LQ4 into a 3rd Gen/1972 Nova by frojoe

3 minute(s) of a 891 minute read

Looks like $2250 USD + core cost for ERL to do their sleeving magic for their smallest/most basic machined bare block setup.. adding up to $4000 USD for a sleeved 4.125" bore machined LS3 based off a used core that they source. For me, if I were to go the route of purchasing a block it'd have to be GM as the value for me just isn't there for aftermarket anything at several thousand dollars more expensive

No et goal as I'm not a drag racer, but hp goal is obviously just moar. I'm happy to fabricate and replace pretty much anything on the car down the line, but pulling engines to rebuild is about as low on my list of likable tasks as it can possibly get.  

I figure I may as well go bigger now while I'm at it, to support futuremods.  Turbo will be iffy but I can reevaluate that later.. at least spool will be quicker. I'm leaning towards keeping the LQ4 block and boring 0.030" as it's pretty much a sure thing, and that extra $1k will go a long way towards that stainless 3.5" oval dial exhast I still need to make. In the end, if I happen to end up with an engine bigger than Marktainium's.. even if just by 0.5cid, then that's a win.

12-21-2016

Engine is currently a 365cid 4.005" x 3.622" rebuild with Wiseco -11cc pistons, Compstar H beam rods, Eagle forged crank, Patriot springs, Comp pushrods, LS9 head gasket, Tick custom grind medium turbo camshaft, and ARP 2000 everywhere. So I'm familiar with building it, and I'm not trying to do things on the cheap, more like just cost-effectively/realistically, while still building it a bit bigger for the future. I think I'm prettymuch sold on keeping the block, and stroking to 4" and boring it to between +0.010" and +0.030".. haven't decided that yet. I like the idea of more hp with the boost lowered a bit, and even more hp with same boost as now (16psi).

I'm in talks with my boss's previous employer, which builds turbos locally and can get wicked deals on Garrett direct or hybrid turbos. One regular direction GT3582 and one reverse direction GT3582 may be in my future.

12-23-2016

Hah Jimbo.. we're good friend, but not THAT good of friends.

Did some screwing around looking at turbo stuff tonight, for a 408cid enginewith a pair of Garrett GT3582 turbos (66mm inducer compressor wheel), I drew a theoretically-perfect line thru the compressor map to reverse-calculate the required boost-per-rpm for those turbos on a 408. Purely looking at the cold side/compressor airflow, they seem to be a good match for the 408 efficiency-wise for realistic boost and pressure ratio (AKA boosted charge air temp)..