Sup guys i'm building my GSR, 11:1 CR CP pistons, brian crower stage2 cams, sk2 IM, all boltons, and was wondering if i should stick with OEM stock gap or i should change the gap, what you guys think.
Thanks

 

Are you having problems with miss-firing at .052"(GSR)~.044"(Type R)? if not, then... no.

 

I haven't start the engine yet, just wanted to know what would be the best spark plug or gap

 

i usually kept mine at around .045

 

i keep mine at 35

 

ngk bcpr 7es-11

 

whats the difference between ngk bcpr7es and the ngk bkr7e

 

I know the bk is copper, by I'm not positive if the bcp is iridium or something else

 

i ran coppers at around .32-.35.. it ran fine like that so i didn't mess with anything.. i'm sure i could've made the car run better messing with the gaps but it was fine how it was..

i could never get my car to drive right, or get in the right heat range with iridiums.. not to mention they are freaking expensive so making trips back and forth to o'reillys was a pain..

i'd recommend some coppers with the stock heatrange or a step colder, my plugs were nice and brown with a step colder on my 12:1 comp gsr build with pro2's

 

try the bcpr7es-11(standard) or the bcpr7ey-11 (v-power). i have noticed that the difference between the bkr7e and the bcpr7e is the size of the plug inside the threads. i think that part may be porcelain. the bcpr7e was larger and they always looked better than the bkr7e when i pulled them out to check. i dont know a whole lot about the science of spark plugs, i just know that my motor ran a little better and had better gas mileage with the bcpr7e's.

www.sparkplugs.com . you'll have them shipped in no time and they are cheap.

 

Just researched the difference between the two. other than the way they look, the difference between the bkr7e and the bcpr7e is the height of the plug. the bcpr7e has a measurement of 53mm from nut to electrode, as required by the JIS (Japanese industrial standard). the bkr7e has a measurement of 50.5mm, as required by the ISO (international standards organization).

 

ok, thanks guys, i think i'll take the bk since they are shorter

 

the bcpr's should be way cheaper...I usually pay under 3 a plug. The bkr being copper I have seen for 10 a piece

 

reading through you guys' posts.. i remember the plugs i used were the copper v-power plugs.. they seemed to spark much better than iridiums, and only 1.99 a plug!

 

were they the bk or bcp??

 

i use bkr7e and they are 1.99$ a plug ngk vpower
they are from 95 audi s5 or maybe it was s6

 

both of them are under 3 dollars on sparkplugs.com. they are both 2.89 per plug.

 

See what your car runs best at, doesnt take too long to gap plugs.

I found .35 works best for me