spark plugs
#1
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spark plugs
ok I have a 13B 4-port from a 77 rx-4 I believe in my 84 gsl se. Now it has been streetported. I have plugs in it right now that are meant for a 84 gslse and well they got in a flooding about 15 times and they're not acting well. I did manage to get my hands on some plugs for a 77 13B 4-port. They are the BR7ET plugs. Are these ok? Thanks guys.
#4
love the braaaap
I would think that they would be fine. The engine really isn't that much different from a later 13B, so I would think that the later plugs would work too, but I have no experience with early rotaries. Hell, I don't have too much experience with my rotary. But as far as I know any plug should work.
#6
Lapping = Fapping
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So did you keep the points dizzy in the old engine?
The old addage applies. Use the plugs that match the ignition system. You can move up or down in the heat range from there.
I've had great results with BR8EQ-14 in all my 13Bs ranging from '74 to '80-something JDM housings with stock FB ignition and direct fire. The couple times I've tried FC BUR7EQs (in leading holes), they've given great results as well with direct fire. Trailing is best with BR8EQ-14 because it's running through the cap and rotor and matches the ignition system.
The old addage applies. Use the plugs that match the ignition system. You can move up or down in the heat range from there.
I've had great results with BR8EQ-14 in all my 13Bs ranging from '74 to '80-something JDM housings with stock FB ignition and direct fire. The couple times I've tried FC BUR7EQs (in leading holes), they've given great results as well with direct fire. Trailing is best with BR8EQ-14 because it's running through the cap and rotor and matches the ignition system.
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Ok not stealing the thread but 1 question:
I run BR8ET's in my 12aB. They generally come out a creamy colour, which means they are burning ok, but should I try go a colder plug to reduce engine temp? When boosting my engine goes up to half way mark after a few hard pulls. Is this bad?
I run BR8ET's in my 12aB. They generally come out a creamy colour, which means they are burning ok, but should I try go a colder plug to reduce engine temp? When boosting my engine goes up to half way mark after a few hard pulls. Is this bad?
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#8
it WILL run
Originally posted by heb09
Ok not stealing the thread but 1 question:
I run BR8ET's in my 12aB. They generally come out a creamy colour, which means they are burning ok, but should I try go a colder plug to reduce engine temp? When boosting my engine goes up to half way mark after a few hard pulls. Is this bad?
Ok not stealing the thread but 1 question:
I run BR8ET's in my 12aB. They generally come out a creamy colour, which means they are burning ok, but should I try go a colder plug to reduce engine temp? When boosting my engine goes up to half way mark after a few hard pulls. Is this bad?
#10
it WILL run
Originally posted by heb09
its a series 2 one. Sits at the front underneath the radiator.
its a series 2 one. Sits at the front underneath the radiator.
if the plugs have that good of a color i would see if the rad is working right, might need to be taken to a shop
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Originally posted by heb09
Ok not stealing the thread but 1 question:
I run BR8ET's in my 12aB. They generally come out a creamy colour, which means they are burning ok,,,
Ok not stealing the thread but 1 question:
I run BR8ET's in my 12aB. They generally come out a creamy colour, which means they are burning ok,,,
#14
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Once again, those are color characteristics of a 4-cycle piston engine where 3 of the cycles lacks a combustion event leading to that "colorizing". One thing most people don't realize, because of the Chilton's manuals and their "color" instructions, is that you're supposed to get a fresh set of plugs and make a run down the street and back....let it cool down, then pull the plugs for a read...... The constant burn nature of the rotary combustion "chamber" isn't supposed to lend itself to the same color imparting characteristics. If it does, that would be nice. I can't remember where I read that plug colorization is different. Racing Beat catalog comes to mind or maybe it was on the YawPower site....
#15
Lapping = Fapping
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Like I said, you can sort of read rotary plugs. Heh, seems like you know more about it than I do.
Try this technique. Take your car for a hard run somewhere. Then shut it off quickly. Coast to a stop and allow the engine to cool enough so you can remove the plugs without damage to anything (the aluminum, your hands etc). Take a look. I think Lynn E Hannover mentioned that technique a while back.
Try this technique. Take your car for a hard run somewhere. Then shut it off quickly. Coast to a stop and allow the engine to cool enough so you can remove the plugs without damage to anything (the aluminum, your hands etc). Take a look. I think Lynn E Hannover mentioned that technique a while back.
#17
Lapping = Fapping
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The 2nd gen plugs require a bit more power such as from a direct fire ignition system, but some people have tried them with a stock 1st gen (through the cap) ignition system.
I've gone to 2nd gen plugs in the leading holes in two engines with DLIDFIS so far and have had great results.
