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<blockquote data-quote="vegasloki" data-source="post: 1762231" data-attributes="member: 38666"><p>It's not too different than how they are doing it in Cup.&nbsp; There is still a fixed curve/program in the ECU but they are a bit more flexible with the other components.&nbsp; IIRC the only spec sensor is the O2 and there is a spec throttle body.&nbsp; The other sensors AFAIK are not mandated nor is the loom.&nbsp; Indycar is similar.&nbsp; The builders then build around the fuel delivery package.&nbsp; It's likely to be a different approach than what those that aren't building ECU based engines are using.&nbsp; I had the same sort of change when I went from stock cars (spec carb/stock intake) to sports cars (stock everything with few, tight mods).&nbsp; There are still ways to <s>cheat'em up</s> enhance the performance relative to others using the same package. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite12" alt="o_O" title="Er... what?&nbsp; &nbsp; o_O" loading="lazy" data-shortname="o_O" />&nbsp; These days I'll take EFI over a carb for racing any day of the week, even with the learning curve.</p></blockquote><p></p>

[QUOTE="vegasloki, post: 1762231, member: 38666"] It's not too different than how they are doing it in Cup. There is still a fixed curve/program in the ECU but they are a bit more flexible with the other components. IIRC the only spec sensor is the O2 and there is a spec throttle body. The other sensors AFAIK are not mandated nor is the loom. Indycar is similar. The builders then build around the fuel delivery package. It's likely to be a different approach than what those that aren't building ECU based engines are using. I had the same sort of change when I went from stock cars (spec carb/stock intake) to sports cars (stock everything with few, tight mods). There are still ways to [S]cheat'em up[/S] enhance the performance relative to others using the same package. o_O These days I'll take EFI over a carb for racing any day of the week, even with the learning curve. [/QUOTE]

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