Rebuilt LS1 smoking exhaust after dyno pull
09-25-2015, 06:47 PM
#21
AI does not seal the rocker bolts. I have AI ported heads and I initially forgot to seal the rocker studs but I didn't see any smoke on decel. I had it on the dyno several times before I eventually sealed them. Considering the car hasn't been driven much and and no hard pulls have occured other than the dyno, the rings probably haven't seated themselves yet. Depending on the ring type, that'll lead to some shortlived smoke but not as much as you are seeing. If I were you, once you get the fueling figured out, I'd focus on the PCV system... You can inspect the PCV valve pretty easily. During decel with throttle closed there is still vacume in the intake pulling on the PCV. A stuck open PCV valve can cause a fair amount of smoke on decel. Good luck man, getting these items sorted out is part of the process.
09-25-2015, 09:03 PM
#22
Yeah this performance stuff might not be for me, I was not not blessed with patience. So my brother was drinvig the car to get my AC checked while I'm at work and the car killed and won't start. Could be something as simple as no fuel, but I doubt it I guess I'll tee and find out tomorrow.
09-26-2015, 04:54 PM
#26
So far the car feels really good to drive, throttle response is instant and the car moves really swift and effortlessly at the drop of a dime with little throttle. It doesn't smoke at all, I guess I'll only have that under high RPM events. I can't wait to have all these problems ironed out and the tune dialed in.
09-26-2015, 08:32 PM
#27
TECH Addict
Blowing the fuel pump fuse make me think you have a fuel pump issue. Need to test how many amps the fuel pump is drawling. Could be the wiring leading to the pump is too small a gauge of wire. Or a defective pump, it would not be the first time someone has got a new pump that was defective.
I am planning on being at the Cruisin the Coast on Friday 9th, hope you can make it there. It is a car guy’s paradise.
I am planning on being at the Cruisin the Coast on Friday 9th, hope you can make it there. It is a car guy’s paradise.
09-30-2015, 02:50 PM
#30
So the car died yesterday, wouldn't start back up, all my fuses for the fuel system are intact, and the relay seems to indicate the pump is getting power. I'm going to unplug the fuel line from the filter and turn the key to see if the pump is pushing fuel. Man I don't know what else to check and otherwise the car is scheduled to go back to Futrals on the 19th.
10-01-2015, 08:05 AM
#31
TECH Addict
You really need to get a gauge on there. I had my hose on the fuel pump in the tank come loose and I only had 20 psi. Car would run fine and part throttle was alright but if a stepped on it, it would lose power. Sound like this could be your problem but the best way to find out is with a gauge. Someone must make an adapter for the an fitting for a gauge hookup.
11-07-2015, 09:45 AM
#32
Well the car went back to Futrals and they went over the tune and fixed the timing issues that was causing the detonation. The car made 429.61rwhp 380.61rwtq but the guy told me that the cranking compression was at .200 and that would be associated with a head and cam package problem. Ima tell you I don't understand what that means, and those guys aren't the best communicators. I told Phil at AI this and he sent a reply which I forwarded to Futrals. As far as the smoke I was adv that I would need a catch can.
Last edited by BlackedOut LS1; 11-07-2015 at 01:49 PM.
11-07-2015, 10:31 AM
#33
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Catch can is a good idea anyway. Glad you got it sorted. I guess a dumb question but - what hidden problem with the cam package?
11-07-2015, 03:29 PM
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11-08-2015, 11:27 AM
#37
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I disagree that 200 psi cranking compression is problematic. You're at 11:1 CR, I'm at 11.5. Your cranking 200, I'm cranking 210.
A very large cam would have lower pressure readings, maybe they are expecting larger cam behavior?
11-08-2015, 12:10 PM
#38
That was helpful. Phil was very thorough. I have seen similar things where a dyno jet doesn't load up the engine enough, so you pull timing on the street - especially at high MAP and low to mid rpm.
I disagree that 200 psi cranking compression is problematic. You're at 11:1 CR, I'm at 11.5. Your cranking 200, I'm cranking 210.
A very large cam would have lower pressure readings, maybe they are expecting larger cam behavior?
I disagree that 200 psi cranking compression is problematic. You're at 11:1 CR, I'm at 11.5. Your cranking 200, I'm cranking 210.
A very large cam would have lower pressure readings, maybe they are expecting larger cam behavior?
11-09-2015, 02:04 AM
#39
Detonation seems to be happening right around peak torque.
Cam specs weren't mentioned, but I'd gather it's far from big.
I'd guess you are simply fuel quality limited.
Nothing at all wrong with dropping timing in that area.
Maybe richen the fuel there as well.
My ls1 behaves much the same. I bring the timing back past 5200.
And it likes near 12:1 AF there.
We get 92 octane here in Oregon. CA gets worse...,,
FWIW, my car has tickled the tens. Although it's a C5 vette, so a little lighter.
Put some high octane fuel in. I bet it goes away.
Ron
Cam specs weren't mentioned, but I'd gather it's far from big.
I'd guess you are simply fuel quality limited.
Nothing at all wrong with dropping timing in that area.
Maybe richen the fuel there as well.
My ls1 behaves much the same. I bring the timing back past 5200.
And it likes near 12:1 AF there.
We get 92 octane here in Oregon. CA gets worse...,,
FWIW, my car has tickled the tens. Although it's a C5 vette, so a little lighter.
Put some high octane fuel in. I bet it goes away.
Ron
11-09-2015, 05:58 AM
#40
Detonation seems to be happening right around peak torque.
Cam specs weren't mentioned, but I'd gather it's far from big.
I'd guess you are simply fuel quality limited.
Nothing at all wrong with dropping timing in that area.
Maybe richen the fuel there as well.
My ls1 behaves much the same. I bring the timing back past 5200.
And it likes near 12:1 AF there.
We get 92 octane here in Oregon. CA gets worse...,,
FWIW, my car has tickled the tens. Although it's a C5 vette, so a little lighter.
Put some high octane fuel in. I bet it goes away.
Ron
Cam specs weren't mentioned, but I'd gather it's far from big.
I'd guess you are simply fuel quality limited.
Nothing at all wrong with dropping timing in that area.
Maybe richen the fuel there as well.
My ls1 behaves much the same. I bring the timing back past 5200.
And it likes near 12:1 AF there.
We get 92 octane here in Oregon. CA gets worse...,,
FWIW, my car has tickled the tens. Although it's a C5 vette, so a little lighter.
Put some high octane fuel in. I bet it goes away.
Ron
Here are the cam specs, I believe they fixed the timing/detonation issues. But now they're saying my cranking compression is a problem but I've not heard anything else from them. I only use 92 Octane, does the octane boosters at auto part store work?
