Lq9 build
Just an update, I put the engine together and got it in the car. It's running great, I just need to finish the fine tuning. I found a LS2 base tune on the Holley Dominator software and brought it over to my terminator software.
Cliff notes for anyone who didn't read the older posts: LQ9, 862 heads, SUM-8715 cam kit, .048 in. headgasket, 7.425" trickflow pushrods, SUM-700340 converter. I also went through the engine and did lifters, bearings and rings.
The car pulls pretty good but I am still breaking it in so I haven't really beat on it yet.
Cliff notes for anyone who didn't read the older posts: LQ9, 862 heads, SUM-8715 cam kit, .048 in. headgasket, 7.425" trickflow pushrods, SUM-700340 converter. I also went through the engine and did lifters, bearings and rings.
The car pulls pretty good but I am still breaking it in so I haven't really beat on it yet.
The LQ9 engine typically comes with flat-top pistons and a relatively high compression ratio. Combining this with the 862 heads, which have smaller combustion chambers compared to other LS heads, can result in even higher compression. This can be a concern if you're using pump gas, as excessively high compression can lead to detonation and engine damage.
To address this issue, you may need to use a thicker head gasket to decrease the compression ratio or use a set of cylinder head gaskets with a larger bore size to decrease compression slightly.
Camshaft Selection: Since you mentioned that you're limited in how big of a cam you can use, you should choose a camshaft that is compatible with the compression ratio of your engine. This will help ensure good low-end torque and drivability for daily driving.
Consult with a camshaft manufacturer or engine builder to select a camshaft profile that matches your compression ratio and intended use.
To address this issue, you may need to use a thicker head gasket to decrease the compression ratio or use a set of cylinder head gaskets with a larger bore size to decrease compression slightly.
Camshaft Selection: Since you mentioned that you're limited in how big of a cam you can use, you should choose a camshaft that is compatible with the compression ratio of your engine. This will help ensure good low-end torque and drivability for daily driving.
Consult with a camshaft manufacturer or engine builder to select a camshaft profile that matches your compression ratio and intended use.
