How fast is your Magnum 27

[Staffan Berg]

It would be fun to get information how fast YOUR Magnum is.

Let us know your power-setup ,prop and speed.

My Magnum 27 Sport (hull 178) is:
Single 496 HO 425 HP 63MPH with Mirage 23" (55 knots)


(Anyone having twin Mercury 377: Curious about the performace with that power setup)

Please:
join the facebook group "Magnum 27 Sport"

[superhatz]

Twin 320 EFI Mercs, Bravo 1s with 21p Mirage Plus...and old bottom paint.

67 GPS....should see 70 without the bottom paint?

[smidgen too]

I have posted this before but here are the speeds of many Mags from back in the day.

[Morgan's Cloud]

That list is interesting to say the least .

Is it just me , or was everyone else expecting much higher numbers too ?

[Sweet Cheekz]

I beleive smidgens list is average speed

Parnell

[smidgen too]

I beleive smidgens list is average speed

Parnell

This was a APBA timed event, thats all they did back in 1976. A factory stock P class Volvo 300hp Mag 55 to 57mph. A Trs 280 Mag stock 61 to 65mph. I bought the Showdown Mag and 65mph thats all it would do with the stock 280hp engines. I later modified it to the new 1980 APBA specs & she ran 71mph, but had I raised the drives into the rub rail 75mph could have been reached. But it was 1980 and we were still learning what worked.

[Staffan Berg]

What is the speed with:

Single 496 HO = 63 mph
Single Mercury Racing 525 EFI = ?
Single Mercury Racing 600 SCI = ?
Twin Mercury 377 (320 hp each) = ?


Please fill in missing values (What do you think and why)

All info is interesting.

I am in need for more speed.

[superhatz]

Mine is 320 each...

How about a single Merc Racing 1350!!....

[Staffan Berg]

Mine is 320 each...
How about a single Merc Racing 1350!!....

Needs to much petrol = expensive LOL
Yes - In my dreams !
Have to wait until the "stock market" has gone up 10 times from
todays value ?

[Morgan's Cloud]

Me = The perpetual boat speed skeptic ..

Staffan .. Is your 496 stock ? ?

'Cause my 25 Mag with a 502 mag (admittedly a B3) might touch 60 on a good day ,, but I'd only expect maybe 63 if I switched out to a B1.

These are heavy, hard to push hulls and if your doing 63 with a stock 496 you must have done a few things very right !

[superhatz]

Me = The perpetual boat speed skeptic ..
Staffan .. Is your 496 stock ? ?
'Cause my 25 Mag with a 502 mag (admittedly a B3) might touch 60 on a good day ,, but I'd only expect maybe 63 if I switched out to a B1.
These are heavy, hard to push hulls and if your doing 63 with a stock 496 you must have done a few things very right !

I was going to say the same...63 is pretty good....

[Staffan Berg]

Me = The perpetual boat speed skeptic ..
Staffan .. Is your 496 stock ? ?
'Cause my 25 Mag with a 502 mag (admittedly a B3) might touch 60 on a good day ,, but I'd only expect maybe 63 if I switched out to a B1.
These are heavy, hard to push hulls and if your doing 63 with a stock 496 you must have done a few things very right !

Swedish water is fast - one cold summer evening.
Engine is remounted as high as possible (x-dimension)
Power trim was close to trailer position.

So 63 mph was top speed measured with Garmin GPS

but a normal day my top speed without extreme power trim I do 58

If you guys have any guess what a Magnum 27 Sport will do with a Mercury 600 SCI - I am glad to get your opinion.
Could save a lot of money for me !

Best regards
Stafffan