Road race L92 Build
 

I roadrace a C6 Vette and needed a new LS3 for it. I found a refreshed L92 and had it gone through again with some small highlights:
- ported the exhaust side only
- valve job
- decked the heads (62.4cc)
- LS3 intake valves
- stock bottom end (376ci) with deep eyebrows in the pistons (2.3cc) so no valve contact
- 11.21 compression
- pump gas
- BTR custom roadrace cam, springs, pushrods etc
- Stock LS3 TB and intake (untouched)
- 16lb clutch and flywheel
- Dry Sump oiling system
- LG Super Pro 1 7/8 headers to 3" X and 3" out the back (no cats or mufflers)
- Cam is 23x/24x, almost 600 lift, 111+4, HUC lobes. Car has stock 3.42 Z06 rear gears and trans.

505RWHP SAE was the target and we got there with 480rwtq. I'm impressed! :)

First test is this weekend, praying it stays together for the maiden voyage ;) Thought I'd share. I think in a typical street car this would not do as well on a dyno (clutch/exhaust/drysump help). The clutch alone gained me 11rwhp from the stock C6 Z06 clutch just for reference. Let me know if you have any questions..

That's a stout engine! I like that it carries the torque and horsepower at nearly peak for such a large part of the RPM range. Torque curve is broad and flat like a table top. Looks like a fun engine that would be a hoot in a street car as well. The tight LSA 111+ 4 cam sure seems to be a good choice.

Looks good.
Power will carry a bit further if you change to a RCR modified inlet manifold.
On our LS3 the manifold change required the limiter to be lifted 100rpm and pulled a consistent extra 1mph in the quarter.

Beautiful torque. What dry sump system?