Spark plugs

[Thumper]

What plugs are you using?
I have been fighting a flat spot on part throttle since putting on my XXX. Ended up with .295 Int, 78 main and 50 bleed but the real fix was a switch to Autolite 4160 plugs. These were suggested by a local tuner and Wham fixed it right up. ?????

 

[sul]

autolite 4164

think they're a step cooler. i gap at .036 cause i'm running higher compression.

you ever hear of indexing?

 

[Thumper]

autolite 4164

think they're a step cooler. i gap at .036 cause i'm running higher compression.

you ever hear of indexing?

Yes, we do to that on our race cars. I dont know how much of a factor that really is on stock compression and ignition.

 

[Wildthing]

What is the stock gap?
.40?

 

[chacha]

Wildthing;

Yep, stock gap is .40

 

[Raywood]

I use Denso Iridium plugs (IXU22) with Nology plug wires. Both have worked great for a lot of miles.

http://www.clubplug.net/
http://www.nology.com/home.html

Later,
Ray

 

[Raywood]

What plugs are you using?
I have been fighting a flat spot on part throttle since putting on my XXX. Ended up with .295 Int, 78 main and 50 bleed but the real fix was a switch to Autolite 4160 plugs. These were suggested by a local tuner and Wham fixed it right up. ?????

Thumper, where is your accelerator pump set at. At what rpm is your flat spot experienced at? It may be that you have to large of a main jet. I use a 29.5 and a 72 on my xXx. A large main jet will give you the same symptoms at about 2000 rpm.

Later,
Ray

 

[Thumper]

Thumper, where is your accelerator pump set at. At what rpm is your flat spot experienced at? It may be that you have to large of a main jet. I use a 29.5 and a 72 on my xXx. A large main jet will give you the same symptoms at about 2000 rpm.

Later,
Ray

1.75 turns out on the pump, 1500-2000 is the spot. Are we in the main circuit at the RPM?

 

[Raywood]

Yep. If you have some jets laying around (I keep a whole bag of them) then try dropping it to a 74 and see how it runs. I'll bet you'll see some improvement. Won't hurt to try and it's easy to change.
Later,
Ray

 

[Wildthing]

It's hard to find those plugs.
I've looked locally

 

[LDO]

I use Denso Iridium plugs (IXU22) with Nology plug wires. Both have worked great for a lot of miles.

http://www.clubplug.net/
http://www.nology.com/home.html

Later,
Ray

High $$$$ stuff there Ray. Must be nice to be a retired rich guy!

 

[Slow Vince]

I use Denso Iridium plugs (IXU22) with Nology plug wires.
http://www.clubplug.net/
http://www.nology.com/home.html

Have you ever tried the Silver plugs (from the Nology site)?

 

[Gas Man]

I use to run idirdium plugs in my rocket... 147hp at the rear wheel... they worked great... but a whole different beast than these bikes.

 

[Raywood]

Have you ever tried the Silver plugs (from the Nology site)?

No, I haven't. I like there wires with the grounds though. I used to live about 2 miles from there store when I lived in Kalifornia.

 

[pisssed]

I know there IMPORTS but NGK here

 

[Gas Man]

I was working on a AIH Legend last night and he had auto lites in it. And they weren't the standard 5/8" socket either... stupid... I told him we need to put some champions in it... F that shit..

 

[Slow Vince]

OK... Was asking, because the Nology web site has some pretty strong words about Iridium...

 

[F_HEAD]

I use Denso Iridium plugs (IXU22) with Nology plug wires. Both have worked great for a lot of miles.

http://www.clubplug.net/
http://www.nology.com/home.html

Later,
Ray

Why did you chose that combo?

 

[F_HEAD]

This is what the nology website says about the Iridium plugs.



Iridium is a super dense material and therefore extremely resistant to wear. That's it!
It is a terrible thermal conductor and a bad electrical conductor, so why would anyone use it to make a spark plug center electrode? Since car manufacturers have to guaranty that their engines stay in-tune for up to 100,000 miles, they can only achieve this with ultra dense Iridium or Platinum.

 

[Raywood]

Iridium is a super dense material and therefore extremely resistant to wear. That's it!
It is a terrible thermal conductor and a bad electrical conductor, so why would anyone use it to make a spark plug center electrode? Since car manufacturers have to guaranty that their engines stay in-tune for up to 100,000 miles, they can only achieve this with ultra dense Iridium or Platinum.

Just marketing! Go to Champion, NGK, Autolite and all the others and they stoke themselves also! A spark plug is a spark plug, use whatever floats your bubble.