Ls2 418 or Ls3 418

[speed3marine]

I own a 08 G8GT and looking a crate engine to swap. My goals is to have a 700 - 800whp car and my question is, which one should i get? Im planning on also adding FI and dont know which one yet.

[travis gore]

LS3 has better heads and intake

[speed3marine]

How much hp does the engine puts out w/o FI?

[gr8lover]

I didnt think it would be safe to do a LS2 418..... is it?

[laserred]

Me neither, but the only way I can come up with 418 ci is 4.03" bore and 4.100" stroke. Neither dimension is a good idea with a factory LS2 block.

[Devilish34]

I didnt think it would be safe to do a LS2 418..... is it?

This

[Robert@KBXPerformance]

If going with LS2 based engine then keep displacement to right around 400ci for FI. If going LS3 based engine then you can go upwards of the 4-teens area for FI. Both LS2 and LS3 based combo's are easily capable of making 700-800rwhp with FI. You don't need the few extra cubes to hit it either. I plan to make right around 800rwhp in my car and am only running a built 402 and TT's. The 16 extra cubes cannot hurt, so if you want them then do it with an LS3 based combo.

[speed3marine]

I was thinking more of buying TSP 416ci LS2/L76 or TSP 418 ci L92/LS3 keeping my stock L76..

[Robert@KBXPerformance]

I was thinking more of buying TSP 416ci LS2/L76 or TSP 418 ci L92/LS3 keeping my stock L76..

The big deciding factor here is that you plan to go with forced induction and bigger hp. Of the two choices you just posted the LS3 418 would be the better choice for the path you plan to take.

[gr8lover]

I was thinking more of buying TSP 416ci LS2/L76 or TSP 418 ci L92/LS3 keeping my stock L76..

I think most people will agree that a 416 LS2 is not a good choice... you could probably do it, but chancy!!!!! I wouldnt go more than 403 or so on a LS2..... LS3 is a different story...

if your going to spend a bunch of money dont go cheap and then you will worry later on..... just an opinion,,,