Currently taking an l33 out of my Miata and replacing it with an ls1. The l33 has an ls2 intake with a cable throttle body. While removing it, the chain broke the schrader valve off the end of the fuel rail. Upon inspecting the intake, I also noticed the previous owner tightened the bolts so tight that it deformed the plastic that the bolts go through, as well as the intake ports on the manifold. I don’t have the cash to buy another ls2 intake and I can’t find any used ones for a decent price. My question is, if I keep the stock ls1 intake manifold and just change out the throttle body to a cable instead of dbw, how much will I lose compared to the much larger ls2 intake


and will it be noticeable? I’m running long tube headers, tsp cam, and a tune.

 

Probably lose 5 hp or so.