ZL1 Questions - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Taylorh1077 · 06-13-2019, 02:03 PM

Hey Guys! So here is the current mods.

-Upper
-Lingenfelter lower
-Rotofab intake
-Kooks Headers
-MSD plug wires
-ARP head bolts
-Cam
-Unknown Injector
-Ported Heads
-Magnaflow Exhuast
-High flow cats

-Currently has 22 degrees of timing.
PE is set to 11s.
-Vehicle is cammed but has factory
idle timing. ( not a huge deal, but it is
audibly unstable on idle just ever so
slightly.
-LTFTs are turned off and saw up to
16% corrections in the short terms.
-Maximum knock retard tables are
zeroed out
-Spar Plugs about 27 on gap
-Leans out past 6k
-noticed black smoke out of the
exhaust while it was on the dyno
- Vehicle is trying to knock retard but
is limited to 3-4 degrees.

Im wondering what will cause this to lean out at 6k? need a bigger pump? I can not for the life of me find out what size injector are but on this thing. Its A6 by the way.

I get a little sputter when around 2200 RPM in each gear besides first...what could cause this?

Any other thoughts would be greatly appreciated...Dyno attached to this thread.
Are there any other changes yall would make?

Juiced1 · 06-13-2019, 02:28 PM

What duty cycle are your injectors at? Your fuel pump could be maxed out as well. I would recommend upgrading your fuel pump at that power level if its still stock.

Black smoke means your running rich but at 11:1 afr that sounds right.

RobZL1 · 06-13-2019, 03:00 PM

Got a log? Or the tune file?

Taylorh1077 · 06-13-2019, 03:13 PM

Quote:

Originally Posted by RobZL1

Got a log? Or the tune file?

Yes, but it wont let me attach them here says "invalid file type"they are HPT and HPL file types

ZMEnow · 06-13-2019, 03:28 PM

Not sure which plugs you are running but if they are the NGK Iridium IX Spark Plugs TR7IX, those are gapped at .40. At .27 the plug would never get hot enough to burn the full in the cylinder..

RobZL1 · 06-13-2019, 04:49 PM

I agree, but a lot of people run them at .030 and below.

Taylorh1077 · 06-13-2019, 05:03 PM

This is the plug im running

RobZL1 · 06-13-2019, 07:28 PM

0.027 is a really tight gap for a TR8IX. That's one heat range colder than most of us run. You can certainly run it if you have a ton of cylinder pressure (what pulleys and which cam? How much boost?) I'd gap it out to at least 0.033-0.035 if it were me. I'm at 0.039" with 7ix's at 12.5-13psi, and was at 0.039" at 15 psi before the cam, too, FWIW.

Taylorh1077 · 06-14-2019, 09:06 AM

Here are the pressures, Im running a BTR stage 3 cam. about 15psi of boost.

RobZL1 · 06-14-2019, 09:29 AM

So sorry! I meant when you are under WOT, full boost, how much heat and pressure are you cramming into those cylinders? Measurement not required- just boost level and pulley combo would give us a good idea. If you're under 15 psi, I'd run the 7-range. I'd only personally consider the 8-range if you are higher than that. With a BTR-3, unless you're running a crazy pulley ratio, you don't really need the 8's. Just based on the 22 degrees of timing and knock retard, I'd say you are squarely in the 7ix zone. You can run the 8's though- some people do. I'd just gap it out more to try to get the spark a little hotter if you keep using them. A bigger gap on the 8's or a change to 7's could also help with idle quality, in my opinion (though a BTR-3 shouldn't pose a ton of idle issues).

Of course all of this is just one guy's opinion, so take it with a grain of salt!

Taylorh1077 · 06-14-2019, 09:32 AM

Quote:

Originally Posted by RobZL1

So sorry! I meant when you are under WOT, full boost, how much heat and pressure are you cramming into those cylinders? Measurement not required- just boost level and pulley combo would give us a good idea. If you're under 15 psi, I'd run the 7-range. I'd only personally consider the 8-range if you are higher than that. With a BTR-3, unless you're running a crazy pulley ratio, you don't really need the 8's. Just based on the 22 degrees of timing and knock retard, I'd say you are squarely in the 7ix zone. You can run the 8's though- some people do. I'd just gap it out more to try to get the spark a little hotter if you keep using them. A bigger gap on the 8's or a change to 7's could also help with idle quality, in my opinion (though a BTR-3 shouldn't pose a ton of idle issues).

