OK I know there are quite a few guys in here that REALLY know LS's... far better than I...
So looking for some opinions and advice on what I am thinking for my track Miata... I'm not after an HP monster as its not needed... and having lower torque is actually an advantage to not spinning the car at every fucking corner.
De-stroked 6.0 back to a.......5.3 LOL... basically to slow piston speed down when trying to rev it to 7500ish...
To rev to 8k+ seems to require a dry sump and a really really stout top end...7500 is a different ball game and much easier to attain... 7k is childs play. Not trying to kill myself financially with this build, but im not seeing any pull outs that are "cheap"... an aluminum 5.3 pull out is like 2500-3k with 150-200k miles on it... and I would still probably want to do bearings and rings and any truck pull needs a car intake manifold for my swap...plus an oil pan... so I have been contemplating building something "low dollar" from a bare block.
6.0 LS block, probably an L76 block as thats what's available without spending way to much on a fucking bare block. Can get one for like 600 bucks. Obviously needs a DOD delete valley plate, but every block I look at doesnt have any valley plate so 70 bucks solves that.
4.8, 58x crank. Will get some cheap OE crank from a dismantler and have the machine shop polish everything and balance it.
4.8 GM rods... they will definitely withstand the HP levels I am after.
6.0 pistons... cheap is used GM, probably ok for me with new rings. Summit has some decently priced forged pistons, but I dont know that they are needed at the power level I am looking at, BUT the resistance to detonation damage is enticing... I only want to run 93 as its easy to get, but E85 is in the cards, just not readily available at every track I go to so...
821 LS3 heads... some kind of dual springs, depends on the cam obviously... titanium valves... was thinking Titanium intake and GM LY6 Inconel exhaust, but I dont think the Inconel is needed for an N/A motor and the lighter titanium is probably where I want to be for valve train stability at high RPM anyway... Mast makes both titanium intake and exhaust for a decent price... Titanium retainers...
Morel solid roller lifters. Would love Johnsons, but they are real proud of their shit...2x + as expensive as morel's.
Yella Terra roller rocker arms... these are "cheap" and are bolt on... I dont really want to get into much machining of the head or anything like that for shaft mount rocker system or anything crazy... These arent the lightest solution, but its bolt on... ~600 bucks... I mean shit a CHE trunion bushing kit for factory rockers is north of $200...and you are still dealing with GM rockers side loading the valves...
Cam... I have a few contacts on getting me a cam setup. I prefer cam-motion cores so... Looking at BTR or Tick or have a local place(Horse Power Research) that does good shit and I know what of the guys there.
There's obviously a bunch of ancillary shit that goes on a motor, but that stuff is less about options and more about "this is the only thing that fits"... Mast oil pan, LS3 intake manifold, GTO exhaust manifolds(or high dollar V8R headers), etc...
Planning to run it all on a Terminator of some sort.