Andrewhans
Turbo LS ****poster
- Joined
- Jan 5, 2013
- Location
- NJ near Philly
And the sum bitch blew up again lol. I made the mistake of cleaning the car, changing the oil and prepping the car for a track outting at Fayetteville again. Gonna put up pics soon.
Frustrating part is that I didn't change ANYTHING from the tune that I drive the car everyday. I put almost 1200miles on the engine last month alone beating the daylights out of it with big highway pulls, rolling burnouts and just having a good time. Take it to the track and the first pass off the trailer it goes 10.1@136mph while pedalling twice. The topend felt very weak and after reviewing the datalog I see I was pulling about 3.5 deg of timing due to MAT. Oil pressure was rock solid and perfect. I actually happened to glance at oil pressure in the middle of 3rd gear and was holding steady around 60psi.
Target timing was 14.5 but bc of air temps the engine was seeing only 11deg. 210deg air temps at the top of 3rd, 11.6-11.8 AFR, 21psi boost, 73% content rating. I'm leaning towards a combo of hot air, choked exhaust side and the d585 coils possibly starting to auto discharge. I should have held on to my last set of coils that worked without issue. This set came with the L33 and had almost 140k less miles on it so I figured they would be better to use.
I'm not blaming them but I am suspect of those coils. A good buddy of mine is going to send me a set of "dumb" coils to try and eliminate the chance of it happening again, if that was in fact happening, it's worth the effort to me for sure considering it's a free swap. I'm sending him my d585 coils to use on his wifes budget 4.8 s10. I'm also going to send off my injectors to Erik Derr to get flow tested and cleaned since they have now survived 2 engine failures.
Also have another engine on the way. Managed to find an 08 4.8 non VVT non DOD engine with 209k miles. Gonna leave the rest of the setup the same and step down in cubic inch to hopefully let the turbo work better. I loved my first 4.8 and am going to be excited to run another one.
Figured I'd update you all again lol. Doesn't seem to be many people watching though haha
Frustrating part is that I didn't change ANYTHING from the tune that I drive the car everyday. I put almost 1200miles on the engine last month alone beating the daylights out of it with big highway pulls, rolling burnouts and just having a good time. Take it to the track and the first pass off the trailer it goes 10.1@136mph while pedalling twice. The topend felt very weak and after reviewing the datalog I see I was pulling about 3.5 deg of timing due to MAT. Oil pressure was rock solid and perfect. I actually happened to glance at oil pressure in the middle of 3rd gear and was holding steady around 60psi.
Target timing was 14.5 but bc of air temps the engine was seeing only 11deg. 210deg air temps at the top of 3rd, 11.6-11.8 AFR, 21psi boost, 73% content rating. I'm leaning towards a combo of hot air, choked exhaust side and the d585 coils possibly starting to auto discharge. I should have held on to my last set of coils that worked without issue. This set came with the L33 and had almost 140k less miles on it so I figured they would be better to use.
I'm not blaming them but I am suspect of those coils. A good buddy of mine is going to send me a set of "dumb" coils to try and eliminate the chance of it happening again, if that was in fact happening, it's worth the effort to me for sure considering it's a free swap. I'm sending him my d585 coils to use on his wifes budget 4.8 s10. I'm also going to send off my injectors to Erik Derr to get flow tested and cleaned since they have now survived 2 engine failures.
Also have another engine on the way. Managed to find an 08 4.8 non VVT non DOD engine with 209k miles. Gonna leave the rest of the setup the same and step down in cubic inch to hopefully let the turbo work better. I loved my first 4.8 and am going to be excited to run another one.
Figured I'd update you all again lol. Doesn't seem to be many people watching though haha
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