Forged Internals?
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Senior Member
Joined: 09-10-2010
Posts: 904
From: Cleveland, Ohio
Forged Internals?
Can anyone confirm whether or not the 2.2L LAP Ecotec has forged internals? Crank, rods, etc?
Also, a common mod to a 2.2 is a 2.4 intake. Does the LAP already have this wider intake stock?
Also, a common mod to a 2.2 is a 2.4 intake. Does the LAP already have this wider intake stock?
Deceased
Joined: 06-30-2010
Posts: 25,739
From: Kannapolis NC
The 2.2 and 2.4 both feature cast pistons, rods, and crankshafts. The turbocharged 2.0 and the supercharged engine used in the Cobalt SS featured cast and hardened pistons, forged rods, and cast crankshafts.
Eagle and a few others made forged aftermarket cranks for these engines, but I've heard that none are available anymore. The crank in the stock L61/LAP is good for in excess of 500 hp, so unless you go goofy with mods and nitrous, breaking a crank isn't a worry.
I believe the intake on the LAP is the same unit used on the L61 engine, whether the 2.4 intake mod really frees up any usable horsepower is kind of up in the air.
Eagle and a few others made forged aftermarket cranks for these engines, but I've heard that none are available anymore. The crank in the stock L61/LAP is good for in excess of 500 hp, so unless you go goofy with mods and nitrous, breaking a crank isn't a worry.
I believe the intake on the LAP is the same unit used on the L61 engine, whether the 2.4 intake mod really frees up any usable horsepower is kind of up in the air.
Platinum Member
Joined: 01-09-2007
Posts: 16,081
From: SE USA
2008 2.4L
The 2.4L VVT uses Forged C70 Steel connecting rods that are shorter than those in the 2.2L with a stroked cast iron nodular crank.
The 2.4 increases horsepower at least 20% compared to ALL 2.2 applications, yet only weighs 13.2 pounds heavier than the 2.2 (which is the lightest four cylinder GM has ever produced).
The Ecotec 2.4L VVT was built at GM Powertrain's Spring Hill, Tenn., Manufacturing facility
The 2.4L VVT uses Forged C70 Steel connecting rods that are shorter than those in the 2.2L with a stroked cast iron nodular crank.
The 2.4 increases horsepower at least 20% compared to ALL 2.2 applications, yet only weighs 13.2 pounds heavier than the 2.2 (which is the lightest four cylinder GM has ever produced).
The Ecotec 2.4L VVT was built at GM Powertrain's Spring Hill, Tenn., Manufacturing facility
Last edited by sleeper; Sep 2, 2011 at 10:57 PM.
Senior Member
Joined: 07-05-2008
Posts: 5,464
From: Akron Ohio
The LSJ and LNF has Forged Rods and Crank with cast pistons.
I don't think any of the engines are from Springhill right now. THey are all either from Tonawanda NY or Kaiserslautern Germany.
2.2 and 2.4 come with cast pistons, cast crank and powedered rods.
I don't think any of the engines are from Springhill right now. THey are all either from Tonawanda NY or Kaiserslautern Germany.
2.2 and 2.4 come with cast pistons, cast crank and powedered rods.
Platinum Member
Joined: 01-09-2007
Posts: 16,081
From: SE USA
And according to a document ChevyMgr posted "2008 model Year Summary" & I printed 8/28/09, the 2.4 has Forged C70 Steel rods..
(edit): not PF rods..
Last edited by sleeper; Sep 2, 2011 at 11:35 PM.
Deceased
Joined: 06-30-2010
Posts: 25,739
From: Kannapolis NC
When you get right down to it, with the horsepower levels in our normally aspirated engines, the whole cast vs. forged debate it like splitting hairs. In a modded and hyper tweaked 2.0, you might find forged assemblies advantageous, but for the humble everyday 2.2's and 2.4's out there....it doesn't make any appreciable difference in the long run.
