PRH's latest activity
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PRH, I am pretty sure you are correct. They even had an article on one with stuck valves and that it needed to be fixed with bronze... -
PRH replied to the thread Pinging B$@&%@rd 440!.None of what’s being discussed so far eliminates the possibility that you’re feeling that the carb is lean at wot isn’t correct. If you...
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PRH replied to the thread Pinging B$@&%@rd 440!.There are countless flat top/84cc Ede headed 440’s out there successfully running pump gas.
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What rpm does it start the pinging? You could slow down the timing curve with heavier springs.
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PRH replied to the thread 5.9 Magnum Street Build - with dyno numbers.I thought Hughes had stopped selling them assembled without the bronze guides. PIE also installs them as standard practice.
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PRH replied to the thread Speedmaster vs trick flow.I ran some numbers for an uncut block and a .040 gasket…….. It’s like 8.8(405) to 9.7(116) If you cut .020” off the deck(4cc) you end...
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PRH replied to the thread Speedmaster vs trick flow.9.5 to 10.5 Just find an on line compression calculator and start crunching numbers to see where you’re at.
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PRH replied to the thread Pinging B$@&%@rd 440!.You said you can feel the difference…….. cylinder pressure is where that comes from. Currently you don’t have enough octane for the...
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PRH replied to the thread Speedmaster vs trick flow.Between the different valve pockets and shorter CH of the 405 pistons, it’s about a 10cc difference in the compression calculation……...
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PRH replied to the thread Pinging B$@&%@rd 440!.That boost of power your feeling is from increased cylinder pressure……. Which is likely inducing the knock.
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PRH replied to the thread Pinging B$@&%@rd 440!.Was the cam degreed in? Have you done a cranking pressure test? Have you tried adding some 100+ octane gas to the tank to see if it...
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PRH replied to the thread Heads for 440.The flow was better when Jeff was doing them. I’ve only had one of those here…..years ago. I wanna say the big number was like 312 on my...
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PRH replied to the thread Heads for 440.Ootb Stealth numbers from my bench, tested @28” on a 4.375” bore- Lift—— I/E .100—-67/51 .200—144/102 .300—207/135 .400—245/159...
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Yes, I will definitely be heading back to the dyno after the repair. We were just getting to the fun part lol. Glad the valve hung up...
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PRH replied to the thread 5.9 Magnum Street Build - with dyno numbers.Yeh, EQ heads without guides are a pretty risky proposition. I refreshed a set of used ones several years ago. No stuck valves, but...