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Can anybody tell me if theres any difference between an unleaaded and leaded efi 250? I've heard the compression and stroke may be different, is this true?
Coz im running an unleaded head on a leaded engine you see.
I was also wondering if i should be using an unleaded computer module instead of the leaded one in it. Is there any difference?
And what about injectors, any difference? And can i fit better injectors from a later model ford?
any info would be great guys, thanx in advance
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I think the Unleaded engines may have a dished piston to lower the CR
A couple of Unleaded EFI engines I have here have the Knock Sensor on the front head bolt - computer detects pinging and winds the timing back according to the manual - if your EFI s
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Thanks alot man, I'll definately check that out.
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yeah the unleaded have dished pistons and have a different chamber,which is fine in a stock engine but not as good as the eairly head when you work them.motor should be fine
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