The next time I buy spark plugs, I'll get BUR7EQ (2nd gen leading) and put them in the leading holes of my other engines. I'll use stock 1st gen plugs (BR8EQ-14) in the trailing holes because it's still going through the distributor cap.
To put it simply; use plugs that match the ignition system.
I've gone to 2nd gen plugs in the leading holes in two engines with DLIDFIS so far and have had great results.
The next time I buy spark plugs, I'll get BUR7EQ (2nd gen leading) and put them in the leading holes of my other engines. I'll use stock 1st gen plugs (BR8EQ-14) in the trailing holes because it's still going through the distributor cap.
To put it simply; use plugs that match the ignition system.
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piston vs. rotor?....
I know a thing or two about boingers, it's the rotary side of reading plugs that eludes me...I only know what I've read somewhere else on the subject...
I know a thing or two about boingers, it's the rotary side of reading plugs that eludes me...I only know what I've read somewhere else on the subject...
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Re: spark plugs
Originally posted by YapaKanichi
ok I have a 13B 4-port from a 77 rx-4 I believe in my 84 gsl se. Now it has been streetported. I have plugs in it right now that are meant for a 84 gslse and well they got in a flooding about 15 times and they're not acting well. I did manage to get my hands on some plugs for a 77 13B 4-port. They are the BR7ET plugs. Are these ok? Thanks guys.
ok I have a 13B 4-port from a 77 rx-4 I believe in my 84 gsl se. Now it has been streetported. I have plugs in it right now that are meant for a 84 gslse and well they got in a flooding about 15 times and they're not acting well. I did manage to get my hands on some plugs for a 77 13B 4-port. They are the BR7ET plugs. Are these ok? Thanks guys.
I have the same engine, and I use the plugs for an N/A 2nd gen in mine. It works quite well.
#23
Lapping = Fapping
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Heh, I was just talking about my '76 Cosmo engine in a different thread. Here you go.
Hayes told me to get a set of BR7ETs for my REPU way back in '97 when I asked them about plugs. Well, I stuck with BR8EQ-14s and I'm glad I did. Now I'm going to move everything over to BUR7EQs in leading on everything with DLIDFIS (which is everything by the way) the next time I do a 'tune up' (not really tuning the carb, so why is it still called that?).
I know why Hayes says that. It's because of the old style ignition systems of of all the pre '81 engines. They're not in business to tell you how to upgrade the ignition system of your older rotary. Again, my '76 13B ran much better after after upgrading to BR8EQ-14s with an '81-'85 distributor in my Cosmo. Then upgrading to DLIDFIS made it run way better. Infact, after sitting for several months with a bad fuel pump, after I changed it and went to crank the engine, it fired up in the first second of cranking! It was like RrMMMMMMM. I was more worried about oil pressure at that point since the engine fired up a little too quickly (before the oil pump had a chance to build a little oil pressure).
Of the two series, do I like BUR_EQ or BR8EQ-14 better? I'd say it's best to match the plug to the ignition system. That means if I'm running a direct fire ignition system on leading (all of my engines are currently running this way), I'd say to go with the plugs that Mazda's and NGK's engineers used = BUR7EQ. As for trailing, again, I'll go with the engineers' favorite choice = BR8EQ-14 because it matches that particular ignition system (through the cap). I've now done two engines like this (three if you count my 20B's leading circuit only) and see no reason to change.
Hayes told me to get a set of BR7ETs for my REPU way back in '97 when I asked them about plugs. Well, I stuck with BR8EQ-14s and I'm glad I did. Now I'm going to move everything over to BUR7EQs in leading on everything with DLIDFIS (which is everything by the way) the next time I do a 'tune up' (not really tuning the carb, so why is it still called that?).
I know why Hayes says that. It's because of the old style ignition systems of of all the pre '81 engines. They're not in business to tell you how to upgrade the ignition system of your older rotary. Again, my '76 13B ran much better after after upgrading to BR8EQ-14s with an '81-'85 distributor in my Cosmo. Then upgrading to DLIDFIS made it run way better. Infact, after sitting for several months with a bad fuel pump, after I changed it and went to crank the engine, it fired up in the first second of cranking! It was like RrMMMMMMM. I was more worried about oil pressure at that point since the engine fired up a little too quickly (before the oil pump had a chance to build a little oil pressure).
Of the two series, do I like BUR_EQ or BR8EQ-14 better? I'd say it's best to match the plug to the ignition system. That means if I'm running a direct fire ignition system on leading (all of my engines are currently running this way), I'd say to go with the plugs that Mazda's and NGK's engineers used = BUR7EQ. As for trailing, again, I'll go with the engineers' favorite choice = BR8EQ-14 because it matches that particular ignition system (through the cap). I've now done two engines like this (three if you count my 20B's leading circuit only) and see no reason to change.