Difference between 500efi and 575Sci
#1
Registered User
Thread Starter
Join Date: Feb 2001
Location: Tampa, Indian Shores Beach
Posts: 3,300
Likes: 0
Received 1 Like
on
1 Post
Difference between 500efi and 575Sci
Looking to learn some here, What is the difference between these two besides the 256cid Holley/ weiland, and compression ratio?
Are their differnt internals, heads, cam, springs,??
Thanks
Are their differnt internals, heads, cam, springs,??
Thanks
#2
Registered
Join Date: Oct 2000
Location: On the river
Posts: 3,372
Likes: 0
Received 0 Likes
on
0 Posts
here are the specs for the 500 EFI
http://www.mercurymarine.com/hp500_efi_-_470_hp
and the 575
http://www.mercurymarine.com/hp575_sci_-_550_hp
This might help alittle
Travis
http://www.mercurymarine.com/hp500_efi_-_470_hp
and the 575
http://www.mercurymarine.com/hp575_sci_-_550_hp
This might help alittle
Travis
#3
Registered User
Thread Starter
Join Date: Feb 2001
Location: Tampa, Indian Shores Beach
Posts: 3,300
Likes: 0
Received 1 Like
on
1 Post
Traviss,
I went through the specs and only diff it lists is as follows
575= TBI, comp 7.50:1 and weiand 256, 92 oct required
500= MPI, comp 8.75:1 87 oct required
I am really curious is the blower the only differance?? their has to be more to justify the cost??
I went through the specs and only diff it lists is as follows
575= TBI, comp 7.50:1 and weiand 256, 92 oct required
500= MPI, comp 8.75:1 87 oct required
I am really curious is the blower the only differance?? their has to be more to justify the cost??
#4
VIP Member
VIP Member
Boating magazine had an
article on building the 575,
i will try to find it when i get home
tonite, but some of the differences
I do recall were: 575 flat tappet
hyd. cam, the already mentioned
compression difference, and shorter
connecting rods ???
With mercury marine horsepower
is exponential with $$$$
jt
article on building the 575,
i will try to find it when i get home
tonite, but some of the differences
I do recall were: 575 flat tappet
hyd. cam, the already mentioned
compression difference, and shorter
connecting rods ???
With mercury marine horsepower
is exponential with $$$$
jt
#6
Registered
The 575 is a hand built blueprinted motor while the 500EFI bottom end comes preassembled from GM powertrain like the rest of the black Merc motors. Im sure they justify some of the cost from this fact. Still pricey though.
Ron
Ron