Project Land Whale (Silverado Turbo Build)
06-02-2014, 09:15 AM
#103
So I have been dealing with a bit of an issue and wonder if anyone has any thoughts?
If I get on it hard from a dig or a slow (20mph) roll the truck will go hard for a few seconds, build boost then it goes lean (13.4+/-) and break up. It doesn't do this from a high roll (60). From a high roll it will dig down and build boost like normal with a flat 11.0 AFR regardless of if I roll on it slowly or go full throttle.
Another thing I noticed is it stumbles a little on decel to stop signs, etc. The other day it actually died in the middle of a slow turn onto my street.
I am going to change plugs to start, but wondered if this is something anyone else has dealt with?
If I get on it hard from a dig or a slow (20mph) roll the truck will go hard for a few seconds, build boost then it goes lean (13.4+/-) and break up. It doesn't do this from a high roll (60). From a high roll it will dig down and build boost like normal with a flat 11.0 AFR regardless of if I roll on it slowly or go full throttle.
Another thing I noticed is it stumbles a little on decel to stop signs, etc. The other day it actually died in the middle of a slow turn onto my street.
I am going to change plugs to start, but wondered if this is something anyone else has dealt with?
06-17-2014, 11:41 AM
#106
I did a plug change about a week back and put some new fuel in it and one of the two solved the issue. 
Drove the truck a bit, still wanting to crank up the boost a bit. I did run into an issue again last night after driving the truck home, I parked for 20 minutes went to leave again and it won't start. Good voltage, cranks all day long, but won't start. I anticipate somethign basic and will look it over tonight.
I also saw the release of the ON3 7875 turbo and am considering upgrading to that since it should be a direct swap. Just debating how big the gains would be.
Drove the truck a bit, still wanting to crank up the boost a bit. I did run into an issue again last night after driving the truck home, I parked for 20 minutes went to leave again and it won't start. Good voltage, cranks all day long, but won't start. I anticipate somethign basic and will look it over tonight.
I also saw the release of the ON3 7875 turbo and am considering upgrading to that since it should be a direct swap. Just debating how big the gains would be.
09-03-2014, 11:06 AM
#109
I figured I would post some video now that tuning is largely finished. This was a 35mph roll on 18psi peak.
https://www.youtube.com/watch?v=KgGc...ature=youtu.be
https://www.youtube.com/watch?v=KgGc...ature=youtu.be
09-08-2014, 10:48 AM
#110
Well....
We had an event this weekend and I went out to get an 11.99x as my goal. It didn't end well.
I made a total of 7 passes gradually getting faster until I ran a 12.01. At this point the track had gone and my 60' was down almost two tenths. (20" Street Tires)
My final and quickest full pass was:
60' - 2.193
330' - 5.386
1/8 - 7.961 @ 95.77mph
1/4 - 12.017 @ 122.17mph
My best 60' of the night was a couple hours earlier at 2.039. If I could have combined the two, I obviously would have been good.
On the last pass the engine let go right at the end of the track. Smoke everywhere and I lost power. Before I towed it home a quick look shows a hole in the block and I took some pieces of piston out of the hole.
I am going to start tearing it down this week and I have a 4.8L I picked up, but I am done for the season and am going to change some things for next year.
I check my tune log and don't see any tuning reasons why it went. However I was at 20psi (Greedy) and I assume that was all it took. AFR was 11.3 the whole run, ECTs are good, IATs were good, no knock until the engine went.
We had an event this weekend and I went out to get an 11.99x as my goal. It didn't end well.
I made a total of 7 passes gradually getting faster until I ran a 12.01. At this point the track had gone and my 60' was down almost two tenths. (20" Street Tires)
My final and quickest full pass was:
60' - 2.193
330' - 5.386
1/8 - 7.961 @ 95.77mph
1/4 - 12.017 @ 122.17mph
My best 60' of the night was a couple hours earlier at 2.039. If I could have combined the two, I obviously would have been good.
On the last pass the engine let go right at the end of the track. Smoke everywhere and I lost power. Before I towed it home a quick look shows a hole in the block and I took some pieces of piston out of the hole.
I am going to start tearing it down this week and I have a 4.8L I picked up, but I am done for the season and am going to change some things for next year.
