Quote:
Originally Posted by craggle  No, Haven't checked the timing yet but will give it a go at the weekend.
I am thinking of changing my spark plugs as I have had previous problems with Champion spark plugs in my Range Rover.
I found the NGK equivalent to the ones I have fitted but I have read about different temperature plugs?
Any good recommendations for a 350 running 10:1 CR and Edelbrock aluminium heads?
Craig. |
Heat range 5 or 6 no more unless you are on the circuit. I would actually opt for 5 for road use as 6 can foul with intermittent use although it is classed as Ok
I have attached the table for NGK choice which makes it simple
NGK spark plugs symbol code
eg if you were to choose iridium then it would be a BPR-5EIX depending on if you are using a capacitive discharge or other you may want a plug with a larger gap so that the electrode and groung remain as near parallel as possible. In that case you would use a BPR-5EIX-11.
Just choose the type of nose you require depending on what you want to spend and use the relevent symbols in the latter part of the plug type. If you want to check if you have got it right just post.
Just a last comment - a common thing is for owners to look at tables that give compression, head type, compression ratio etc. This can lead you to a heat range around 7 quite easily. The reality is that if the car is not being driven hard all the time, this can lead to fouling on a cold plug. Better to get the 5 or 6. If I were a betting man the 5 would be the one for road use.
Hope this helps
Mike