Quick Spark Plug Help..

[chevyridinhigh79]

why shouldn't you run bosch platinum plugs? i just bought some tonight for my K10. my dad runs them in his new yorker and his power ram and both vehicles i have noticed run considerably better. my plugs right now are delco's and are set at 0.35, is that not enough for a vehicle with hei? the motor is a 305 h.o. out of a 85 monte carlo ss and advance said the gap for the plugs for it should be 0.35.

 

[blazerboss 85]

why shouldn't you run bosch platinum plugs? i just bought some tonight for my K10. my dad runs them in his new yorker and his power ram and both vehicles i have noticed run considerably better. my plugs right now are delco's and are set at 0.35, is that not enough for a vehicle with hei? the motor is a 305 h.o. out of a 85 monte carlo ss and advance said the gap for the plugs for it should be 0.35.

i ran bosch platinums in my blazer and they went bad after 10 months so i warrantied them for some autolites and i think that my engine is running better than it ever did with the bosch plugs.

 

[chevyridinhigh79]

how did it run before they went bad?

 

[dyeager535]

my plugs right now are delco's and are set at 0.35, is that not enough for a vehicle with hei? the motor is a 305 h.o. out of a 85 monte carlo ss and advance said the gap for the plugs for it should be 0.35.

.035 is pretty much the standard for SBC's with HEI. First year of HEI I think Chev was running .060, but the next year and then on out I think the 350 and 305 were always .035, or at least the majority.

From my experience, .035+ and you won't go wrong.

 

[chevyridinhigh79]

thanks i'll make sure there at 0.35 and see how it runs

 

[454k30]

I use bosch platinum and they work fine. I tried some ACs a couple weeks ago and the truck ran like it had an intermittant miss. I've had luck with the NGKs that 4x4 high uses. I use to use those too but that was before the heads were rebuilt and the NGKs seemed to foul out where the platinums did not.

 

[blazerboss 85]

how did it run before they went bad?

i didnt think they were anything special i wasnt dissapointed but it wasnt anything special it was just blah but i heard from a local shop that bosch isnt really made for american stuff

 

[chevyridinhigh79]

i have heard that before too, but i guess i'll see today how it runs. today is going to be the first time driving it in a few months!

 

[blazerboss 85]

well good luck

 

[chevyridinhigh79]

thank you. it does run better with the platinums in than with the delcos in

 

[chulisohombre]

thank you. it does run better with the platinums in than with the delcos in

glad u figured it out.you can make the spark gap as big as it doesnt hurt performance.to get a bigger spark you gap the plug bigger and bigger till it starts misfiring.then go back to the last gap that worked well.with a good ignition system you can gap out sometimes as far as .060 and still get good spark.the platinums will last longer and give a good spark because of the material used.i just like the standard ones because they cost half the price and still get the job done.