LT4 Tuned Reliability? - Page 2

LT4Greg · 04-21-2020, 09:38 AM

To Craig, go ahead and void your warranty then! It’s your choice and good luck!

cirpower · 04-21-2020, 10:20 AM

How do people feel about swapping out the oil pump preventatively to the newest model? How much is the cost to swap oil pumps?

L78toLT1 · 04-21-2020, 10:44 AM

Quote:

Originally Posted by cirpower

How do people feel about swapping out the oil pump preventatively to the newest model? How much is the cost to swap oil pumps?

I'd say it's a good idea. Last time I looked there were thirty something failures reported on the pump failure thread. That's not insignificant given that it only considers cars owned by forum members. Unfortunately, it's a pain to swap out the pump with the motor in the car. I don't think there's enough clearance to do it without dropping the pan.

19Nasty1le · 04-22-2020, 01:17 PM

Quote:

Originally Posted by Juiced1

There is good power in just a tune and if you're not heavily modded a dealer won't even notice the car is tuned. 99% of all LT4 engine failures occur for two reasons....defective oil pump in the first few thousand miles and the other would be cars pushing 1000rwhp. If you have some miles on the car and the oil pressure is good I wouldn't worry about blowing your motor.

My car has about 6500km (almost 4000miles) on it now, No issues so far, Only mods are Soler 91mm TB and TC, Roto-Fab CAI, Corsa Xtreme+ Catback.

Blu Ray · 04-26-2022, 03:23 PM

Quote:

Originally Posted by Hell Raiser

If you got a good relationship with your dealer even if tune the dealer can reflash your computer back to stock if you kept you old files. That's the bottom line IF and If so its all up to you and the dealer. It is best to know your service manager so he knows it is you
That's the person who can help or break you.

No dealer or Service Manager is going to value your relationship over that of GM corporate and RISK lying to the Reginal rep by flashing your ECU then lying and saying it was never tuned. Does not matter how close you are

2018ZL1 · 04-26-2022, 03:50 PM

Quote:

Originally Posted by cirpower

How do people feel about swapping out the oil pump preventatively to the newest model? How much is the cost to swap oil pumps?

I had them replace my oil pump while the engine was out doing a cam swap... call me paranoid! Went with the "newer" GM pump. So far so good!!

clg82 · 04-26-2022, 04:40 PM

Quote:

Originally Posted by Blu Ray

No dealer or Service Manager is going to value your relationship over that of GM corporate and RISK lying to the Reginal rep by flashing your ECU then lying and saying it was never tuned. Does not matter how close you are

Umm this thread is 2 years old....

2018ZL1 · 04-26-2022, 04:54 PM

Quote:

Originally Posted by clg82

Umm this thread is 2 years old....

Oh shit!!! lol

getchapull · 04-26-2022, 06:24 PM

So what power gains could one see with just a tune?

For me, drive-ability (M6) and more power would be a nice.

LiqTenExp · 04-26-2022, 06:49 PM

A good tuner would work on your driver demand tables to improve M6 driveability (I know I do). Stock car with tune will make more power but your but dyno won't really register it.

You can see the areas that I have pulled out some torque at low speeds under medium throttle inputs. This helps me on my M6 car with big cam to get a lot of driveability back. My car is very responsive down there and make a ton of torque and would easily get jerky over bumps in 1st or 2nd due to minor throttle pedal inputs. Now it no longer does that. First picture is a delta from my car to stock ZL1, second picture is my DD table now, third is stock ZL1 DD table.

EDFHOBBIES · 04-27-2022, 10:04 AM

Honestly if you can't afford a 8500 block and 3k to have a shop R&R the motor you do not need to mod anything if your worried about a warranty.

Its that easy...

SJFGTO · 04-27-2022, 11:10 AM

Quote:

Originally Posted by getchapull

So what power gains could one see with just a tune?

For me, drive-ability (M6) and more power would be a nice.

A tune alone is not a cost effective mod. For the very modest HP gain you lose your power train warranty and will have to re tune if mods (headers, pulley, cam, etc) are added. You have 650 from the get go, a tune alone wont improve that much.

