FrontEngineDragsters.Org Forum

Technical => Spud Miller's Cave => Topic started by: crider on February 26, 2017, 03:05:50 PM

Title: CFM of hilborn injection
Post by: crider 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

Title: Re: CFM of hilborn injection
Post by: dreracecar 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

Title: Re: CFM of hilborn injection
Post by: crider 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