Our stock 2019 A10 dyno results.

Bain · 03-16-2019, 11:05 AM

Finally got enough miles on it to open it up

The results were a best of 554hp 598tq. Now time to start adding mods

https://youtu.be/0Y6Q4XCcYx4

gotswap · 03-16-2019, 11:10 AM

Damn, it goes pig rich under load.... No wonder there are good gains with just tuning.

Camarolover85 · 03-16-2019, 11:19 AM

Quote:

Originally Posted by gotswap

Damn, it goes pig rich under load.... No wonder there are good gains with just tuning.

Care to elaborate? I know absolutely nothing about this so I’m curious. I’m looking at jumping into a ZL1 and haven’t seen or heard anything about tuning gains.

Pepsiguru · 03-16-2019, 01:34 PM

Those are good stock numbers . . . Healthy

IOMike · 03-16-2019, 01:53 PM

Quote:

Originally Posted by gotswap

Damn, it goes pig rich under load.... No wonder there are good gains with just tuning.

I'd disagree. I see about 11.0 AFR. Boosted applications usually run 11.5-11.8 AFR. Some power, but definitely not pig rich.

Stealth7 · 03-16-2019, 03:00 PM

You should ask for SAE corrected Dyno numbers as those are the most realistic. STD #s overstate power.

S.T.A.R. · 03-16-2019, 03:17 PM

Impressive torque number.

Airfuel · 03-16-2019, 03:27 PM

What’s with the drop off after about 6k and up. Is that normal ?

Ron_Robinson1 · 03-16-2019, 04:33 PM

Quote:

Originally Posted by Airfuel

What’s with the drop off after about 6k and up. Is that normal ?

Probably this was due to the gear it was in, mine also did this, on the first dyno pulls because it was in 6th gear. 1:1 is the 7th gear, I bet that was the issue.

gotswap · 03-16-2019, 06:14 PM

Quote:

Originally Posted by IOMike

I'd disagree. I see about 11.0 AFR. Boosted applications usually run 11.5-11.8 AFR. Some power, but definitely not pig rich.

My 500hp S2000 runs just under 12 on AFR and is still a bit rich. You are saying this AFR is normal?

hawk02 · 03-16-2019, 06:51 PM

Quote:

Originally Posted by gotswap

Damn, it goes pig rich under load.... No wonder there are good gains with just tuning.

Got to protect those cats for 8 yrs or 80,000 miles.

SFV1LE · 03-16-2019, 08:10 PM

Quote:

Originally Posted by IOMike

I'd disagree. I see about 11.0 AFR. Boosted applications usually run 11.5-11.8 AFR. Some power, but definitely not pig rich.

That's correct, 11.0 seems perfect to me for a stock ZL1. But I wouldn't feel great about 11.8 AFR on 91 pump gas here in CA, except for street driving only. If an 11.8 AFR fluctuates you can get damaging knock on a hot track day, or once the SC heats up.

Even running 100% E85 on my 3576R Evo X, I preferred to keep AFR under 12 for track duty. I was running 26-27 PSI peak though, much higher than ZL1 boost.

BMWM.D. · 03-16-2019, 11:25 PM

I think some of you guys are confusing the recommended AFR of direct injection engines with port injected engines. DI engines run quite a bit leaner than port injection in most cases.

A lot of reputable tuners run these LT4s as lean as .85 lambda. As much as I hate using AFR to describe this stuff as it’s confusing and often inaccurate (it varies a lot based on ethanol content; lambda doesn’t), .85 lambda is about 12.47:1 on straight gasoline. I run mine at .80-.81 (11.75-11.9 ish, and that’s considered on the rich side. I’d go leaner if we didn’t have crap gas out here.

So yes, this is normal for a stock ZL1, but also quite rich. Mine was pretty much identical stock. It’s this rich condition that myself and many other tuners have pegged as the biggest issue with the factory tune file. It seems to over-report airflow, which makes it run rich as well as limit torque output more than it should. Correcting the airflow model helps a ton.

Bain · 03-17-2019, 12:15 AM

Quote:

Originally Posted by Ron_Robinson1

Probably this was due to the gear it was in, mine also did this, on the first dyno pulls because it was in 6th gear. 1:1 is the 7th gear, I bet that was the issue.

The pull was in 7th gear.

03-16-2019, 11:05 AM	#1
Bain Drives: 2019 Shadow Gray Metallic ZL1 Join Date: Jan 2019 Location: Fort Worth, TX Posts: 57	Our stock 2019 A10 dyno results. Finally got enough miles on it to open it up The results were a best of 554hp 598tq. Now time to start adding mods https://youtu.be/0Y6Q4XCcYx4 Attached Images Last edited by Bain; 03-16-2019 at 12:02 PM.

03-16-2019, 03:27 PM	#8
Airfuel Drives: '19 2SS M6. Join Date: Aug 2018 Location: CT Posts: 340	What’s with the drop off after about 6k and up. Is that normal ? __________________ 2019 2SS, Shadow gray, 6mt, NPP, Magneride, Bose.

03-16-2019, 11:10 AM	#2
gotswap Drives: 2019 ZL1 Crush Join Date: Jan 2019 Location: Colorado Springs Posts: 564	Damn, it goes pig rich under load.... No wonder there are good gains with just tuning.

03-16-2019, 01:34 PM	#4
Pepsiguru Drives: 2018 ZL1 A10 Join Date: Feb 2019 Location: Santa Clarita, CA Posts: 87	Those are good stock numbers . . . Healthy

03-16-2019, 03:00 PM	#6
Stealth7 Drives: Gen V Viper GTS Join Date: Jan 2018 Location: SoCal Posts: 260	You should ask for SAE corrected Dyno numbers as those are the most realistic. STD #s overstate power.

03-16-2019, 03:17 PM	#7
S.T.A.R. Drives: 18'-1LE Join Date: Jul 2017 Location: SHENANDOAH, PA Posts: 430	Impressive torque number.

03-16-2019, 11:25 PM	#13
BMWM.D. Drives: ZL1/335i Join Date: Apr 2014 Location: Santa Barbara Posts: 870	I think some of you guys are confusing the recommended AFR of direct injection engines with port injected engines. DI engines run quite a bit leaner than port injection in most cases. A lot of reputable tuners run these LT4s as lean as .85 lambda. As much as I hate using AFR to describe this stuff as it’s confusing and often inaccurate (it varies a lot based on ethanol content; lambda doesn’t), .85 lambda is about 12.47:1 on straight gasoline. I run mine at .80-.81 (11.75-11.9 ish, and that’s considered on the rich side. I’d go leaner if we didn’t have crap gas out here. So yes, this is normal for a stock ZL1, but also quite rich. Mine was pretty much identical stock. It’s this rich condition that myself and many other tuners have pegged as the biggest issue with the factory tune file. It seems to over-report airflow, which makes it run rich as well as limit torque output more than it should. Correcting the airflow model helps a ton.

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