are the stock rods in our motor forged? the gm build book says they are only rated for 250hp? any truth to this?

 

i know the crank is "forged steel" and the pistons are "heavy duty" atleast thats what the site says

 

well i know theyre rated to handle more than 250hp..the pistons may not be, but i know the rods are

 

I'd be very, very, surprised if the 2.4L has a forged crankshaft......that's some pretty serious hardware.

 

well i know the crank isnt forged...my prime concern is the rods/pistons

 

The SS/SC's rods are forged...as for the 2.4L.....I'm not 100% but I don't think they are......

 

i'm pretty sure the rods are forged , the crank is not

everythings "rated" to 250.. but that was from a big shot of nitrous.. so it isn't the same as boost

 

thats true...i think its more dependant on how you treat the car

how big of a shot

 

Yes the Rods are forged... The crank shaft is not but the pistons are curved and oil cooled to reduce friction. Lol i talked to bill hahn for an hour on his 2.4 solstice turbo build.

 

yea i thought thats where i got my info from but i didn't want to say that and be wrong lol

 

what allows the pistons to take so much power if theyre rated so low?

 

They were forged in the fires of mt Doom and are imbued with Magic runes that give them a +3 to not breaking @ least thats what it says in the owners manual

 

way to be a douche troll

 

I doubt they are... because the build book suggests you have to upgrade them at the same power level as for the 2.2 ones.
Plus as they are the exact same size and length as the 2.2 ones, I won't be surprised they are exactly the same ones

http://tunersource.gmblogs.com/Racer...06appendix.pdf

 

Doesn't the 2.4L have a slightly bigger cylinder bore than the 2.2L?

It was funny, settle down.

 

was never riled up...

 

yes they are forged.. i some how stumbled on an sae file with the 2.4 specs in it

Type: Ecotec 2.4L I-4
Displacement: 2384cc (145 ci)
Engine Orientation: L ( longitudinal ) T ( transverse ) L / T
Compression ratio: 10.4:1
Valve configuration: dual overhead camshafts
valves per cylinder: 4
Assembly site: Spring Hill, Tenn.
Valve lifters: hydraulic roller finger follower
Firing order: 1 - 3 - 4 - 2
Bore x stroke: 88.00 x 98.00mm
Fuel system: sequential fuel injection
Fuel Type: Premium recommended not required

Block: cast aluminum
Cylinder head: cast aluminum
Intake manifold: composite
Exhaust manifold: high silicon molybdenum, cast nodular iron
Main bearing caps: aluminum bedplate
Crankshaft: cast nodular iron
Camshaft: cast nodular iron
Connecting rods: forged steel
Additional features: extended life spark plugs
extended life coolant
electronic throttle control
variable valve timing
unitized exhaust manifold/catalyst (G6)
dual converter system

 

good find man.

is there anything like that for the LSJ?

im sure if i googled it i'd find it though...

 

yea they actually had it for all the models i'll see if i can find it again and maybe i'll post it in the perf section

 

what do they mean by dual convertor? I thought we only had 1 cat.

 

that depends on where you are.. those are also 08 specs.. but the engine internals shouldn't change

hmm i can't seem to find the 2.2 and 2.0 ones

 

where'd you find that at? for some reason I remember seeing that the 2.2, 2.4 and 2.0 all have forged rods

oh nevermind I see above u couldn't find the other two

 

HAH! forged rods in the 2.2 my ass!!

 

it's at
http://media.gm.com/us/powertrain/en...tec/08_LE5.xls

ok i found the one for the 2.2... technically it's forged but they're forged powder metal instead of forged steel like on the 2.0 and 2.4..

the one for the lsj is being tempermental right now but i'll make a new thread

 

Search for this title on gmtuner source, 104742-enginehandbook-complete-web and it says specs about the 2.2 on page 83 (the book page). It never really says if the rods are forged, it just talks about upgrading them and they are good to 250hp It says the crank is cast.