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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 10-12-2004, 07:38 AM   #1 (permalink)
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Has anyone tried Bosch 4+ on their E36?
Or should I just stick with stock?

Thanks

K
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Old 10-12-2004, 07:53 AM   #2 (permalink)
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Quote:
Originally posted by kvadgama@Oct 12 2004, 06:38 AM
Has anyone tried Bosch 4+ on their E36?
Or should I just stick with stock?

Thanks

K
[snapback]209825[/snapback]

I've been running them for the past %k miles in a 94 325 with 105k. No problems, but no dramatic improvement in performance.
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Old 10-12-2004, 08:09 AM   #3 (permalink)
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Yeah, Stealer gave them to me as stock, $13 a plug. No increase in perf, but no degredation either.

So, save some cash and stay with stock..
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Old 10-12-2004, 09:17 AM   #4 (permalink)
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I use them, there may have been some improvement but definately not enough for me to tell.
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Old 10-12-2004, 09:37 AM   #5 (permalink)
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Yup, no good for the E36 ignition system....{HERE}
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Old 10-12-2004, 10:31 AM   #6 (permalink)
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I agree to the above post... no good...

BMW's Distributorless ignitions spark in both directions... and spark at a lot lower rate than normal ignition systems... Stock is the best way to go... unless you change your ignitions system.

Les
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Old 10-12-2004, 12:46 PM   #7 (permalink)
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I've tried both +2's and +4's, I've been getting misfires and hesistation on acceleration. I switched back to the OEM dual electrode copper NGK plugs and now my car runs great! BMW's don't like Platinum plugs.
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Old 10-12-2004, 01:53 PM   #8 (permalink)
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yeah i heard the same damn thing from my bmw mechanic. he said to get bosch supers.
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Old 10-12-2004, 01:54 PM   #9 (permalink)
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oh yeah and sure as hell are a waste of money. go with ngk or bosch supers.
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Old 10-13-2004, 12:25 AM   #10 (permalink)
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Originally posted by jllphan@Oct 12 2004, 07:37 AM
Yup, no good for the E36 ignition system....{HERE}
[snapback]209853[/snapback]
I have the bosch +4's....when you say no good for the ignition system...does that mean that they will harm the ignition system or you just won't get the maximum performance?
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Old 10-13-2004, 12:27 AM   #11 (permalink)
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do a search on the forums about those plugs and youll get plenty of feedback. mostly negative
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Old 10-13-2004, 12:31 AM   #12 (permalink)
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Originally posted by Furious@Oct 12 2004, 10:27 PM
do a search on the forums about those plugs and youll get plenty of feedback. mostly negative
[snapback]210326[/snapback]
Well I mean...I'm pretty much sold on the fact that they aren't good but I have had them on my car for about 200 miles...just wondering if I could have sustained any ignition damage in that amount of time from the platinums.
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Old 10-13-2004, 12:39 AM   #13 (permalink)
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no i dont think so, even running them for an intire life of the plug, will probably not cause any fatal damage.. most of the negativity stems from the fact that they actually perform like crap.
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Old 10-13-2004, 10:47 PM   #14 (permalink)
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Do I need the F8LDCR or the F7LDCR bosch supers?
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Old 10-14-2004, 10:39 AM   #15 (permalink)
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Quote:
Originally posted by jllphan@Oct 12 2004, 08:37 AM
Yup, no good for the E36 ignition system....{HERE}
[snapback]209853[/snapback]
Ah it is good to be back... Ok so about 400 miles ago i put plus 4's in my car... And guess whgatg.. it runs fine. I dont feel a difference one way or the other, but then again the old plugs had only 10K or so on them. I am not trying to be difficult or anything but I have ready your posts regarding these, and you say you have done the research, but I dont see any research cited, only the word of your mater technicain, who by the way can become certified as a master technician by passing competancy tests, which in no way mandate knowledge of spark plug design or even ignition design. Igniton theory and function yes.. design parameters not so. I have done some poking around and looked at a lot of posts from a lot fo folks and here is my final opinion:

I dont buy the low energy ignition argument as i have done a simple resistance test of both plugs and there is nearly no difference. The whole 4 electrode thing is partially marketing gimick, in that electricity takes the path of least resistance, and as such it will form a SINGLE spark between the center elctrode and ONE of the side electrodes. As to which one... I think that will vary through the life of the plug, and through the start and run cycle of the engine based on one elctrode wearing and small carbon build up etc.

The plus 4's are no better or worse in general .. some cars seem to perform poorly with them, but without having actually checked said cars myself I am not willing to blame the plug before I know if the injectors are leaking or clogged, or something else is just being brought to the forefront by a better spark. I beleive they people should not use them but for the following reason.

1-- found no difference on an insanley well maintained car. so they are not likely to be worth the extra money

2-- if you you use regular plugs, you now have a reason to take a look at your engine every 10-15K and determine if your valve cover gaskets are leaking, your ground wires are good etc. Changing plugs is less thahn an hour no matter which engine you have, so it is time well spent.
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