Plugs after running at the track
Thread Starter
TECH Enthusiast
Joined: Apr 2008
Posts: 654
Likes: 0
From: Dickinson, Tx
Plugs after running at the track If this in the wrong forum sorry.
I ran last night and was running rich on motor and nitrous. I was tuned by SNL and the A/F was 12.4 through the whole run. I changed the plugs once I got home from the tune. So the plugs have been on there for about 2 weeks. The only thing that changed was elevation +4,000ft. Is my MAF screwed or something else?
Front 2 on Driver side
Rear 2 on Driver side
Front 2 on Pass Side
Rear 2 on Pass Side
On Motor, Starts around the 2min mark
On Nitrous, can't tell when it starts. I have a jet for 150 shot and a 100 shot for the fuel
Could it be my MAF or Vararam?
I ran last night and was running rich on motor and nitrous. I was tuned by SNL and the A/F was 12.4 through the whole run. I changed the plugs once I got home from the tune. So the plugs have been on there for about 2 weeks. The only thing that changed was elevation +4,000ft. Is my MAF screwed or something else?
Front 2 on Driver side
Rear 2 on Driver side
Front 2 on Pass Side
Rear 2 on Pass Side
On Motor, Starts around the 2min mark
On Nitrous, can't tell when it starts. I have a jet for 150 shot and a 100 shot for the fuel
Could it be my MAF or Vararam?
Thread Starter
TECH Enthusiast
Joined: Apr 2008
Posts: 654
Likes: 0
From: Dickinson, Tx
Dyno sheet
http://i49.tinypic.com/16b0lqa.jpg
2006 GTO Built A4 LS2
Headers, Vararam intake, 72# inj, 3200 stall on 18" rims with 285 Nitto 555Rs
http://i49.tinypic.com/16b0lqa.jpg
2006 GTO Built A4 LS2
Headers, Vararam intake, 72# inj, 3200 stall on 18" rims with 285 Nitto 555Rs
Thread Starter
TECH Enthusiast
Joined: Apr 2008
Posts: 654
Likes: 0
From: Dickinson, Tx
Go easy on me. I don't know I'm playing with fire. No hand held or any way of knowing on nitrous. On motor I'd have to ask my tuner what is was pulling during the run if he can even look that up.
Thread Starter
TECH Enthusiast
Joined: Apr 2008
Posts: 654
Likes: 0
From: Dickinson, Tx
I got a stethoscope and listened to my valves. LOL, I had no idea it would be that clear to hear and is a pretty neat tool for 10 bucks. I didn't hear a big difference from each one. I put it on the each exhaust header then on the valve cover over each cylinder. I couldn't make out a difference but I'm going to try and hook up a recorder to it and see if anyone can tell.
So I went and got some OEM plugs and gapped them to .040 and took off my mufflers and ditched the breakout IAT. I was told that removing my mufflers would cause my engine to run a little leaner. I have Flowmasters 40 and was told they are to restrictive.
This is from the other day when I went to the track. Motor only but smoothed to .50 sec
New OEM plugs gapped to .040, no mufflers and no break out IAT. Motor only but smoothed to .50 sec
I'm letting my engine cool before pulling the plugs and seeing what they look like.
So I went and got some OEM plugs and gapped them to .040 and took off my mufflers and ditched the breakout IAT. I was told that removing my mufflers would cause my engine to run a little leaner. I have Flowmasters 40 and was told they are to restrictive.
This is from the other day when I went to the track. Motor only but smoothed to .50 sec
New OEM plugs gapped to .040, no mufflers and no break out IAT. Motor only but smoothed to .50 sec
I'm letting my engine cool before pulling the plugs and seeing what they look like.
Trending Topics
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 Thread Starter
TECH Enthusiast
Joined: Apr 2008
Posts: 654
Likes: 0
From: Dickinson, Tx
Recorded Valve train on each cylinder. Hear any differences?
EDIT: New video
http://www.youtube.com/watch?v=BYJnJS5rNoc
EDIT: New video
http://www.youtube.com/watch?v=BYJnJS5rNoc
Last edited by danieloneil01; May 30, 2010 at 07:02 PM.
Thread Starter
TECH Enthusiast
Joined: Apr 2008
Posts: 654
Likes: 0
From: Dickinson, Tx
Is it possible that some injectors are over injecting?
Can each injector be adjusted with hptuners or are they adjust as a whole unit? Car runs great but I though about switching the injectors around to see if a clean plug gets rich on a known rich injector/cylinder.
Can each injector be adjusted with hptuners or are they adjust as a whole unit? Car runs great but I though about switching the injectors around to see if a clean plug gets rich on a known rich injector/cylinder.