which spark plugs with stage3

[antoanS4]

Hi guys,this is the second time in les than 3 months that i have to replace the spark plugs, i most of the time run on race gas 110 on my stage3, i burn a brand new set of the same factory NGK that came with the car,the other ones where the iridium 2 step colder NGK and rigth now i need to change them and i dont know what to get

[MacDaddy]

can you post some pics of the plugs? gotta "read" them to see whats happening.

[MAKK]

You might need cooler plugs, so just post a pic like stated above.

[Matt@JHM]

We have had VERY good luck with our Bosch Platinum Sidefire plugs.

These Bosch Platinum Side Fire Plugs are 1 range colder than stock, are long lasting and pre gapped to not missfire with high boost.



Yes, they are not cheap but they have lasted use a very long time thus far.

http://www.jhmotorsports.com/shop/ca...products_id=82

[andream88]

In italy those spark plugs cost 29€/each (40$)!

[antoanS4]

Ill take pics tomorrow, but thats how they usually start going bad with a missfire after more than 4500 rpm

[antoanS4]

no one uses NGK

[rcjustin]

We have had VERY good luck with our Bosch Platinum Sidefire plugs.

These Bosch Platinum Side Fire Plugs are 1 range colder than stock, are long lasting and pre gapped to not missfire with high boost.



Yes, they are not cheap but they have lasted use a very long time thus far.

http://www.jhmotorsports.com/shop/ca...products_id=82

Second that, those pluga have worked great for me. Had the same problems as you with the ngk's

[NogaroWonda00]

I blew threw my NGK in about a week after going stage III......I am using RS6 plugs now , but anyways its been about 2500 miles after i replaced them and they are working great, I may be wrong but I do not recall them being too expensive either.

[MacDaddy]

no one uses NGK

I do, and the OEM plugs i took out of my car were NGK too.

I've Never had a single problem with an NGK plug, can't say the same for Bosch.

[antoanS4]

hey matt or justin on those bosch spark do you need to something aboutn the gab

[Daft]

We have had VERY good luck with our Bosch Platinum Sidefire plugs.

These Bosch Platinum Side Fire Plugs are 1 range colder than stock, are long lasting and pre gapped to not missfire with high boost.

Actually, they are 2 heat ranges cooler.

Bosch and NGK have different heat range scales.

Our stock plugs were NGK PFR6Q. A 6 heat range in NGK's scale equates to a 7 in Bosch's.

Therefore, an equivalent heat range to the OEM spec would be something like an F7DP0R.

The side fire plugs that we are discussing here are model: F5DP0R. 2 heat ranges cooler than the OEM rating of 7 for a Bosch plug.

[Daft]

hey matt or justin on those bosch spark do you need to something aboutn the gab

The gap on those plugs is 0.024" out of the box. I'd imagine that you could change the gap if you wanted to but, it won't be as simple as a conventional copper plug that has the ground electrode hanging under the center electrode.

On the APB motor in the S4, the coil packs are not as powerful and the ones used on the A6 and the allroad. This means that using a larger gap while using the Beru coils in the S4 will be more prone to misifres as Stage 3 boost levels become very turbulent in the combustion chamber. Most spark plug manufacturers recommend to close the plug gap by 0.004" for every 50HP you add via forced induction changes. The stock gap is 0.032".

The 0.024" gap on the Bosch F5DP0R is then reduced 0.008" from the stock 0.032" gap. This should be fine for all around use and not be too small. The only other option you could go with is a nology or crane spark amplifier to raise the spark levels and then keep a larger gap.

The largest change I've ever noticed from smaller gap is a slight reduction in low rpm throttle response. Larger gaps tend to result in snappier throttle response at lower rpms.

The tradeoff in using a smaller gap is the avoidance of misfires during WOT applications up near redline. Obviously, you don't want misfires up there so the tradeoff in throttle response in those lower rpm areas is worth it.

[Daft]

no one uses NGK

I'm currently running the NGK BKR8E-IX plugs. They are irridium plugs that are two heat ranges cooler than stock. The reason I tried them out was because they were $65 for 6 plugs. I figured I try them to see how they behaved under the Stage 3 conditions.

So far, they are working very well. They result in 100% misfire free operation at 21-22Psi boost levels. The irridium core will last longer than platinum will and the cost was less.

The only way for me to make a true comparrison is to buy another set of the F5DP0R plugs are run them back-to-back with the NGK Irridiums and see what my timing, EGT and AFR logs look like with them.

I have a sneaking suspicion that the Bosch plugs will still make a tad more power due to the side fire design and the center electrode shaping.

