One of our rides is a 95 pulsare w/ 95 225 merc CLE, 10" set back on jack, large ear 26 chopper, 1 230LBS man with 1/4 tank, regular gear, cool day, on the edge @ 80.4 GPS.

2000 330zt, weekend package, full fuel tank (appx 140 gallons), 454 mag mpi x2, 23p 3blade mirage plus, 2 people. had a perfect rip of water, saw 71.8 on gps and ran out of water to a no wake zone. Mind you the think chine walks like hell...can turn the steering wheel and does basically nothing. Id like to chage from the internal to external over the winter.

I assume you're trimmed right up to the edge when chine-walking like that, right? Can you eliminate the chine-walk by trimming it down more? Obviously, this will kill some speed, but just wondering.

Here it is cruising @ 70 mph...

thats one more vote in my head to bolt the blower on
what kinda prop are you running? my Mirage+ wont lift the bow like that , i could probably get alot more mph if i could get out of the water like that

:food-smiley-007:
1974 Checkmate Runabout (17'6") w 250 straight six Alpha - 55mph gps w 21" cleaver

1989 Checkmate Maxxum 281, twin Bravos, newly rebuilt Gen V's, bored and stroked to 496, Holley, Gill, Crane 741's, Mirage 28's - - don't know yet, haven't got it in the water since I bought it last September. Next year.

borrowed bravo 1 30, slips funny around 2500-3000rpms, also ran a bravo 1 28, didnt slip as much, with about the same results...

I really have to try a bravo 1 then , when i trim out , just below the rooster tail , fastest speed i can get and i'm still spraying from the side at the driver position , i'm not getting e-nuff hull out of the water

1999 Checkmate 283 Convincor w/ twin 454 EFI Mags, Bravo 1's, 27P 3-blade Mirage Plus props.
72.2 GPS this weekend on Kaw Lake in OK at 4500 rpm on port tach. (I think my stock starboard tach might be wacky... showed 5200rpm. It was behaving erratically earlier in the day. Might be time for new gauges this off-season.)
80-85 degrees, 50% humidity
2 people in boat with gear and 5/8-3/4 tank of fuel.
Very mild wind chop on lake.

I kept trimming up till it started rocking. Didn't thrill the g/f any. :rolleyes: I need to make sure my drives are even... getting the hang of this and don't want to do anything stupid. Gonna keep learning. Would like to see 75 in two weeks at LOTO with 1/4 tank of fuel and just me in the boat. We'll see.

:ernaehrung004: Cool...pretty much the same as my '89. Do you have K=planes? Also, I'm interested in seeing the waterline when the boat is at rest, as I haven't had mine in the water, yet....busy building a garage for it this year while I get the engines ready.:musik010:

I have the Bennett tabs on my boat. Figured I'd run 'em until they gave me any issues and then possibly upgrade to those Victory's. I was told LOTO will bend Bennett's. No problem yet in one season, but I'm probably being pretty nice to them.

Do you have K-planes?

Here's a shot of the boat at rest at LOTO over Memorial Day Weekend:

Nice shot - not much water clearance to the pipes - do you run flappers? I picked up some Corsa mufflers which will stick out even further, so I think I'll haf to run flappers.

Yup - I have K-Planes that came with the boat, along with the Bravos - all untested by me yet - I can't post pics here anymore - you'll need to see http://forums.boatfreaks.org//vbgara...o=view&id=3610

Nice ride! Looks really clean. How much hp are you getting out of the motors now?

No flappers. I have the Corsa Quick-n-Quiet set-up and, FWIW, when I come off plane, I'll often switch the exhaust through the drives or I'll come off plane gradually to keep the water from rushing up into the pipes.

I'm having some fluid leak down the transom from my Bennett trim tabs. I need to look into that, too.

What is the weight of a 25 Checkmate Convincor?

Bought her without engines - building them in my spare time this year, so we should keep in touch...
PayCheck.

Definitely. Keep me posted on your progress. :ernaehrung004:

My Boat is a 259 Convincor
-468 cid 8:1 compr
-FAST engine management with 60 lb/hr injectors
-Whipple making 3psi
-Mild hydraulic roller 224/236 @ .050 .594/.600 lift
-CMI sport tube lites
-Stainless valves in stock Mag heads with the bowls blended
-MSD distributor and 6AL
-Aermotive fuel pump and regulator with -8 supply
-Bravo 1 with Bravo 4 blade 28p reworked to a 27p

With just me on board and a full tank of fuel I get 75 MPH out of it on the GPS and it is turning 4900. I am gonna try a 26P 4 blade to try to get a lil closer to 80 mph with some more tuning.

How much does a 259 convincor weigh?
What's your hp?

[QUOTE=socalstone;2701149]How much does a 259 convincor weigh?

Around 4250lbs with a BBC and Bravo drive or so I am told.

I believe about 4250 is right, I dont know how much power it makes, somewhere around 550 I would think????

I have the weight for 96 models. Don't forget Checkmate did not include the swim platform as footage on pre 1999 models not 100% sure if 99 models are or aren't included

283 -5300
253-4400
242-3900
220-3300

I have a 94 253,4400 lbs with a weekend cabin, I removed the swim platform(110 lbs) added swim steps, 06 B-1. -2 imco shorty, merc labbed 26P, imco steering, 24" trim tabs,. 540 bbc with full msd, cmi, 741 cam, aluminum heads, 1.8 rockers. HP 1000 Holly with 2" super sucker, engine was a HP 500. I turn the 26P at 5200 seeing only 74 on speedo, i did check the speedo with a gps was within a 1 mph. I do run imco mufflers. See some pictures are in the checkmate offshore only colum. Best speed i have seen is 76 aired out. I had the bottom acid washed and checked for a hook and no increased in speed. Glen syracuse ny

I know of a 06 300 that has 620hp with 4 people and 80 gallons of fuel running a 26p bravo1 and at 5400 rpms it runs 84 mph on GPS, to me it sounds like you have a bad slippage rate.

