LT4 Vs. LS9

[rpol78]

My understanding is you have more ECM options with the LS and more options for making changes. I do like the LT4/LT5 engine with the direct injection. It just depends on what you want to do in the future.

Originally Posted by thedugan

Jeeze, LS9 short blocks are worth big bucks these days....

https://sdparts.com/i-24507973-chevr...ong-block.html

I hope it's just a typo where the 9 key was sticking.

Hmmm... Makes me wonder what my LS 396 engine is worth (LS9 block/LS9 CNC heads, Callies Magnum custom crank, Callies Ultra rods, JE custom pistons, Kong 2650).

FWIW - This is going in a '67 Chevelle.

[colorado80439]

Originally Posted by rpol78

My understanding is you have more ECM options with the LS and more options for making changes. I do like the LT4/LT5 engine with the direct injection. It just depends on what you want to do in the future.



Hmmm... Makes me wonder what my LS 396 engine is worth (LS9 block/LS9 CNC heads, Callies Magnum custom crank, Callies Ultra rods, JE custom pistons, Kong 2650).

FWIW - This is going in a '67 Chevelle.

Very nice, Kong 2650 LSA blower on an LS9, with a dedicated SC pulley who's front runner is that?

[rpol78]

Originally Posted by colorado80439

Very nice, Kong 2650 LSA blower on an LS9, with a dedicated SC pulley who's front runner is that?

Thx, It's the GM modified LSA accessory drive 19417908. It has the same spacing as the corvette accessory drive with the LSA SC pieces added to it. Unfortunately it doesn't look like it's available as a kit any more.

I ended up having to use the Holley A/C compressor mount with a Sanden SD7B10 since I couldn't get a GM compressor to clear the main cross member. I'm still trying to work out the A/C lines on it.

[colorado80439]

Ended up going this direction