Just had a remap on my 1997 uk turbo with JGM with an apexi ecu, just wondering if it is okay to change spark plugs, if it would affect the map, also there is a slight tapping noise, sometimes from the engine, knock sensor is not reading near the dangerous number, if that makes sense, and it's just a tapping noise?

Also, what number spark plugs?


Thanks, David

 

If you are running more boost you could try NGK PFR7's gapped to 0.65mm. You can use the 6's but the 7's run a little cooler. It will not affect the mapping in any way. As for tapping can you track it down to a certain area?

 

Hi, not really sure where it's coming from, I will try and find out,

the boost has been set to 1.2 bar peak.

With regards to the plugs, which ones are better? Would I need to change
leads or just plugs?

Thanks

David

 

You only need to change the plugs. There isn't really a better plug, the 6's are used for standard set ups and slightly modded. The 7's are used for the next stage up. However, just to confuse things, some are still using the 6's and running 300+bhp on them. Personally I use the 7's and I'm running 281bhp on a MY99.

 

I see that I'm telling the truth again about the plugs!! lol

 

I never doubt you Andy!

Apparently that tapping noise is the injectors, but it's probably just them letting more fuel through.


Just wondering, what injectors should I have, 330s or 380s? MY 97 uk turbo.

Thanks

 

You wouldn't go far wrong with my 440's you know

 

does any1 know if the 7s plugs are preset gap as i never had any gauges to check an just shoved them in. remap in 2 weeks

 

I'm pretty sure the 7's are set at 0.7 as I just gave mine a little tap to get them right.

 

I very recently fitted 7's to mine and checked the gaps - they were all pre-set to 0.7mm so you should be fine I reckon

 

yea .65 to 0.7 i dont think u can c that difference exceppt gauges can tell. mine runs dead smooth so will keep it at that

 

I know but would need it mapped again. Are mine 380s standard?