Is spark plug indexing a meme? I kinda want to try it on my turd

This makes a lot of sense, huh.

>>16098911
The only meme here are two valves per cylinder.

Is this necessary on 4 valve per cylinder engines?

For what - 2 hp at best?

You'd be better served with iridium plugs. The longer lifespan will allow you to focus on other, more important things like getting to work on time and getting laid.

>>16099002
Not gonna make it to work on time with a slow car...

>>16099002
2HP is a nice fucking gain for literally 5 minutes of work, and $free.99

>>16098971
This is done because of spark positioning, if your plug is at the centre it won't matter.
How is this done though? Is it using washers?

>>16099002
>For what - 2 hp at best?
not even. just an immeasurably small fuel economy gain / less un-burnt fuel in your exhaust

>>16099002
>2 hp at best?
Not even close. Try no power. It's a spergmod. If you've worked on racing engines or high strung high output motorcycle engines you'll see that they don't bother with that shit. Why? It's pointless.

>>16098911
It won't change anything, and if you use spacers it will make it worse.

File: 1476020451722.jpg (2KB, 122x125px) Image search: [Google]

2KB, 122x125px

>>16099002
>iridium

>>16098911
It matters a lot for DI gasoline engines.
On a highly strung race engine ot may give some benefit.
On your shit box it makes no difference.

>>16099002
Pro tip, iridium/platinum tipped plugs don't give as nice a spark as regular ones.

>>16101231
>It matters a lot for DI gasoline engines.
>On a highly strung race engine ot may give some benefit.
No it doesn't.

The don't do this on race engines, and you won't see it on any factory engines.