Drag Visit: Got a Dud... - Page 4

Boost Creep · 11-16-2018, 09:20 AM

Post showing dyno results missing, with engine putting out 350 hp first run then dropping off each consecutive run with the lowest at 300 hp.

Car way down on power compared other 6th gen Camaros.

Tim M · 11-16-2018, 08:51 PM

You are right...I'm late.

I can't explain the full lean AFR unless...we stuck the AFR probe into the muffled flow noting that the valve equipped tube didn't always flow. I wonder if the muffled flow pipe had a reverse flow when the valve equipped tube opened up...due to a siphon effect? An engine will run pretty poorly (if at all) if the AFR was off the scale (sensor limitation), no? I do note a dip in the curves during the AFR full lean, but likely not to the degree I would have expected. Comments?

Took it to the dealer and presented my case - no codes stored (they checked) so hands are tied to be able to fix.

I did learn that the cold air intake is not factory installed...but dealer installed. The did confirm the tune was correct for the intake.

I will look at the MAF orientation. I'm still pursuing an OEM non-cold air box setup-can't see that being the issue though...50+ HP loss?

Boost Creep · 11-16-2018, 09:01 PM

From shopchevypartsdotcom:

Your intake pic:

I don't know what the instructions say, or if MAF clocking matters, but they do appear different.

I still think it might be a cat as the loss gets progressively worse each pull like something clogging up, where MAF miss alignment wouldn't seem to be progressive but more random.

Just my thoughts.

Boost Creep · 11-16-2018, 09:02 PM

Looking again at the two pics.
Is your MAF installed backwards?

biker2k · 11-16-2018, 09:07 PM

looks that way

Dave-ROR · 11-16-2018, 09:38 PM

Quote:

Originally Posted by Boost Creep

Looking again at the two pics.
Is your MAF installed backwards?

I just checked my car (which is completely stock) and my MAF is installed the same direction as Tim's.

I wonder if there was some change between the years and the wiring harness was changed?

LS3JM · 11-17-2018, 10:27 AM

My 2 cents. Put the stock stock air box on. Re-dyno car. I think the performance air box is the issue either incorrectly installed or just gives no gain just loss.

Dave-ROR · 11-17-2018, 01:27 PM

Quote:

Originally Posted by LS3JM

My 2 cents. Put the stock stock air box on. Re-dyno car. I think the performance air box is the issue either incorrectly installed or just gives no gain just loss.

We are going to dyno my car at the same shop to compare. It could very well be the intake, but I really don't see the intake losing 50-100whp without something being very seriously wrong with it. I wouldn't even mind quickly swapping intakes if the shop would allow it. The dealers salesman also has an SS 1LE with the intake and he's likely willing to dyno it as well to comparison.

As for a stock airbox on his car, I don't think he got the intake with the car. The selling dealer sold the car with the intake and likely tossed the stock one in the trash. I know he was trying to source a stock one. The dealer helping to troubleshoot it might have a car coming in soon with the performance intake and if so they plan to keep the stock intake for testing on his car.

arpad_m · 11-17-2018, 04:09 PM

Quote:

Originally Posted by Dave-ROR

As for a stock airbox on his car, I don't think he got the intake with the car. The selling dealer sold the car with the intake and likely tossed the stock one in the trash. I know he was trying to source a stock one. The dealer helping to troubleshoot it might have a car coming in soon with the performance intake and if so they plan to keep the stock intake for testing on his car.

I originally bought the GM CAI and the dealer put the stock airbox with all parts in the trunk for me. It's the customer's property and the dealer is not supposed to just dump it.

(Since then I've gotten the Roto-Fab and now have 2 intakes sitting in the basement, nicely packaged up, oh well.)

Tim M · 11-17-2018, 04:11 PM

So was a bit excited after reading the MAF orientation...woke up at 0545 on a Saturday to explore!

