Something's not right. Possible meth problems....
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Wow FYREANT.. this is turning out to be a little gremlin. Just to throw our experiences in, we had 10#'s of boost at 650-670 rwhp and the single nozzle was perfect. Our alky control **** was set to 8. Our current build has us hopefully around 850 rwhp and we are swapping out the pulley. Looking to be around 14#'s with a cam / forged / dual nozzle meth setup. Not sure where my alky **** will be but I will pass it on when our tuner finishes our build.
Im pretty sure the LT1 is supposed to be targeted at 12.6-12.8 AFR at WOT. in my vid it gets as low as 11.7.
Melting Slicks
Joined: Dec 1999
Posts: 2,039
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From: Tulsa, Ok
Keep the dual set up and install 2x7gph then retune. I know that's what I'd be thinking. Was 8.8# boost your peak or did you let off early?
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
I saw your AFR going a bit fat at 13 and bouncing all over. Thinking top fuel and how they get flame outs from time to time. Don't know if that's happening with yours but maybe the fore cylinders are getting a bit more liquid. Julio said it will never go full boogie until 14+/- psi so you may only see 80psi on the meth instead of 150 where it will atomize better.
Keep the dual set up and install 2x7gph then retune. I know that's what I'd be thinking. Was 8.8# boost your peak or did you let off early?
Keep the dual set up and install 2x7gph then retune. I know that's what I'd be thinking. Was 8.8# boost your peak or did you let off early?
Team Owner
Joined: Jan 2007
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From: cookeville tennessee
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Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
OK I think we figured out what is going on with my car! To those of you who thought it was too much meth, including myself, it appears we were not correct. At least, not at this point. The issue appears to be that the spark plug on cylinder 4 has a crack in the porcelain causing that cylinder to misfire. The misfire count on that cylinder was up to 40-50 on a single run which was not all the way up to redline. To confirm our suspicions, we swapped cylinder 4 with cylinder 1 (opposite bank) to see if the issue followed, and of course, it did. So, I am overnighting a full set of new NGK 6510's so I have some spares. I'll install the replacement for that 1 faulty plug and then trek back up to Bradenton for Matt to put it back on the Dyno and get her dialed in just right.
Big thanks to Matt@FSP for being available to me on a Sunday to diag my issue!
Big thanks to Matt@FSP for being available to me on a Sunday to diag my issue!
Safety Car
Joined: Oct 2003
Posts: 3,838
Likes: 85
From: DFW Texas
OK I think we figured out what is going on with my car! To those of you who thought it was too much meth, including myself, it appears we were not correct. At least, not at this point. The issue appears to be that the spark plug on cylinder 4 has a crack in the porcelain causing that cylinder to misfire. The misfire count on that cylinder was up to 40-50 on a single run which was not all the way up to redline. To confirm our suspicions, we swapped cylinder 4 with cylinder 1 (opposite bank) to see if the issue followed, and of course, it did. So, I am overnighting a full set of new NGK 6510's so I have some spares. I'll install the replacement for that 1 faulty plug and then trek back up to Bradenton for Matt to put it back on the Dyno and get her dialed in just right.
Big thanks to Matt@FSP for being available to me on a Sunday to diag my issue!
Big thanks to Matt@FSP for being available to me on a Sunday to diag my issue!
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Surprisingly the car is still driving pretty decent. Since the crack is a hairline crack, its not arc'ing out and causing issues at low RPM's. I think that's how I didn't notice..
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
that's the plan as soon as I get the new plugs in and have Matt check over the tune on the dyno. I think I should have him this time... specially knowing that I was dead even with him and I was running on 7 cylinders! LOL
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Pro
Joined: Nov 2014
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From: Fort Worth Texas
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Stay tuned!
Ant