Acura Legend Forum banner
1 - 14 of 14 Posts

·
Registered
Joined
·
20 Posts
Discussion Starter · #1 · (Edited)
Anyone using Bosch +4's? Was wondering if they really helped at all...

they are 4 prong spark plugs for anyone wondering
 

·
Registered
Joined
·
2,430 Posts
I haven't really heard all that many great things about the Bosch +4's in Acuras. I use Muhan No Gap Spark Plugs (2nd Generation prototype). This plugs are nice. gives off 3 huge sparks and no side electrode to get in the way. Maybe I can get a Group Buy going for these??? Obviously when the 2nd Gen's are good and done, but these spark plugs are nice. I've noticed throttle responce is much better with the no gaps. But then, anyway, I don't think the +4's would really yeld anything in the way of more performance vs. NGK or Denso.
 

·
Registered
Joined
·
703 Posts
I trired them on mine a while ago, I thought I felt a little more power at the time, but it's probably just phychological. I doubt they are any better then regular spark plugs.
 

·
Registered
Joined
·
1,039 Posts
I have them now

Its been more than six months! My car feels great and all but I will go back and test the other regular brand to see the difference. I heard the run the engine HOT!
 

·
Registered
Joined
·
1,634 Posts
Plugs with multiple electrodes are pure BS IMO.

Electricity takes the easiest path to ground. Why would it violate the laws of physics and jump a gap between all four ground electrodes at once?

Just stick with regular old copper core NGK's and you'll be fine.
 

·
Registered
Joined
·
703 Posts
slugman said:
You could use multiple spark plugs. Hehe. With a bit of work of course...
The late 80's 4 cylinder Mustangs used 2 sparkplugs in each cylinder. Supposed to make it get better fuel economy or something. It's the stupidest design I've ever seen.
 

·
Registered
Joined
·
1,590 Posts
Eric F said:

The late 80's 4 cylinder Mustangs used 2 sparkplugs in each cylinder. Supposed to make it get better fuel economy or something. It's the stupidest design I've ever seen.
That's true (about the fuel economy). Mercedes uses this in all its newer engines (starting with the 3.2 V6), and Honda uses it in the new Civic Hybrid.
 

·
Registered
Joined
·
602 Posts
I actually got brand new Bosch platniums and switched them for the copper NGK splitfires. NGKs are designed for imports and are very reasonable in price. I've noticed much smoother idle and more responsive power with these. I think spark plugs are a lot better mod than exhaust or intake. More cost efficient IMO.
That sounds kinda crazy- two spark plugs. Do you get more power that way or just better fuel economy? I would think that since more of the fuel is being exposed, more of it will be burned.
 

·
Registered
Joined
·
1,039 Posts
I have the Bosch 4s and the MPG is 26 highway. I went up since I got the bosch O2 Sensors!!!
 

·
Registered
Joined
·
1,039 Posts
As for the 2 spark plugs in cylinder

I first saw that in an Nissan Stanza If I can recall properly. I 1st thought it was a v8 or something but nope.

If that was the case, More air in the intake would be helpful!
 

·
Registered
Joined
·
36 Posts
bout thoes plugs, for me they are working great, although if your engine isnt in good condition or u got other problems you wont really know the difference but non the less i like em :) they work out good even though they were a bit expensive
 

·
Registered
Joined
·
703 Posts
I'm not completely sure about what the theory is behind 2 spark plugs per cylinder. They don't fire at the same time. I think the extra set of plugs fires when the exhaust valves open to clean out the leftover fuel that the first explosion didn't take care of. I'm not sure on this though, maybe someone else can shed some light on this.
 
1 - 14 of 14 Posts
Top