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Club G40 Forum

Technical => Engine and Transmission => Topic started by: g40josh on June 28, 2015, 03:23:07 PM

Title: Spark plugs
Post by: g40josh on June 28, 2015, 03:23:07 PM
Could anyone help me out,  I am trying to find out which cold spark plugs to run any help appreciated. Cheers
Title: Re: Spark plugs
Post by: Etches on June 28, 2015, 03:48:11 PM
Search for Spark plugs with the forum search engine, plenty of topics up there to help you out .
Title: Re: Spark plugs
Post by: g40josh on June 29, 2015, 07:19:40 PM
Cheers mate. I had a little look just didn't know which ones to go for
Title: Re: Spark plugs
Post by: Etches on June 29, 2015, 10:16:35 PM
The bosh ones are the best really. I've melted 2 sets of NGKs
Title: Re: Spark plugs
Post by: Andy on June 30, 2015, 07:01:56 AM
Which NGKs are you using Tom?

Plenty of us running high boost with NGKs and no issues - and some guys with nitrous on top.
Title: Re: Spark plugs
Post by: Yoof on June 30, 2015, 07:04:17 AM
Quote from: Etches on June 29, 2015, 10:16:35 PM
The bosh ones are the best really. I've melted 2 sets of NGKs

Something is wrong then Tom - The NGK are a solid plug (BP8EVX, now I believe BPR8EVIX)

When running gas I melted two W4DPO, but the NGK have been fine.

I would say most plugs purchased from eBay really need checking properly to make sure they've not sustained damage whilst in transit.
Title: Re: Spark plugs
Post by: hayesey on June 30, 2015, 04:43:34 PM
I've been using the NGK ones (BP8EVX and BPR8EVIX now) for years without issues.  Never had any issues before that with W5DP0s either but was running much less boost in them days.
Title: Re: Spark plugs
Post by: RyanC on June 30, 2015, 09:47:56 PM
I've got NGK BPR7EIX which cross refers to Bosch W5DP0 and W4DP0 so thats why I went for them. Also what is recommended in earlier posts..
The BPR8EIX plugs only cross refer to a W4DP0.

Whats the difference between the BPR7EIX and BPR8EIX? I cant seem to find any..
Title: Re: Spark plugs
Post by: Andy on June 30, 2015, 09:53:35 PM
The 8s are a colder/harder plug, so more suited if you're running really high boost and/or nitrous. I've used 7s in mine.
Title: Re: Spark plugs
Post by: Jezza-7 on June 30, 2015, 10:40:48 PM
Im currently running 7's on mine, but when i play with the nitrous will it be better to have the 8's?
Title: Re: Spark plugs
Post by: RyanC on June 30, 2015, 10:57:30 PM
I'm aiming on running just over 200 with a ko3, so I hope 7s will be okay
Title: Re: Spark plugs
Post by: Etches on June 30, 2015, 11:48:24 PM
I used bp8evx when I melted a piston, then an new set when I pinked loads then popped the head gasket. Turned out than there were practically no points left on the brand new plugs!
Title: Re: Spark plugs
Post by: Andy on July 01, 2015, 07:05:51 AM
If your engine is detting its arse off it's no wonder you melted plugs! If it's getting hot enough to melt pistons or HGs, then the plugs don't have much of a chance either.
Title: Re: Spark plugs
Post by: Jacque on July 02, 2015, 02:55:39 PM
for who is looking for W5DPO, they are out of stock untill 2016...

I went for NGK, BPR7EIX's. only did 300 miles but no probs so far..  not running high boost so will be fine i guess.
Title: Re: Spark plugs
Post by: xandyx on July 02, 2015, 07:44:28 PM
But aren't the bpr's resistor plugs?

Don't distributor have a resistor allready?!
Title: Re: Spark plugs
Post by: hayesey on July 06, 2015, 09:25:51 AM
well, you can't actually buy w5dp0 anymore, they were replaced with something like wr5dp0 a few years ago.  They are also a resistor plug.  Same goes for the NGK ones, they discontinued the non-resistor ones.  They still work fine, yes there is a suppression resistor in the rotor arm already but it doesn't cause any problems.
Title: Re: Spark plugs
Post by: Adampolog40 on July 07, 2015, 03:20:54 PM
Got a brand new set of W5DP0 plugs for sale if anyone's interested.  And bar-tek seem to be still selling these €89 maybe they are just selling what they have left in stock I don't know.
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