ZL1 M6 - Headers, Roto-Fab, Upper Pulley 508w?

[Can'tHave2MuchHP]

Yeah the guys above have you on the right track. Definitely it's either in the tune, lack of fuel, and/or cooling. 2.55" with headers is definitely too far IMO and I'd never do it. Go buy a set of ID850s or 1050s and see if it changes anything and even if it doesn't, once you fix the actual problem your car will be safe for afterwards.

By the way on a good dyno and decent temps an M6 ZL1 with your mods should see no less than 580 wheel and should be knocking on the door of 600.

[KaBoom1701]

Originally Posted by Stephen12ZL1

double check to ensure the intercooler circuit is filled and bled properly. Also, make sure the intercooler pump is functioning properly. The IAT2 temperatures were probably soaring causing the timing tables to be retarded. Hope this helps!

Good point.

Start the car and check your inter cooler pump....if it's stops after a few secs from start up you have too much air in the system.

[nighttowl]

2.5 upper with stock balancer pulley is 18% overdrive.
I had a 10% overdrive pulley on my car and the injectors were static (over 100% duty).

[STUNNAH]

Originally Posted by ABADZL1

Not every car responds the same. Stock injectors can run pretty high duty cycles totally stock. It may work in some. But that doesn't make it safe to say it will work for every car. Only data logging will tell. Check this link out. He put on a 2.5 upper only and see what trouble he's having.

https://www.hptuners.com/forum/showt...pulley-upgrade

That thread means nothing...The OP hasn't even changed the upper pulley yet...If anything it indicates that he doesn't know how to use the tuner correctly...

[RedZL1]

Originally Posted by STUNNAH

2.5 upper is ok with no mods to the fueling system...

You're wrong.

It's been well documented in many cases running anything more than 10% lower, stock injectors are maxed out.

[STUNNAH]

Originally Posted by RedZL1

You're wrong.

It's been well documented in many cases running anything more than 10% lower, stock injectors are maxed out.

So that means that Lingenfelter, Vengeance, and other performance shops are wrong as well, and that nobody really knows shit???

http://www.lingenfelter.com/product/L010222012.html

Vengeance Racing
FACTORY SUPERCHARGED
STAGE 1 CAMARO ZL1 Performance Package
645HP
$2,499.99
Roto Fab Cold Air Induction
2.55” Upper Pullley
10 Bolt Supercharger Hub
Solid Isolator
Appropriate serpentine belt
Billet Catch Can with AN Lines/Fittings
VR Valve Cover breather
160* Thermostat
Vengeance Racing High Temperature Protective Heat Sleeves
NGK TR6 Spark Plugs
Complete/Professional Installation
Custom ECU Calibration
Color Print out displaying baseline/final results
Vengeance Racing Limited Warranty

Neither require any fueling upgrade...

[ABADZL1]

[QUOTE=STUNNAH;9706191]So that means that Lingenfelter, Vengeance, and other performance shops are wrong as well, and that nobody really knows shit???

Partly correct. There is only 3 tuners shops in this country that I would trust tuning my cars. After seeing some of these tunes from these high volume shops, just makes you Lol

[gmorris]

My injectors were at 105% duty with just a 10% lower and headers...and that was with COT turned off and leaned out from factory at redline. It may have worked that way for quite some time but if the fuel pump evens started to weaken she would have been toast. That's my actual experience, not just assuming someone else knows what they're doing because they charge for it. Your car, do what you want.

[RedZL1]

Originally Posted by STUNNAH

So that means that Lingenfelter, Vengeance, and other performance shops are wrong as well, and that nobody really knows shit???

I never said that, so not sure why you're butt hurt and feel need to quote their "stage I kits".

Just to be clear, you made an authoritative statement with regard to not having to upgrade "fuel system" when using 2.5" upper. That is a generalized statement and cannot be applied to every car....no two are identical. What works for one may not work for all.

despite numerous people in this thread/w real world results stating the same thing regarding limitations of stock injectors, you are in essence saying people on this forum don't know shit.

[nighttowl]

Originally Posted by STUNNAH

So that means that Lingenfelter, Vengeance, and other performance shops are wrong as well, and that nobody really knows shit???

http://www.lingenfelter.com/product/L010222012.html

Vengeance Racing
FACTORY SUPERCHARGED
STAGE 1 CAMARO ZL1 Performance Package
645HP
$2,499.99
Roto Fab Cold Air Induction
2.55” Upper Pullley
10 Bolt Supercharger Hub
Solid Isolator
Appropriate serpentine belt
Billet Catch Can with AN Lines/Fittings
VR Valve Cover breather
160* Thermostat
Vengeance Racing High Temperature Protective Heat Sleeves
NGK TR6 Spark Plugs
Complete/Professional Installation
Custom ECU Calibration
Color Print out displaying baseline/final results
Vengeance Racing Limited Warranty

Neither require any fueling upgrade...

A while back I talked with cunningham motorsports about if I needed fueling upgrades beyond injectors for a stage 1 kit (BAP) - they said that they handled that on a case by case basis.

[nighttowl]

Originally Posted by gmorris

My injectors were at 105% duty with just a 10% lower and headers...and that was with COT turned off and leaned out from factory at redline. It may have worked that way for quite some time but if the fuel pump evens started to weaken she would have been toast. That's my actual experience, not just assuming someone else knows what they're doing because they charge for it. Your car, do what you want.

According to HP tuners log, with stock injectors my injector duty was at 115% with a CAI, 10% pulley and headers.

I upgraded to ID850's. Im around 55% DC at 575 rwhp. Stock fuel pump still, no BAP; at redline i only have about 45 psi of fuel pressure left.

[KaBoom1701]

I sit around 55-58 lbs of fuel pressure with my mods listed below and I run a booster pump.

For what it's worth to add to this topic........

[ABADZL1]

I run 63-67. Nightowl, put a BAP on that thing. Lol. It will bring IDC down a little

Sent from my SM-G930V using Tapatalk

[ZO6 Bryan]

Hahahaha!

Originally Posted by STUNNAH

So that means that Lingenfelter, Vengeance, and other performance shops are wrong as well, and that nobody really knows shit???