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Thread: Yamaha 130 V4 Project Build.
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09-23-2016, 05:20 AM #1531
Screaming And Flying!
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Great thread
How about degreeing the exhaust port just put something accros the piston and into the port and wind it till it locks so you can compare the port heights in degrees and not height.
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11-12-2016, 10:09 AM #1532
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46 degreed on the Suwanee river this morning. Finally got a chance to let her eat with the new port work and short tuner.
101 mph at 7000 rpm.
13' Biel tunnel AKA "Flight Risk"
13" Modified Yamaha V4 - 101 mph
21' Paramount
Mercury 300 Promax
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11-12-2016, 10:23 AM #1533
6000 RPM
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Congratulations on achieving a goal that not all that long back was not a stated goal.
Regards,
Charlie North
If it ain't broke, modify it.
80 21' Superboat with Yamaha 225 Excel power
76 Glastron to be powered by a 6.2 L92 with surface drive
87 Glastron CVX20 Hull
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11-12-2016, 11:15 AM #1534
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Originally Posted by Mr. Demeanor
46 degreed on the Suwanee river this morning. Finally got a chance to let her eat with the new port work and short tuner.
101 mph at 7000 rpm.
Attachment 360473"Congratulations" you've earned every mph.
p.s. better change you sig picture, 97.4 is history.Wriggleys gum makes me think of boating, "Double your engines, Double your fun"
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11-12-2016, 05:45 PM #1535
7000 RPM
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What are you estimating the HP to be?
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11-12-2016, 06:55 PM #1536
8000 RPM
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Awesome job.
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11-12-2016, 07:06 PM #1537
6000 RPM
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no lie! Originally Posted by NICE PAIR
81' HYDROSTREAM VECTOR / slightly Modified 200
before and after:http://www.screamandfly.com/showthre...inished!/page3
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11-12-2016, 07:14 PM #1538
8000 RPM
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CONGRADS!!!!!!
Thats great Chris......what a goal to conquer and now enjoy! Think I'll break open a hard cider and have one for ya! 
Gary
"12" Super Lite Tunnel (11') "88" 25 Yammy twin carb "BANANA SPLIT"
"77" Hydrostream Viper "87" 140 Rude heavy modded w/15" mid, Bobs nose and lwp "DANGER ZONE"
"72" Checkmate MX-13 "80" 75 Rude w/15"mid and Nitro Lu (to be restored)
"Too much is never enough" Keith Richards " Dreams become reality via hard work and perseverance" G.A.Carbonneau
"This coming from an old man that strapped two bananas together, hung a motor on it and calls it a boat" XstreamVking
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11-12-2016, 08:18 PM #1539
5000 RPM
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Nice job!!
well deserved!
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11-13-2016, 07:19 PM #1540
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Tough to say but based on speed using the HP calculator I think we are around 180 or so. Originally Posted by 2.5-21
13' Biel tunnel AKA "Flight Risk"
13" Modified Yamaha V4 - 101 mph
21' Paramount
Mercury 300 Promax
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11-13-2016, 07:25 PM #1541
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Just back in town from the Suwanee event. Lots of video was taken I have to get from the other guys.
On Saturdays morning run I think I was still the slowest boat LOL. Dave ran 127, Bishop, 106, etc.
We lauched the boats at 7:30am and it was 46 degrees. The others were milling around so I ran down to the spot and it was a sheet of glass with a thin layer of fog just over the water. Very cool looking. I went ahead and started easing it up seeing how it felt and never even went above neutral trim. She felt completely planted and on rails so I stayed in it and it stopped at 101mph. I did show Bishop my GPS zerod out before and 101 after the run for good measure.
After the other guys ran I went ahead and made a second pass getting up to speed a little quicker. I wanted some video and she ran 101mph again.
When I get the video Ill post in general boating. I want to thanks everyone who has helped me get there.13' Biel tunnel AKA "Flight Risk"
13" Modified Yamaha V4 - 101 mph
21' Paramount
Mercury 300 Promax
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11-13-2016, 07:40 PM #1542
Screaming And Flying!
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Just ran the numbers and my prop slip (same prop) was down from 9.46 on the 97.4mph at 7100rpm run to 3.67 on the 101mph at 9620 run.
Strange as I actually had a little cup taken out of the prop (same prop both runs). Boat likes the extra setback I guess.13' Biel tunnel AKA "Flight Risk"
13" Modified Yamaha V4 - 101 mph
21' Paramount
Mercury 300 Promax
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11-13-2016, 09:55 PM #1543
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I got this pic from the run. Again, I was being very conservative with the trim. This pic looks really wet. Much more so than previous top end runs. Theres definitely more there but I honestly have no reason. I knew it felt really planted but the number was there and I had no desire to bump it up. Ill bet theres at least a couple more in it based on the trim but it could also be a blowover. Im very happy with what it ran at a safe trim level.
13' Biel tunnel AKA "Flight Risk"
13" Modified Yamaha V4 - 101 mph
21' Paramount
Mercury 300 Promax
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11-13-2016, 09:59 PM #1544
Screaming And Flying!
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Definitely negative trim. Im usually neutral for best top speed.
13' Biel tunnel AKA "Flight Risk"
13" Modified Yamaha V4 - 101 mph
21' Paramount
Mercury 300 Promax
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11-13-2016, 10:17 PM #1545
6000 RPM
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Congrats Mr. Demeanor !!! Love this little boat.
1) 1995 14' Bayliner Restoration <--Click
2) Home-Made Tunnel-Boat Project <--Click
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