jp98

iTrader: (2)

Can you tell the difference between an ls1 and a ls2 by looking at them?
the engine is in the car, seller says it is a 408ci now, but the first time we talked he said it was a 383ci.

G Atsma

Not very easily, especially if they are not original. IF it IS original, the LS2 would have drive by wire throttle body, as opposed to one with a pull cable, as LS1's are.
The LS1 is Gen III, where the LS2 is Gen IV. What kind of car is it in?

01ssreda4

iTrader: (96)

ls2 is 4 bolt TB stock, but its not hard to swap stuff around.

00pooterSS

iTrader: (40)

I'd be really concerned it could be neither if he can't keep up with what he says.

Links below should tell you everything.
-Knock sensors on LS1 in valley cover. On LS2 on side of engine
-Cam sensor on LS1 at rear top of engine behind intake on LS2 in timing cover
-LS2 stamped 6.0 on block
-I think but not sure, I believe the LS2 valley cover has a tube exiting the front like the LS6. I could be wrong, really old braincells being tapped into there.

https://ls1tech.com/forums/generatio...n-ls1-ls2.html

https://www.corvetteforum.com/forums...ac-arrest.html

jp98

iTrader: (2)

It is in a 2003 Z06, I should be able to check the cam sensor location.
thanks

Tuskyz28

The LS2 should have 243 head casting and 6.0 stamped on the block.

2ToeRacing

iTrader: (5)

I wouldn't buy from anyone that didn't know what was in their car. You said he keeps changing his mind. Unless its a ripping deal regardless what motor is in it. Run farest run!!

G Atsma

^^^^^^This!^^^^^^