LME 390

JSH · 11-06-2023, 05:10 PM

I bought LME's 1200hp aluminum 390 with Katech oil pump, Cam motion 235/248 .640/630, 118+4, 38% fuel, billet valley cover, 61cc combustion chambers , 10.65 compression ratio.

They're going to freshen and install my heads. I don't know what new valve train parts will be added but pushrods for sure.

I was interested to hear that they do Hennessey's heads.

3 weeks delivery. All parts are in stock.

I now have an HPE 850 with custom heads and GM short block for sale.

Joshinator99 · 11-06-2023, 06:24 PM

Quote:

Originally Posted by JSH

I bought LME's aluminum 390 with Katech oil pump, Cam motion 235/248 .640/630, 118+4, 38% fuel, billet valley cover, 61cc combustion chambers , 10.65 compression ratio.

They're going to freshen and install my heads. I don't know what new valve train parts will be added but pushrods for sure.

I was interested to hear that they do Hennessey's heads. 3 weeks delivery. All parts are in stock.

I now have a GM short block for sale.

Perfect choice, in my opinion. Large bore but stock stroke is mint for a high power PD blower setup.

*radz28* · 11-07-2023, 07:09 AM

Not surprising, since they're pretty close, and LME does good work.

Can't wait to see the numbers. Congrats'.

2018ZL1 · 11-07-2023, 08:25 AM

Wont have to worry about that stupid friggin thrust bearing on this!!!

JSH · 11-07-2023, 08:40 AM

Quote:

Originally Posted by 2018ZL1

Wont have to worry about that stupid friggin thrust bearing on this!!!

I believe mine is dead or dying, and I will find out in a few weeks.

Katech_Mike · 11-07-2023, 08:56 AM

Quote:

Originally Posted by Joshinator99

Perfect choice, in my opinion. Large bore but stock stroke is mint for a high power PD blower setup.

I believe they are using a 4.070" bore with a 3.750" stroke to make their 390.

Joshinator99 · 11-07-2023, 09:58 AM

Quote:

Originally Posted by Katech_Mike

I believe they are using a 4.070" bore with a 3.750" stroke to make their 390.

Ah…not as cool if true lol (but undoubtedly still a great engine).

JSH · 11-07-2023, 10:42 AM

Quote:

Originally Posted by Katech_Mike

I believe they are using a 4.070" bore with a 3.750" stroke to make their 390.

Yes, 4.070 x 3.750. I prefer bore over stroke and asked about an even larger piston, which requires a different sleeve but with a six-month delivery.

As I said in my email, KaTech was my first choice, but the additional stroke in the 416 made me nervous, and your 390 parts were not in stock, but LME's are.

2018ZL1 · 11-07-2023, 12:16 PM

Quote:

Originally Posted by JSH

I believe mine is dead or dying, and I will find out in a few weeks.

I wish I would have known mine was going to let go! It let me know ion the big end of a 9.5X run!

My new motor ended up being a 388 from an iron L8T block. Going to the track this Sunday to see what kinda times it will run.

Joshinator99 · 11-07-2023, 02:17 PM

Quote:

Originally Posted by 2018ZL1

I wish I would have known mine was going to let go! It let me know ion the big end of a 9.5X run!

My new motor ended up being a 388 from an iron L8T block. Going to the track this Sunday to see what kinda times it will run.

Did you get a chance to redyno with the new engine? Wish that L8T block wasn’t iron…but I’m sure it’s strong AF though.

2018ZL1 · 11-07-2023, 02:23 PM

Quote:

Originally Posted by Joshinator99

Did you get a chance to redyno with the new engine? Wish that L8T block wasn’t iron…but I’m sure it’s strong AF though.

I did... made 940RWHP same as the last motor but its only running about 16lbs of boost compared to my last motor that was running 20lbs. It is most def a tad heavier! I like the way the car sits lower in the front though! Made some easy hits on it with a 1.80 60 ft and it ran a 9.90 @ 147MPH The MPH makes me think it will run 9.5X maybe lower. Putting a 15 inch tire on the rear this winter to see if that helps. It really needs a 2650!

Joshinator99 · 11-07-2023, 02:48 PM

Quote:

Originally Posted by 2018ZL1

I did... made 940RWHP same as the last motor but its only running about 16lbs of boost compared to my last motor that was running 20lbs. It is most def a tad heavier! I like the way the car sits lower in the front though! Made some easy hits on it with a 1.80 60 ft and it ran a 9.90 @ 147MPH The MPH makes me think it will run 9.5X maybe lower. Putting a 15 inch tire on the rear this winter to see if that helps. It really needs a 2650!

Well you’ve set the stage to make mondo power anyway. I think a Maggie 2650 or Whipple 3.0 is the key to feeding that bad boy (or twins lol).

2018ZL1 · 11-07-2023, 02:55 PM

[QUOTE=Joshinator99;11376976]Well you’ve set the stage to make mondo power anyway. I think a Maggie 2650 or Whipple 3.0 is the key to feeding that bad boy (or twins lol).

[/QUOTE

Yep... Don't like spending money on something twice! Who knows what this thing will end up as! lol I could have bought a copo by now! :/

JSH · 11-07-2023, 07:27 PM

Quote:

Originally Posted by 2018ZL1

I did... but its only running about 16lbs of boost compared to my last motor that was running 20lbs... It really needs a 2650!

My current motor makes 20-21# boost with a 2650 because cam and heads are not designed to flow that much cfm. I expect boost on this 390 to go down.

11-06-2023, 05:10 PM	#1
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 3,562	LME 390 I bought LME's 1200hp aluminum 390 with Katech oil pump, Cam motion 235/248 .640/630, 118+4, 38% fuel, billet valley cover, 61cc combustion chambers , 10.65 compression ratio. They're going to freshen and install my heads. I don't know what new valve train parts will be added but pushrods for sure. I was interested to hear that they do Hennessey's heads. 3 weeks delivery. All parts are in stock. I now have an HPE 850 with custom heads and GM short block for sale. __________________ '20 ZL1 1LE A10, OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next. Last edited by JSH; 11-07-2023 at 08:21 PM.

11-07-2023, 07:09 AM	#3
radz28 Petro-sexual Drives: Ultra-Grin Join Date: Oct 2006 Location: Crazy Coast Posts: 15,201 View My Garage	Not surprising, since they're pretty close, and LME does good work. Can't wait to see the numbers. Congrats'. __________________ '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

11-07-2023, 08:25 AM	#4
2018ZL1 Drives: 2018 ZL1 A10 NFG Join Date: Feb 2018 Location: Woodbine Md Posts: 655 View My Garage	Wont have to worry about that stupid friggin thrust bearing on this!!! __________________ 2018 ZL1-NFG-A10 New Iron L8T 9.32 147MPH

11-07-2023, 02:55 PM	#13
2018ZL1 Drives: 2018 ZL1 A10 NFG Join Date: Feb 2018 Location: Woodbine Md Posts: 655 View My Garage	[QUOTE=Joshinator99;11376976]Well you’ve set the stage to make mondo power anyway. I think a Maggie 2650 or Whipple 3.0 is the key to feeding that bad boy (or twins lol). [/QUOTE Yep... Don't like spending money on something twice! Who knows what this thing will end up as! lol I could have bought a copo by now! :/ __________________ 2018 ZL1-NFG-A10 New Iron L8T 9.32 147MPH

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