Fiesta ST Spark plug tech

[Turbo65]

What’s the general consensus on NGK plugs, I’m going to buy some pre gapped from Ron and I wondering what to do. Car is Randy tuned on a stock turbo

 

[ron@whoosh]

What’s the general consensus on NGK plugs, I’m going to buy some pre gapped from Ron and I wondering what to do. Car is Randy tuned on a stock turbo

he will most likely suggest stock heat range, gapped .025-.026
I can't speak for him obviously but this is exactly what he just suggested to others recently

 

[Turbo65]

he will most likely suggest stock heat range, gapped .025-.026
I can't speak for him obviously but this is exactly what he just suggested to others recently

Thanks Ron,

 

[alexrex20]

I am just stage 2 on E30 and run the one step colder. Stratified is my tune and they recommend one step colder on any tuned FiST. the colder plug is a little insurance against detonation since most tunes are looking for 25-26psi.

 

[M-Sport fan]

Yes the NGKs take about .25sec longer to start the car sometimes.

Is this with BOTH being the SAME stock/factory heat range, or different ranges each, (since that could have as much effect as the BRAND )?

 

[M-Sport fan]

I am just stage 2 on E30 and run the one step colder. Stratified is my tune and they recommend one step colder on any tuned FiST. the colder plug is a little insurance against detonation since most tunes are looking for 25-26psi.

As long as one does not 'short trip' in very cold ambient temps (which you should not do anyway to keep moisture, washed down fuel dilution of the oil, and the resultant acids from forming in your crankcase), the colder plugs should be OK.
IF you do (short trip in the cold), you could have more of a chance of 'loading up' the combustion chamber with carbon, and washing down the cylinder walls with fuel which then goes into the sump and dilutes, and with the moisture, turns the oil acidic, with the colder plugs

 

[Quisp]

As long as one does not 'short trip' in very cold ambient temps (which you should not do anyway to keep moisture, washed down fuel dilution of the oil, and the resultant acids from forming in your crankcase), the colder plugs should be OK.
IF you do (short trip in the cold), you could have more of a chance of 'loading up' the combustion chamber with carbon, and washing down the cylinder walls with fuel which then goes into the sump and dilutes, and with the moisture, turns the oil acidic, with the colder plugs

The most you will do is foul a plug . One step colder is not going to cause any of that.

 

[M-Sport fan]

^^^OK, but WHO even wants to foul a plug and get misfires?
You have little to worry about since it rarely gets even to freezing temps where you are located.

The best solution for those in very cold climes is to switch back and forth between the two heat ranges twice a year, IF you actually do need the colder plugs at all due to a radical tune and/or turbo upgrade.
But of course NO ONE is going to bother with even thinking about doing that.
(Or just make sure that once you start the car, you then drive it for at least a half hour to 45 minutes, minimum. )

 

[FromChaos79]

.028, sir.

I know im years late on this but you should have been at .026. Regardless of length of plug the gap size is the same

 

[Hijinx]

I know im years late on this but you should have been at .026. Regardless of length of plug the gap size is the same

Thanks! I’ll go back 5 years and let myself know so I don’t have to worry about figuring things out on this car because we know a whole bunch now!

 

[FromChaos79]

Thanks! I’ll go back 5 years and let myself know so I don’t have to worry about figuring things out on this car because we know a whole bunch now!

haha! why i pointed out im years behind. But only reason I guess I mentioned it is, I still see where people are gapping plugs for this car too far out. Im not an expert. I for the longest time didnt think a colder plug would matter. I bought a set of the NGK 6510s yesterday. But happened to be last minute searching things to confirm my purchase. Ive only had mine since '16 and im full bolt on E30 looking for a little extra. Just late to the party is all. Wasnt trying to be a dick my friend

 

[TyphoonFiST]

Next question....which spark plug is the best? NGK 6510 OR Denso 5340?

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[Quisp]

Next question....which spark plug is the best? NGK 6510 OR Denso 5340?

Sent from my SM-N950U1 using Tapatalk

Denso gave me hard starting. NGK'S no problem.

Sent from my SM-J727P using Tapatalk

 

[fiestastdaily]

Next question....which spark plug is the best? NGK 6510 OR Denso 5340?

Sent from my SM-N950U1 using Tapatalk

NGKs all day.

I've had nothing but issues running the densos.
Ngks: consistent across the board.

 

[M-Sport fan]

I have a set of the new 'Ruthenium' (LOL) plugs from NGK for our engine, in the standard heat range (they supposedly make them in 3 heat ranges?), but have not installed them yet.