Some images:

Original as purchased alignment:

Dissection - MAF removal...appears correct:

Tube orientation...appears correct (ie not flipped end for end):

If one tried to install the MAF sensor backwards...the screws/bosses do not line up - unable. Also note the MAF connector damage (not by me!)...don't believe it to be an issue:

Updated installation dot to dot orientation...much closer to 10 o'clock:

Updated install overhead:

I disconnected the battery during this to refresh the computer (if this one does that) and took for a short drive.

Cautiously, I would say the car is smoother at low RPM (a complaint of mine) and it now performs the no-lift shifts as one expected. I can't say it worked prior (have no reason why now...). Unfortunately, my backside is not calibrated, but it does not seem to be a 12.5 second car still.

As Dave (thanks!) mentioned, we will hopefully get a couple of 1LE's on the same dyno for a comparison.

Appreciate all the assistance on this odd deal. Very impressed with the car otherwise!

Scargoes · 11-17-2018, 06:29 PM

They damaged that connector during the intake install? I'd be suspect of that. makes me think that maybe the MAF could have been damaged too. A pinched wire could easily cause the intermittent problem as well as degrading performance as the vehicle gets hot. A bad performing MAF would give you the power loss also. I would focus the investigation more on the harness and MAF. Once that can be ruled out, start looking in other areas.

Whocares05050 · 11-17-2018, 06:30 PM

I live about 3 hours south east of tampa or i would happily throw my stock 1LE on the dyno for comparison.

LS3JM · 11-18-2018, 10:37 AM

Quote:

Originally Posted by Scargoes

They damaged that connector during the intake install? I'd be suspect of that. makes me think that maybe the MAF could have been damaged too. A pinched wire could easily cause the intermittent problem as well as degrading performance as the vehicle gets hot. A bad performing MAF would give you the power loss also. I would focus the investigation more on the harness and MAF. Once that can be ruled out, start looking in other areas.

This is a good point. In the picture looks like just the plastic cover is damaged? If the wiring is damaged could be the smoking gun.

Tim M · 11-18-2018, 04:38 PM

I will look at the connector closer, but doubt the wiring is damaged. If a wire is defective, I would fully expect the CE light to illuminate promptly. Only CE light I've gotten is after 10+ mins on road course and after the engine loses power/misses excessively...then it will come on the next lap. The code is misfire randomly all cylinders.

When I pulled the intake apart, I was really hoping to find a rag stuffed inside when they were doing the change at the dealer...this would be much closer to what I feel...just not much poke! No such luck.

11-16-2018, 09:20 AM	#43
Boost Creep Drives: '18 1SS 1LE Join Date: Sep 2017 Location: Pennsyltucky Posts: 2,571	Post showing dyno results missing, with engine putting out 350 hp first run then dropping off each consecutive run with the lowest at 300 hp. Car way down on power compared other 6th gen Camaros. __________________ '18 1SS *1LE* Black, PDR

11-16-2018, 09:01 PM	#45
Boost Creep Drives: '18 1SS 1LE Join Date: Sep 2017 Location: Pennsyltucky Posts: 2,571	From shopchevypartsdotcom: Your intake pic: I don't know what the instructions say, or if MAF clocking matters, but they do appear different. I still think it might be a cat as the loss gets progressively worse each pull like something clogging up, where MAF miss alignment wouldn't seem to be progressive but more random. Just my thoughts. __________________ '18 1SS *1LE* Black, PDR

11-16-2018, 09:02 PM	#46
Boost Creep Drives: '18 1SS 1LE Join Date: Sep 2017 Location: Pennsyltucky Posts: 2,571	Looking again at the two pics. Is your MAF installed backwards? __________________ '18 1SS *1LE* Black, PDR

