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Old 11-17-2018, 04:16 AM   #1
PFL
 
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spark plug NGK BR7ef or TR7ix, which is the best?

I am in doubt between these 2 plugs. I'm going with Procharger between 18psi and 20psi. every plug has its benefits. I'll be using 032 gap. E85 fuel. I accept suggestions

Last edited by PFL; 11-18-2018 at 02:40 PM.
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Old 11-17-2018, 08:52 AM   #2
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Hmmm sounds a lot like my set-up. My shop switched to NGK 4554 plugs because of my Brodix heads. Turns out these plugs have one additional set of threads on it which is needed on the Brodix head.

Whatever you decide on, with that psi and power range you should be looking at an 8 heat range plug, not 7.

You DID ask for opinions
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Old 11-17-2018, 10:42 AM   #3
Rob10CamaroSS
 
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Thats a nice amount of boost and boy oh boy it's going to be an ANIMAL

I dont want to start a Plug War and I cant disagree with BiggFoot and his BEAST but I do have a lot of experience (good & bad) with Boost and Spark Plugs so I can give you my personal experience. I've tried BR7's at least 4 or 5 times and I frigging hate them; they idle like sh!t, have low RPM misses, and they made my 2010 Camaro run like crap, but yes they work great at WOT. Because it's a non projected tip spark plug it's also very forgiving for Boost (and N20) so I do get why so many tuners and people use them.

To me nothing is smoother than Denso Iridium but the price is high and they are very fragile to high boost and N20 so I stopped using them. What I have found is if the tune is right, you have the right flowing fuel system & A/F, you should be able to adjust for higher boost with a smaller gap (which of course is also a trade off). I ran TR6's on 25lbs of boost on a Twin Screw Supercharger on a 9 second daily driver 5000lb pickup truck, and had the same TR6's in there for 3 years.

My Camaro has a Procharger D1 at @ 9lbs of boost and it had BR7's whan I bought it. I swear to you without me even looking I immediately knew it had BR7's just from the bad idle and low rpm misses. I immediately put TR6's in at 032 and it was like a different vehicle, I even called the original owner and told him you need to come by and drive it now, it's a totally different car. This is now the 2nd year with the same plugs and I drive it Very Hard every time I drive it.

I'm not saying put 6's in by no means, I'm just giving you my experiences with many supercharged vehicles and spark plugs. I would say you may have to try a couple of different plugs and gaps to find what works best FOR YOU, but just because you add more boost the answer is not always to go colder.
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Old 11-17-2018, 12:23 PM   #4
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Thanks biggfoot congratulations for the car.
Rob10camaross thanks for the explanation. wanted to hit the correct plug. I'm going to limit boost to a Th400 transmission. I have a long way to go. I'm using MSD cables, some say go to granatelli. Anyone else could tell which plug you are using for this boost level?

Last edited by PFL; 11-18-2018 at 02:41 PM.
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Old 11-17-2018, 01:30 PM   #5
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Gents, you can take anything I say, chew up the meat, and spit out the bones cause I don't know that much about tweaking cars, only about what has been done to mine (by the shop, not me).

All I know is a number of years ago there was a gent here that blew the top off a couple of his pistons. He was pushing about 13 psi on a Maggie plus NOS and whether or not too hot of a plug was the issue, at least that is what he thought. I discussed with my shop on my last jump with the Maggie to 13 psi boost and E85 at almost 800 hp, we switched from a 7 to 8 heat range plug and I am still running the 8 now with the F-1X at about 16 psi.
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DSS 9” Conversion (axles, driveshaft, pumpkin) & Strange 3.70 gears
McLeod RXT Twin HD Clutch & Upgraded Slave
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BMR Drag Suspension Package w/Strange shocks
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Old 11-18-2018, 07:54 AM   #6
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Quote:
Originally Posted by Rob10CamaroSS View Post
Thats a nice amount of boost and boy oh boy it's going to be an ANIMAL

I dont want to start a Plug War and I cant disagree with BiggFoot and his BEAST but I do have a lot of experience (good & bad) with Boost and Spark Plugs so I can give you my personal experience. I've tried BR7's at least 4 or 5 times and I frigging hate them; they idle like sh!t, have low RPM misses, and they made my 2010 Camaro run like crap, but yes they work great at WOT. Because it's a non projected tip spark plug it's also very forgiving for Boost (and N20) so I do get why so many tuners and people use them.

