Petrol octane for a 99 NB

Engines, Transmissions & Final Drive questions and answers

Moderators: timk, Stu, -alex, miata, StanTheMan, greenMachine, ManiacLachy, Daffy, zombie, Andrew, The American, Lokiel

Post Reply
User avatar
jules
Guitar Hero
Posts: 3562
Joined: Thu Apr 24, 2003 11:00 am
Vehicle: NA6
Location: Sydney, previously HQ - GC Dodgy Inc.
Contact:
Contact jules

Postby jules » Thu Nov 02, 2006 1:58 pm

I advanced my timing to 14 degrees and it induced pinging under load. I have used Premium 98 for 4 years now and the car does not ping at all.

I would try using Premium, and see if it still pings. If it doesn't, then I would warm the car up first and then wring the life out of it for a few km's somewhere safe. Next time you fill up then go back to regular and see if it is still pinging.

All this advice is making the assumption that the timing is set at factory spec of 10 degrees.

Jules
Founder of the Gold Coast Chapter of the Honourable Brothers of Dodgy.
Image
Top
User avatar
Garry
Speed Racer
Posts: 3481
Joined: Sun Apr 27, 2003 11:00 am
Vehicle: NB SP
Location: God's Country
Contact:
Contact Garry

Postby Garry » Thu Nov 02, 2006 2:03 pm

You could try changing to a cooler spark plug. It may have the wrong ones fitted or just need a cooler plug for your operating conditions.
Shiney black one with added red bits. Member of the fart club. Now with extra doof and Sunlong. - deceased and gone to heaven
Top
User avatar
AJ
Speed Racer
Posts: 4349
Joined: Sun Oct 30, 2005 8:27 pm
Vehicle: NC
Location: Gold Coast

Postby AJ » Thu Nov 02, 2006 5:22 pm

i'd go for OEM spec ones as a starting point........... :)
Image
Don't worry about what people think, they don't do it very often
XMX5 Rogues
Top
User avatar
JBT
Speed Racer
Posts: 7946
Joined: Tue Jun 03, 2003 11:00 am
Vehicle: NC
Location: Brisbane

Postby JBT » Thu Nov 02, 2006 5:32 pm

From the NGK website http://www.ngkspark.com.au/ Check out the FAQs about fouling, overheating and temp range.

Your Vehicle:
01/98 - on Mazda MX5 1.8L DOHC NB8C
Spark Plug Part No.
Recommended Plug BKR5E-11
Plug Gap 1.1 mm
Image
Top
Post Reply

Return to “MX5 Engines, Transmission & Final Drive”

Who is online

Users browsing this forum: No registered users and 3 guests