Powerboat Forums at SpeedWake banner

502 EFI @ 475hp in Baja???

3.8K views 35 replies 12 participants last post by  loafy4420  
#1 ·
#2 ·
My initial thought that was that someone added headers and then claimed 475hp (415+60=475)
But it obviously doesn't have headers, and looks bone stock otherwise.
If the engine has been worked on (especially recently, considering the boat has 400 hrs) I would have to have documentation of some sort, and the name & # of who did the work in order to verify.
Hopefully they took better care of the boat/motor than they did the engine room.
 
#7 ·
[they did not offer the 500 efi in 1992.
if i member the hp500 was 490hp and the 500efi was in fact 500hp.]


the HP 500 carbed was 470 PSHP. The EFI version was 500.


[im guessing with a 502 you should be cracking 70]

I've known of 272s with 502s, and those boats won't break 70 stock. More like 67-68.
 
#9 ·
waterboy said:
[they did not offer the 500 efi in 1992.
if i member the hp500 was 490hp and the 500efi was in fact 500hp.]


the HP 500 carbed was 470 PSHP. The EFI version was 500.


[im guessing with a 502 you should be cracking 70]

I've known of 272s with 502s, and those boats won't break 70 stock. More like 67-68.
i have a 272 with 509 26 4 blade around 600hp best ive gone was 74gps
 
#11 ·
axkiker said:
to go back to your original question

I was running my 272 this weekend with myself and another guy. Light fuel and running with the current.

We got 58.3 max wot

I have a basic 454 330hp spinning a 23 mirage plus.

cruise speed at 3200-3500 is roughly 33- 35 mph

im guessing with a 502 you should be cracking 70
I assume thats the "Dream O Meter" that sounds at least 5 MPH too fast. Check that with a GPS and get back to us. When my boat was stock it ran 55 MPH on GPS with the same power and lighter boat.
 
#12 ·
#17 · (Edited)
jeffswav said:
I assume thats the "Dream O Meter" that sounds at least 5 MPH too fast. Check that with a GPS and get back to us. When my boat was stock it ran 55 MPH on GPS with the same power and lighter boat.

Nope thats straight off a Garmin GPS this past saturday.

I will say the 58+ was a peak however I never dropped below 57 when maxed out and trimmed properly. I would say I ran a consistant 57.5+