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Power Strokes
6.4 Aftermarket
Max EBP before needing a wastegate
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[QUOTE="B585Ford, post: 311409, member: 5497"] I agree that air and fuel are what causes high EBP, but unless I was mis-interpretting what Newstroker was saying (this was my question anyways), he wasn't asking if the stiffer valve springs cause more EBP themselves, but rather when he gets very high EBP whereas factory valve springs would not completely seal (when closed - I thought their rating was somewhere around 70 PSI) on the exhaust valves because the EBP was overcoming the valve spring ability to close the valve (i.e., he was getting slight valve float from the high EBPs), his stronger springs completely eliminate ANY valve float causing EBPs to be a little higer than it would have been because no exhaust gases were leaking back into the cylinder. I suspect that even if the valve float slightly reduce EBP, the effect would be pretty minimal. I know I don't ever want valve float so valve float would not be a desired method of controlling EBP (if that is possible)...just thought it was an interesting question. [/QUOTE]
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Max EBP before needing a wastegate
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