To me nothing is smoother than Denso Iridium but the price is high and they are very fragile to high boost and N20 so I stopped using them. What I have found is if the tune is right, you have the right flowing fuel system & A/F, you should be able to adjust for higher boost with a smaller gap (which of course is also a trade off). I ran TR6's on 25lbs of boost on a Twin Screw Supercharger on a 9 second daily driver 5000lb pickup truck, and had the same TR6's in there for 3 years.

My Camaro has a Procharger D1 at @ 9lbs of boost and it had BR7's whan I bought it. I swear to you without me even looking I immediately knew it had BR7's just from the bad idle and low rpm misses. I immediately put TR6's in at 032 and it was like a different vehicle, I even called the original owner and told him you need to come by and drive it now, it's a totally different car. This is now the 2nd year with the same plugs and I drive it Very Hard every time I drive it.

I'm not saying put 6's in by no means, I'm just giving you my experiences with many supercharged vehicles and spark plugs. I would say you may have to try a couple of different plugs and gaps to find what works best FOR YOU, but just because you add more boost the answer is not always to go colder.
Omg I feel exactly the same on the BR7's, I swap around between the TR7 and the BR's. Idle is definitely a little worse with the BR.
IMHO the simple copper tip is a hair colder on the BR vs the TR. yea they are the same heat range but that's what I get. Mine is tuned at 14lbs and I had the TR in at the time. But I currently have the BR's in.

Like mentioned prior, with your boost I would go to 8's.
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Old 11-18-2018, 08:45 AM   #7
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Quote:
Originally Posted by BiggFoot View Post
...
All I know is a number of years ago there was a gent here that blew the top off a couple of his pistons. He was pushing about 13 psi on a Maggie plus NOS and whether or not too hot of a plug was the issue, at least that is what he thought. I discussed with my shop on my last jump with the Maggie to 13 psi boost and E85 at almost 800 hp, we switched from a 7 to 8 heat range plug and I am still running the 8 now with the F-1X at about 16 psi.
As I originally said Bigg I cant disagree with you
AMOF I once cooked a $15K BRAND NEW built motor on the 1320 on it's first pass on that motor. And that was after the builder/tuner had the truck for a full month off and on the Dyno and street tweaking the tune.
In that case the builder had BR7's in it and we were running about 18/19 lbs of boost and 75 HP of N20.



One of the things I've learned over the years is different tuners will use different brands, different gaps, and different heat ranges on the identical set up, it seems to be tuner preference more than logic sometimes, LOL (or the tuner finds a combo that works and sticks with it).

Funny part is a few years later I threw a Procharger on a Mustang GT I had and used the same guy to give me a start up tune. AS he was strolling through the computer looking at my old tunes I saw one on the motor that blew up where the A/F was under 12 the whole run and then had a massive spike to over 15 A/F in the upper RPM's. I knew then the reason I blew up was because of his chi!tty tuning ability's and I never used him again. Live & Learn...

Bottom line is if you run good with 6's, 7's, or 8's, and the plugs read well then stick with it. In your case and massive power and boost (OK I'M JEALOUS) I would be running something colder then 6's and not BR7's so I would agree with your choice (especially at the tuners suggestion)
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Old 11-18-2018, 12:53 PM   #8
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Made 905whp on 19psi BR7EF (not br7es by the way)
Drive fine to me drive the car on the street all the time.

Tried TR7IX a while back and didn't notice any difference at all from the BR7EF to justify a $10 plug vs a $2 plug
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Old 11-18-2018, 09:29 PM   #9
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I run the TR7IX on mine gapped at .026 @ 15lbs around 800rwhp with the filter on a F1-A
and E-85 mostly street driven, no issues. I did run a larger gap but closed it down when I thought I was getting spark blow out, had a different issue, have had no reason to open the gap back up.
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