Bosch Platinum
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TECH Enthusiast
Joined: Sep 2004
Posts: 595
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From: Clarksville,Tn
Bosch Platinum Are Bosch platinum plugs crap? I put a set in about 2 weeks ago and the car runs like crap now on the bottom. It's a dog til about 3,000 and then it's like you turn a "power" switch on. Will crap plugs do this? I'm about ready to yank them out and shitcan them and get some different ones. 
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Launching!
Joined: Mar 2003
Posts: 207
Likes: 0
From: kansas
Bosch platinum's are not bad plugs. I ran the +4's in my TA for 7 years without switching them out. And I don't know why there's so much negative talk about them. All spark plugs will perform the same (it's kind of like asking which cat-back or cold-air intake will perform better). The only difference is in their tips (nickel, platinum, iridium, etc.) and the price you want to pay for 8 spark plugs. Platinum and iridium tips provide longer life and conduct better electricity. With nickel tips plugs, you'd have to replace them every 2 years or so. I've also ran the NGK iridiums and currently run Autolite platinums.
The "problem" your experiencing may be a tuning issue. After my header install, which also included new spark plugs (NGK iridiums) and wires, I experienced the "bogging" effect your describing. But after a computer tune, it went away.
The "problem" your experiencing may be a tuning issue. After my header install, which also included new spark plugs (NGK iridiums) and wires, I experienced the "bogging" effect your describing. But after a computer tune, it went away.
Last edited by LT1 Guy; Oct 7, 2004 at 12:32 AM. Reason: grammatical errors
The Bosch Platinum plug is an extremely good quality plug. I have a set of +4's in my car and my throttle response improved. I use them with a mix or two of nitro in the fuel. I'd take them over an NGK any day. The +4 is a spin off of a race plug. I have to agree with the above comments, that it's a tuning issue. You can tune with different plug designs, and if your good you can control ignition timing depending on what you do to em'. Here's some links for research:
http://www.autolite.com/framer.cgi?p...s/platinum.htm
http://www.championsparkplugs.com/default.asp
http://www.ngksparkplugs.com/
http://www.autolite.com/framer.cgi?p...s/platinum.htm
http://www.championsparkplugs.com/default.asp
http://www.ngksparkplugs.com/
Multiple electrodes is marketing crap, think about it, the spark will only follow one path at a time leaving the other 3 prongs to get dirty, if they were worthwhile the OEMs would be using them. One of the guys on the Impala board is married to an engineer at GM and she was paid to do testing on multiple electrodes and found nothing worthwhile, Platinums only benifit is longer life. Going to spark plug manufacturers websites to do research is not a great idea, anything they put out there for the public should be read as marketting material.
If you can't find TR55s try TR5 the difference is the gap, the TR55 comes at .050 which is what we want, the TR5 comes at .030 or .035 so you will just want to regap it.
If you can't find TR55s try TR5 the difference is the gap, the TR55 comes at .050 which is what we want, the TR5 comes at .030 or .035 so you will just want to regap it.
I run old school Autolite solid copper plugs, 1 degree hotter, I've never had a better plug in this car, tried the Bosch, tried the NGK TR55s, yada yada yada personally I don't care for either, between the cracking porcelan on the NGKs and the tips backing off no matter how tight I cranked them down on the Bosch, I took some old school racers advice and went to the Autolite old school plugs. Have yet to have any problems with them.
Originally Posted by 96capricemgr
Multiple electrodes is marketing crap, think about it, the spark will only follow one path at a time leaving the other 3 prongs to get dirty, if they were worthwhile the OEMs would be using them. One of the guys on the Impala board is married to an engineer at GM and she was paid to do testing on multiple electrodes and found nothing worthwhile, Platinums only benifit is longer life. Going to spark plug manufacturers websites to do research is not a great idea, anything they put out there for the public should be read as marketting material.
If you can't find TR55s try TR5 the difference is the gap, the TR55 comes at .050 which is what we want, the TR5 comes at .030 or .035 so you will just want to regap it.
If you can't find TR55s try TR5 the difference is the gap, the TR55 comes at .050 which is what we want, the TR5 comes at .030 or .035 so you will just want to regap it.
Last edited by sawedoff; Oct 7, 2004 at 10:38 AM.
TR55 are not OEM because they are not platinum, OEMs want platinum for the long life so they can say no tuneup for 100K. I will agree magazines and such are marketting and the most flagrant attempt at an "informational" book that is little more than marketting is TPISs one on modding smallblocks.
On the OEM plugs feveral Impala guys had big problems, after paying big $$$ for them they found 5 of 8 to be laeking combustion gasses within a few weeks. Have heard good reports on the Autolite 103 and 106 for the LT1.
On the OEM plugs feveral Impala guys had big problems, after paying big $$$ for them they found 5 of 8 to be laeking combustion gasses within a few weeks. Have heard good reports on the Autolite 103 and 106 for the LT1.
Originally Posted by 96capricemgr
TR55 are not OEM because they are not platinum, OEMs want platinum for the long life so they can say no tuneup for 100K. I will agree magazines and such are marketting and the most flagrant attempt at an "informational" book that is little more than marketting is TPISs one on modding smallblocks.
On the OEM plugs feveral Impala guys had big problems, after paying big $$$ for them they found 5 of 8 to be laeking combustion gasses within a few weeks. Have heard good reports on the Autolite 103 and 106 for the LT1.
On the OEM plugs feveral Impala guys had big problems, after paying big $$$ for them they found 5 of 8 to be laeking combustion gasses within a few weeks. Have heard good reports on the Autolite 103 and 106 for the LT1.
TECH Apprentice
Joined: May 2004
Posts: 330
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Get the plugs out of ur car asap. I had some in my first lt1 car and the electrode fell in the combustion chamber thanfully it went strait out the exhaust. The second set was on a 95 3.4 dohc lumina they burnt up after 500miles of driving. all i use now are acdelco rapidfires
Thread Starter
TECH Enthusiast
Joined: Sep 2004
Posts: 595
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From: Clarksville,Tn
I will be heading to O'reily's momentarily to get me some new plugs. Going to the track tomorrow night and I hate to run it like this. The car had the original plugs in it til about two weeks ago and I had no problems out of them, just thought I'd change them since they had 140,000 miles on them. lol I was actually surprised when I pulled them out and saw A/C Delco on them. I've NEVER had a good set of a/c til these. Most of the times I have bought a/c they were bad right out of the box so of coure I no longer mess with them.