http://www.knightdalez.com/300zx-hesitation/

Thanks to Damo j for putting this website up intresting video on spark plugs is it true NGK sparkplugs are the only plugs you should fit? I have them fitted but I know other members have different plugs with no issues, what do you think zedders?

Apperently the NGKs we use were created for the VG30 engine, other plugs have different reaches, i.e. they sit too far into the cylinder or not far enough, but someone else will be here add to that.....

http://www.leadleader.com/cars/wagz/plugs.jpg

Apperently the NGKs we use were created for the VG30 engine, other plugs have different reaches, i.e. they sit too far into the cylinder or not far enough, but someone else will be here add to that.....

 

understand were your coming from Tuder so all other plugs are not to be fitted

Not sure about that mate, but from what i've heard, you should only use the NGKs....

I agree but would like to hear from members with none ngk fitted

I`ve got the NGK`S Gaz, I personally think you should use them too, they are designed for our engine, but wait for some more responses as i could be wrong!!

 

Daz.

Denso Iridium - IK22 in my car with no problems so far.

NGK designed the OEM plugs specifically for the VG30DETT engine, the non turbo uses a less precise spec which is fitted to a number of other vehicles.

If your car is standard then best to stick with the NGK original spec, PFR6B-11C, mild tuning = PFR6B-11B - not available from NGK UK and no longer in production as far as I'm aware.

If you have notable mods then an aftermarket plug is the only way to keep the plug tip temperature within limits, you may lose a little efficiency at idle/low speed but better that than putting a hole in a piston.

IK22 should be fine for higher boost but won't last an awfully long time. NGK BKR7EIX are equivalent, should last a bit longer but the trade off is slightly less performance. These have a smaller preset gap which you will need if you run a lot of boost, the standard plugs will most likely misfire under high loads and high boost. Best balance of performance and service life for modified cars should be Denso VK22 (Iridium tough) the trade off being cost.

Major mods would need a colder heat range and preferably a race plug to minimise the risk of engine damage through plugs self destructing.

Cheers

H