I check my tune log and don't see any tuning reasons why it went. However I was at 20psi (Greedy) and I assume that was all it took. AFR was 11.3 the whole run, ECTs are good, IATs were good, no knock until the engine went.
09-12-2014, 10:40 AM
#115
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Sucks that you popped the motor - you're seeing lots of folks doing it lately as pump E85 is losing it's ethanol concentration in preparation for colder weather.
Meth+pump is much safer than E85 and it's seasonal concentration swings. I would advise investing in that. Plus you're not tied to a restrictive distribution network for fuel.
Were you logging it or monitoring KR when it went?
Meth+pump is much safer than E85 and it's seasonal concentration swings. I would advise investing in that. Plus you're not tied to a restrictive distribution network for fuel.
Were you logging it or monitoring KR when it went?
Last edited by 02SOMSS; 09-12-2014 at 10:48 AM.
09-12-2014, 10:54 AM
#116
The E85 in Des Moines tests at E70 all year around now. There are no longer swings in the concentration. Also, it is available all over in Des Moines and very easy to find when traveling the midwest.
E85 > Pump + meth any day of the week. The LQ4 in my Camaro has been going strong for over 2 years with HP levels varying from 600-730+ rwhp and many track and street runs on it. Sometimes it's just time for them to let go.
E85 > Pump + meth any day of the week. The LQ4 in my Camaro has been going strong for over 2 years with HP levels varying from 600-730+ rwhp and many track and street runs on it. Sometimes it's just time for them to let go.
09-12-2014, 11:27 AM
#117
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That's surprising but reassuring to hear that they are maintaing a steady mix now.
It also explains hard starts during the dead of winter.
Are concentrations across the country consistent?
Midwest availability is solid, get out of the grain belt and it's much more inconvenient to track down - Drag Week/HRPT comes to mind.
I have plenty of fuel system but won't run it for that very reason, I fully intend on doing DW in one of my FI hoopties.
Pump +meth/alcohol gives ultimate control over one of the biggest factors in a FI combination - fuel quality.
It also explains hard starts during the dead of winter.
Are concentrations across the country consistent?
Midwest availability is solid, get out of the grain belt and it's much more inconvenient to track down - Drag Week/HRPT comes to mind.
I have plenty of fuel system but won't run it for that very reason, I fully intend on doing DW in one of my FI hoopties.
Pump +meth/alcohol gives ultimate control over one of the biggest factors in a FI combination - fuel quality.
09-12-2014, 02:15 PM
#118
I do not see enough change from e70 to e85 in my tuneups to worry about anything. If it tests out at 85% tune to 10.5:1 and at 70% you will be at about 11:1. We see 70% every fall-spring and 85-87 through the summer. Lots of friends and customers running the stuff with no issues.
09-15-2014, 05:01 PM
#119
I was logging during the run. No knock, ECTs, IATs all fine. 11.3 AFR most of the run.
Got the engine torn down all the way this weekend. I would certainly classify the results as catastrophic. Turns out I destroyed two rods and pistons. Destroyed the crank and about everything I could have. Damaged the heads, dinged up the cam, etc. There were pieces of piston EVERYWHERE. One piston was in a few pieces the other is in literally hundreds. I even managed to destroy my oil pan.
Here is the hole in the block:
Cylinder that had no piston pieces in it:
Connecting Rods:
Piston that wasn't in a billion pieces:
Broken windage tray, also notice the pieces in the oil pickup:
Broken oil pan (Also broken on the flange):
Driver's side cylinder head:
Got the engine torn down all the way this weekend. I would certainly classify the results as catastrophic. Turns out I destroyed two rods and pistons. Destroyed the crank and about everything I could have. Damaged the heads, dinged up the cam, etc. There were pieces of piston EVERYWHERE. One piston was in a few pieces the other is in literally hundreds. I even managed to destroy my oil pan.
Here is the hole in the block:
Cylinder that had no piston pieces in it:
Connecting Rods:
Piston that wasn't in a billion pieces:
Broken windage tray, also notice the pieces in the oil pickup:
Broken oil pan (Also broken on the flange):
Driver's side cylinder head: