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Got a new best but not happy with it. How can I not be happy with a 10.50? The car should have went 10.3x @ 130 but I had a random limiter come on...and then oil pressure dropped on the next pass . 175 shot with a 1 second ramp and spraying through the shifts. I didn't realize how sticky the track was and should have went .5 second ramp or none. Hard to believe the 4l60e outlasted the motor lol.
So this "random limiter". 1-2 shifts at 6400, 2-3 shifts at 6400, and then there's a limiter at 6200 in 3rd? It should have just revved out, but I rode the limiter across the finish. I had this happen last year and simply reflashing the cal got rid of the limiter. So I do the same. Car leaves lazy, feels down on power, but no limiter in 3rd this time and I run a 10.85 @ 124. I slow down to turn on the return road and oil pressure bottoms out and pops up to 10psi. Load up and called it a day.
Unload the car the next day and I don't hear any knocking, it has 40psi cold, so I park it and check the oil filter. It's full of bearing material. I picked up an 04 ls1 from a gto that snapped a valve so i'm going to swap my stuff over to it, but probably sell the nitrous and grab a bigger cam for 10s all motor and run that way for a while. Probably shouldn't be running this fast without the proper safety equipment anyway.
I scanned the car and find an o2 sensor code. I have mine turned off because I run leaded race gas for the track, but I don't have all of the dtc's turned off. My assumption is that when I reflash the car, the code is reset and the limiter disappears until code pops up again. I never had this problem until I disabled the o2's. I have since disabled all o2 sensor dtc's, but obviously can't confirm it's gone until I get another motor in it.
Well congrats on the the pass man but sorry to hear about the engine failure. What heads are your running now and what can do you think you might put in?
Well congrats on the the pass man but sorry to hear about the engine failure. What heads are your running now and what can do you think you might put in?
799s that I cleaned up and removed the rocker bosses. I haven't narrowed a cam down but it will be mid 230s duration. I've looked at the MS3, Torquer, summit stage 3 and 4, Tick SNS 3, etc. I only need 20hp to run tens. I've only made one pass on this setup all motor and it did 11.14 @ 119.5.
Fastlt1: 799 heads, sloppy stage 2 cam (Elgin e1840p), ls6 intake, ported throttle body, gtp injectors, SD tuned by me, yank ss4000, transgo hd2, sonnax hd 2-3 shift valve, 8.8 rear with 3.73, strange SA shocks in the back.
Kcutty85:. I wouldn't call it a build. More like throw good parts from 2 motors together and hope it doesn't shake itself apart lol
I plan on changing over to an SD tune this winter.
Would you mind sharing your tune? I'd be curious to see far or close to mine it is since we have similar set ups.
I plan on changing over to an SD tune this winter.
Would you mind sharing your tune? I'd be curious to see far or close to mine it is since we have similar set ups.
Man hate that happened to your engine. Do you feel your air/fuel meter is displaying correctly during your 10.50 run?
N2
Yes. It's fat. First pass in over a year and first pass on 175 jet. I don't necessarily feel that the jetting was terrible, but it was 45* out and I was in higher kpa cells that I haven't tuned. So a safe recommended jetting combined with rich VE made it richer than I'd like.
Yes. It's fat. First pass in over a year and first pass on 175 jet. I don't necessarily feel that the jetting was terrible, but it was 45* out and I was in higher kpa cells that I haven't tuned. So a safe recommended jetting combined with rich VE made it richer than I'd like.
OK, glad to know you knew the tune was off and sent it anyway. Sometimes it is hard to let out and save it for another pass. Good luck on getting the engines changed out without too much headaches.
OK, glad to know you knew the tune was off and sent it anyway. Sometimes it is hard to let out and save it for another pass. Good luck on getting the engines changed out without too much headaches.
N2
With over 100 cars there, I figured I was only going to get 1 or 2 passes so I sent it. Next pass came 3 hours later.
So no one mentioned that HE RODE THE LIMITER though the traps. ON THE NITROUS? Then you damaged the motor. I guess you didnt know the factory limiter cuts fuel. NOT GOOD when you are injecting nitrous and fuel. I'm not surprised at all that you you damaged the motor. I'd be more surprised if you didnt. Live and learn kind of thing I guess. If anything goes wrong on any pass i'm making, my foot lets off. If I see anything above 12.1 afr on my gauge, thats in my face...I let off.
So no one mentioned that HE RODE THE LIMITER though the traps. ON THE NITROUS? Then you damaged the motor. I guess you didnt know the factory limiter cuts fuel. NOT GOOD when you are injecting nitrous and fuel. I'm not surprised at all that you you damaged the motor. I'd be more surprised if you didnt. Live and learn kind of thing I guess. If anything goes wrong on any pass i'm making, my foot lets off. If I see anything above 12.1 afr on my gauge, thats in my face...I let off.
I agree with you and I know. I have the factory limiter set to 8,000. Using the lnc2000 as the limiter @ 6800 to cut spark. Running it out on whatever this limiter is that came up at 6200 in 3rd was my decision and was basically out of frustration. I've posted on several tuning pages about the limiter and no one knows. The last oil change didn't look good so I figured wth...just a fun car. It can sit for a while. Wait all year to go to the track, think it's all figured out, and then it happens again drives me nuts. Cost me a motor. Live and learn.
I agree with you and I know. I have the factory limiter set to 8,000. Using the lnc2000 as the limiter @ 6800 to cut spark. Running it out on whatever this limiter is that came up at 6200 in 3rd was my decision and was basically out of frustration. I've posted on several tuning pages about the limiter and no one knows. The last oil change didn't look good so I figured wth...just a fun car. It can sit for a while. Wait all year to go to the track, think it's all figured out, and then it happens again drives me nuts. Cost me a motor. Live and learn.
Yes the LNC cuts spark, but I suspect it was something cutting fuel because it worked fine for a while after reflashing it.....which SHOULDN'T have anything to do with the LNC. I suspect it was cutting fuel, which of course you know is bad bad bad for nitrous. But it does suck to break something.
I was just explaining my setup. I know it has nothing to do with the LNC.
Update:. Spun #1 and #2 rod bearings. The other rod bearings showed wear in the center of the top and bottom halves which leads me to believe they were being hammered on while on the low limiter with nitrous spraying. So I'll just swap the other crank in, swap 2 pistons onto rods, new bearings, and button it up.
Quick update. I have the shortblock back together and in the car:
I found hot spots inside the oil pump and some stuff in the pickup screen not related to bearing failure . I found another thread where a member had the same thing with the pump and also spun 1 and 2 rod bearing. Makes me think I had an oiling issue? Installed a Melling 10295.
Next I'm going to pull my valve springs so I can sell them with the sloppy stage 2 and grab some btr duals for the summit stage 3 I put in.
10-22-2019, 11:03 PM
10.50 @ 125 
. 175 shot with a 1 second ramp and spraying through the shifts. I didn't realize how sticky the track was and should have went .5 second ramp or none. Hard to believe the 4l60e outlasted the motor lol.