11-17-2018, 04:11 PM	#52
Tim M Drives: 2018 Camaro SS 1LE Join Date: Jul 2018 Location: Stuttgart, Germany Posts: 807	So was a bit excited after reading the MAF orientation...woke up at 0545 on a Saturday to explore! Some images: Original as purchased alignment: Dissection - MAF removal...appears correct: Tube orientation...appears correct (ie not flipped end for end): If one tried to install the MAF sensor backwards...the screws/bosses do not line up - unable. Also note the MAF connector damage (not by me!)...don't believe it to be an issue: Updated installation dot to dot orientation...much closer to 10 o'clock: Updated install overhead: I disconnected the battery during this to refresh the computer (if this one does that) and took for a short drive. Cautiously, I would say the car is smoother at low RPM (a complaint of mine) and it now performs the no-lift shifts as one expected. I can't say it worked prior (have no reason why now...). Unfortunately, my backside is not calibrated, but it does not seem to be a 12.5 second car still. As Dave (thanks!) mentioned, we will hopefully get a couple of 1LE's on the same dyno for a comparison. Appreciate all the assistance on this odd deal. Very impressed with the car otherwise! Last edited by Tim M; 11-17-2018 at 06:02 PM.

11-17-2018, 06:29 PM	#53
Scargoes Drives: 2018 Hyper Blue 2SS 1LE Join Date: Aug 2018 Location: Dessert Posts: 486	They damaged that connector during the intake install? I'd be suspect of that. makes me think that maybe the MAF could have been damaged too. A pinched wire could easily cause the intermittent problem as well as degrading performance as the vehicle gets hot. A bad performing MAF would give you the power loss also. I would focus the investigation more on the harness and MAF. Once that can be ruled out, start looking in other areas. __________________ 2018 Hyper Blue Metallic 2SS 1LE with Nav, PDR, and track alignment 1:34.20 Willow Springs Big Track

11-16-2018, 08:51 PM	#44
Tim M Drives: 2018 Camaro SS 1LE Join Date: Jul 2018 Location: Stuttgart, Germany Posts: 807	You are right...I'm late. I can't explain the full lean AFR unless...we stuck the AFR probe into the muffled flow noting that the valve equipped tube didn't always flow. I wonder if the muffled flow pipe had a reverse flow when the valve equipped tube opened up...due to a siphon effect? An engine will run pretty poorly (if at all) if the AFR was off the scale (sensor limitation), no? I do note a dip in the curves during the AFR full lean, but likely not to the degree I would have expected. Comments? Took it to the dealer and presented my case - no codes stored (they checked) so hands are tied to be able to fix. I did learn that the cold air intake is not factory installed...but dealer installed. The did confirm the tune was correct for the intake. I will look at the MAF orientation. I'm still pursuing an OEM non-cold air box setup-can't see that being the issue though...50+ HP loss?

11-16-2018, 09:07 PM	#47
biker2k Drives: 2018 2ss 1le Join Date: Jan 2018 Location: Huntington, NY Posts: 474	looks that way

11-17-2018, 10:27 AM	#49
LS3JM Drives: 2018 Camaro SS 1LE Join Date: Jun 2015 Location: Pa Posts: 132	My 2 cents. Put the stock stock air box on. Re-dyno car. I think the performance air box is the issue either incorrectly installed or just gives no gain just loss.

11-17-2018, 06:30 PM	#54
Whocares05050 Drives: 2018 Camaro SS 1LE Join Date: Oct 2018 Location: Treasure Coast, FL Posts: 384	I live about 3 hours south east of tampa or i would happily throw my stock 1LE on the dyno for comparison.

11-18-2018, 04:38 PM	#56
Tim M Drives: 2018 Camaro SS 1LE Join Date: Jul 2018 Location: Stuttgart, Germany Posts: 807	I will look at the connector closer, but doubt the wiring is damaged. If a wire is defective, I would fully expect the CE light to illuminate promptly. Only CE light I've gotten is after 10+ mins on road course and after the engine loses power/misses excessively...then it will come on the next lap. The code is misfire randomly all cylinders. When I pulled the intake apart, I was really hoping to find a rag stuffed inside when they were doing the change at the dealer...this would be much closer to what I feel...just not much poke! No such luck.

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