Either way, if you'd take all the money you put into building your NA motor, you could have left it stock & boosted if for MUCH less and made MORE power
skunk2s 330whp na rsx runs 9.6s, matt Keller ran 9.4 with 1000whp turbo
250whp crx runs 11.5-11.6s , almost no turbo car runs that fast with that little power.
Turbo is cheaper to achieve higher power numbers IN general. And it takes no skill
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