LME 390 - Page 4

2018ZL1 · 12-28-2023, 05:12 PM

Quote:

Originally Posted by taylorforschool@gmail.com

That’s awfully kind of you!

Do unto others as you would do unto yourself I always say!

JSH · 12-28-2023, 06:09 PM

Quote:

Originally Posted by 2018ZL1

Its gonna sit around here taking up space so you pay for shipping and I will give it to your for a whopping fee of $0

That's a deal thanks. I'll pm LME's contact info to you

2018ZL1 · 12-28-2023, 06:17 PM

Quote:

Originally Posted by JSH

That's a deal thanks. I'll pm LME's contact info to you

I will keep an eye out for it! It doesn't have the cooler on the side of it if that matters...

2018ZL1 · 12-28-2023, 07:03 PM

My bad... it does have the cooler on it! Its complete. PM me your number and I can text you some pics if you would like... It came off of my LT4 that spun a bearing. I cleaned it really good but I am sure LME will clean the crap out of it!

JSH · 01-04-2024, 01:27 PM

Continuing the story...

I learn something new every day. As we pulled my engine we found pieces of a diamond coated washer that was supposed to be between the balancer and the crank timing gear, but it had been installed behind the crank timing gear. The washer is there to bite into the surface of the timing gear and the balancer so that all the load isn't on the keyway. Probably caused the hub failure in my opinion. Hennessey originally installed the bottom assembly in June '20, but it's been removed and reinstalled since then.

I took the windage tray off the pan to remove the big pieces, and found metal in oil and in the pan. The washer was in 3 pieces and when the crank hub broke it put some metal into the oil as well. Also a lifter was stuck and made some grooves in the lifter bore. It had LS7 lifters but LME is installing Johnson lifters. We now have to clean the oil cooler out or replace it.

This entire saga began as I pulled into my garage following some very ... spirited driving, and heard new and strange metal-on-metal noises. I had no idea about any of this at the time.

All of this might only be helpful if you find yourself taking one apart.

2018ZL1 · 01-04-2024, 01:42 PM

Was the balancer dual keyed?

JSH · 01-04-2024, 02:50 PM

Quote:

Originally Posted by 2018ZL1

Was the balancer dual keyed?

Yes, but it was an ATI super balancer with a pulley, not a solid balancer, which is what I'm putting on it this time, which is the ATI CTS-V & ZL1 LT4 balancer, with the hardened HD hub and dual keyed.

JSH · 01-05-2024, 10:59 AM

I thought some might like to see LME's short block and heads specs. I think they're sending their startup dyno sheet next week.

Joshinator99 · 01-05-2024, 11:03 AM

Quote:

Originally Posted by JSH

I thought some might like to see LME's short block specs. I've asked him for one for the heads too.

Great stuff! Out of curiosity, what oil viscosity are they specifying that you run?

JSH · 01-05-2024, 11:19 AM

Quote:

Originally Posted by Joshinator99

Great stuff! Out of curiosity, what oil viscosity are they specifying that you run?

It will be broken in on the dyno using either Driven 10W40 Breakin oil or the Valvoline VR1 10W40. When I receive the engine they recommend I put another 500 miles on the engine with a quality non-synthetic oil, then after I put the additional 500 miles on the engine, switch to synthetic oil.

2018ZL1 · 01-05-2024, 11:50 AM

The tolerances on my new motor has me using 20W-50 Valvoline VR1

Nimair.ZL1 · 01-05-2024, 12:12 PM

Is the camshaft that is shown spec specifically for your application by LME or is it from a shop?

JSH · 01-05-2024, 02:43 PM

Quote:

Originally Posted by Nimair.ZL1

Is the camshaft that is shown spec specifically for your application by LME or is it from a shop?

Yes, specd and supplied by LME. It turns out they did the motor that I bought from Hennessy. This new engine has a lot more cam in it than that one did

Nimair.ZL1 · 01-06-2024, 10:37 AM

Quote:

Originally Posted by JSH

Yes, specd and supplied by LME. It turns out they did the motor that I bought from Hennessy. This new engine has a lot more cam in it than that one did

Do you have the part number for the oil cooler by any chance? My motor blew and i need to get a new one but I have no idea which to get

12-28-2023, 07:03 PM	#46
2018ZL1 Drives: 2018 ZL1 A10 NFG Join Date: Feb 2018 Location: Woodbine Md Posts: 671 View My Garage	My bad... it does have the cooler on it! Its complete. PM me your number and I can text you some pics if you would like... It came off of my LT4 that spun a bearing. I cleaned it really good but I am sure LME will clean the crap out of it! __________________ 2019 COPO #32 427 NA 9.38 142MPH 2018 ZL1-NFG-A10 388CI L8T 9.32 147MPH

01-04-2024, 01:27 PM	#47
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 3,639	Continuing the story... I learn something new every day. As we pulled my engine we found pieces of a diamond coated washer that was supposed to be between the balancer and the crank timing gear, but it had been installed behind the crank timing gear. The washer is there to bite into the surface of the timing gear and the balancer so that all the load isn't on the keyway. Probably caused the hub failure in my opinion. Hennessey originally installed the bottom assembly in June '20, but it's been removed and reinstalled since then. I took the windage tray off the pan to remove the big pieces, and found metal in oil and in the pan. The washer was in 3 pieces and when the crank hub broke it put some metal into the oil as well. Also a lifter was stuck and made some grooves in the lifter bore. It had LS7 lifters but LME is installing Johnson lifters. We now have to clean the oil cooler out or replace it. This entire saga began as I pulled into my garage following some very ... spirited driving, and heard new and strange metal-on-metal noises. I had no idea about any of this at the time. All of this might only be helpful if you find yourself taking one apart. __________________ '20 ZL1 1LE A10. LME 390, E2650, FBO, 100 oct. 1116/967. 1.35/9.25/151 at 3500 ft. (only one pass) 15" conversion/MT ET Street R 325/50R15.

01-04-2024, 01:42 PM	#48
2018ZL1 Drives: 2018 ZL1 A10 NFG Join Date: Feb 2018 Location: Woodbine Md Posts: 671 View My Garage	Was the balancer dual keyed? __________________ 2019 COPO #32 427 NA 9.38 142MPH 2018 ZL1-NFG-A10 388CI L8T 9.32 147MPH

01-05-2024, 10:59 AM	#50
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 3,639	I thought some might like to see LME's short block and heads specs. I think they're sending their startup dyno sheet next week. Attached Images __________________ '20 ZL1 1LE A10. LME 390, E2650, FBO, 100 oct. 1116/967. 1.35/9.25/151 at 3500 ft. (only one pass) 15" conversion/MT ET Street R 325/50R15. Last edited by JSH; 01-05-2024 at 11:11 AM.

01-05-2024, 11:50 AM	#53
2018ZL1 Drives: 2018 ZL1 A10 NFG Join Date: Feb 2018 Location: Woodbine Md Posts: 671 View My Garage	The tolerances on my new motor has me using 20W-50 Valvoline VR1 __________________ 2019 COPO #32 427 NA 9.38 142MPH 2018 ZL1-NFG-A10 388CI L8T 9.32 147MPH

01-05-2024, 12:12 PM	#54
Nimair.ZL1 Drives: 2023 Chevy Camaro ZL1 Join Date: Nov 2022 Location: Houston Posts: 108 View My Garage	Is the camshaft that is shown spec specifically for your application by LME or is it from a shop?

User Name		Remember Me?
Password