And the BS flag is going up the mast.....

419/529-4446 Here is his numeber call him monday and lets see who is full of BS you or this 45 year veteran that has been running Checkmates since you where in diapers big boy :cool-smiley-027:

Not trying to start a pizzing contest here, but is this boat red with 2 OUTBOARD's??

OldNavy- I think he is talking about the factory 30' OB.

:rolleyes: Hmmmmmm....

I'll take your word for it. Impressive.

I'd sure like to find out what you have done to that 225 to reach those speeds. Is your motor a 3.0 liter or a 2.5 liter motor?? I'm running the same boat...1994 Checkmate Pulsare 2100 long deck with 1995 3.0 liter Merc 225 Xri turning a Trophy Plus 26. With two adults, half a tank of gas, full gear and cooler, 7.5 " setback I'm running 73-74 mph. I'd love to hit 80 mph with a stock motor!!!

Last run of the year: 73.1gps.

1999 28' Convincor
Twin stock 454 EFI Mags
Bravo 1's
27P Mirage Plus 3-blades
5100rpm

Rockin' back and forth. Gotta figure out how to settle it down w/o scrubbin' speed. I'm learning. Suggestions welcome! Not sure if I'm just trying to trim it up too much or my drives aren't at identical trim or ?????

Okay the boat is Kunkles purple boat 620 hp and 650 on torque spinning a 26 bravo. I belive the speed really was 83. something but it was close to 84. "GPS" But he also said the engine was not broke in yet so he did not really hammer on it. So their for with a bit more time on break in and some tweaking it could do better. This is a fact and not here say and I feel they know Checkmates pretty good because they have had them since the sixties.

Maybe it all comes down to the driver or do we really have the HP we think we have or are we trimming the crap out of it when its not needed.

I am no pro by no means on boat driving but if it came out of Kunkles moulth you can take that to the bank.

PS
the engine has no kind of forced air, nos, or any type of huffer in no way shape or form. pump gas all day long

Okay the boat is Kunkles purple boat 620 hp and 650 on torque spinning a 26 bravo. I belive the speed really was 83. something but it was close to 84. "GPS" But he also said the engine was not broke in yet so he did not really hammer on it. So their for with a bit more time on break in and some tweaking it could do better. This is a fact and not here say and I feel they know Checkmates pretty good because they have had them since the sixties.

Maybe it all comes down to the driver or do we really have the HP we think we have or are we trimming the crap out of it when its not needed.

I am no pro by no means on boat driving but if it came out of Kunkles moulth you can take that to the bank.

PS
the engine has no kind of forced air, nos, or any type of huffer in no way shape or form. pump gas all day long

Sinking Ship, is sounds like we could all learn somethng from your friend and his Checkmate. 5400 RPM, 1.5 drive ratio W/ 26" pitch prop at 83 MPH gives 6.3% propeller slip. I have a 283 W/ twin 502 MPI's running 80 MPH (GPS) at 4800 RPM W/ 29" labbed Mirage Plus props (9% propeller slip). Does he have any updates to help improve prop efficiency (i.e. ext box, shorty drive, nose cone...)? 6.3% prop slip is an amazing number.
Thanks.

Are you running 3-blades? I'm spinning 5100-5200rpm WOT w/ 27P Mirage Plus 3-blades and twin 454 EFI Mags. Thinking I might need to try 29's like yours.

I would give them a call their 2004 300 Convicor has been radared at 107. They have been dealing with Checkmates since early sixites I have seen the purple flammed boat and their is no nose cone on the drive. I feel the bravo 4 blades props are the best on a Convincor.

http://www.kunkelsmarine.com/newboats.html

Keytime, yes the Mirage Plus props are 3 blades. I believe your boat was the actual boat used in a Hot Boat article and they reported 81 MPH with 31" props (I don't have the article, this is just from memory). I thought the rev limit was set @ 5150 RPM on the MPI engines so more prop may help.
Purple, looking at the pictures on the link you posted, the 2004 boat has an IMCO lower which could be a -2?? Also, the hull has a notch all the way across the transom. I have never noticed this on a Checkmate before, are newer boats built this way (or was that boat modified or a special build)? As far as the 4 blade prop theory, I have a set of Bravo One labbed 30" props I will be testing next year when the boat's updates are complete (Stellings boxes, IMCO steering, engine upgrades to @ 500HP, Mechanical Indicators) and I hope they work with the new set up...

The notch is factory on the 2004 blue flammed 300 Convincor that was radared at 107 mph and yes that boat was running a imco.

But also the 2006 300 purple flammed Convincor that runs 84 has the same factory notch running a factory bravo drive with a factory bravo 1 26p prop. I have seen in person both boats and both boats are still at Kunkles.

Both boats have never been altered in any way shape or form on the hull. Both boats have the orginal gel-coat that came from the factory.

The 30 footer is the 300 now.

What is this "notch"? Is it a step?

Is this the 107mph boat?
http://www.kunkelsmarine.com/newboats2.html

Ok. Essentially a notched transom. My apologies. I don't wake up till about noon on Wednesday. :rolleyes: