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Author Topic: CFM of hilborn injection  (Read 2903 times)

Offline crider

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CFM of hilborn injection
« on: February 26, 2017, 03:05:50 PM »
Almost finished gathering parts to put a real engine together for my car. I have picked up a hilborn stack injector for BBC, 2 7/16 butterflys, and I was curious as to how much air it is capable of moving. Anyone know the CFM of these units? Numbers per runner? Going on a 604" with heads that are doing 410 cfm at .700 lift
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dreracecar

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Re: CFM of hilborn injection
« Reply #1 on: February 26, 2017, 04:40:37 PM »
At least 410 cfm per runner. If you cut a 2  7/16  circle and it covers most of the port your fine
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Offline crider

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Re: CFM of hilborn injection
« Reply #2 on: February 26, 2017, 05:21:18 PM »
Ok, Thanks Bruce. I wasn't sure how much the dogleg in the runners hurt flow of the manifold
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