LNF block

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Feb 10, 2010 | 04:45 AM

#26

oopsitouchedmyself

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From: wisconsin

or aluminum sleeve with nikasil plating

http://en.wikipedia.org/wiki/Nikasil

Feb 10, 2010 | 11:58 AM

#27

cardelino18

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From: florida

i kind of have to worry about them then... i am planning on that kind of power but eventually i will change the pistons and rods very soon.... with my turbo set up that im doing right now those numbers are not far at all for me but obviously i will change the internals...

Feb 10, 2010 | 12:32 PM

#28

krispy

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From: Somewhere, MI

Quote:

Originally Posted by tomj77

i love it how people go into technical detail of what it is, its aluminum, just leave it at that. lol does anyone even make cast iron blocks anymore??

Cast iron is used heavily for truck and full frame SUV blocks where weight savings aren't nearly as significant as needed to justify the cost increase.

Feb 18, 2010 | 08:24 AM

#29

mongorat427

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From: pittsburgh

The LNF block and the 2.4 block are both what is called Gen 2 blocks which are much stronger than the earlier blocks

Feb 18, 2010 | 09:49 AM

#30

Stamina

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From: Tejas

Quote:

Originally Posted by mongorat427

The LNF block and the 2.4 block are both what is called Gen 2 blocks which are much stronger than the earlier blocks

^qft

Block is aluminum. Sleeves are cast iron.

http://en.wikipedia.org/wiki/GM_Family_II_engine#Ecotec

On that earlier note, Aluminum is a material while casting is a process.

Feb 18, 2010 | 11:04 AM

#31

buellfooll

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From: Sunshine State

Quote:

Originally Posted by cakeeater

Uhhh, yea plenty of companies make iron blocks. They resist deformation better than aluminum. The block is aluminum and so are the sleeves. I wouldn't worry about the block as you are never, ever going to be making too much power for it. The sleeves on the other hand, could have to be replaced beyond certain power levels. I really have no idea what the tolerances of the sleeves are, but I would guess the limits are under or around ~550hp. You really don't have to worry about that kind of stuff right now though. Your rods and pistons will be long gone before you have to worry about sleeves.

I have a build book that goes back to 2001 where GM threw a bunch of money at a independent engine builder to work with the Ecotec to find various breaking points. They ended the testing at 747HP and they were still on the stock block AND SLEEVES. Most of the people on this forum have no idea just how strong this little engine is.

Quote:

Originally Posted by oopsitouchedmyself

or aluminum sleeve with nikasil plating

http://en.wikipedia.org/wiki/Nikasil

Not sure if Nikasil is the same as chrome I think it is, but chrome bore aluminum blocks have been around since the early 60's. The Chevy Chevette 4 cyl's were chrome bore. And as soon as the pistons stuck you could bore the holes and press in steel sleeves and have an engine that was actually a very good little motor.

Last edited by buellfooll; Feb 18, 2010 at 11:04 AM. Reason: Automerged Doublepost

Feb 18, 2010 | 11:07 AM

#32

1SLOLT1

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From: Honolulu Hawaii

ALUMINUM!!!! oh YEA pLAYA

Feb 20, 2010 | 08:06 PM

#33

cakeeater

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From: right behind you.

Quote:

Originally Posted by buellfooll

That doesn't mean the sleeves won't crack with 500hp after two weeks of doing mild runs. First of all, I would be willing to bet they did that testing on an engine dyno, which is COMPLETELY different from putting it under load on the street and dealing with other factors that come into play when actually driving and racing. Second, making 750hp one time means very little. Plenty of engines have broken the 4 digit mark on single occasions with no problems whatsoever while others with the same engine and similar modifications/tuning will have problems at 3/4 the power.

Feb 21, 2010 | 12:47 AM

#34

09CobaltSS1

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From: Connecticut

GM's 08+ performance build book for LSJ/LNF recommends upgrading sleeves, rods and valves for builds over 400bhp and pistons for over 300bhp just an fyi.

Don't flame me for these numbers being too conservative and all that fun stuff.. I'm only conveying what's in the build specs

Last edited by 09CobaltSS1; Feb 21, 2010 at 12:50 PM.