bur6eq plugs? 20b
#1
Senior Member
Thread Starter
bur6eq plugs? 20b
When I got my car it had bur6eq plugs in it. Leading and trailing. It also has an hpi ignition box. The turbine is a t88-33d, 6x1000cc injectors, and boost is set at 1.4 bar. Is that safe with the 6 heat range plugs? There was also 3 other sets of dead plugs on the passenger floorboard, 9's, 10's, and 11's. Thanks.
-Destin
-Destin
#3
Senior Member
Noticed your location is Japan. The land of the traffic jam.
The BUR6EQ plugs are a necessary evil to combate the low speed your 20B powered JC Cosmo is forced into. Although I am surprised it had the 6's in the trailing aswell.
These hotter plugs wont foul as quickly & will give better burning, thus fuel consumption.
The different heat range plugs in the glovebox of the car may have been for the previous owner to use when the occassion suited him. EG, highway driving
Personally, I run BUR6EQ + BUR8EQ for my 20B powered Cosmo as the lower RPM from the big block rotor requires hotter plugs. Gives me better running compared to the 7+9 combo seen in the manual gearboxed FD RX-7
The BUR6EQ plugs are a necessary evil to combate the low speed your 20B powered JC Cosmo is forced into. Although I am surprised it had the 6's in the trailing aswell.
These hotter plugs wont foul as quickly & will give better burning, thus fuel consumption.
The different heat range plugs in the glovebox of the car may have been for the previous owner to use when the occassion suited him. EG, highway driving
Personally, I run BUR6EQ + BUR8EQ for my 20B powered Cosmo as the lower RPM from the big block rotor requires hotter plugs. Gives me better running compared to the 7+9 combo seen in the manual gearboxed FD RX-7
#6
Senior Member
Originally posted by sillbeer
How would having 6's affect high boost, well 20 psi?
-Destin
How would having 6's affect high boost, well 20 psi?
-Destin
6 + 9 may be a different story.
With that type of boost, I would be using a 7+9 combo, maybe even colder depending if its street or race driven
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#8
Senior Member
Originally posted by Turbo 3
What about 9's all the way around and 1 Bar boost? Too cold?
What about 9's all the way around and 1 Bar boost? Too cold?
1-bar boost on the street. Use the 7+9 combo. Mazda didn't spend millions getting that combo sussed out for nothing mate...............REgards
#9
Lives on the Forum
I find running all 9's is perfectly fine for most people.
Only if you do the most heineous stop-and-go traffic jam driving will the 9's foul.
We run all 9's in our 13B's.
BTW, most 20B's I've seen are running the SD29 / 31(?) spark plugs when shipped.
-Ted
Only if you do the most heineous stop-and-go traffic jam driving will the 9's foul.
We run all 9's in our 13B's.
BTW, most 20B's I've seen are running the SD29 / 31(?) spark plugs when shipped.
-Ted
#10
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Thread Starter
Japanese guy told me to run all 11's for the dyno tomorrow. I think all 9's would be okay for normal driving and the occasional high boost. I'll post the dyno sheet tomorrow.
-Destin
-Destin
#11
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i usually run all 9's, but for tuning mine i went with 7's and 9's. they are still in it, and working fine
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