Back in a ZL1 again!!! - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

flipstyledsm22 · 02-13-2022, 02:19 PM

Pulled the trigger on another 2014 and it's shipping down to me from Kansas.

I have a question for anyone that ONLY has the upper pulley done on their ZL1... how does it feel compared to the factory feel? Any complaints?

The ZL1 I bought has an upper pulley and it was tuned for it. Nothing else has been done to it, so I'm curious to know what y'alls experience have been.

Thanks!

flipstyledsm22 · 02-20-2022, 05:18 PM

Does anyone have dyno numbers on just a 2.5 upper pulley mod?

ogdrew · 02-20-2022, 08:15 PM

Quote:

Originally Posted by flipstyledsm22

Does anyone have dyno numbers on just a 2.5 upper pulley mod?

The official LSA Dyno Thread should be of help, it's stickied at the top of the ZL1 specific forums

flipstyledsm22 · 02-21-2022, 12:41 PM

Quote:

Originally Posted by ogdrew

The official LSA Dyno Thread should be of help, it's stickied at the top of the ZL1 specific forums

Read through all 24 pages and didn't see any with just an upper pulley mod.

The car should be in my possession tomorrow, as it still hasn't shipped from Kansas yet... should be on its way down sometime today though.

Anyways, I'm taking it straight to Recoil Racing to have it thoroughly inspected and while it's there, I'll get it on a dyno, so I'll be posting some data soon.

ZMEnow · 02-21-2022, 01:50 PM

Quote:

Originally Posted by flipstyledsm22

Read through all 24 pages and didn't see any with just an upper pulley mod.

The car should be in my possession tomorrow, as it still hasn't shipped from Kansas yet... should be on its way down sometime today though.

Anyways, I'm taking it straight to Recoil Racing to have it thoroughly inspected and while it's there, I'll get it on a dyno, so I'll be posting some data soon.

An 8.66 lower is 10-11% which is max without a tune, plugs, fuel. Since a 2.55 upper is 18% and you noted everything else is stock except the tune, I don’t think you may find any number as that’s an unsafe combination.

flipstyledsm22 · 02-23-2022, 08:22 PM

Quote:

Originally Posted by ZMEnow

An 8.66 lower is 10-11% which is max without a tune, plugs, fuel. Since a 2.55 upper is 18% and you noted everything else is stock except the tune, I don’t think you may find any number as that’s an unsafe combination.

Welp, the car arrived today and first thing I did was pop the hood and looked. Everything looks stock except for the green belt and 2.45 Griptec pulley...

I'm not feeling too good about that mod now that you said it is an unsafe combination. I'm taking it straight to Recoil Racing this weekend and Jerry will dig into it for me. Hopefully the engine wasn't hurt and a miracle tune was put on the car by the previous tuner. I tried like hell to look up the old tuner as well and couldn't find anything on him... someone by the name of John Simpson with JS Performance.

If any of you can validate that shop and/or has that guys number, please let me know.

Thanks,
-Ben-

JBZL1 · 02-27-2022, 01:36 PM

I have headers, off road pipes, Cai, LS3 TB, 2.5 upper, colder plugs, ID850 injectors, ported blower, afco IC. I made 630hp and 650ft lbs to the wheels, it goes pretty good lol
No lower pulley

TIMZ71 · 03-01-2022, 09:12 AM

Congrats on your new to you ZL1 ! Great looking car, ( but im biased LOL)

Do you have a Wideband and tuning software to log and see where your at tune wise?

flipstyledsm22 · 03-08-2022, 08:09 PM

So I got it over to a shop in the area (Aces Performance) and they did a base run to see where the car was at. It made 546 rwhp, but they said at the top of the rpm range it was starting to pull timing and knock. Also the duty cycle was set at well over 100% and was running rich. This was only with the 2.45 Griptec upper and Gates HD belt.

They suggested I open up the exhaust to have better flow, so I let them do that. There's a list of other things I need to add to really level it out, but they said with the better flowing exhaust, he can put a safe tune on it for the time being.

With the better flowing exhaust and safer tune, it made 534 rwhp.

tartagliazl1 · 03-09-2022, 05:21 AM

what did they do to open the exhaust? You lost 12 hp after they opened it. Sounds like you're in need of some injectors and a proper tune.

JB'sZL1 · 03-09-2022, 07:47 AM

Quote:

Originally Posted by flipstyledsm22

This was only with the 2.45 Griptec upper and Gates HD belt.

2.45 is 23% OD and almost 21k.

Yeah. Supporting mods are necessary, and a good tune, or bad things can happen.

JANNETTYRACING · 03-09-2022, 11:29 AM

Quote:

Originally Posted by flipstyledsm22

Welp, the car arrived today and first thing I did was pop the hood and looked. Everything looks stock except for the green belt and 2.45 Griptec pulley...

I'm not feeling too good about that mod now that you said it is an unsafe combination. I'm taking it straight to Recoil Racing this weekend and Jerry will dig into it for me. Hopefully the engine wasn't hurt and a miracle tune was put on the car by the previous tuner. I tried like hell to look up the old tuner as well and couldn't find anything on him... someone by the name of John Simpson with JS Performance.

If any of you can validate that shop and/or has that guys number, please let me know.

Thanks,
-Ben-

You are definitely running a dangerous combination on pump fuel and stock injectors.

Injectors should never exceed 80% duty cycle and a 10% pulley will put it right there. your 23% pulley is pushing the injectors and fuel pressure is dropping hard.

In order to run 18% which is max I recommend on a stock cam you need the following.

Rotofab
18% pulley
Long Tube headers with high flow cats
ID1050x injectors
JMS fuel system voltage booster
Crank Case Breather kit
Catch can
Colder plugs TR7IX
MSD wires
And a very good tune

You will need to be on 91-93 octane to run this combo at full potential.

