i have msd wires and NGK bcpr6eix. I was told that i should run one step colder. Should i get NGK 7's or go with something else? One more question, is it ok to use NGK and MSD together?
need help with spark plug!
- Thread starter mk3tattoos
- Start date
Yes its a good idea to go with the 7 heat range. bcpr7's or bkr7e's. I believe the bcpr's are the correct plug for the 7m but most people,including myself, run the brk7's-part#6097.-I believe the only difference is the height. And yes you will be fine running msd wires and ngk plugs.
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WhtMa71;1231273 said:
thanks for the clarification WhtMa71. So is the bkr7' shorter or taller? thanks.
You want to run the BCPR7ES for a 1 step colder plug, and that is if you are above stock boost levels. Gap at 0.028".
The BCPR7ES plugs are JIS height, BKR7E plugs are ISO height (same as Autolite 3923). With some plug wires, the shorter height will cause arcing between the wire and plug terminal causing a misfire. There is zero advantage in using a shorter plug...I've been wondering for a long time why guys think it's ok or recommend the ISO height plugs. It doesn't make any sense.
The BCPR7ES plugs are JIS height, BKR7E plugs are ISO height (same as Autolite 3923). With some plug wires, the shorter height will cause arcing between the wire and plug terminal causing a misfire. There is zero advantage in using a shorter plug...I've been wondering for a long time why guys think it's ok or recommend the ISO height plugs. It doesn't make any sense.
mk3tattoos;1231701 said:
Huh? :: no ::
I'd like to here how a colder plug would significantly affect EGT. I'd buy off on preventing pre-ignition, detonation, misfires or fouling though.
http://www.ngksparkplugs.com/techinfo/spark_plugs/techtips.asp?
To be fair, an ignition problem can affect EGT, but it's the efficiency of the of the A/F ratio burn in the cylinder...a spark plug in the correct heat range will effect the burn only as the ignition source. Now, if it's causing a misfire (or worse), EGT will show it. The ability of a colder plug to remove heat from the combustion chamber (plug tip) will not result in lower EGT's...the quality of the ignition and subsequent burn will however.
im running stock boost but i plan on turning it up soon after a retorque, should i just buy brk7's?
hey guys,are u changing you plug wires bcause ur car ran rich,or perhaps there was thick white smoke coming out of ur exhaust???(i have that problem and i am trying to fix it,i have rebuild the entire engine replaced all hoses,someone please help meeeeeeeeee aarrggghhhh,i also have mhg and new bolts
I'd have to get some ngk's bcpr7es soon before I crank my new motor over...what are some good brand of wires to install? The one's coming off of the old motor look like they broke....