Standard spark plugs ?

[Frenchy Dehoux]

 
   What are the standard spark plugs for 36 hp /40hp or 1600 cc engine everyone is using NGK / Champion / Bosch / Beru / etc . Everyone has their preferences let me know.

   Thanks
   Frenchy

[pupjoint]

NGK for me. B5HS.

only prob for me is i have to order them from the US a couple of boxes at a time. cannot find locally.

can order easily from Napa.

despite the trouble i refuse to use Bosch plugs anymore. 

[GreenTom]

NGK BP7HS. (BP5HS are really hot plugs much hoter than Bosch W8AC) The quality of bosh went down really bad. lets say 4 on 10 are shit. I like to use Olish spark plugs made by Iskra (spark) http://www.iskra-kielce.pl/index,1.html really good quality, wide range temperatures and the prices are ok. A lot of people use them in Polski Fiat 126P when going fo rally (over 50HP from 750cc - nice toys)

[SlingShot]

NGK BP7HS. (BP5HS are really hot plugs much hoter than Bosch W8AC) The quality of bosh went down really bad. lets say 4 on 10 are shit. I like to use Olish spark plugs made by Iskra (spark) http://www.iskra-kielce.pl/index,1.html really good quality, wide range temperatures and the prices are ok. A lot of people use them in Polski Fiat 126P when going fo rally (over 50HP from 750cc - nice toys)

Just curious on why you think 5's are too hot. On NGK's site they suggest using B5HS for a Bus, and B6HS for a Beetle???
http://www.ngksparkplugs.com/part_finder/car_truck_suv/default.asp?mode=nml

I totally agree with the Bosch statement. 1 out of every 4 cars that come in the shop with a miss have W8AC's. If they get wet, toss em.

[Speed-Randy]

Why all the hate on bosch, I've never had a problem with them, in fact the only plugs I have had a problem with are NGK. only got 100 miles out of the set I was told were way better than bosch. No thanks, I'm staying with bosch

[Frenchy Dehoux]

    I appreciate everyone input on this subject.

    Thanks
    Frenchy

[GreenTom]

yes NGK say that BP5HS are for bugs but going with the temperature scale of NGK the number higher the spark colder. Does any od 044 head users put DPR5EA9 for example, no the DPR7EA9 is cooler plug than BP5HS (Typical plug for Honda Shadow for example) but you won't  see them on 044 heads. Mainly people use DPR8EA9 or eaven DPR9EA9 (lets say for Nitrous for example).
In my opinion it is the best to take few types of plugs and chose those which suit yourre engine the best. I know that BP5HS are grate for our winter but in the summer I prefer using Iskra F95  (which is cooler than BP7HS) and then the plug looks nice and light instead black (eaven with ARF adjusted properly).

the more tests the plug chosen better in my opinion

[Jim Ratto]

NGK BP7HS. (BP5HS are really hot plugs much hoter than Bosch W8AC) The quality of bosh went down really bad. lets say 4 on 10 are shit. I like to use Olish spark plugs made by Iskra (spark) http://www.iskra-kielce.pl/index,1.html really good quality, wide range temperatures and the prices are ok. A lot of people use them in Polski Fiat 126P when going fo rally (over 50HP from 750cc - nice toys)

Just curious on why you think 5's are too hot. On NGK's site they suggest using B5HS for a Bus, and B6HS for a Beetle???
http://www.ngksparkplugs.com/part_finder/car_truck_suv/default.asp?mode=nml

I totally agree with the Bosch statement. 1 out of every 4 cars that come in the shop with a miss have W8AC's. If they get wet, toss em.

Bosch heat range = smaller number is colder plug. NGK is the opposite.