*radz28* · 04-27-2022, 11:24 AM

Perhaps, with an M6, you might be able to improve drivability (the bog), but GM tuned the LT4 to run on 93, so the spark is already near the limit of that octane. The intake flows reasonably well for the rated power. Unless you make improvements on the airflow side, you won't get much, in terms of power, over the OEM file.

zupesterLT1 · 04-27-2022, 04:44 PM

I put a CAI, long tube headers, full flow cats and a nice non crushed mid pipe into the factory mufflers and converted to E85. I have 625RWHP and 586 ft/lbs torque its a blast to drive and the e85 is cheap to fill up but she does drink more. I have friends that have many miles on their cars with exactly this set up. This is a pretty mild mod and she runs great. Just Saying. Yes she has been dyno tuned. Costs money to go fast.

04-21-2020, 09:38 AM	#15
LT4Greg Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016 Location: Georgia Posts: 5,813	To Craig, go ahead and void your warranty then! It’s your choice and good luck! __________________ ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.

04-26-2022, 06:49 PM	#24
LiqTenExp Drives: 2017 ZL1 Join Date: Jan 2017 Location: NJ Posts: 905	A good tuner would work on your driver demand tables to improve M6 driveability (I know I do). Stock car with tune will make more power but your but dyno won't really register it. You can see the areas that I have pulled out some torque at low speeds under medium throttle inputs. This helps me on my M6 car with big cam to get a lot of driveability back. My car is very responsive down there and make a ton of torque and would easily get jerky over bumps in 1st or 2nd due to minor throttle pedal inputs. Now it no longer does that. First picture is a delta from my car to stock ZL1, second picture is my DD table now, third is stock ZL1 DD table. Attached Images __________________ 2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93) Last edited by LiqTenExp; 04-26-2022 at 07:00 PM.

04-27-2022, 10:04 AM	#25
EDFHOBBIES Dyno Show Queen LOL Drives: 16 SS & 17 ZL1 Both Yellow Join Date: Jan 2014 Location: Houston Posts: 4,345 View My Garage	Honestly if you can't afford a 8500 block and 3k to have a shop R&R the motor you do not need to mod anything if your worried about a warranty. Its that easy... __________________ Kong Ported 2650, Crawford Racing Port Injection, Weapon X 112mm Adapter, NW112mm TB, Livernois Ported LT4 Heads, Lingenfelter GT32 stealth cam, Haltech Elite, and Carbon by Trufiber

04-27-2022, 11:24 AM	#27
radz28 Petro-sexual Drives: Ultra-Grin Join Date: Oct 2006 Location: Crazy Coast Posts: 15,192 View My Garage	Perhaps, with an M6, you might be able to improve drivability (the bog), but GM tuned the LT4 to run on 93, so the spark is already near the limit of that octane. The intake flows reasonably well for the rated power. Unless you make improvements on the airflow side, you won't get much, in terms of power, over the OEM file. __________________ '20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs

04-27-2022, 04:44 PM	#28
zupesterLT1 2018 Convertible ZL1 Drives: 2018 ZL1 Convertible Join Date: Nov 2020 Location: St. Louis Posts: 27 View My Garage	Tuned I put a CAI, long tube headers, full flow cats and a nice non crushed mid pipe into the factory mufflers and converted to E85. I have 625RWHP and 586 ft/lbs torque its a blast to drive and the e85 is cheap to fill up but she does drink more. I have friends that have many miles on their cars with exactly this set up. This is a pretty mild mod and she runs great. Just Saying. Yes she has been dyno tuned. Costs money to go fast.

04-21-2020, 10:20 AM	#16
cirpower Drives: Camaro ZL1 Join Date: Jan 2018 Location: Kansas City Posts: 201	How do people feel about swapping out the oil pump preventatively to the newest model? How much is the cost to swap oil pumps?

04-26-2022, 06:24 PM	#23
getchapull TEXIT Drives: 2019 ZL1 M6 Join Date: Aug 2018 Location: Republic of Texas Posts: 160	So what power gains could one see with just a tune? For me, drive-ability (M6) and more power would be a nice.

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