug and wire that is decent for 4g61?
Author:  The Ethereal [ Wed Aug 20, 2003 10:19 am ]
Post subject: 
The standard wire will work fo sure. But try Magnecor wires if you want to. I have no experiences with them, though, but everyone recommends them so I guess they're good. :wink: I've heard they cost less than the original wires.

As for spark plugs, I use Beru Ultra-X in my 4G15 and also used them in my now dead 4G67 :cry: . The engine runs a bit better and smoother, but I couldn't notice any difference in mileage or power output. In case you don't know 'em (no one seems to use them here except me), Ultra X plugs have 4 ground electrodes.

BTW, I use them on a NA car. I don't know how they behave on a turbo car.
Author:  Crackerman [ Wed Aug 20, 2003 3:12 pm ]
Post subject: 
ngk bpr7-es

copper core plugs, do not ude a platinum tip plug
Author:  Gage [ Wed Aug 20, 2003 5:08 pm ]
Post subject: 
Denso IRIDIUM :D
Author:  switch [ Wed Aug 20, 2003 7:44 pm ]
Post subject: 
I use bpr6es plugs - and magnecore wires kvr8 ones...

They work fine in my car - with plugs get cheap ones and just change them regularly... wit hte leads - it doesnt seem any different to me - but they supposedly last longer so thats what I bought them for!

What do you guys gap your plugs too?
Author:  xlr8 [ Wed Aug 20, 2003 8:14 pm ]
Post subject: 
Switch, you should be using the BPR7ES as the '6' plug is going to be a little too hot for the turbo motor - especially if you up the boost any amount. BPR6ES is what the non-turbo 4G61s and 4G15s use. I use a 0.7mm gap on my 4G61T.
Author:  switch [ Wed Aug 20, 2003 9:09 pm ]
Post subject: 
Ok - I did use the the bpr73s's for a while but then I changed back...

Next oil change - ill change back to the 7's...

Is 0.7mm gap normal? It seems like a very small gap! I leave them stock at 1.0mm (I think?)

I Run 15psi boost

Mike
Author:  xlr8 [ Thu Aug 21, 2003 12:54 am ]
Post subject: 
0.7-0.8mm is the factory recommended spark plug gap setting for the turbo 4G6x variants. 1.0-1.1mm is the standard for the non-turbo engines.

Chances are you may be getting a small amount of misfire (which may or may not be noticable) at high revs and high boost from the spark event being blown out or otherwise being less than optimal. In any case you should run them at the factory setting.
Author:  switch [ Thu Aug 21, 2003 1:05 am ]
Post subject: 
Thanks for the info - I will rectify it next oil change when ill be changing back to a td04 too :)

Maybe I shouldve RTFM :)
Author:  The Ethereal [ Thu Aug 21, 2003 5:07 am ]
Post subject: 
You will usually notice an increased mileage when changing to the right gap.
Also problems like some light idle surge or a rough running engine will disappear.

The idiot who owned my car before me had plugs w/ 0.7 mm gap (I have a NA car). Changing the gap helped bottom end performance and increased mileage noticeably.

Perhaps you notice the same when setting the gap to 0.7-0.8 mm on your turbo car.
Author:  m435tro [ Thu Aug 21, 2003 8:06 am ]
Post subject: 
what about the wires guys...? :P
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