My stock ls2 short block recently went out due to my oil pump busting...or something else causing it to break. In any case, the bottom end is locked up and I am now in the market to go bigger and better of course. I've been looking at doing something different than just the usual 402 ls2 short. I know this is probably the best overall choice. What about the using an ls3 short block though? Is it also a direct bolt-in other than plugging the oil hole?
The ls3 seems favorable because of more displacement (418vs402) plain and simple. Any draw back though?
I also considered the 4.1" stroke over the 4" but I don't see alot of people running them...must be a reason.
I will be sticking with my AI 243 heads, fast 92, 4000 stall,etc,etc. The only thing I will switch is my 234/236 cam for something more optimal for the bigger motor. I know...the 243's aren't optimal either, but I have to stop somewhere!
__________________ 05 GTO - TSP 418, DuSpeed, 102/102, TX Giant cam, AI 243 heads, Kooks 1 7/8, Kooks SSE, ATI UDP, Pedders drag springs/shocks, Gforce DS, FTI4000 and performabuilt2.
Not really. I may add a small nitrous shot to once I leave Hawaii3 years from now.No track here so no point. I just want a torquey strong running Gto with stock gears and all the parts I'm using now....except cam. I'm not looking to set any records on a dyno...they all read differently and I have an auto anyways.
Both would get you what your looking for but an LS3 418 would be a great choice if your looking to make slightly more power and to have something a little different than the typical 402 setups in the GTOs.