still smoking

The rockers will not be a problem with the computer but you won't see much hp gain, IMO.

My own build of a 525SC w/ edlebrock heads and more compression than a Merc. Running a roller cam and rockers with a 950 Pro systems carb and cmi headers. Running a 26 Bravo one, 74 GPS when things are perfect. Can hit 72 all the time. When I bought it it had a 23 M+ and approx 400-450 hp and ran 65.

Mike S.

iTrader: (2)

Thanks for the response! The rockers are just setting on the shelf so thats why I ask, and a easy change! It also has emi thunder exhaust with risers

Q. Has yours always been a carb or did you change it? Just woundering the benefits of changing to carb I have a supper Vic. Intake with 1050 dominator! But not sure on the longevity of it! And resale!

I've been doing a check list on everything and come to find out when the last owner did the freshin up (I bought it with a fresh motor and he just said he rebuilt it!) they bored it and a master rebuild kit in the motor! So it's a 509 ci which is good to me! What other upgrades with out pulling the motor and still good for later resale?

Mike S.

iTrader: (2)

Forgot to add I also have a msd set up! Box, dist., etc!

still smoking

If you have long risers on the EMI manifolds get a 731 or 741 Crane style roller cam and your big block will wake up a bit. You can also contact RM Builder on here and see what he recommends for a cam. If you plan to keep it a while and know how to tune a carb put a good single plane intake under the dominator when you upgrade the cam. Just my .02 worth. I do think for the average boater the fuel injection has better resale though.

Mine originally came with a 502, when I bought it, it had an HP450 style built 454. I ran it for a season and pulled it, I redid it last winter bored to a 468 with 8.75 compression. Put on better heads and the little blower. I kept the Crane cam that was in the engine it's similar a 500EFI cam but has the firing order swap. Idles great and starts real quick, I am really happy with the way it turned out. Last year I ran it with 5 PSI of boost, I have a smaller pulley I might try this year.

Mike S.

iTrader: (2)

Sweat sounds like you got yours where you want it! Gotta lov'em when there the way you like it!

Yeah I've drag raced my whole life I'm preaty good with a carb but don't know squat about fuel inj. So I'm in lost territory! I also have tons of parts lying around I have a Crain r274 7/4 cam swap lying around think its about 710 not sure if it will work! All in all I just didn't want to go to radical! It is also used as a family boat so want it reliable! But all it can be! Lmao!

supermx96

I have a 525sc gen 6 upgrade motor in that boat with edelbrock alum head, roller camshaft custum grind by Bob Madara b&m 250 blower at 10 psi boost with water methanol injection and i did 80 mph in good condition 78mph all the time
with bravo 1 prop 26 lab at 5700-5800 rpm.

That boat love 4 blade prop especialy with single engine version. This summer i want to try a rev 4 prop, i hope that prop can help a litle on top speed.

Mike S.

iTrader: (2)

Man that's rolling in these boats cool deal! Yeah I've been looking for a 4 blade just haven't found one to try yet everyone is useing them lol! I quess I'm gonna have to brake down and buy one lol!

still smoking

The rev 4 might work better than the bravo because the rev 4 is supposed to give more bow lift. These boats need bow lift to run, the bravo works way better than the mirage plus.

Mike S.

iTrader: (2)

Does the 4 blades work the same as the 3 blades as far as if I want to run 5000-5100 I need a 21 three blade to turn that but if I want a 4 blade and turn 5000 what will I need 21-22??

As long as I can turn at least 48-4900 I think ill be good! Just don't want to loose a lot on the big end!

supermx96

If your prop is Mirage Plus the Rev 4 prop 21p should be turn almost the same rpm. If you look to a Bravo 1 prop you will need to get a 20p to turn at same rpm but the smallest pitch for Bravo 1 prop is 22p.

The Mirage Plus vs Mirage prop lower your rpm about 200-300rpm.