TSE EFR NB2 Build Thread
#1342
Cpt. Slow
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,206
Total Cats: 1,139
Just finished welding turbos onto a 570s GT4. Mclaren shipped them tacked on 4 corners and a small weld along two edges, but they sent out a bulletin recommending removing and fully welding the circumference after grinding a decent chamfer. They even called out an Inconel welding rod, fancy.
Just goes to show, we're not the only ones dealing with this turbo issues. A lot of OE turbos are one piece from the factory now for a reason.
Just goes to show, we're not the only ones dealing with this turbo issues. A lot of OE turbos are one piece from the factory now for a reason.
#1343
Watch me bring my welder to the next race weekend. Ill weld the bitch on the spot of it wants to be difficult.
Speaking of racing. I went to a "spur of the moment" time attack event at a smokey Thunderhill. Secured a 2nd place podium even though the car is kinda in shambles. Cool.
I ditched the stage 8 junk and used home depot racing lock nuts on the top 2 turbo studs with mass amounts of resbond to lock it in. Seemed to work pretty well. Knock on wood it stays like this.
Luckily for me the car started to break up 1st or 2nd session out. It was very weird. The car was fine until it wasn't, then the car would misfire so bad I could barely limp it around the track. Restarting the car seemed to fix the issue for a little then it would come back. I think it's the coils. They are original and have never been changed. So I'll try that and hope it fixes it.
Speaking of racing. I went to a "spur of the moment" time attack event at a smokey Thunderhill. Secured a 2nd place podium even though the car is kinda in shambles. Cool.
I ditched the stage 8 junk and used home depot racing lock nuts on the top 2 turbo studs with mass amounts of resbond to lock it in. Seemed to work pretty well. Knock on wood it stays like this.
Luckily for me the car started to break up 1st or 2nd session out. It was very weird. The car was fine until it wasn't, then the car would misfire so bad I could barely limp it around the track. Restarting the car seemed to fix the issue for a little then it would come back. I think it's the coils. They are original and have never been changed. So I'll try that and hope it fixes it.
Last edited by icantlearn; 08-24-2021 at 02:12 PM.
#1345
Swapped coil packs today. Did nothing. I did start to notice that it "initiates" the misfiring once rpm dips low enough. I was ripping through the gears trying to put heat into it and as soon as I came to a stop/idle the car took a ****. I guess ill have to take a log and see what I can find.
#1346
SADFab Destructive Testing Engineer
iTrader: (5)
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
2 things
1. When it's misfiring start pulling plug connections. See if you can pinpoint a cylinder.
2. Start ******* with all the harnesses. Bend them, move them around, look for a loose connection. The motor vibrates a lot more at lower rpm.
1. When it's misfiring start pulling plug connections. See if you can pinpoint a cylinder.
2. Start ******* with all the harnesses. Bend them, move them around, look for a loose connection. The motor vibrates a lot more at lower rpm.
#1353
Pulling plug wires makes the car run even worse. So it has me thinking this is an ECU/Tune issue and not a hardware issue. Remember it goes away once I restart the car every time. I'm fairly confident this isn't an issue mechanically.
Here are some logs. The first one is the car running like **** right off bat. The second one is me revving it a bit, letting it idle, and then it going to **** (so you can see the transition).
bad mis 1.mlg
good to bad mis.mlg
Here are some logs. The first one is the car running like **** right off bat. The second one is me revving it a bit, letting it idle, and then it going to **** (so you can see the transition).
bad mis 1.mlg
good to bad mis.mlg
#1360
Cpt. Slow
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,206
Total Cats: 1,139
Probably the fallback/sensor failure mode. If you're using the GM sensor, looks like it should be at 150hz. If it's still at 50hz, it'll send a "bad" signal, causing MS to fallback to +63%.