What makes an LTX an LTX?

Reply Subscribe

Thread Tools

Search this Thread

Feb 7, 2008 | 12:27 PM

BADSZ28

Thread Starter

11 Second Club

iTrader: (39)

Joined: Jan 2003

Posts: 3,321

Likes: 1

From: NW Chicago Subs

What makes an LTX an LTX?

Just want to clarify. for example, If an LT1 block has SB2.2 heads is it still an LTX?

Feb 7, 2008 | 12:52 PM

Tony Shepherd

8 Second Club

iTrader: (4)

Joined: Oct 2002

Posts: 2,913

Likes: 2

From: Round Rock TX

You will get a bunch of opinions on that.

Feb 7, 2008 | 12:56 PM

Mojave

TECH Regular

iTrader: (4)

Joined: Jun 2005

Posts: 489

Likes: 0

I would say reverse cooling. The LT1 block is different than an SBC block to accommodate the reverse cooling setup.

Feb 7, 2008 | 01:25 PM

Speed Density

hashtagBMW

iTrader: (38)

Joined: Jul 2005

Posts: 6,572

Likes: 2

From: Boise, Idaho

Quote:

Originally Posted by BADSZ28

Just want to clarify. for example, If an LT1 block has SB2.2 heads is it still an LTX?

Sorta. But not really.

As said above you are going to get a lot of mixed opinions on this.

My take on this is that it has to be an OEM or Aftermarket peice that was made for the LT1 specific, to be an LT1.

Feb 7, 2008 | 01:42 PM

94'BLKBRD

TECH Addict

iTrader: (76)

Joined: May 2005

Posts: 2,976

Likes: 0

From: SoCal

The block and reverse cooling heads,oh yeah and that famous opti.

Feb 7, 2008 | 01:49 PM

buffman

TECH Addict

iTrader: (9)

Joined: Nov 2004

Posts: 2,289

Likes: 0

From: Kzoo, MI

I know someone who custom made an aluminum LTX block out of a donovan 400 SBC block. It uses the opti, has reverse cooling, etc. I consider it an LTX

Matt

Feb 7, 2008 | 01:50 PM

sweet-94z28

TECH Enthusiast

iTrader: (30)

Joined: Jan 2008

Posts: 679

Likes: 0

Reverse cooling for sure. Opti is famous too.

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Feb 7, 2008 | 02:51 PM

ToxicFormula

11 Second Club

Joined: May 2005

Posts: 330

Likes: 0

From: Hockessin, De

Yea I agree. Definitely gotta have the reverse cooling. but the opti isn't a must I know of quite a few who are running carb style intakes and are running a normal crab type distributor.

Feb 7, 2008 | 02:56 PM

#10

Checkmate007

On The Tree

Joined: Feb 2008

Posts: 146

Likes: 0

I asked this question somewhere else and they told me that to have a generation two LT engine you must have a 10125327 casting number on the block.

Is that true?

Feb 8, 2008 | 08:45 AM

#11

BADSZ28

Thread Starter

11 Second Club

iTrader: (39)

Joined: Jan 2003

Posts: 3,321

Likes: 1

From: NW Chicago Subs

Hmmm... Just saw Biz's sig and wonderring what the rules are for the LTX shootout when it comes to the motor. That would be enough to clear this up for me.

Feb 8, 2008 | 09:07 AM

#12

slick1851

TECH Junkie

Joined: Nov 2003

Posts: 3,265

Likes: 1

From: CHITOWN

SBC heads= not really a LT1 anymore

Feb 8, 2008 | 09:43 AM

#13

BADSZ28

Thread Starter

11 Second Club

iTrader: (39)

Joined: Jan 2003

Posts: 3,321

Likes: 1

From: NW Chicago Subs

Quote:

Originally Posted by slick1851

SBC heads= not really a LT1 anymore

That is my thought exactly.

Feb 8, 2008 | 02:10 PM

#14

RBE17

Staging Lane

iTrader: (18)

Joined: Feb 2005

Posts: 79

Likes: 0

Quote:

Originally Posted by slick1851

SBC heads= not really a LT1 anymore

Even though they've been converted to reverse cooled? I'm not sure why you wouldn't still consider it LT1.

Feb 8, 2008 | 02:11 PM

#15

FASTFATBOY

TECH Veteran

iTrader: (23)

Joined: Nov 2002

Posts: 4,861

Likes: 2

From: Mobile Ala

Quote:

Originally Posted by slick1851

SBC heads= not really a LT1 anymore

Sooooo, just what do you think a factory LT1 head is??? It is a reverse cooled L98 head.

WHat do you think an AFR, Trick FLow, Dart and Edleblock heads that you buy for an LT1 are? A reverse cooled Gen 1 head....there are no other differences.

So if some company made an over the counter SB2 head ready to bolt on, in your eyes it is still an LT1 right? But if someone had it done on their own...it is no longer an LT1...I can see the logic in that

David

Feb 8, 2008 | 04:06 PM

#16

buffman

TECH Addict

iTrader: (9)

Joined: Nov 2004

Posts: 2,289

Likes: 0

From: Kzoo, MI

^^ Just a reversed cooled l98 head? Hardly..

Feb 8, 2008 | 04:26 PM

#17

FASTFATBOY

TECH Veteran

iTrader: (23)

Joined: Nov 2002

Posts: 4,861

Likes: 2

From: Mobile Ala

Quote:

Originally Posted by buffman

^^ Just a reversed cooled l98 head? Hardly..

Elaborate please.

I was told by one of my head porters that the ports were mirror images of each other in stock form.

David

Feb 8, 2008 | 04:35 PM

#18

buffman

TECH Addict

iTrader: (9)

Joined: Nov 2004

Posts: 2,289

Likes: 0

From: Kzoo, MI

compared to the L98 head the LT1 head had revised port angles and higher port ceilings CC shape is different also

Attached Thumbnails

Feb 8, 2008 | 05:13 PM

#19

nighthawk15

TECH Resident

Joined: Jul 2007

Posts: 749

Likes: 1

From: Spokane, WA

IMO if it has reverse cooling its an LT1. It may not sound like that big of a dif, but it is, and its also what really sets an LT1 apart from an SBC. Without it the LT1 would not be capable of the high compression #s that it can make on pump gas.