'69 230 build w/LQ4 swap

[Tomguy]

Very nice to see your progress and changes! Did you do any internal work to the G8 engine before putting it in? Cam, stroker kit, etc. or just 100% factory?

[Coasttocoast]

Originally Posted by Tomguy

Very nice to see your progress and changes! Did you do any internal work to the G8 engine before putting it in? Cam, stroker kit, etc. or just 100% factory?

Good question!

Just a few. The L76 engine is somewhat of a 6.0 aluminum block LS3 (vs LS3 being 6.2). It came out just before the LS3 and has DOD (displacement on demand). Basically, using oil pressure, it drops out 4 cylinders at highway speeds. It is sometimes problematic.

I mostly swapped parts from my LQ4 over, including the cam (218/224 .600”/.600” 114 LSA +4 advance), lifters, valve springs, oil pump and Hooker exhaust manifolds. The DOD delete required a new cam gear, chain, tensioner and valley tray cover. And for good measure I ordered new rocker arms that have the roller bearings encapsulated and stronger push rods for the extra spring tension. I had a new engine/transmission wiring harness made and replaced all the engine sensors.

The engine had just over 100k miles on it, I purchased the carfax report and the service records all show dealer serviced for all but the last year when the car changed hands. I pulled the heads and the cylinder walls still show the original crosshatching and no issues. These engines have a history of some higher than normal oil consumption. This is due to how the crankcase is vented into the intake. I purchased the updated valley cover that has better design to minimize this. Intake manifold and heads showed oil buildup from this.

I hope to put on the dyno in the next couple of months, but should be in the 430-440 HP range.

[rwd4evr]

Selling the car!?