Of course all of this is just one guy's opinion, so take it with a grain of salt!

Ive got the ling 2.55 up and 10% lower
My boost gage pegs out on 15 so would need to snag a obd2 scanner and see what i really get up to

Crash76 · 06-14-2019, 11:31 AM

Unknown injector? Did you pick up this car used? I see nothing mentioned about the fuel system ... there is no way you are going to maintain fuel pressure on stock pump w/o a booster with those mods and you should have at least id850s in there... my stock inj were running wide open with a 5% pulley

You need to get a good tune in that veh, you say its knocking but limited to 3-4 degrees, what if it needs more to keep the car safe...

There is a lot that needs addressed... hope you get it figured out ! Good luck

Like others have said, you def dont need 8s

RobZL1 · 06-14-2019, 04:25 PM

Quote:

Originally Posted by Taylorh1077

Ive got the ling 2.55 up and 10% lower
My boost gage pegs out on 15 so would need to snag a obd2 scanner and see what i really get up to

With the 8.66/2.55 and a BTR-3, you are probably at about 13 psi. The gauge in the console isn't really accurate, if that's the one you're referring to.

Quote:

Originally Posted by Crash76

Unknown injector? Did you pick up this car used? I see nothing mentioned about the fuel system ... there is no way you are going to maintain fuel pressure on stock pump w/o a booster with those mods and you should have at least id850s in there... my stock inj were running wide open with a 5% pulley

You need to get a good tune in that veh, you say its knocking but limited to 3-4 degrees, what if it needs more to keep the car safe...

There is a lot that needs addressed... hope you get it figured out ! Good luck

Like others have said, you def dont need 8s

I agree with all of what Crash has to say here. Feel free to PM the tune and log files to me. I'd be glad to take a look at them. If you can't attach them in PM, I'll send you my email. (You might be able to change the file extension to something acceptable to get it to attach, and then I can change them back to .hpt / .hpl)

Taylorh1077 · 06-14-2019, 09:28 PM

Sent you a
PM Rob, Crash, There are not marking on the injectors, they were but in by the previous owner, they are not stock that is the only thing i know for sure about them...Id like to test the duty cycle for sure before go drop a grand on some id1050's..at which point i would need a dual fuel pump im guessing.

06-13-2019, 02:03 PM	#1
Taylorh1077 Drives: 2014 ZL1 Join Date: Feb 2018 Location: Bentonville, AR Posts: 41 View My Garage	ZL1 Questions Hey Guys! So here is the current mods. -Upper -Lingenfelter lower -Rotofab intake -Kooks Headers -MSD plug wires -ARP head bolts -Cam -Unknown Injector -Ported Heads -Magnaflow Exhuast -High flow cats -Currently has 22 degrees of timing. PE is set to 11s. -Vehicle is cammed but has factory idle timing. ( not a huge deal, but it is audibly unstable on idle just ever so slightly. -LTFTs are turned off and saw up to 16% corrections in the short terms. -Maximum knock retard tables are zeroed out -Spar Plugs about 27 on gap -Leans out past 6k -noticed black smoke out of the exhaust while it was on the dyno - Vehicle is trying to knock retard but is limited to 3-4 degrees. Im wondering what will cause this to lean out at 6k? need a bigger pump? I can not for the life of me find out what size injector are but on this thing. Its A6 by the way. I get a little sputter when around 2200 RPM in each gear besides first...what could cause this? Any other thoughts would be greatly appreciated...Dyno attached to this thread. Are there any other changes yall would make? Attached Images

06-13-2019, 03:00 PM	#3
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,775	Got a log? Or the tune file? __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp // CSP LT's & Ultra Cats // JMS // Elite Ultra CC // BMR MM // BC Forged KL13 Mods being installed- oil pump, cam, ported heads, dual in-tank, Goliath and XDI, etc., etc.