This is our JRE 125 RWHP package.

Feel free to give me a call to discuss.

Ted.

silversleeper · 03-11-2022, 10:07 AM

It sounds like it still isn't right. A stock NPP exhaust is open enough unless going for much higher hp.
I'd try to fix it better. Either step up to a proper 125hp type package, or a proper 75hp type of package which isn't that hard or expensive.

flipstyledsm22 · 03-11-2022, 07:03 PM

Well it's really for the wife and she doesn't like how the no cats sound, even with resanators on it. I am pulling the pulley off and replacing it with a 3" Griptec. Also putting hi-flow cats back on, tuning it back down, and adding a rotofab.

When she gets bored with it not having enough grunt, I'll revisit the idea of getting a proper 125rwhp kit installed.

02-13-2022, 02:19 PM	#1
flipstyledsm22 Let's go fishing! Drives: a car with 8 cylinders Join Date: Apr 2016 Location: Seabrook, Texas Posts: 1,129 View My Garage	Back in a ZL1 again!!! Pulled the trigger on another 2014 and it's shipping down to me from Kansas. I have a question for anyone that ONLY has the upper pulley done on their ZL1... how does it feel compared to the factory feel? Any complaints? The ZL1 I bought has an upper pulley and it was tuned for it. Nothing else has been done to it, so I'm curious to know what y'alls experience have been. Thanks! __________________ "When choosing between two evils, I always like to try the one I’ve never tried before." Mae West 1892-1980

02-20-2022, 05:18 PM	#2
flipstyledsm22 Let's go fishing! Drives: a car with 8 cylinders Join Date: Apr 2016 Location: Seabrook, Texas Posts: 1,129 View My Garage	Does anyone have dyno numbers on just a 2.5 upper pulley mod? __________________ "When choosing between two evils, I always like to try the one I’ve never tried before." Mae West 1892-1980

02-27-2022, 01:36 PM	#7
JBZL1 Drives: 2012 ZL1 Join Date: Apr 2015 Location: Kitchener ON, Canada Posts: 176	I have headers, off road pipes, Cai, LS3 TB, 2.5 upper, colder plugs, ID850 injectors, ported blower, afco IC. I made 630hp and 650ft lbs to the wheels, it goes pretty good lol No lower pulley __________________ 2012 ZL1 preproduction car #13 ROTO-FAB intake / IC reservoir , 2.85" upper , ported inlet

03-01-2022, 09:12 AM	#8
TIMZ71 Drives: 2013 ZL1 vert Join Date: Jun 2021 Location: OH Posts: 3	Congrats on your new to you ZL1 ! Great looking car, ( but im biased LOL) Do you have a Wideband and tuning software to log and see where your at tune wise? __________________ 2013 ZL1 Convertible Inferno Orange, 710 rwhp tuned by B.E.I.

03-08-2022, 08:09 PM	#9
flipstyledsm22 Let's go fishing! Drives: a car with 8 cylinders Join Date: Apr 2016 Location: Seabrook, Texas Posts: 1,129 View My Garage	So I got it over to a shop in the area (Aces Performance) and they did a base run to see where the car was at. It made 546 rwhp, but they said at the top of the rpm range it was starting to pull timing and knock. Also the duty cycle was set at well over 100% and was running rich. This was only with the 2.45 Griptec upper and Gates HD belt. They suggested I open up the exhaust to have better flow, so I let them do that. There's a list of other things I need to add to really level it out, but they said with the better flowing exhaust, he can put a safe tune on it for the time being. With the better flowing exhaust and safer tune, it made 534 rwhp. Attached Images __________________ "When choosing between two evils, I always like to try the one I’ve never tried before." Mae West 1892-1980

03-09-2022, 05:21 AM	#10
tartagliazl1 Drives: 2013 zl1 vert Join Date: Dec 2018 Location: Rochester, New york Posts: 956	what did they do to open the exhaust? You lost 12 hp after they opened it. Sounds like you're in need of some injectors and a proper tune. __________________ 22% lower/ 2.5 upper/ 2” headers/ cat delete/ x-pipe/ 2 gallon x tank/ 100-3 pump/ fic 850/ dsx aux kit/ 103mm throttle body/ RPM 5” intake/ meth kit/ prometh lid injection/FI interchiller/ 160* stat/ ngk-7/ msd wires/ elite catch can/ tsp cam/ Che trunnions/ ported supercharger/ 1/2” lid spacer/ brick mod/BMR toe and trailing arms/ 751hp 757 tq SAE @17.3lb on a loaded dyno.

03-11-2022, 10:07 AM	#13
silversleeper Big Crow Drives: '13 ZL1 Join Date: Mar 2017 Location: California Posts: 1,487	It sounds like it still isn't right. A stock NPP exhaust is open enough unless going for much higher hp. I'd try to fix it better. Either step up to a proper 125hp type package, or a proper 75hp type of package which isn't that hard or expensive.

03-11-2022, 07:03 PM	#14
flipstyledsm22 Let's go fishing! Drives: a car with 8 cylinders Join Date: Apr 2016 Location: Seabrook, Texas Posts: 1,129 View My Garage	Well it's really for the wife and she doesn't like how the no cats sound, even with resanators on it. I am pulling the pulley off and replacing it with a 3" Griptec. Also putting hi-flow cats back on, tuning it back down, and adding a rotofab. When she gets bored with it not having enough grunt, I'll revisit the idea of getting a proper 125rwhp kit installed. __________________ "When choosing between two evils, I always like to try the one I’ve never tried before." Mae West 1892-1980