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Props, Setups & Rigging This is our Checkmate setup forum. Topics include props, jackplates and setback, trim tabs, steering etc. This is also the forum to share your best setup tips and top speed numbers. So come on in and exchange setup details with your fellow members.

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Old 09-18-2006, 08:48 PM   #1
bigsbetter
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Model Owned: 251 Convincor & Chaparral Laser 32 W/Twin 454's

Default HOW FAST IS YOUR CHECKMATE? EVERYONE!

I'm sure a thread like this has been done before, but most of us are always doing something to improve our performance, so it's time to update. I would like to see members post there personal boat specs. ,and current top speed numbers. What you have done to your engine, horsepower numbers, prop specs, and any other mechanical or speed/power details you would like to add. I'll start it off...




1988 251 Convincor Stock 454 with Wieand 177 supercharger running 4.5 lbs. boost. Timing is set at 28 degrees total. Holley 800 cfm carb. Stock everything else. If the blower is adding 125-150 horsepower as it's sopposed to then I'm around 450-475HP. Best speed numbers are 69.7 down river on GPS. I'm running a 26 Bravo 1 prop @ 4500 rpm. It runs about 3 mph slower with my 28 Hydromotive @ 4250rpm. Still expiermenting with props... and waiting for the cooler weather to get it over 70mph. The supercharger has gained me 12-13 mph. at a cost of $1900.00.


I'm looking forward to seeing other members specs. and how much work and expense it took to get there.
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Old 09-18-2006, 10:21 PM   #2
vinny p.
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Model Owned: '99 25 Convincor 725 H.P.

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My 259 will run 84 on a good day with good conditions, right chop, cooler air, less weight on board. It will run 80 any day. All work has been rigged and / or done myself. As for power, I built an N.A. 540. Relatively mild, low compression, hydraulic roller cam, A.F.R. heads, all good parts.. Made 680 h.p. @ 5800 rpm and 660 ft lbs of torque @ 4900 rpm. CMI full dry headers, GGB extreme mufflers. Thats is in front of an Merc XR upper and Imco SC lower ( standard length ) , spinning a labbed 25 P5-X Hydromotive. Imco dual ram full hydraulic steering, Dana Marine HP-1000 tabs.
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Old 09-18-2006, 10:21 PM   #3
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Model Owned: 251 Convincor & Chaparral Laser 32 W/Twin 454's

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If your boat/engine is stock we'd like to haer about it also.
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Old 09-18-2006, 11:00 PM   #4
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Model Owned: 1986 Diplomat I/O

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Little Diplomat I/O (17 ft) 5.7v8 forged flat tops, good 3 angle on the heads, Too much cam(was in block, I wish I knew the spec's) Edelbrock performer intake w/ Holley 650 doublepumper with powervalves plugged off. turning a 14.5x20p Mach Sterndriver 4 blade to 5300 rpm w/ alpha outdrve.
Looking for a cheap gps to check speed. I think it has a lot more in it, but we had a hydrofoil on the outdrive that I want to take off, and I think it will need trim tabs to offset the weight in the back of the boat.
Big change from the 4 cyl that came in the boat!!!!
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Old 09-18-2006, 11:15 PM   #5
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Model Owned: 2000 Persuader 218br and 1982 Diplomat w/ Mercruiser 470

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82 Diplomat with Mercruiser 470 and standard aluminium prop. GPS at 48mph.
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Old 09-18-2006, 11:32 PM   #6
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Come on jkeiper, lets hear your secret.

Mine, 1994 pulse 185,
175 efi mag mariner
23 laser II
5 1/2 in. jack plate
70 mph (speedo), with 1 person in boat almost no fuel, center windshield in and bow cover on.
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Old 09-19-2006, 09:52 AM   #7
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Model Owned: 2001 300 Convincor, 2005 Fountain 35 EX

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2001 300 Convincor (no notch), Mercury 525SC, Lightning headers, Teague 4.5" select tips, full helm hydraulic steering, K-tabs, HP gimbal, Bravo 1, Big oil cooler, tweaked 1050 dominator carb (stock with motor), 5 lbs boost (stock), 69.7 GPS 2 people 1/2 tank fuel 25P Hydromotive QIV, 70.5 GPS same load 4900rpm 26P Bravo 1, 72.3 GPS same load 28P labbed bravo 1. Need to get my 26 labbed to reach 5200rpm. If I don't sell the boat I will add a Super Chiller, bigger cam, roller lifters etc. hoping for 600 + hp and high 70's. I will post after the winter with results.
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Old 09-19-2006, 10:15 AM   #8
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Model Owned: '78 Predictor, '88 Starflite, '98 Convincor 220 (current)

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well im sure most of you know this already but here ya go agian

78 predictor
86 merc 2.4 200 (stock)
5.5" setback at 1" below the pad
28P merc chopper
turning 6300-6400 running at 78 mph gps
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Old 09-19-2006, 06:04 PM   #9
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Hey guy's, 2000br with 1996 merc 225efi, 10" manual jack plate and 2" spacers jacked all the way, and a 27" trophy plus. 76mph on gps @5600rpm's and still tweaking!
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Old 09-19-2006, 06:23 PM   #10
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1996 21 Pulsare BR 225 EFI stock 12" set back hydrolic plate about 2" below pad 26 trophy plus medium vent plugs 70.5 GPS. Still working it out I know theres more there I just have to find it.
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