Quote:
Originally Posted by Excaliber
Something not commonly known about the side oiler vs center oiler block, which share the same bore size. The side oiler bore is "notched" or "relieved" at the top to unshroud the intake valve and improve flow. The center oiler block is not.
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Ernie,
With all due respect, some things you say (whether by design or misinformation) are just not true, heresay, or junk science.
Here is my
STANDARD BORE SO, torn-down for installation of my then new STAGE II Shelbys. This is NOT a notched block. My previous iron MR's were modified with 2.250's and 1.75's-same as the new Shelbys. My machinist did not notch the block as it was not necessary for clearance. The location of the valves in the chamber cleared the bore walls as does the Shelbys.
That's red Dykem I applied, installed the head without gasket and cycled the valves. The valves both I & E are not shrouded by the bore. The only blocks I've ever seen which required notches are the 4.13+ overbore 428's and smaller 390 blocks--which would carry 2.19 and bigger valves. Even Cammer heads do not require block notches. Further, I had several conversations with Mike LeFevers who R&D'd these heads and he assured me there was no need to notch the block-which is why I bought them-a straight bolt-on.
Quote:
Originally Posted by Excaliber
As I mentioned earlier, High Rise heads will flow 290 cfm (500 lift, CONSIDERABLY more with higher lift). Shelby STAGE TWO heads will flow 293 cfm.
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JUST WRONG. Here is the Shelby spec sheet which came with my
STAGE II heads. (Yes, I'm yelling). I apologize for the small scan-I don't know how to get it better. See right side data panel.
The
STAGE I head intake flows 283 @ .600-
THE STAGE II IS 320 AND 235@ .600.
I respect that you have built and rebuilt your own motor but I, like several others have expressed, do not believe that a
427 sized FE with Hi-rise heads, 13.5:1 and 2 660's made the famous 667 HP.
Given your above statement that (your?) Hi-risers flow(ed) 290@500-you would need a near .700 lift solid roller with 7000+ RPM capability and heads that flowed ABOVE 360 to achieve that 1.6HP/CI output. The pro builders on here with CNC programs for the EDE head are achieving 320-340cfm to mate with
482 inch combinations and juice rollers with lifts in the low to mid .600's. They regularly produce 600-630HP for their customers. It takes Blue Thunders at 360cfm+ to achieve the numbers you claim.
I also question Rod's reference source Jay Zolko believing he can achieve 800HP with Kuntz' head needing .950(!) to achieve 360cfm. Yes it didn't nose over but came from 315@.600. Kuntz is a wizard-I have seen his SBF custom head flow .408@ .800 at 28" on a SuperFlo without pipe.
Ernie- this thread had become a defensive p!ssing contest between you and the rest of the world. I'm just saying-if you continue to defend doubtful positions, please provide solid evidence to straighten us all out. And back your statements with facts-please.