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-   -   max boost on 502 mag efi?? (https://www.offshoreonly.com/forums/general-racing-discussion/291564-max-boost-502-mag-efi.html)

Josh LaFountain 02-16-2013 06:59 PM


Originally Posted by JerrodGlover (Post 3868480)
What type of gains are being seen with the safe 5 psi?

Was running 67 stock. Hit 76 last summer on 5 lbs after testing a million props and finding the best one. The engine will have 500 hrs on it mid summer so it will need pulled an freshened. Was going to do a 540 build but a friend told me i should just keep it a 502 amd utilize the blower i payed 7 grand for to its potential instead. I just need.to find a safe economical way to do so.

pqjack 02-18-2013 06:56 PM

roughly 50 to 60 hp going from 5 to 7 pounds...with the proper tune,the 502 should take it... IMO,a better way to do it would be to do a cam change while rebuilding it

Josh LaFountain 02-19-2013 11:17 PM


Originally Posted by pqjack (Post 3870228)
roughly 50 to 60 hp going from 5 to 7 pounds...with the proper tune,the 502 should take it... IMO,a better way to do it would be to do a cam change while rebuilding it

I kicked that idea around also. I figured dropping $400 on a custom ground cam would be a good investment. Would def go with a nice set of roller rockers also to free up a lil friction.


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