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3.75 stroke. What is the bore size (Im thinking 4.12inch to get 400ci)? I have a XE284H cam in a 10.6:1 360 and it runs fine on 91. As I stated above great cam. W a 5.565 rod, 3.75 stroke, and 4.12 bore I came up w 8.47:1 dynamic and 171 cranking pressure. 8.5:1 is about the highest you would want to go on pump gas w/ iron heads, so you will be fine. Im worried about one of my engines. A aluminum headed .030 over 340 w a custom ground Comp cam. Static is 10.5:1 cam is 54 ABCD putting my dynamic @ 8.9:1 w 185 cranking pressure w a nice tight .35 quench. The short stroke is helping my cylinder pressure and Im going to give her a shot and see if it will run fine on 91.
1st i want to that you for the help, your close on bore, its 4.155 "now", 4.125 stock bore, talked with someone who ran both the 284H & the VooDoo 04 in 2 355s with compression right around 11.1 & liked the voodoo better, he was right there on running octane boost if he wanted to get the timing up around 37-38* on pump 93, i'm going to run the .061" MLS gaskets & get the compression down to 10.4, this will get me in the safe zone.
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