BPR7ES spark plugs

[AndrewG]

I changed out my plugs today. The previous plugs were BPR7ES plugs I replaced them with BPR6ES plugs. Any idea why it might have had those plugs in previously?

FYI I have only had the car 4 days now.

Here is pick of the plugs that come out of it.

You must be logged in to view this image or video.

 

[Vegas Smith]

DSMers have been running the 7s since the beginning of time. I forget the exact reason. Something like the car drives faster with them in there.

 

[dsmcrzy]

BRP7's are one step colder of a plug compared to the BRP6's.

What do you know about the car? How much boost is it running. They are needed when you start running more boost.

https://www.ngksparkplugs.com/about-ngk/tech-talk/spark-plug-basics

 

[AndrewG]

BRP7's are one step colder of a plug compared to the BRP6's.

What do you know about the car? How much boost is it running. They are needed when you start running more boost.

https://www.ngksparkplugs.com/about-ngk/tech-talk/spark-plug-basics

It's running 20lbs of boost out of an FP 68hta turbo. I am trying to get it to pass emissions so maybe running the 6's will help. It failed once now because of HC and CO is too high. I am hoping to get it to pass with out having to dive into the ECU. I am still learning DSMlink so that is not something I want to get into without more knowledge first.

 

[Vegas Smith]

I've never heard of spark plugs effecting emissions, but I could be wrong. Do a few searches on best sparkplug to run and you'll find more than enough info about why the 7s are in the car.

 

[dsmcrzy]

Agreed. I would put the 7's back in. Is emissions done at idle? Or so they rev it a bit?

 

[Chumpaumpalumpa]

I've never heard of spark plugs effecting emissions, but I could be wrong. Do a few searches on best sparkplug to run and you'll find more than enough info about why the 7s are in the car.

3rd gen and newer hemi motors all have 2 plugs a cylinder because they couldn't meet emissions requirements with just one.
As for OP colder plugs with help with knock to a point but they foul quicker. With that said I'd be running 7s in your case.

 

[boostdawd]

Here in Arizona if it's a 96 and up they do the obd check. If it's 95 or below and awd they let it idle and slowly increase the rpms. OP, check to make sure u have a working cat. U can pass emissions by adjusting your fuel trims. I know u said its not something u want to do but u will need to learn how to tune with link eventually.

 

[dsmcrzy]

3rd gen and newer hemi motors all have 2 plugs a cylinder because they couldn't meet emissions requirements with just one.

Had no idea that was the reason. Thanks for the info.

 

[Chumpaumpalumpa]

 

[ChessmoDSM]

Don't mean to hijack this thread, but how much boost should one be running if you are going to use the 7's compare to the 6's?

This is on a 6 bolt stock 14b with MBC

 

[boostdawd]

Anything more than stock boost. Usually 18 or so. Theres more that come into play but that's the answer in a nutshell.

 

[AndrewG]

Agreed. I would put the 7's back in. Is emissions done at idle? Or so they rev it a bit?

Emissions is done on rollers I'm guessing to simulate driving conditions. I took it after changing the plugs out and it did better then the first time but still didn't pass. Gonna try and put e85 in it. The issue I am running into is CO emissions being too high after shifting.

 

[ChessmoDSM]

Do you have a Air/Fuel gauge? What does it show when you are shifting?

 

[AndrewG]

Do you have a Air/Fuel gauge? What does it show when you are shifting?

I believe I have a wideband O2 sensor. I have an air fuel gauge that also displays air fuel ratio. I would think those values would show in DSM link but not sure how to read the info from that yet. Still trying to remember all this stuff from 10 years ago, 3 days in and the learning curve is steep with this car.

 

[ChessmoDSM]

I hear you brother I am in my 40's and relearning all this stuff... BTW, I am an OG CO guy, was born and raised in the Cripple Creek area.. GO Broncos!!!

 

[Dsmkauai]

Is your bov recirculated?

 

[Vegas Smith]

Is your bov recirculated?

Speed density car, non-recirculated.

OP-I would suggest digging around and identifying exactly what parts you have on the car, then learning dsmlink and understanding how the car is setup without changing anything.

 

[AndrewG]

Is your bov recirculated?

No but I also don’t have a MAF.

 

[1990TSIAWDTALON]

Those plugs look great to me......

 

[AndrewG]

Those plugs look great to me......

Yeah they looked good to me as well, however changing them got the car to pass on HC but it just barely didn't pass on HC output. So I'm getting closer to passing.

 

[boostdawd]

Put a little bit of alcohol to reduce the emissions.

 

[Brembo]

I have 7s too for knock control. Want to try out the 8s but not ready for that yet. Set your fuel trims and make sure your cat is actually doing something.

 

[Brembo]

Arent you OBD2? If so in NJ they just check the emisssion monitors to be passed.

 

[curt-s]

Might even want to look at your ignition timing, if its off from stock and the potential to retard it a little. After all, you are not looking for max power here. There is a documented correlation between ignition timing and HC output..
that is, if you are looking to get crafty