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Discussion Starter #82

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Ran across this 350 build with a alum. 4bbl intake and 500 cfm 2 bbl., interesting.

I think that can be bettered by a bit. But that’s just me.
 

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Discussion Starter #84
I roughed the one from the magazine into pipemax and it shows that it's sucking on that 4412 2bbl pretty good, lol.

356.881 Cubic Inches @ 6200 RPM with 95.00 % Volumetric Efficiency PerCent

Required Intake Flow between 189.3 CFM and 199.5 CFM at 28 Inches
Required Exhaust Flow between 129.8 CFM and 146.4 CFM at 28 Inches

600 RPM/Sec Dyno Test Lowest Low Average Best
Peak HorsePower 378.3 393.9 401.6 409.4
Peak Torque Lbs-Ft 355.3 369.9 377.2 384.5

HorsePower per CID 1.060 1.104 1.125 1.147
Torque per Cubic Inch 0.996 1.036 1.057 1.077

BMEP in psi 150.1 156.3 159.4 162.5
Carb CFM at 1.5 in Hg. 608 677 711 745

Target EGT= 1371 degrees F at end of 4 second 600 RPM/Sec Dyno accel. test
Octane (R+M)/2 Method = 96.3 to 99.4 Octane required range
Air Standard Efficiency = 61.94341 % for 10.800:1 Compression Ratio

Peak HorsePower calculated from Cylinder Head Flow CFM only
600 RPM/Sec Dyno Test Lowest Average Best Potential
Head Flow Peak HP = 334.7 409.7 484.7
 

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Discussion Starter #86
Finally got finished but could not get any "real" dyno numbers out of Jim, but he did say it made as much as a 604 crate engine with a 750 holley, and that it peaked just below 6000 rpm with peak tq. at 4500 and that they took it 7000 rpm on the dyno. Almost forgot, it was pulling 3.5 or so inches of mercury.
 

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your engine sounds good in the dyno vid , eager to get down to business . I can understand not posting a customers dyno numbers , from what you did let on sounds like the power curve is similar to the crate 604 with a 750 . interesting given the difference between the two different top ends and cams 👍 does the track run the two different engines in the same class ?
 

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Discussion Starter #90
No I do not think they do, but if I find out different I'll let you know. The thing about the 604, it depends on who you talk to on how much HP they make, and even though they are a "sealed" engine some guy on Speed Talk was claiming 550 for his supplied engine over 10 years ago, no one believed him but it went on for pages, lol.
 

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with the pos emission cam in the 604 and less comp was thinking it might be close even with the bigger heads , sp intake and 4 bbl carb . bbf612 550 lol even if it could the rods wouldn't take it .
 
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