F355 which spark plug - Ferrari Life
 
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post #1 of 15 Old 04-07-2015, 04:06 PM Thread Starter
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which spark plug

Which is the best spark plug to use for a 5.2 F355 that is only street driven (albeit spiritedly)

There is conflicting information all over including the owners manual.

Choices seem to be NGK PMR7A, PMR8A, or PMR8B

Anyone have definitive information?
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post #2 of 15 Old 04-07-2015, 04:59 PM
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Quote:
Originally Posted by badabing View Post
Which is the best spark plug to use for a 5.2 F355 that is only street driven (albeit spiritedly)

There is conflicting information all over including the owners manual.

Choices seem to be NGK PMR7A, PMR8A, or PMR8B

Anyone have definitive information?
Let me check what was in my 95 when I get home as they were like new.
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post #3 of 15 Old 04-07-2015, 05:06 PM
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post #4 of 15 Old 04-07-2015, 06:48 PM Thread Starter
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Dave,

Thanks for that. I certainly don't want to perpetuate the confusion but I actually read a thread where someone was quoting Daniel as saying PMR8A himself.

I noticed in a Bradan thread he used PMR7A as you've posted. I will go with those. Thanks.
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post #5 of 15 Old 04-08-2015, 06:03 AM
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Hi Neil,

Rather than looking at the plugs from my 95 which I might not trust, here is a page from when my 98 had a major at Algar (who I trust for sure). PMR7A
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post #6 of 15 Old 04-08-2015, 06:47 AM
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On 1995 cars, PMR8B. On 96+, PMR7A is what we spec.


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post #7 of 15 Old 04-08-2015, 06:51 AM
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Originally Posted by Jack Russell Racing View Post
On 1995 cars, PMR8B. On 96+, PMR7A is what we spec.
Daniel, it might be a good idea to update your site as it currently shows the same for 95-99 355's.
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post #8 of 15 Old 04-08-2015, 06:58 AM
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I'll get right on it.


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post #9 of 15 Old 04-08-2015, 07:05 AM
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I'll get right on it.

Wow - you weren't kidding. Already done
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post #10 of 15 Old 04-08-2015, 08:01 AM
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post #11 of 15 Old 04-08-2015, 09:11 AM Thread Starter
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Thanks guys for the info and the tips. I am confident in my choice now.

I recently changed my plug wires and my gaskets are in good shape.

I also didnt find I needed any special tool to to remove the plug wires. I just popped them out by hand.
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post #12 of 15 Old 04-08-2015, 09:29 AM
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Originally Posted by badabing View Post
Thanks guys for the info and the tips. I am confident in my choice now.

I recently changed my plug wires and my gaskets are in good shape.

I also didnt find I needed any special tool to to remove the plug wires. I just popped them out by hand.

I don't know how you did it Neil.....

On my 95 I pulled one wire out of the boot

then, I got smart and used two wire ties wrapped around the underside of the boot as a handle (that sucked, but worked).

Those suckers were on really tight. I guess I'm just a sucker for tools
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post #13 of 15 Old 04-08-2015, 12:07 PM Thread Starter
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I was surprised how easily they came out considering what I had read prior. Maybe they weren't on correctly to start with.
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post #14 of 15 Old 04-08-2015, 12:09 PM
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Originally Posted by badabing View Post
I was surprised how easily they came out considering what I had read prior. Maybe they weren't on correctly to start with.

Very possible. Let me know if you want to borrow my tool.
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post #15 of 15 Old 04-09-2015, 03:22 PM Thread Starter
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That's very generous. Thanks
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