06-13-2019, 04:49 PM	#6
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,775	I agree, but a lot of people run them at .030 and below. __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp // CSP LT's & Ultra Cats // JMS // Elite Ultra CC // BMR MM // BC Forged KL13 Mods being installed- oil pump, cam, ported heads, dual in-tank, Goliath and XDI, etc., etc.

06-13-2019, 05:03 PM	#7
Taylorh1077 Drives: 2014 ZL1 Join Date: Feb 2018 Location: Bentonville, AR Posts: 41 View My Garage	This is the plug im running Attached Images

06-13-2019, 07:28 PM	#8
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,775	0.027 is a really tight gap for a TR8IX. That's one heat range colder than most of us run. You can certainly run it if you have a ton of cylinder pressure (what pulleys and which cam? How much boost?) I'd gap it out to at least 0.033-0.035 if it were me. I'm at 0.039" with 7ix's at 12.5-13psi, and was at 0.039" at 15 psi before the cam, too, FWIW. __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp // CSP LT's & Ultra Cats // JMS // Elite Ultra CC // BMR MM // BC Forged KL13 Mods being installed- oil pump, cam, ported heads, dual in-tank, Goliath and XDI, etc., etc.

06-13-2019, 02:28 PM	#2
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,648	What duty cycle are your injectors at? Your fuel pump could be maxed out as well. I would recommend upgrading your fuel pump at that power level if its still stock. Black smoke means your running rich but at 11:1 afr that sounds right.

06-13-2019, 03:28 PM	#5
ZMEnow Drives: ZL1, 2013, tri-coat-red, manual Join Date: Nov 2013 Location: Michigan Posts: 1,662	Not sure which plugs you are running but if they are the NGK Iridium IX Spark Plugs TR7IX, those are gapped at .40. At .27 the plug would never get hot enough to burn the full in the cylinder..

06-14-2019, 09:06 AM	#9
Taylorh1077 Drives: 2014 ZL1 Join Date: Feb 2018 Location: Bentonville, AR Posts: 41 View My Garage	Cylinder presures Here are the pressures, Im running a BTR stage 3 cam. about 15psi of boost. Attached Images

06-14-2019, 09:29 AM	#10
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,775	So sorry! I meant when you are under WOT, full boost, how much heat and pressure are you cramming into those cylinders? Measurement not required- just boost level and pulley combo would give us a good idea. If you're under 15 psi, I'd run the 7-range. I'd only personally consider the 8-range if you are higher than that. With a BTR-3, unless you're running a crazy pulley ratio, you don't really need the 8's. Just based on the 22 degrees of timing and knock retard, I'd say you are squarely in the 7ix zone. You can run the 8's though- some people do. I'd just gap it out more to try to get the spark a little hotter if you keep using them. A bigger gap on the 8's or a change to 7's could also help with idle quality, in my opinion (though a BTR-3 shouldn't pose a ton of idle issues). Of course all of this is just one guy's opinion, so take it with a grain of salt! __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp // CSP LT's & Ultra Cats // JMS // Elite Ultra CC // BMR MM // BC Forged KL13 Mods being installed- oil pump, cam, ported heads, dual in-tank, Goliath and XDI, etc., etc.

06-14-2019, 11:31 AM	#12
Crash76 Team 913 Drives: '14 ZL1, '15 Jeep GC, ‘22 Ram 2500 Join Date: Apr 2015 Location: USA, Central CA Posts: 1,119	Unknown injector? Did you pick up this car used? I see nothing mentioned about the fuel system ... there is no way you are going to maintain fuel pressure on stock pump w/o a booster with those mods and you should have at least id850s in there... my stock inj were running wide open with a 5% pulley You need to get a good tune in that veh, you say its knocking but limited to 3-4 degrees, what if it needs more to keep the car safe... There is a lot that needs addressed... hope you get it figured out ! Good luck Like others have said, you def dont need 8s

06-14-2019, 09:28 PM	#14
Taylorh1077 Drives: 2014 ZL1 Join Date: Feb 2018 Location: Bentonville, AR Posts: 41 View My Garage	Sent you a PM Rob, Crash, There are not marking on the injectors, they were but in by the previous owner, they are not stock that is the only thing i know for sure about them...Id like to test the duty cycle for sure before go drop a grand on some id1050's..at which point i would need a dual fuel pump im guessing.