500EFI question
#1
500EFI question
I’ve found many older threads asking similar questions about this but no definitive answers...
i have 1999 500EFIs still sealed (300 hrs.) next winter plan on freshening heads and new roller lifters... I know the
intake and TB are the limiting factors on these motors but would I gain any noticeable power going with better flowing heads ? or changing to 525 cam? Or wast of money for 20-30 hp.
I’m running 95-97 now but would be nice to be 101 🤔
Thanks.
i have 1999 500EFIs still sealed (300 hrs.) next winter plan on freshening heads and new roller lifters... I know the
intake and TB are the limiting factors on these motors but would I gain any noticeable power going with better flowing heads ? or changing to 525 cam? Or wast of money for 20-30 hp.
I’m running 95-97 now but would be nice to be 101 🤔
Thanks.
#2
Registered
iTrader: (3)
I’ve found many older threads asking similar questions about this but no definitive answers...
i have 1999 500EFIs still sealed (300 hrs.) next winter plan on freshening heads and new roller lifters... I know the
intake and TB are the limiting factors on these motors but would I gain any noticeable power going with better flowing heads ? or changing to 525 cam? Or wast of money for 20-30 hp.
I’m running 95-97 now but would be nice to be 101 🤔
Thanks.
i have 1999 500EFIs still sealed (300 hrs.) next winter plan on freshening heads and new roller lifters... I know the
intake and TB are the limiting factors on these motors but would I gain any noticeable power going with better flowing heads ? or changing to 525 cam? Or wast of money for 20-30 hp.
I’m running 95-97 now but would be nice to be 101 🤔
Thanks.
#4
Thanks Cigrocket, great advice...but I didn't want to get crazy with the HP , just wanted Xtra 75hp or so to get me 3-4 mph since I'm doing heads anyways...I have a 1080HP procharged 540 from my last boat and second m-3 kit and bowtie block with SCXs waiting in the wings... but not wanting to put bigger power in this boat right now, I like the reliability of the EFIs for now.
Last edited by lucky cat; 06-19-2019 at 06:14 AM.
#5
Platinum Member
Platinum Member
iTrader: (6)
Id leave it alone, some after market heads have raised exhaust ports which can cause alignment issues with your pipes going through the transom.