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| T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEED http://www.hpbc.ca/viewtopic.php?f=52&t=4137 |
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| Author: | Roflhat [ February 20th, 2019, 5:10 pm ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
I 100% believe the 101mph record, I've spoken to Rolf a lot, he is tuning my 70ces. I thought I had tested lots of different things on this engine but doubt I've even tried 5% of the things he has. There has been a few dyno tests of the 70ces over here, seemingly the max was 115hp, most tuned are around 95-105. |
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| Author: | LittleCharger [ February 20th, 2019, 9:46 pm ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
Roflhat wrote: I 100% believe the 101mph record, I've spoken to Rolf a lot, he is tuning my 70ces. I thought I had tested lots of different things on this engine but doubt I've even tried 5% of the things he has. There has been a few dyno tests of the 70ces over here, seemingly the max was 115hp, most tuned are around 95-105. Always knew we weren’t getting the straight goods from yeah Dok...sand bagger!! |
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| Author: | Tom Schnull [ February 20th, 2019, 10:11 pm ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
This fall on a cool day with Matt at the cottage I did manage a solid 65 mph at 6200 rpm with the Rapidcraft and Merc 60 4 stroke, when I re-borrowed the Jeff Brown SE winning prop [that I got from Jeff Baker and sold to Rick who I believe hasn't tried it yet but who lent it to Matt]. That's a 12" prop that Jeff thought was 25 pitch but I'm not certain the pitch is quite that high. Anyway, takes a while to get up to that speed 'cause the RC/Merc combo is a bit on the heavy side. Still fun, though. |
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| Author: | Hounddog [ February 21st, 2019, 12:07 am ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
Roflhat wrote: I 100% believe the 101mph record, I've spoken to Rolf a lot, he is tuning my 70ces. I thought I had tested lots of different things on this engine but doubt I've even tried 5% of the things he has. There has been a few dyno tests of the 70ces over here, seemingly the max was 115hp, most tuned are around 95-105. Thanks for the first hand information, With Rolf tuning your motor to 95-105 hp you should see the big improvement in your boats performance.....please keep us informed. |
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| Author: | sharpeye Mike [ February 21st, 2019, 11:15 am ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
Ron Hill makes a Jeff Brown cleaver if anyone is interested. I have one and it's my best prop |
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| Author: | hec2buck [ February 21st, 2019, 11:43 am ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
Is the Hill/Jeff Brown Cleaver a four blade prop? I see one that is 12 1/2" x 22" pitch on their site. |
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| Author: | sharpeye Mike [ February 21st, 2019, 7:35 pm ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
Mine is the 12.5x22 3 blade Wouldn't surprise me if it was higher in the pitch as advertised My 56 OMC Stinger with nitro foot does 68 MPH at 6100 RPM |
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| Author: | Tom Schnull [ February 22nd, 2019, 12:14 am ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
I also have a Ron Hill 3 blade over hub 12.5" 22 pitch that Kawartha re-worked a bit and cut down to 12". With that, 64 mph at 6200 rpm on the Rapidcraft/4 stroke 60 Merc combo. Of course another variable is prop height -- on the RC, centre of shaft is 1.75" below the transom. The motor could possibly go a bit higher [but gets complicated doing that with my setup]. |
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| Author: | hec2buck [ February 22nd, 2019, 12:31 pm ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
How much set back are you running, Tom? |
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| Author: | Tom Schnull [ February 22nd, 2019, 9:36 pm ] |
| Post subject: | Re: T BOAT SPEEDS AS TOLD TO ME BY OWNERS OR ACTUAL GPS SPEE |
Little as possible. I first had Bob's Machine reversible jack plates at the min ~ 2" setting, but couldn't get the motor angled in enough to get out of the hole well, based on the transom angle on the RC. So I replaced those with two Bob's wedges, installed to allow the motor to tuck in more, and that worked fine. Could I benefit from more setback? Not sure. Motor is relatively heavy, so I thought maybe it should be a little closer in. |
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