| : How much power do you think a 24x11x3.5" core can flow efficiently? Please be honest. per your profile, you want 800 rwhp. Assuming this HP taget is without NOS, the required CFM is roughly 1.5 times the crank HP. Assuming a 17% driveline loss, 800 RWHP = roughly 963 crank HP. Thus, the estimated CFM required at this level is 963 X 1.5 = 1444 CFM, or 722 CFM per turbo/IC core. Each core of the Apollo is 5.5" tall by 3.5" thick by 24" long. At 1 psi of pressure drop, a core of this dimension will flow roughly 165 CFM. Your required flow per turbo/IC core for your desired power level is 722 CFM. Do you see a problem here? I do. Per one of my previously stated assumptions: Airflow drag (pressure drop) through the core is proportional to the air flow squared. (722/165)^2 = wow. 19 psi pressure drop? holy damn. Seems like there is no way possible to reach your goals (without NOS) with a core of that dimension. I know it sounds unbelievable. But the real world data I have received so far have supported my calculations. Where have I received this data? Believe it or not, from UAS themselves. They acheived between 3 and 4 psi drop on a 350 rwhp Z. You have much higher cfm requiremnts and a much bigger turbo setup (they were on stock turbos AFAIK). Honestly, in your case I would recommend a custom FMIC with core dimensions big enough to support the potential of your turbos. I know you are probably stunned that I didn't suggest Stillen SMIC's. Or any SMIC for that matter. Why? Because it would be difficult to fit a core that big in a side mount location with stock piping orientation. Please don't misunderstand me. It is very possible to have a good functional FMIC. However, in your case, I think you will need a custom unit to support your flow requirements. Any of the commonly available UAS style FMIC's won't be able to handle your turbos imho. Back to your original question..."How much power do you think a 24x11x3.5" core can flow efficiently?" Defintely not 800 RWHP using real world conditions (ie not icing down the core, huge NOS, etc). If we assume that anything over 3.5 psi is inefficient, then the max CFM this IC can flow total is about 620 CFM. This equates to roughly 411 crank HP at 3.5 psi drop. Can you get more HP than this? Definitely, but not without more pressure drop. How much power can you make? I don't know. That depends on how much boost pressure your turbos can tolerate before they choke IMHO, dynos only tell the end result: RWHP. They don't give much info into what it takes to get there. Sure its possible for an efficient IC and an inefficent IC to obtain the same RWHP numbers. Without pressure drop measurements, RWHP numbers are more or less meaningless at telling how good an IC is.
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