78,8 MPH in a 419 SR1 with Merc 496
 

last week i finished prop testing on my 1991 Formula 419 SR1

Setup:
Triple Mercruiser 496 HO (from 2002)
RAYLAR Kit BCK 103 (525 HP)
Bravo 1 XR Drives 1:1,50 with Imco extension Boxes and external steering
Lab finished Bravo 1 30 pitch Props
Thru Hull exhaust with livorsi switchable silencers

Test in sweatwater showed 70 MPH (GPS) with stock engines at 5000 RPM wit 26 `bravo 1 lab finished (salt water 73 MPH at 5150 RPM)
after installation of the Raylar Kit first test with
28 `Bravo 1 lab finished showed 77 MPH at 5150 RPM (hitting rev limiter)
Got some 30 `Bravo 1 lab finished props - new test in sweatwater: 78,8 MPH (GPS) at 5000 RPM with 220 gal of fuel onboard and anti - fauling paint !
I am very optimistic to see 80 MPH in saltwater next year
Engines have extrem torque - I am able to plane the boat without tabs on any 2 of 3 engines with the big 30 `props

Also the boat weight lost 300 pounds thru the new RAYLAR heads.
more about the BCK 103 kit you find here
www.raylarengine.com

Re: 78,8 MPH in a 419 SR1 with Merc 496
 

Awesome results 8 mph!!

Re: 78,8 MPH in a 419 SR1 with Merc 496
 

Congrats :drink:

Re: 78,8 MPH in a 419 SR1 with Merc 496
 

Nice!!! How tough is it to find marine mechanics to work on high performance Chevy motors over there?

Re: 78,8 MPH in a 419 SR1 with Merc 496
 

If You know 1 you are a rich man

Re: 78,8 MPH in a 419 SR1 with Merc 496
 

Nice job!

You must know a high performance Chevy mechanic if you can afford to feed 3 big blocks German priced gas.. :D :D

Re: 78,8 MPH in a 419 SR1 with Merc 496
 

Wow, that's a lot of glass to be moving that fast. You gotta be happy.

Re: 78,8 MPH in a 419 SR1 with Merc 496
 

1,49 € / Liter = 7 US $ / gal

Re: 78,8 MPH in a 419 SR1 with Merc 496
 

You'll see 80 no problem...there is a guy up at the Marina with a 93 419 3/525SC's and he sees 80 all day.
Good luck, looks great.