42mph to 46mph?

[jjsosnowski]

My buddy has a 86' 190 Prostar with a 351 Windsor. It runs about 41-42 mph. He has tried to make prop adjustments for top end speed. He would like to get the boat to 46 mph for barefooting. If we install a cam shaft, port polish, blah, blah blah, will that help for more hp and if so will the drive train withstand it? I would appreciate any input that I might be able to pass along to an MC brother. Thanks

[east tx skier]

JimN may also check to see if he has a clean flame arrestor.

[JimN]

Absolutely make sure the flame arrestor is clean. Also, make sure it has been properly tuned up, the carb is set up right, and it has good compression. No tuning will make up for low compression.


Talk to a speed shop. They should be able to get more power out of it. A cam will help, so will different rockers. And an intake manifold, and wax, wax, wax the hull(although I have heard that racing sailboats use a rough texture on the hull to cause micro-turbulence and the hull is then riding on a layer of bubbles). If you get the motor to put out more power and torque, you'll be able to use a more agressive prop, too.

[jjsosnowski]

thanks I will be talking to him at the boat show today.I will relay the info.

[BarefootWt]

I can't recall if the 86 has points for the ignition system (the 85 did). If so, upgrading to electronic ignition for about $99 will probably give you a couple more MPH at sea level (it did for my 85). Running 93 octane may also get you 1 MPH. You can always convert it to fuel injection also - a few hundred dollars later. I had checked into this but did not go there.

[Jim@BAWS]

41-42 Sounds like other problems.
That boat should top out at
45-46 with 1:1 transmission. 13 x 13 prop.
43-44 with a powerslot.

Change to breakerless ignition.
Change prop to 13 x 14 4 blade on a 1:1 Nibral
Change prop to 14 x 18 1/2 4 blade stainless

Oh yeah
I have all this in stock

Jim@ BAWS

www.bayareawatersports.com

(813) 996 2297

[MarkP]

"I have all this in stock"

Go get-em Jim.:toast: .

Hey Ive got to call you about something else.. Hope your home:wavey:

[lakes Rick]

I can't recall if the 86 has points for the ignition system (the 85 did). If so, upgrading to electronic ignition for about $99 will probably give you a couple more MPH at sea level (it did for my 85). Running 93 octane may also get you 1 MPH. You can always convert it to fuel injection also - a few hundred dollars later. I had checked into this but did not go there.

Good point here on the points.. If you do not change out to Electronic ignition you might want to install a new set of points, cap and rotor also.. My old Tristar ran just fine and was very low hours.. The guy I sold it to tuned it, and told me the points were burnt. New set of points turned it into a new boat.. Again it ran fine, at least I thought so.. Simple things first...

You will get no additional speed from fuel injection though. I would pass on this idea....

[JimN]

I would make sure the prop's pitch is correct and that it's not dinged.

Get rid of the points, or make sure to change them regularly, along with verifying gap,timing and dwell. Check the carb's fuel screen, change the fuel filter and do a compression test.

[mudaa]

Well couple of thoughts on being able to go 46 from 42 miles an hour. I have gotten my 81 to run 52 on virtually all the stock components. The first one is to check the engine shaft alignment. Even being off just slightly can cause a power loss to the prop due to wasted energy. The next two items can really make a difference. If you check the ignition timing and it is set to the oem spec this will cause the engine to max out power at a certain rpm. If you advance the initial timing when the engine is at idle, this will cause the motor to have more accleration out of the hole, but will loose some top end power. If you retard the timing this will cause the motor to loose some accleration and will gain on the top end. The stock oem timinig mark is usually a happy median for out of the hole and top end performance.

Additionally if you look at what jets are in the carb this can make signifigant difference. Mine came stock with 12's I changed down to a 14 and the motor responded with a lot more power. Additionally to add a few horsepower, there are some easy bolt on's.

The stock ignition coil is adequate at best. If you upgrade to an MSD or Accell HO Coil this will help. Additionally Ford Racing makes a set of (blue, black, or red) racing wires that sell for about $40 that will bump you up about 1/2 mile an hour. A cam upgrade can be done. Comp cams and Erson make two upgraded cams for Ford and GM Engines that can add a few miles an hour. Lastly just remember from chemistry, that putting in 93 octance will not make any more power. Any higer octance gas simple slows down the rate of combustion. Higher compression engines usually require higher octance gasoline to prevent premature detonation.

[jayderwin1]

i have a 86 190 with 1:1 trans and it tops out about 43 i have never heard of them topping out a 46 that seems kind of fast. my engine is completely stock other than i have electronic ignition. should my boat be going faster than this i have about 850 hours on the motor.

[east tx skier]

My 93 205 w/ 351 HO tops out at 45.5 @4600 rpm. Should be able to see if I get a little bump with the new intake manifold soon. Not expecting too much on the top end though.

[jayderwin1]

My 86 RPM tops out at about 4100

[sfitzgerald351]

My 84 with the 454 tops out at about 45 at about 4400-4500 rpms. Thats with a 13x13 OJ 3 blade with a few very minor nicks. I have the 1:1 transmission. I do need to recheck the speedos though this year to make sure they haven't changed. They were bang on 4 years ago when I bought the boat though. I'm amazed that big motor will rev up that high and am pretty pleased with the performance.

[atlfootr]

buddy has a 86' 190 Prostar, runs 41-42 mph. tried to make prop adjustments for top end speed, would like to get the boat to 46 mph for barefooting.If "Barefoot'n" is what he's after, tell him to sell it and buy one of these! :uglyhamme

1993 MASTERCRAFT BAREFOOT 200

THIS BOAT HAS BEEN VERY WELL TAKEN CARE OF!!
http://adcache.boattraderonline.com/6/8/9/78027489.htm
:twocents:

[east tx skier]

I think that boat (or one like it) is on ebay, too.

[atlfootr]

I own one of these Bad Boys already! Shown in pic' below :popcorn:
Tops speeds in the 60's plus ... :toast:

Although I didn't check EBay, I did find the one I linked in the BoatTrader.

[MarkP]

I love those.. Dont you get like 50ish, top end

[atlfootr]

Just check'd Ebay -- found this.

MasterCraft Prostar 190 (1991)
Vehicle Description - 1991 MasterCraft Prostar 190

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4526612617&category=63686

[east tx skier]

My mistake. It wasn't ebay, it was here (http://dallasboats4sale.com/index.asp?boat_type=46) . And, yes, it's the same boat.

[atlfootr]

That looks like the same .. Barefoot 200

Actually, like I said mid 60 :woohoo:
Any faster than that, I'd have to try to beat the World Fastest Barefoot'n Speed ever set - by Scott Pendelton. :headbang:http://www.barefootcentral.com/WATN_scott_pellaton.htm

[jayderwin1]

Altfootr those guy's are crazy i watched alittle bit of that footage man thats something else.

[atlfootr]

Keep in mind, how long ago that was set ...
Dout, if anyone in his rt mind would be will'n to try it now.