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36+ mph 35 gtr on 18x48 extreme hull
https://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=2&t=60682		 Page 1 of 2
Author:  msm8281 [ Tue Mar 10, 2015 6:12 am ]
Post subject:  36+ mph 35 gtr on 18x48 extreme hull
Another 36+ mph stage 2. Could have gotten a lil more as she was still climbing but proposing too much. Touched 37 briefly. Skinny water no proposing Probably high 37s. And I ran both ways on the bayou and couldn't tell any difference in speed so no current.

36 + mph stage 2 gtr: http://youtu.be/NG5yy2MOL6c
Author:  baron von [ Tue Mar 10, 2015 6:21 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
that is pretty cool - sounds great, looks like you are just about to achieve lift off. The boat on the GPS screen is going almost as fast as the shore line ripping by in the back graound.

That is the fastest SD I have seen on here - also sounds like you have some engine/power to spare :shock:
Author:  msm8281 [ Tue Mar 10, 2015 6:24 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
She probably has a lil more on top once I put the right timing key in it.
Author:  msm8281 [ Tue Mar 10, 2015 6:26 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
I had a stock prop worked a little. I'd say not bad for first time working a prop and getting that speed. It seems props have become the hardest thing to dial in on these things.
Author:  baron von [ Tue Mar 10, 2015 6:40 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
good job on the engine, don't blow it up before you get the prop you want.

you need to paint your whole rig some bright color now so people can see you and get the fuck out of the way 8-) the copperhead clan now has some competion :lol:
Author:  pearl river outlaw [ Tue Mar 10, 2015 6:43 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Thats getting it there Mike!
Author:  WhoDat88 [ Tue Mar 10, 2015 7:07 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
That exhaust sounds great
Author:  msm8281 [ Tue Mar 10, 2015 7:19 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Author:  ha2 [ Tue Mar 10, 2015 7:54 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Looks like a gallop. Lol good speeds though.
Author:  brickgw [ Tue Mar 10, 2015 7:55 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
I take it this the motor you were having built?
Author:  dguidry [ Tue Mar 10, 2015 8:05 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
What did Calen do to it? I've got cam, carb and muffler and thinking about heads. I find I don't have grunt in thick lilies. You're using 2 or 3 blade prop?
Author:  msm8281 [ Tue Mar 10, 2015 8:20 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Carb cam and heads Dean.

I had a worn Gt3 blade 10p Worked to a 12p with a little added cup. It's 2-3 mph faster than a stock 10p at the same rpm
Author:  270Handiman [ Tue Mar 10, 2015 10:58 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
That's great and all, but we all know the real judge of a motor is how it idles in sub-freezing temps. Please post video of a thermometer and idle compared to efi. :D
Author:  cb5331 [ Tue Mar 10, 2015 11:02 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
junk
Author:  caddobrook [ Tue Mar 10, 2015 11:08 am ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
What cam?

How much are heads decked?
Author:  baron von [ Tue Mar 10, 2015 12:12 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
I wouldn’t worry too much about cold starts in LA there junior achievement, that engine will fire up just fine :lol:
Author:  scarygary [ Tue Mar 10, 2015 1:13 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Good speeds. If you could get the bounce out you might pick up some more. Glad to see someone else running 36
Author:  scarygary [ Tue Mar 10, 2015 1:15 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Author:  doubleBanded [ Tue Mar 10, 2015 1:38 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Nice!
Author:  scarygary [ Tue Mar 10, 2015 5:26 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
I am running 4900-5000 at 36 and 5250-5300 at 38
Author:  scarygary [ Tue Mar 10, 2015 5:30 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
I'm going to play with reduction to see if I can maintain speed and drop rpm.
Author:  baron von [ Tue Mar 10, 2015 5:43 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
don't the valves "float" on these engines @ those RPMs?
Author:  cb5331 [ Tue Mar 10, 2015 5:50 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Author:  pokey79 [ Tue Mar 10, 2015 5:57 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
mike u need a full ice chest and a chicken sitting on the front deck and full tank of gas too
Author:  scarygary [ Tue Mar 10, 2015 6:05 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
I have floated the valves already and it's not something you would like to do. I saw this at 5500+. You know when you do float the valves. Engine changes sound a lot lol
Author:  baron von [ Tue Mar 10, 2015 6:12 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
what keeps the engine together @ 5500 + rpms? :shock:
Author:  Gameover [ Tue Mar 10, 2015 6:18 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Luck and prayers :lol:
Author:  JLACOUR [ Tue Mar 10, 2015 6:19 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Author:  scarygary [ Tue Mar 10, 2015 6:19 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Author:  pokey79 [ Tue Mar 10, 2015 6:29 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Author:  scarygary [ Tue Mar 10, 2015 6:30 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
I won't run long distance at high rpm 48-4900. Is where I try to cruise at. I don't run full throttle 5250-5300 often. Just if I'm playing around. I know it's going to explode sooner or later. Then I'll build another and try to improve on what breaks first. It's a great Hobby!!!! Lmao
Author:  Hernaja1 [ Tue Mar 10, 2015 7:02 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Lol I'm happy my 18/56 goes 32 empty. It has a stage 1 kit done by calen stage 2 done by rob
Author:  msm8281 [ Tue Mar 10, 2015 7:11 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
4300-4500 will be where it's at 90% of the time.
Author:  cb5331 [ Tue Mar 10, 2015 7:13 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Author:  CAJUN OUTLAW [ Tue Mar 10, 2015 7:21 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Im glad to see that aka aint the only one that can build a motor around here.
Author:  msm8281 [ Tue Mar 10, 2015 7:25 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Author:  cb5331 [ Tue Mar 10, 2015 7:26 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
:lol: There's no secrets around here!
Author:  msm8281 [ Tue Mar 10, 2015 7:28 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
Author:  Jamie B. [ Tue Mar 10, 2015 8:10 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
He is running these bad boys decked .055, de shrouded with stock size Hoyt valvesImageUploadedByTapatalk1426039800.336924.jpg
Author:  Barroll [ Tue Mar 10, 2015 8:15 pm ]
Post subject:  Re: 36+ mph 35 gtr on 18x48 extreme hull
A 36 mph mud boat that bounces is like a 75 mph fountain fishing boat in 5 ft seas.......what's the point. Just sayin....
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