Laying over on the top end
Thread Starter
9 Second Club
iTrader: (6)
Joined: Aug 2002
Posts: 886
Likes: 0
From: Cecil County, MD
Looks like I found the culprit. #6 plug is black as can be. Coincidently this is the only cyl. that has an aftermarket coil pack on it. lol I will be putting 8 new coil packs on soon as they come in. I switched over to AR3933 plugs which are the same heat range. I want to run them and see how they act with the tighter gap before I go colder.
I'm not convinced 1 plug that looks out of tune was causing "really bad" layover....only on the top end. I guess the coil could be acting up over a certain rpm.....but it seems it would be more than one cylinder going rich to cause really bad power loss. Regardless....put a matched set of OEM coils on there damnit lol.
Thread Starter
9 Second Club
iTrader: (6)
Joined: Aug 2002
Posts: 886
Likes: 0
From: Cecil County, MD
Thanks guys. I'm hoping for a test hit next week when the other coils come in. I ordered 8 new ones and made up some new brackets to hold them down by the oil pan on each side. For some reason Amazon sent 1 coil and the other 7 are coming later.
I agree with you guys, I think between the 1 bad coil and all 8 plugs being opened up too much (from heat probably) that caused my issue. I hope to be able to report some good news after a few test passes.
I agree with you guys, I think between the 1 bad coil and all 8 plugs being opened up too much (from heat probably) that caused my issue. I hope to be able to report some good news after a few test passes.
Thread Starter
9 Second Club
iTrader: (6)
Joined: Aug 2002
Posts: 886
Likes: 0
From: Cecil County, MD
Made a total of 3 passes all in the 8s with a best of 8.68 @ 155mph. Needless to say I am really happy with that considering it was @ 18psi with a very conservative tune.
Thank for checking on me,
Frank
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Very nice series of passes. Great to see you getting more of the performance out of this car, like it was built for. I'm running the same D585 coils in my Nova. You have me wondering now if that might be why mine doesn't seem to pull much above 6,400 rpm.
How high did you turn up the engine with the new coils?
How high did you turn up the engine with the new coils?
Thread Starter
9 Second Club
iTrader: (6)
Joined: Aug 2002
Posts: 886
Likes: 0
From: Cecil County, MD
I usually shift at 6500 but my log on the 8.6 pass showed a 6700 rpm 1-2 shift. The engine pulls hard up to the 7100 rev limiter though. I just shft at less in hopes of keeping the engine happier for longer.
Teching In
Joined: Dec 2011
Posts: 30
Likes: 0
Sure did Garrett. It ran flawless on Saturday. First pass of the day it went 8.90!
Made a total of 3 passes all in the 8s with a best of 8.68 @ 155mph. Needless to say I am really happy with that considering it was @ 18psi with a very conservative tune.
Thank for checking on me,
Frank
Made a total of 3 passes all in the 8s with a best of 8.68 @ 155mph. Needless to say I am really happy with that considering it was @ 18psi with a very conservative tune.
Thank for checking on me,
Frank
It was a good weekend for a lot of people then we put my friends car in the
8's also, first time ever 8.94@ 156mph.
Thats great keep the good luck going and where's the video !!!!!
Thanks Garrett
Thread Starter
9 Second Club
iTrader: (6)
Joined: Aug 2002
Posts: 886
Likes: 0
From: Cecil County, MD
here is a couple vids for ya. Both same pass
Thread Starter
9 Second Club
iTrader: (6)
Joined: Aug 2002
Posts: 886
Likes: 0
From: Cecil County, MD
If you have one bad coil you should see one bad plug.
Thread Starter
9 Second Club
iTrader: (6)
Joined: Aug 2002
Posts: 886
Likes: 0
From: Cecil County, MD
Thread Starter
9 Second Club
iTrader: (6)
Joined: Aug 2002
Posts: 886
Likes: 0
From: Cecil County, MD
after normal driving it looked like that. I didn't really notice it was bad driving around. Not that I replaced it I noticed though. It is more responsive and smoother now.
I'm not 100% the coil pack was it. I could have had a severely fouled plug too. I changed everything at once so there is no way of knowing for sure.
I'm not 100% the coil pack was it. I could have had a severely fouled plug too. I changed everything at once so there is no way of knowing for sure.
Gotcha, that seems to be how it is in racing. I thought my valves were floating, did rockers, springs, pushrods all at once. Didn't really help all that much. Il pull the plugs again and check