Re: CNC Ported Iron heads
[Re: Brian Hafliger]
#1557039
01/05/14 02:08 PM
01/05/14 02:08 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
The thing that bothers me about the Eddy victor BB head is no headers work on the tall deck...I know some headers can be made to work, but a lot of guys like to bolt on headers and go...
The Victor's exhaust port location is identical the MP Stage VIs (I've lined up both heads side by side to confirm this). I have TTI's 2" B/E-body headers for my Challenger that I used w/ my old Stage VIs and it'll be a bolt-in / no-change-required installation when my Victor-headed RB 452 goes back in w/ the TTIs.
The TTI 2" w/ Victor or Stage VI heads are actually a better fit clearance-wise than my previous Hooker 1-7/8" Comp headers w/ OEM iron heads. The only downside is that the starter is captured by the routing of the tubes, requiring the driver-side header to be loosened up and pulled away from the engine to remove it. "Been there, done that."
Also, TTI says their 2 to 2-1/8" Indy RB step header will also work, although I haven't looked into all of TTI's footnotes re: the application w/ Victor or Stage VI heads. I know the standard 2" header is a "no brainer" in my case and don't feel any need to change. I'd actually like to have seen a 1-7/8" to 2" step design offered, but that's just me.
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Re: CNC Ported Iron heads
[Re: mopster]
#1557040
01/05/14 02:22 PM
01/05/14 02:22 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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I'll probably pi$$ off somebody here, but for this sort of application I think some of you are getting way too hung up thinking Brian's heads having FPS readings being too high and exceeding their "theoretical" max flow limits. Is it "better" if your port design results in measurements that fit within these ideals? Probably. Is it going to kill the head's performance if they don't? Nope. Example: My old Stage VIs were only 213-215cc ported, had a standard 2.20" x 1.20" entry w/ a pinch significantly less than that due to the nature of the port. They flowed 305+ at .600" and made over 600 HP on a pump-gas 440 (10.8 CR) w/ a .600" solid flat-tappet cam. That was enough to push my 3755# (w/ driver) street car to 10.5s at 126 w/ a full exhaust on DOT tires. FPS? Almost 400 over the short turn. Yeah, it would have been nice if the air speed was more in line w/ the ideals and "should" have performed better if they were. But that's what they were AND how they performed, regardless. This ain't Pro Stock stuff here...
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