NGK TR55 vs. AC-Delco R45LTS6 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 06-16-2005, 10:41 AM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default NGK TR55 vs. AC-Delco R45LTS6

Jr's3800 has been recommending the TR55s pretty frequently now, so I needed to make sure I get this info out there.

If you look at my mod list [below my sig pic], I do not have extensive mods. However I am running one heat range colder plugs [the TR55s]. My car seemed to have some timing retard, which I thought was due to the TPS Sensor being incorrectly setup [VERY incorrectly setup, btw]. I fixed that, but the timing retard feel was still there [hadn't improved whatsoever]. I reset the ECU twice, just to confirm this. There was something else wrong. At once point I was looking at the exhaust, and saw blue smoke! I freaked out, shut the engine off, and immediately pulled the plugs. Thank God they looked fine, put them all back in and I still cannot reproduce the blue smoke [still no clue where it came from]. The engine ran much better when I initially fired her up, and I had some serious timing issues then, along with a super rich mixture and a ton of problems.. but that timing retard feel was not there. At first I thought it may have been the plug wires, but my old wires were so freakin' shot, there was no way. I checked my plugs, they are rusty [yes, my old plugs have rust on the base of them, and it isn't just a little surface rust spot] but I thought, what the hell, can't hurt to change them out. Change my [new, less than 50 miles on them] TR55s, for my [probably 5 year old, 50,000 mile] AC-Delco T45LTS6'* [most likely stock heat range]. Sure enough, the beast was brought back to life. Timing retard feel was completely gone, and although I didn't throw her around [still need to do that transmission flush], she had a LOT more power. Put the TR55s back in, timing retard feel is back. I did this test three times, and there is no doubt in my mind that the TR55s are the culprit to my lost performance.

Above, I mentioned I replaced the plugs when the engine was running very rich and whatnot, if you are thinking that, that was the cause to the TR55s being a problem, that isn't because I ran the ACs during that, and I ran them a LOT more than the TR55s.

So how can a rusty, 50,000 mi plug beat a new <50 mi plug? Either the one heat range colder is too cold for my engine, or the AC Delco plugs are much better.

I have NO extra money to dick around with TR55s, I want a solid plug. For the timing being I will run my ACs, but they need to be replaced. The question I have now, should I replace them with the stock heat range [my 'upcoming mods' in my sig is ALL I am doing to this engine. After that, performance wise I am done], or one colder? Also I hope padgett drops by, to give the more recent part numbers, because I know he'* the AC-Delco guy around here, and I am sure the part numbers have changed on these old bastards.


-justin

EDIT: I also forgot to mention gaps. The AC'* I didn't mess with, and I am in the process of moving all my tools and whatnot to my garage, so I cannot find my plug gapper for the life of me. However, I had the TR55s gapped at .055" and .060" with no difference in performance. I'm going to assume the ACs have a .060" gap, because they were installed on the Magnavox Ignition.. but I could be wrong [I'll be sure to check them once I find my plug gapper].

EDIT EDIT: Sorry about the story, I have nothing better to do, so I thought i'd blow some time on writing this.
opensourceguy is offline   Reply With Quote
Old 06-16-2005, 12:01 PM   #2
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

I can't believe the TR55'* would have caused you any problems, or been any better or worse than any Delco plug. You've made so many changes to your ignition, it'* hard to tell.

If you have an ignition problem, I wouldn't suspect the TR55'* at all, but I'd look elsewhere. Even the non-obvious. How much juice is your alternator cranking out? That can cause a low spark voltage. Check your Accel coils, both hot and cold. Shoot out the plug wires.
willwren is offline   Reply With Quote
Old 06-16-2005, 12:07 PM   #3
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Justin with the problems you are having at the moment you may end up gassing out every set of plugs you put in there...

Never had a single issue with the TR55'*... After the TR55'* I will never go back to the AC R44LTS6 or R45LTS6.... If I didn't run the TR55'd I would most likely run the Rapidfire 14 with my type 2 set up....

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 06-16-2005, 12:21 PM   #4
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

What problems I am having at the moment? My car runs great! I had previous issues, yes. But those are long gone and fixed. I'd never drive the car, if she had major issues [like the ones I had a little while back].

Bill: My ignition is fine. The ACs work great in the car. The TR55s don't. Not sure what the problem is? I think I have narrowed it down to the fact that my TR55s are shot.

Voltage? Idle is 14.5, above idle it will sometimes jump up to 15.

With the ACs in the car, the engine runs like a dream, super smooth, all that wonderful stuff. TR55s make the car run like it'* got some serious timing retard.

Should I pick up another set of TR55s or should I go after some Rapidfire 14s? --Remember I have no money.. can't waste it.


-justin
opensourceguy is offline   Reply With Quote
Old 06-16-2005, 01:29 PM   #5
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Stick with the R45LTS6 or R44LTS6... These are the factory application plugs for a 3800 C

No timming retard or issues here... with the AC R44LTS6, R45LTS6, Rapidfire 3, Rapidfire3 platinum, Rapidfire 14 Platinum, NGKTR55 .... Only plugs I have had issues with are the Bosch plugs...

Being that the TR'* did not work for you stay with the stockers...

Did you fix the O2 sensor problem yet?

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 06-16-2005, 01:32 PM   #6
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Alright, so no need to go one range colder for me? These are cheap plugs, right? Not platinum or anything? And is that the most recent part number for them?


-justin
opensourceguy is offline   Reply With Quote
Old 06-16-2005, 01:33 PM   #7
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

None whatsoever. You don't have a supercharger or modified compression ratio. But there'* no harm in going one colder, either.
willwren is offline   Reply With Quote
Old 06-16-2005, 01:40 PM   #8
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

lol I think we all edited our posts at the same time!

Yeah, fixed my O2 Sensor 'problem.' All I needed was one [never had one on there.. don't say anything guys, i'm poor]. Captainmiller'* source of the guy on eBay was a great one. I couldn't get one locally [no clue why?], and I got it at a super deal, and super fast shipping.

The two lessons I learned on the car, was you cannot run a car without an O2 sensor, and a good, quality torque wrench is a lifesaver.


-justin
opensourceguy is offline   Reply With Quote
Old 06-16-2005, 01:52 PM   #9
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

I believe that the R44 is one range colder than the R45

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 06-16-2005, 03:34 PM   #10
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I'd like to toss out a guess that when you first started it up and it ran good that once you had misfires etc. a plug might have cracked.

It'* like the tire that just won't stay balanced. No one can figure it out because the problem is internal and you can't see or feel it. Just there!
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
NGK TR55 plugs Maymybonnieliveforevr 1992-1999 25 01-04-2007 08:04 AM
Bosch+4 Platinum VS. NGK TR55 in 96 Vin K (NA) SSE chipinnc General GM Chat 38 12-22-2006 03:59 PM
NGK TR55's MACDRIVE General GM Chat 3 12-05-2006 09:38 AM
NGK vs NGK vs NGK MACDRIVE General GM Chat 20 11-01-2006 01:11 PM
NGK TR55 plugs Midnight Express Performance, Brainstorming & Tuning 6 12-29-2004 02:17 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:32 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.