just bought 1998 a/o 2600 with 454 mpi procharger

[Ran-Dom 32]

Originally Posted by razor1115

Ran-dom,

How's the new project coming along?

Zack

I made it into a way bigger project then my original intentions, but it should be pretty sweet when i'm done, It's currently at Mitcher T getting a face lift

[razor1115]

Originally Posted by Ran-Dom 32

I made it into a way bigger project then my original intentions, but it should be pretty sweet when i'm done, It's currently at Mitcher T getting a face lift

Outstanding - Can't wait to see it!

[stevemamanfountain]

decided to keep it and use it for the summer...anyone have any idea what prop is best for my setup ? 454 procharger factory setup with bravo 1.... i got the boat but the prop was misplaced..

[quest]

what is the gear ratio of the outdrive. most of the 454 boats powered with the procharger ran about 90 mph. Iis the engine a 454 magnum with square ports or the 7.4 with oval peanut ports. the magnums could take more boost and could last longer than the 7.4s because they have forged pistons , bigger cam and better breathing heads.

[stevemamanfountain]

Originally Posted by quest

what is the gear ratio of the outdrive. most of the 454 boats powered with the procharger ran about 90 mph. Iis the engine a 454 magnum with square ports or the 7.4 with oval peanut ports. the magnums could take more boost and could last longer than the 7.4s because they have forged pistons , bigger cam and better breathing heads.

here are some pics.. please tell me what you think it is...

[stevemamanfountain]

some more pics

[stevemamanfountain]

there are only 105 hours on the boat...arizona it's whole life..never seen salt water...so i think i should be fine...i will run it stock....no more mods...
what prop do i need to put on there ?

i do have a brand new set of hydromotive intimidator q4's ..... they are 26 pitch or 28 by 15 or 15.5 if i remember....

can i use these...?

[stevemamanfountain]

http://www.offshoreonly.com/forums/s...=1#post2458012

here are some pics .... it would be great if i can use those props.. they are brand new and i think they are 28 not too sure.. cant tell if they are labbed ? i know they were 15.5 or something...

[stevemamanfountain]

the props i have are 28 x 15.5 .... hydro 4's never labbed..

can i use them on this boat ?

[quest]

You have the 7.4 MPI motor which has the cast pistons and should be set up more conservatively than the 454 magnumfor good life. My best guess is that you can expect to get approximately 80 mph with this engine. If you have a 1.36 gear ratio the 28 pitch hydromotive should work just fine. if you have the 1.5 gear ratio you will need a 30 pitch bravo one prop. the gear ratio is marked on the sides of the outdrive.

At any rate I would put the 28 hydromotive on it to start and see what MPH and RPM ypu get. I don't know if the computer has been modified to let the engine rev to 5000 RPM or it is still limited to 4600 rpm. if you get up to 4600 rpm easily and hit the rev limiter then you know you need the 30 pitch bravo one or you can get the hydromotive re pitched to 29.