the adds are a bit annoying but the proof is in the pudding. I think its a great combination for someone who wants the power of an LS with the familiarity and ease of install with the tried and true sbc. With the setup they had they got to at least 500hp/500lb/ft at the crank in their dyno testing
It is interesting. I bet all the adapters are expensive. It makes me ask why? The LS is a great engine design. The sbc is a great engine design. If a person wants the performance of 15 degree heads - order some for your sbc. I bet the dedicated intake and heads are a lot less money than the hybrid kit. Want 500 hp in an LS motor? It's easy with factory parts from a U-pull it and the cheapest way to go. Thanks for sharing this video. It is interesting to see that someone actually went to all the trouble to adapt the 15 degree LS heads to a standard small block.
Originally posted by woodyhere: Thanks for sharing this video. It is interesting to see that someone actually went to all the trouble to adapt the 15 degree LS heads to a standard small block.
Standard small block it is not. It's a custom cast iron LS block, with the bottom end machined to match a 4-bolt SBC. So you can bolt LS heads and intake to it, but you get a weaker bottom end with only 4 bolt mains, and an oil pan design that is more prone to leaking.
Interesting and would be kind of cool in a Muscle car app - the Motown Block from World Products is 2300 and change and the Block Adapter kit (required to use the LS style heads) is 650 so 3k just for the block. Another 2k plus for the heads. Cam, Crank, rods, pistons, intake, etc. This is easily a 10k plus motor. I think that you could do the same swap in a Fiero with a complete LS or an LQ9 for less? A crate LS7 with forged internals - 550 HP complete can be had for 8 to 9k. LS3 - drop outs with low miles can be had for 5 to 6k - with some "tweaks", 500 plus HP is easily achieved. Prices for these LS motors are coming down. I don't see an advantage to build this motor for a Fiero other than, it makes the swap a little easier but definitely not cheaper.
It would be cool in my 70 Monte though - just for fun and something "different".
Probably not due to cost. Many show cars will spend more than $10K on an engine. I've seen plenty of engines that cost that much at car shows. More likely would be that it just doesn't make sense. If you really want to run a distributor and carb on an LS engine, there are kits for running a distributor on the front of the engine, some even made by GM.
This SBC/LS hybrid block is really meant for circle track racing classes where an SBC is required, but the racers want to run with an LSx top end to make more power N/A, with the class-restricted carb, oil pan, and displacement.