Bosch spark plugs 4++++
I think they run about the same as all the others. I ran them for a long time. After hearing everyone bitch about them I switched the "god" of spark plugs.....tr55's. I didn't notice any difference...power, mpg,...
They (tr55's) are cheaper than the Bosch +4's but you gotta change em more often.
They (tr55's) are cheaper than the Bosch +4's but you gotta change em more often.
Launching!
Joined: Apr 2005
Posts: 232
Likes: 0
From: Florida
[QUOTE=jay_99z]I think they run about the same as all the others. I ran them for a long time. After hearing everyone bitch about them I switched the "god" of spark plugs.....tr55's. I didn't notice any difference...power, mpg,...
"The GOD of spark plugs", thats funnay as hell. I replaced mine about 10k or so ago because my car still had the original AC's in there from the previous owner. The +4 plugs made a BIG difference. I have been told by others on here that they are no good at WOT, but when I had my car dynoed, if you look at my air/fuel on my sheet, it showed to be a perfect line, straight as an arrow across the board everytime. I personally am not sure about why platinum is no good, but it seems to be more of a preference for people. I know a guy that works at autozone and he said it was all preference as well. My car runs strong though, maybe when I get my headers put on in the next couple of months I will try the NGK's, until then, Im staying with the Bosch.
"The GOD of spark plugs", thats funnay as hell. I replaced mine about 10k or so ago because my car still had the original AC's in there from the previous owner. The +4 plugs made a BIG difference. I have been told by others on here that they are no good at WOT, but when I had my car dynoed, if you look at my air/fuel on my sheet, it showed to be a perfect line, straight as an arrow across the board everytime. I personally am not sure about why platinum is no good, but it seems to be more of a preference for people. I know a guy that works at autozone and he said it was all preference as well. My car runs strong though, maybe when I get my headers put on in the next couple of months I will try the NGK's, until then, Im staying with the Bosch. It's not the platinum that is the problem, it's just the Bosch plugs. They have never ran good in anything I have owned. The cars I've used them in always seem to run "rougher", and don't accelarate as smooth as the AC's or the NGK's. If you want an awesome plug, get the NGK TR55ix's. They are the iridium version of the TR55 and will last a loooooooong time.
ya i had the denso' in my car but i didnt find that out untill i went to change em for ngk 
but um yes platinum dosnt hold up to well under alot of power copper is better oh and yes im pist about my dyno results if anyone cares....i do 
but um yes platinum dosnt hold up to well under alot of power copper is better oh and yes im pist about my dyno results if anyone cares....i do Trending Topics
GMHTP recently did a test at QTP using fresh "TR55's" and fresh "Brisk premium LGS" spark plugs. It has a silver ground electrode and eliminates indexing. Back to back dyno test, the brisk made 3.3 more rwhp and 0.4 more rwtq. I don't no how much is just dyno fluctuating, but take it as it is I guess..
Dan
Dan
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