Lance,
how large of a throttle body do you offer for the LS engines, and what cfm do they flow?
Advantages, all of the above, plus looks are killer. Disadvantages can be not flowing enough air on a high cfm naturally aspirated combo, having to plumb map, IAC, etc. lines to each port and then to a ,common plenum of some sort, and cost. Of course none of these is that big of a deal as I loved my IR setup.
I only ask about the airflow as that happened with my Hilborn setup. They use 2 1/16 throttle blades which sound large, but they flow under 300 cfm even at that size. With an IR setup you don't have a common plenum to "borrow" from, each runner is individual with it's own throttle blade, and so whatever that can flow is it. Now you have a set of AFR or ET Performance CNC heads that flow 340-350 cfm out of the box and you can see that too small of an IR setup will cost power on a n/a setup. Forced induction not so critical as the air is compressed.
Bottom line, it's a very cool way to go, just make sure the airflow suits your needs.
Jody
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