well my car has 85k on it, and i thought it was feeling a little stumply in high and low RPM's 1k-2k and 5k-redline

so i decided to replace the sparks i bought some ac delco, and started taking the old sparks out, they were Bosch, now the guy at Autozone, he said those wouldnt last long in my engine... and i know the Boschs did not come stock on the lt1... so... i looked at the spark plugs and if what he says is correct they look like they have about 5-10k on them, if he was mistaken they must have had 50k on them or so

just wondering if u guys heard anything about bosches? on the lt1?

 

I would either go with the AC's or NGK. I have run Bosch before and had missing & Fouling problems

 

yea i took out 3 this morning and then i couldnt get to one
and had to goto work... so i'll see if the ac's will make it a little more pepy when the egines warm

 

I use the NKGTR55's with no trouble at all. Great plug.

 

well they look like a fresh pair but they look like theyve been heated a little

 

I am running bosch plus 2s at the moment and they have been fine for me.
I have had good luck with Bosch plugs but I plan on trying some NGKs soon.

 

I've been running Bosch Platinum +4's for a year now no problems, idles steady, no hesitation....which I'd expect for the price I paid for the bastages.

 

I have seen a huge problem with more then just me with the regulauar Bosche Platinums any of the +2-4 i havent heard any problems with, the regulaur seemed to have a extremly bad problem with burning that tiny little electrode off.
i say go for the ngktr55's for 2 bucks a peice.
just my 2cents

 

I use Bosch 4's. I put them in last month and they are running fine. Didn't really notice too much of a difference from the delc's.