I'm planning on buying a boat this spring. I am intersted in 28 Panteras and AT's, or maybe a nice Cig Bullet. As this will be my first boat I've owned, and obviously first perfomance boat, I can't get reasonable insurance then on as much power as I'd like to get
I have found a Bullet I like, but it has blown 454's. It has the 250 blowers, and was built to run blown. I'd estimate the HP at 600 or so. They are set up with twin 4 barrels.
So, my basic question is could I run them without the blowers for a while, or put on a bigger pulley to get the HP below 500?
I'm just trying to get a feel for what the options would be other than lie about the power, which I wouldn't want to do of course.
Thread: 454 Built for Blower W/O Blower
Results 1 to 20 of 26
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01-23-2009 09:05 PM
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01-23-2009 09:26 PM
If it is your first boat I would suggest picking one with out blowers. Pick you that will go about seventy with stock power.
If you lie for your insurance it will be useless at claim time.
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01-23-2009 09:32 PM
Lie about the power...
Depending on what it's got for heads, you can do a cam swap and still make some decent power with 8.5:1 compression. I built a blown 454 for a buddy who ran out of money and didn't end up buying the blower. It still made 510hp and 530trq. Depending on deck height, gasket thickness, etc, you might be able to find a bit more comp as well.
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01-24-2009 02:22 PM
Thanks. I'm not too concerned with making the most power for the first season. I would like to be able to just leave the blowers off for a summer or two then use them once I've gained experience enough for insurance to still be reasonable.
I'm just wondering if with the lower compression setup for blowers would they run reliably without them?
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01-24-2009 02:38 PM
There's no problem running without them.
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01-24-2009 03:16 PM
There is certainly no problem running without the blowers. Nor will you do any damage. It just will not make as much power as it would if it had a little more compression. It all depends on what the comp. ratio is as to how much power it will make.
Eddie
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01-24-2009 07:00 PM
Thanks guys, that is what I was hoping to hear.
I know I can get reasonable insurance with 425 a side (which won't push a bullet too fast ), and think that'd be a safe estimate for these without blowers, so I wouldn't be "lying" to insurance.
I just figure with them "built" for blowers, they will make less power without them, but be "overbuilt" for running that way and be able to use lower octane, right?
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01-26-2009 09:51 AM
I owned a "blown" Bullet...Leave them on. You will love it !1
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01-29-2009 09:56 PM
The carbs are gonna be too big without the blowers and they are probably already tuned for the blower application. They are probably 950-1050cfm carbs.
The Hardin Marine intake/carb kits are $700 each plus shipping. If you can find a used set of props, you might get by just over 2k.
http://www.cpperformance.com/SearchR...anufacturer=47
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02-04-2009 11:30 AM
Is that the one in Old Saybrook, CT? I was ready to go up there and look at it. It seemed like a very good price until I found out it didn't have a trailer...
(sitting on one in the ad pictures, nothing said about it not going with the boat)
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02-04-2009 12:18 PM
If the engines were built for the blowers and is not running more than 5-6lbs boost, I can almost garentee the carbs are not 1050's. They will be 750 to 850's probably. Although they will need to be rejetted, they can probably be reused for a N/A application.
But as others have already said, if the engines were done right, that is about the ideal engine combo for that boat with bravos. I wouldn't change them. I'd find another way with insurance. I hate to say it, but I only carry liability on mine for the same reason.
I have the EXACT same setup with the B&M 250 blowers running about 5lbs and am guessing I have just under 600hp (probably 575). The boat should run mid to upper 70's with that setup turning 27 or 28 pitch props.
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