Iron block guys.

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Dec 31, 2013 | 09:04 AM

#61

Lloyd Christmas

Racer

Joined: Oct 2011

Posts: 371

Likes: 0

From: Tucker Georgia

I broke an LS1 block with only 550hp. Its not a typical experience and I don't have the best of luck. Just saying.

Dec 31, 2013 | 10:21 AM

#62

Kreeess

Burning Brakes

Joined: Jan 2013

Posts: 1,091

Likes: 1

From: Hercules CA

Quote:

Originally Posted by Lloyd Christmas

I broke an LS1 block with only 550hp. Its not a typical experience and I don't have the best of luck. Just saying.

how many miles? and what exactly happened?

Dec 31, 2013 | 11:32 AM

#63

inspector12

Drifting

Joined: Dec 2003

Posts: 1,755

Likes: 88

From: Pearland Texas

Quote:

Originally Posted by jimbos'ss

That's crazy, never seen an iron LS block do that.

Seem quite a few, but most were in higher HP cars is the only difference in this one really. Friend cracked 4 LQ9 blocks he's now on an LSX block that's holding so far. It's only my third LSX block I've seen do this or something real similar, same area etc...

Jan 3, 2014 | 07:09 PM

#64

MMA FIGHTER2

Pro

Joined: Feb 2009

Posts: 501

Likes: 3

From: Woodbridge va

Does the iron block take the same oil pressure sending unit as the stock block?

Jan 3, 2014 | 08:26 PM

#65

a/c man

Le Mans Master

Joined: Jan 2009

Posts: 7,767

Likes: 19

From: East Texas

Quote:

Originally Posted by MMA FIGHTER2

Does the iron block take the same oil pressure sending unit as the stock block?

yes

Jan 3, 2014 | 08:55 PM

#66

MMA FIGHTER2

Pro

Joined: Feb 2009

Posts: 501

Likes: 3

From: Woodbridge va

Quote:

Originally Posted by a/c man

yes

Thanks

Jan 3, 2014 | 08:56 PM

#67

MawneeC5

Melting Slicks

Joined: Aug 2004

Posts: 2,237

Likes: 9

From: Springhill FL

I just finished my LM7 5.3 Iron block install this week. The only physical difference I found with the blocks was my LS6 block has 6 "motor mount" holes on the sides of the block while the 5.3 only had 4. The ones we need for the mounts are there, However our grounding straps on boths sides use those missing back bolt holes. I had to ground elsewhere. Another difference I noticed was the rear cover passage for the oil is not cut out on the block, its just holes. It will still crossover though as the rear main cover is cut out for it. All covers ,sensors, ect moved over to the new engine without issue.

Jan 5, 2014 | 12:03 AM

#68

Lloyd Christmas

Racer

Joined: Oct 2011

Posts: 371

Likes: 0

From: Tucker Georgia

Quote:

Originally Posted by Kreeess

how many miles? and what exactly happened?

70,000 on a stock engine, then about 3,000 with the blower. Looked like the block let go on #7 and maybe water broke the piston. There were no signs of detonation before or after. Normally it goes the other way, meaning 7 leans out and breaks the piston, but even then the block doesn't usually crack.