Cylinder 7...going deeper - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Stephen12ZL1 · 07-07-2015, 07:49 AM

Just took off the intake last night to see what type of damage lurks deeper. Tune was possibly too lean part throttle and I was getting some detonation at weird times during my last track outing. To be continued...

Bigtime53 · 07-07-2015, 08:31 AM

O no! Hate to see this. I will be following you to see what has happened.

Stephen12ZL1 · 07-07-2015, 08:45 AM

Probably my fault due to the bone head decision to not run headers. I am sure that made it difficult for my tuner to accurately dial in the fueling at part throttle. Stuff happens, no one to blame.

JTRATX · 07-07-2015, 09:18 AM

Been following your thread. RE: headers, would the stock header restrict airflow with increased air volume from heads/cam and cause tuner not to be able to tune each cylinder bank properly? Not sure I understand the header comment.

Stephen12ZL1 · 07-07-2015, 09:36 AM

Quote:

Originally Posted by JTRATX

Been following your thread. RE: headers, would the stock header restrict airflow with increased air volume from heads/cam and cause tuner not to be able to tune each cylinder bank properly? Not sure I understand the header comment.

Efficient evacuation of the cylinders won't happen as well with the stock manifolds in turn making fueling difficult to tune especially at part throttle. Every cylinder should be more equal flowing and less prone to lean conditions that occur more frequently on cylinder #7. I am sure it has to be due to the increased duration of intake/exhaust events. All this being said, I am purely speculating and making assumptions based on tuner feedback, etc.

Russell James · 07-07-2015, 11:03 AM

Go long tubes and run it pig rich on race gas when tracking it.

I've seen some tuners put a bung or pyro sensor in # 7 pipe to tune off that cylinder.

2SSRS@Gen5diy · 07-07-2015, 11:58 AM

Think you need new valves in that head, and you where to lean in that cylinder.

Stephen12ZL1 · 07-07-2015, 11:58 AM

Quote:

Originally Posted by Russell James

Go long tubes and run it pig rich on race gas when tracking it.

I've seen some tuners put a bung or pyro sensor in # 7 pipe to tune off that cylinder.

great idea! I may have had a tank of crappy gas even though I always run top tier 93. 100 octane would be more appropriate when tracking due to issues like this above.

Quasimofo · 07-07-2015, 04:31 PM

A friend of mine saw your plug pic and said "looks lean, and the tip got soft."

I'm assuming like NJMSP, your local track sells some 100+ octane?

Stephen12ZL1 · 07-07-2015, 04:42 PM

Yes, VIR sells 100 octane. Yeah, the cylinder was obviously very hot to torch the plug like that.

Frans96ss · 07-08-2015, 09:21 AM

Quote:

Originally Posted by Russell James

Go long tubes and run it pig rich on race gas when tracking it.

I've seen some tuners put a bung or pyro sensor in # 7 pipe to tune off that cylinder.

Too rich is just as bad as too lean. He does not need race gas. All he needs is a properly tuned car and it will run its ass of and not break. We have done this setup HUNDREDS of times and never had a single issue on one we tuned.

Quasimofo · 07-08-2015, 03:22 PM

Is there a fuel delivery issue to that cyl? More fuel pressure, bigger rails perhaps??

Stephen12ZL1 · 07-08-2015, 08:23 PM

piston cracked at 9&11 o'clock & cylinder cracked too...damn.

Bizaro · 07-08-2015, 08:25 PM

ouch!!

07-07-2015, 07:49 AM	#1
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	Cylinder 7...going deeper Just took off the intake last night to see what type of damage lurks deeper. Tune was possibly too lean part throttle and I was getting some detonation at weird times during my last track outing. To be continued... Attached Images __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

07-07-2015, 08:45 AM	#3
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	Probably my fault due to the bone head decision to not run headers. I am sure that made it difficult for my tuner to accurately dial in the fueling at part throttle. Stuff happens, no one to blame. __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

07-07-2015, 04:42 PM	#10
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	Yes, VIR sells 100 octane. Yeah, the cylinder was obviously very hot to torch the plug like that. __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

07-08-2015, 08:23 PM	#13
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	piston cracked at 9&11 o'clock & cylinder cracked too...damn. Attached Images __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

07-07-2015, 08:31 AM	#2
Bigtime53 Drives: 2013 ZL1 Join Date: Mar 2013 Location: Oklahoma Posts: 2,298	O no! Hate to see this. I will be following you to see what has happened.

07-07-2015, 09:18 AM	#4
JTRATX Drives: 17 SS 1LE, 14 Yukon Denali Join Date: May 2015 Location: Austin, TX Posts: 355	Been following your thread. RE: headers, would the stock header restrict airflow with increased air volume from heads/cam and cause tuner not to be able to tune each cylinder bank properly? Not sure I understand the header comment.

07-07-2015, 11:03 AM	#6
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	Go long tubes and run it pig rich on race gas when tracking it. I've seen some tuners put a bung or pyro sensor in # 7 pipe to tune off that cylinder.

07-07-2015, 11:58 AM	#7
2SSRS@Gen5diy Drives: 2014 Z/28 #82+#192, 18ZLE 66Nova Join Date: Oct 2008 Location: By the lake in AZ Posts: 15,719 View My Garage	Think you need new valves in that head, and you where to lean in that cylinder.

07-07-2015, 04:31 PM	#9
Quasimofo Drives: 2015 Z/28 Join Date: Jun 2015 Location: Chalfont, PA Posts: 67	A friend of mine saw your plug pic and said "looks lean, and the tip got soft." I'm assuming like NJMSP, your local track sells some 100+ octane?

07-08-2015, 03:22 PM	#12
Quasimofo Drives: 2015 Z/28 Join Date: Jun 2015 Location: Chalfont, PA Posts: 67	Is there a fuel delivery issue to that cyl? More fuel pressure, bigger rails perhaps??

07-08-2015, 08:25 PM	#14
Bizaro Account Suspended Drives: 2015 Redhot 1LE Join Date: Feb 2013 Location: Westchester NY Posts: 1,409	ouch!!