Advise on setup and Help with plug reading please.
02-09-2016, 01:15 AM
#1
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Advise on setup and Help with plug reading please. A little bit about my setup, it's a full bolt on (stock heads and can) 06 LS2 corvette with the 6L80 and yank ss3600 with 3.42 gears. I have a nitrous outlet dual stage setup with 2 15 lbs tanks, 1 shot is a 75hp and the other is 150hp. The car only picked up 45 RWHP/TQ on the 75 shot and 164 RWHP/ 147 RWTQ on the 150.
I made a few 1/8 passes with the new setup, on motor I was getting 7.28 at 95.28 mph then with the 75 shot I went 7.02 at 97.95 mph with bumping the rev limiter, so that's about what I'd expect to gain with that shot. Now this one confuses me, the 150 shot that made 119 RWHP ran almost identical to the 75 shot getting a 6.96 at 97.94 mph. Both runs I got the same 60 and didn't spin, I'm pretty sure it wasn't blowing through the converter (the scan doesn't show anything odd), It didn't feel any different than the 75 shot to me. I did try the 150 the week before and didn't get the gains I'd expect then either. That week I ran 7.35 na at 93.7and 6.83 at 99.9 on the 150, I didn't get a chance to try the 75 that day. Any reason why it didn't pick up mph or et?
I'm new to plug reading and just wanted to make sure I was reading this one right, here's the number 5 cylinder plug. I think it could use more timing but I didn't want to mess with that until I had a better idea what the markings on the plug looked like.
I made a few 1/8 passes with the new setup, on motor I was getting 7.28 at 95.28 mph then with the 75 shot I went 7.02 at 97.95 mph with bumping the rev limiter, so that's about what I'd expect to gain with that shot. Now this one confuses me, the 150 shot that made 119 RWHP ran almost identical to the 75 shot getting a 6.96 at 97.94 mph. Both runs I got the same 60 and didn't spin, I'm pretty sure it wasn't blowing through the converter (the scan doesn't show anything odd), It didn't feel any different than the 75 shot to me. I did try the 150 the week before and didn't get the gains I'd expect then either. That week I ran 7.35 na at 93.7and 6.83 at 99.9 on the 150, I didn't get a chance to try the 75 that day. Any reason why it didn't pick up mph or et?
I'm new to plug reading and just wanted to make sure I was reading this one right, here's the number 5 cylinder plug. I think it could use more timing but I didn't want to mess with that until I had a better idea what the markings on the plug looked like.
Last edited by dicky98z; 02-09-2016 at 01:22 AM.
02-10-2016, 07:00 AM
#7
Plug is richer than Bill Gates. I can't see the timing mark. Take some fuel out, along with some timing to be on the safe side.
Also, do a search. Plenty of info on plug reading on the web. Here's one for starters:
http://www.dragstuff.com/techarticle...-pictures.html
Also, do a search. Plenty of info on plug reading on the web. Here's one for starters:
http://www.dragstuff.com/techarticle...-pictures.html
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02-10-2016, 11:57 AM
#8
Was that plug only installed for that run and then pulled? If so, I agree that is rich. Also you are going to want to check the other plugs to see what is going on, particularly #7.
02-10-2016, 01:11 PM
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Ok, thanks I'll try adjusting it at the track next time. This is number 5 cylinder, I only pulled this plug since I was at the track and they were about to close.
02-11-2016, 10:52 AM
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I put the plug in right before the run so I only driven it from the pit to the start line with a little burnout. Soon as I crossed the traps I shut it down and put it in neutral, swapped plugs and went home.
02-12-2016, 12:47 PM
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I'm starting to think last time at the track I accidentally used the 75 shot on both runs because yesterday I did some street pulls (75 vs 150) and there's definitely a difference haha. I got the shift problem fixed so now I plan to go back to the track and get better plugs to read and hopefully better times.