I am thinking about the bosch platinum+4 spark plugs in my camaro.Have any of you used this plug?IF you have please let me know how they were.IF any out there can recomend anything better let me know. thanks for any help you can give me.

 

DON,T!!!!!!!!!!!!! only use delco's or ngk's in a LS1. Bosch plats do nothing but cause problems in anything they get put in. Seen it a million times.

 

Waaaaaaaaayyyy back when Bosch Platinums came out - like '84 or '85 - I tried them and I had problems too in my 15th Ann. TA as I actually melted the electrodes.

BUT, fast forward to modern times - I put in the Bosch Platinum+4's as I thought this is the best design to date and so I had to give them a second chance.

AWESOME - very pleased to say the least and by far the best design available and these have been in my car for about 2 1/2 years and 17,000 miles. I changed my original plugs after receiving a brand new GMAF that was calibrated wrong. Installed blue Taylor wires as well.

The Bosch Platinum+4 plugs are also supposed to be worth 1 HP per cylinder. So about 8 HP in our applications. Before anyone shakes their head, do you remember "indexing plugs" - no, well I do and any old school tuners do and know why - the need for this is eliminated by the +4 plug while providing the same results.

Give them a shot, you won't be disappointed. Good luck!

 

Thanks alot for the info.I am old school too.I still trying to learn all the computer controled parts.thanks to all feed back from the folks on this web site it saves me alot of money and time.

 

They`ve worked just fine for me too, recently pulled them out after 10K miles and they still look great so they`re staying.

 

I had nothing but a shity idle with the plus 4's but I've heard others praise them. I guess it's like many other mods on the LS1, you just won't know how your car will react to them until you try them.

topfig
MGySgt USMC

 

put them in mine in april when i did the heads & cam. working fine up to this point,knock on wood. i think they will be coming out to go to a different set for the juice after i get some weak links(clutch) & tuning done in the car.

 

hey ed f. i live in florence, do we know each other? do u belong to www.gcfba.com. i hang out some weeks at frisch's on fri./sat. nights on top of industrial rd. i have been to filmores a couple times. i drive the red WS6. if not we need to hook up sometime.
jerry

 

I have bosch plat. 2's and work fine for me had them in about 500 miles have noticed slightly better throttle response. no prob's yet....knock on wood

 

Jerry,we probley have seen each other.MY Z28 is red and it has black stripe's.Some times I cruise filmores,long john silvers.I enjoy edgewater on friday nights.They have a wonderful selection of RICE.There's nothing like seeing the best of japan in your rear view mirror.I had to go to the VA yesterday and today"ARMY INJURY'S".I don't normally drive my car in the rain.So tomarrow morning I'm going to try to clean my car up.I would be able to hook up late tomarrow afternoon.I'll bring you some import killer decals.My e mail is efriedhoff@fuse.net. See you later.

 

Again thanks for your input,it seams to be that LS1's are do not all act alike.Ported maf ends on my car ran worse,but on come cars they work like a charm.Hope you got your car out of the rain down there. ed f

 

I have the platinum 2's, they've worked fine so far. They seem to have less tendency to knock than the TR55's I used to have (but more than TR6's). They're a little cheaper than the +4's.

 

I will say this with experience as a professional mechanic.....All Bosch spark plugs are trash and should not be installed in ANY engine. I have seen MANY different problems with Bosch plugs, including melted electrodes, broken insulators(INSIDE the engine), and some brand new plugs that CAUSED mis-fires. Seems like when a car comes in with a driveability problem, Bosch plugs are the problem 95% of the time. And as far as "indexing" goes...yes it does work on regular plugs, but not when you have 4 electrodes shrouding the spark. The point of indexing is to provide an unobstructed path for the air/fuel mix to reach the spark.

I can't say anything about NGK's because I've never used them, but they seem to be the plug of choice for internet LS1 gurus. My vote goes for AC Delco plugs in any GM product, they may be stock, but they have NEVER let me down in any GM application.

 

I've been using the NGK IX55 plugs for 2 years now without complaint. (IX = Irridium) By the way the stock plug in LS1's is a Nippon Denso Platinum plug not an AC Delco. NGK's do seem to be the best peforming plug in the LS1. JMHO <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

<small>[ September 29, 2002, 04:30 PM: Message edited by: SOM SS ]</small>

 

thanks for all the info everybody.Jerry I emailed you my home phone# did you recieve it?

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SOM SS:
<strong>I've been using the NGK IX55 plugs for 2 years now without complaint. (IX = Irridium) By the way the stock plug in LS1's is a Nippon Denso Platinum plug not an AC Delco. NGK's do seem to be the best peforming plug in the LS1. JMHO <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The stock plug varies. My car came with AC Delco Platinum plugs.

topfig
MGySgt USMC

 

I just pulled out NGK TR-55's this weekend and put in Bosch +4's, mine runs better with the Boschs'.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mcflyz28:
<strong>I just pulled out NGK TR-55's this weekend and put in Bosch +4's, mine runs better with the Boschs'.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Unless there was something physically wrong with the NGK's, I'd have a hard time believing that statement.

 

well everybody,I installed the NGK TR55's.after installing the new plugs,I started my camaro and noticed that the were up about 400 rpm's. after the car ran for a couple of minutes the rpm's droped back down to where it normaly is at.[1000] rpm's.I did not test drive the car yet.torward the end of the plug installation I was having problems with spinal injury,and had a hard time standing.So if the weather/medical problems is not to bad I'm looking forward to taking it for a test drive.I also noticed the acceleration was much crisper,and back at the exhaust tips it seamed to have a cleaner/smoother sound.I would like to take this time to thank everybody for taking the time to help me.see ya ed f

 

i got some regualar nonplatinum bosch plugs gapped at .5 in my car and i havent had any problems with them.