A few Questions
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A few Questions
So im going to rebuild (upgrade) my 454 / 330hp and am looking to get around 400+. Id like to spin it around 5200. My boat is a heavy (5850) and I run a bravo 3 (2.0:1) and 28p props. Im shooting for 60 mph (runs 44 now with 26p and 4400 max rpm). Ill be installing 454-502 Mag heads, 454-502 Mag intake & EMI exhaust.
Whats the max compression ratio Id want to stay at to run pump gas ? 91 ROM
Will the stock crank handle the compression and RPM's ?
Will the stock rods handle the compression and RPM's ?
Will OEM pistons allow me the compression I need to reach my power goals. (thinking +.030")
Piston Pin type. pro/cons over pressed or full floating.
What type of cam/followers ? Hydraulic or flat (pros and cons)
What cam specs should I stay near to achieve my goal (min / max lift, duration, overlap, etc.). I want something with a fairly smooth idle and a wide power band (i pull kids on tubes most of the summer and do some slower cruising).
What benefit is there to running a smaller cam, but a larger rocker ratio ?
What effect will roller cam, rockers and lifters have on power output ? (how much is a typical gain....bang for the buck)
Double row chain vs. belt timing drive vs. gear drive ?? pros / cons
Im trying to figure where the best $$$ spent is going to yield the highest results and still maintain longevity. If you know of a basic build parameters that have worked for you and would share them, please do. Im not against a stroker crank either, but would need to know rod length and any special piston configurations. Im not going to assemble/tune this myself, but the better informed I am at deciding which way I would want to go, the better off Ill be when deciding.
Thanks in advance for taking the time of read and reply here.
Whats the max compression ratio Id want to stay at to run pump gas ? 91 ROM
Will the stock crank handle the compression and RPM's ?
Will the stock rods handle the compression and RPM's ?
Will OEM pistons allow me the compression I need to reach my power goals. (thinking +.030")
Piston Pin type. pro/cons over pressed or full floating.
What type of cam/followers ? Hydraulic or flat (pros and cons)
What cam specs should I stay near to achieve my goal (min / max lift, duration, overlap, etc.). I want something with a fairly smooth idle and a wide power band (i pull kids on tubes most of the summer and do some slower cruising).
What benefit is there to running a smaller cam, but a larger rocker ratio ?
What effect will roller cam, rockers and lifters have on power output ? (how much is a typical gain....bang for the buck)
Double row chain vs. belt timing drive vs. gear drive ?? pros / cons
Im trying to figure where the best $$$ spent is going to yield the highest results and still maintain longevity. If you know of a basic build parameters that have worked for you and would share them, please do. Im not against a stroker crank either, but would need to know rod length and any special piston configurations. Im not going to assemble/tune this myself, but the better informed I am at deciding which way I would want to go, the better off Ill be when deciding.
Thanks in advance for taking the time of read and reply here.
Last edited by oregondunes; 01-10-2013 at 06:25 PM.
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fixx
your best bang for a buck would be a 496 stroker kit..it will be the best money you ever spend..for about a 1200.00 you can get crank rods and pistons rings bearings..you will just have to prep the block and clearance it for the extra 1/4'' arm but will be well worth it..spend a extra 500.00 and get a forged crank..also pic the 6.385 rods..you will need to have the flywheel zero ballanced and have the counter weight milled off if you decide to go forged.if you have a 2000 block then you will already have a roller cam..as long as you dont go over .575 lift you can save some money and use the stock roller lifters with the cam upgrade..
#8
Whats the max compression ratio Id want to stay at to run pump gas ? 91 ROM
Will the stock rods handle the compression and RPM's ?
With the Bravo 3 you are limited by prop selection and 5200 rpm and 60 mph is about the max you will see with the 28" props. I'm not sure the Bravo 3 can handle the HP required to get your boat to 60 mph.
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9 to 9.5:1 with iron heads. Maybe more with aluminum heads. I'd target 9.0 for starters.
This is a moot point since 400+ HP will not get you to 60 mph. As stated by others, you need at least 600 hp with that boat.
With the Bravo 3 you are limited by prop selection and 5200 rpm and 60 mph is about the max you will see with the 28" props. I'm not sure the Bravo 3 can handle the HP required to get your boat to 60 mph.
This is a moot point since 400+ HP will not get you to 60 mph. As stated by others, you need at least 600 hp with that boat.
With the Bravo 3 you are limited by prop selection and 5200 rpm and 60 mph is about the max you will see with the 28" props. I'm not sure the Bravo 3 can handle the HP required to get your boat to 60 mph.
It's a target.