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spark plugs for my 90
Thread Starter
Race Director
Joined: Aug 2000
Posts: 11,470
Likes: 764
spark plugs for my 90
ACDelco RAPIDFIRE Performance Platinum or Bosch OE Iridium?
having a tough time deciding - probably putting way too much into this, but getting ready to place an order with summit. comments???
having a tough time deciding - probably putting way too much into this, but getting ready to place an order with summit. comments???
Last edited by Joe C; Nov 4, 2013 at 09:42 AM.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 413
From: WV
You can buy what you want, but you are just spending more money for nothing ...The motor runs as it should with AC Delco FR5LS plugs and thats what I ended up using after trying them all... These are the plugs designed for the motor...
...WW
...WW
Race Director
Joined: Dec 2006
Posts: 10,383
Likes: 4
But even though there is zero performance gain in the pricier plugs, they do have significantly more hype. I don't know why I fall for it. But when I'm at the counter or on RockAuto I just can't resist the urge to buy the NGKs.
Maybe if AC Delco could put out a fancy ad with a young flat belly ooing and ahhing over the OEM plugs?
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Instructor
Joined: Apr 2007
Posts: 225
Likes: 1
From: Highland Village texas
I will say one thing its getting harder to get FR5lS plugs. I have to order them in as i cant get them locally anymore and even online sellers dont have a ton of em. I just ordered a pile of em. I think this number is on the endangered species list.
Pro
Joined: Mar 2013
Posts: 628
Likes: 13
From: Indiana
I spent the extra money for the NGK Iridiums not for the hype but because it is such a pain in the butt to change plugs that I don't ever want to do it again (5 hours and lots of flesh). They are good for 100k+ miles so I will never have to worry about them again. Well worth the extra money.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 413
From: WV
I spent the extra money for the NGK Iridiums not for the hype but because it is such a pain in the butt to change plugs that I don't ever want to do it again (5 hours and lots of flesh). They are good for 100k+ miles so I will never have to worry about them again. Well worth the extra money.
Last edited by WW7; Nov 5, 2013 at 07:23 AM.
Pro
Joined: Mar 2013
Posts: 628
Likes: 13
From: Indiana
I'll be dead when the next owner tries to change plugs. I also put never seize on the threads before installing. My wife has a 370Z and it has 32k miles on it so when she took it in for an oil change I told her to have them change plugs also. They told her they would have to remove the engine to do that and it would cost a huge sum of money. They told her the plugs are good for 100k miles and not to worry about them. What's good for the goose is good for the gander. I found out what plugs they use and put them in my vette.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Tried both went back to Delcos
All you need is a spark to light that fire off thats it.
Have the original plugs in my silverado 150k mi.
course thecar I never drive just got fresh ones. Hmm.
Prirorities lol
All you need is a spark to light that fire off thats it.
Have the original plugs in my silverado 150k mi.
course thecar I never drive just got fresh ones. Hmm.
Prirorities lol
Burning Brakes
Joined: Feb 2009
Posts: 767
Likes: 7
From: So.Florida, by way of Brooklyn
NGK FR45 for here in So. Florida.
Just a tad colder than the stock FR4 replacements.
Car had a funny idle flutter, with good fuel system in my 44k mile, '89 Automatic G92 model.
I found inside, and removed the Bosch Platinum Fusion's out (4 electrode type) and car now runs great, get's better mileage avg. believe it or not these past 500 miles or so, by +1.5 mpg, and I'm happy.
I use NGK TR55's in my modded '01 LS1 Formula as well. Love these plugs for over 35 years ever since using the BP5ES in my '69 Camaro w/454BB way back then, and NHRA SS/H car as well.
Just a tad colder than the stock FR4 replacements.
Car had a funny idle flutter, with good fuel system in my 44k mile, '89 Automatic G92 model.
I found inside, and removed the Bosch Platinum Fusion's out (4 electrode type) and car now runs great, get's better mileage avg. believe it or not these past 500 miles or so, by +1.5 mpg, and I'm happy.
I use NGK TR55's in my modded '01 LS1 Formula as well. Love these plugs for over 35 years ever since using the BP5ES in my '69 Camaro w/454BB way back then, and NHRA SS/H car as well.
Last edited by RapidRick; Nov 5, 2013 at 01:37 PM.