[Das General]

Bosch Plat

[BastardS4]

I'm currently running the NGK BKR8E-IX plugs. They are irridium plugs that are two heat ranges cooler than stock. The reason I tried them out was because they were $65 for 6 plugs. I figured I try them to see how they behaved under the Stage 3 conditions.

So far, they are working very well. They result in 100% misfire free operation at 21-22Psi boost levels. The irridium core will last longer than platinum will and the cost was less.
.

Im running the same, gapped to .026

[Daft]

Im running the same, gapped to .026

You set them to 0.026"? I checked mine and they were set to that right out of the box.

[BastardS4]

You set them to 0.026"? I checked mine and they were set to that right out of the box.

dude, not even close. more like .032

[Daft]

dude, not even close. more like .032

Very odd. Mine were all 0.026" on the dot, I kid you not.

[NogaroWonda00]

http://www.vividracing.com/catalog/d...r-p-29015.html

[antoanS4]

are you using this Denso, are you stage3

[NogaroWonda00]

im using the bosch RS6 plugs, they both are one step colder and yes im stage 3. they are working great. if you do some looking on the net im sure you could find the bosch ones if you want. I went through carquest and they had them the next day, they should be 12-13$ a piece

[antoanS4]

do you run with race gas as well

[Daft]

im using the bosch RS6 plugs, they both are one step colder and yes im stage 3. they are working great. if you do some looking on the net im sure you could find the bosch ones if you want. I went through carquest and they had them the next day, they should be 12-13$ a piece

What plugs are you referring to as the "bosch RS6 plugs"?

The stock plug in the RS6 was the NGK PFR7Q. It is the same plug as the stock 2.7T plug just one heat range cooler.

The Bosch equivalent plug is the FR6DPP22.

The stock Bosch plug for the S4 2.7T is a FR7DPP33.

[highPSI-S4]

I have the same Denso plugs, although i'm not stage 3. They seem to run fine so far.

[NogaroWonda00]

I am using the bosch equivilant, No race gas, but I think it should work, I talked to a shop when i put mine in after the NGK were done, they said thats way more then necessary..

are the plugs that AWE sends with their kit one step colder or exactly stock spec?

[Rated S]

I use the Bosch Platinum SideFires (2 colder) on my Stage 3 and they work wonderfully.

[Splinter]

I am using the bosch equivilant, No race gas, but I think it should work, I talked to a shop when i put mine in after the NGK were done, they said thats way more then necessary..

are the plugs that AWE sends with their kit one step colder or exactly stock spec?

AWE uses NGK PFR6Q

[antoanS4]

whats the reference # on the sidefire 2 colder

[antoanS4]

or maybe i need better coil packs i have the stock late 2000 model

[Daft]

whats the reference # on the sidefire 2 colder

The sidefire plugs are model F5DP0R. Bosch Article number: 0241245641

[SoSlow]

AWE uses NGK PFR6Q

that is stock

you can also use copper plugs, ngk BKR6E, works exactly the same as stock but needs to be changed every 5k miles.

[Reich]

You set them to 0.026"? I checked mine and they were set to that right out of the box.

DAFF I remember someone saying to not gap irridium spark plugs or will shorten there life b/c that would remove that irridium coating on them. Is that true?

[Daft]

DAFT I remember someone saying to not gap irridium spark plugs or will shorten there life b/c that would remove that irridium coating on them. Is that true?

You can gap them, you just need to be gentle.

Here's a quote from NGK's FAQ page:

If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. The gap should be adjusted by only moving the ground electrode.

[Reich]

You can gap them, you just need to be gentle.

Here's a quote from NGK's FAQ page:

nice info thank's a lot.

[jutny]

So, can we use the coilpacks from the a6 or allroad? i dont see why it wouldnt be a plug and play thing.

[SoEvoL]

im using stock cp's and ngk bkr6e plugs, i dont have any problems on my setup, no misfire issues. changing the plugs takes minutes and costs me very little.

[Daft]

So, can we use the coilpacks from the a6 or allroad? i dont see why it wouldnt be a plug and play thing.

The Beru and Bremi coils are not interchangable.

The Beru coils on the S4 require the use of the ICM units to amplify the spark before it arrives at the plug.

The Bremi coils on the A6 and allroad have the ICM components built-in to make things simpler.

You would need to cut out the ICMs and the Beru harnesses and rewire everything to use the Bremi coils.

Jeff Lee did this on a B5 A4 1.8T a while back. It would be 50% of the job on an S4:

Here.

**Note: He used the Hitachi coils that are usually found on the B6 A4 (Rev. E), not the Bremi coils from an A6/allroad.**

[rageman2]

I think it should be noted that the LATER A6s and allroads with the engine code BEL run the updated ignition system - my MY 2000 A6 has an APB engine and I have ICMs. I can't say for certain if the coilpacks are the same, but I suspect they would be.