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Normal top end RPMS?
https://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=3&t=2157		 Page 1 of 1
Author:  waggman [ Tue May 19, 2009 9:01 pm ]
Post subject:  Normal top end RPMS?
Checked the rpms wot in neutral appear to be good at 4170.
In water 2 men , 6-8gal gas tank getting 3450-3500rpm.
Speeds around 24-25mph. With only me i can get 3600-3670 and gain a mph or two. Just curious if these rpms and speeds seem normal?
Rig is a 1848 GTB w/ stock 35GT motor.
Author:  TexasProud [ Tue May 19, 2009 9:05 pm ]
Post subject:  Re: Normal top end RPMS?
Tried trimin up till the RPMs go up to 3900 or more ???

Or stickin yer pin in the other holes ???

Solo I shoot fer 3900 --- with 2 or a load 3700 seem
to give me best GPS numbers...
Author:  darrel from meraux [ Tue May 19, 2009 9:34 pm ]
Post subject:  Re: Normal top end RPMS?
i see almost exactly the same numbers as you with 31gt on 20x44 i did get a few more / smaller prop but imma try a diff hole this week
Author:  mudd [ Tue May 19, 2009 10:11 pm ]
Post subject:  Re: Normal top end RPMS?
Sounds Way off

viewtopic.php?f=5&t=2149
Author:  dog walker [ Wed May 20, 2009 3:44 am ]
Post subject:  Re: Normal top end RPMS?
You should be seeing closer to 4000 rpms when running light.When you are running is the prop about half out of the water when its trimmed up?If not try moving the pin to the middle hole.
Author:  Tulsa_Woody [ Wed May 20, 2009 6:28 am ]
Post subject:  Re: Normal top end RPMS?
Change the pin to the middle hole.


http://i155.photobucket.com/albums/s295 ... G_1798.jpg

Woody
Author:  waggman [ Wed May 20, 2009 11:47 am ]
Post subject:  Re: Normal top end RPMS?
Pin already set to the middle. Came like that when i picked it up.
Author:  Ace [ Wed May 20, 2009 11:59 am ]
Post subject:  Re: Normal top end RPMS?
Hey Wagg, I was running between 3800 and 3870 in bottom hole when my motor was stock. Moved to middle hole and got all the way to 4000 trimmed all the way up. I now have mods, tried the lower and went back to the middle. Running about 4200 rpm trimmed down a little. Trimmed all the way up, I get close to 4400.
Author:  Tulsa_Woody [ Wed May 20, 2009 12:30 pm ]
Post subject:  Re: Normal top end RPMS?
My motor is stock and i run about 3800 very top end before i can tell it is losing speed and bite...with the boat loaded with 12 gallons gas, ice chest,two batteries and three guys my top speed is around 24-26mph on gps.
Woody
Author:  JBREAUX [ Wed May 20, 2009 3:09 pm ]
Post subject:  Re: Normal top end RPMS?
when my motor was brand new it would only turn about 3700 now it'll run about 4000-3900 even with a new prop same boat same everything. thats wit a 35 gtr on a 1844 skiff and unloaded
Author:  deadbird8 [ Wed May 20, 2009 3:13 pm ]
Post subject:  Re: Normal top end RPMS?
Author:  JBREAUX [ Wed May 20, 2009 3:21 pm ]
Post subject:  Re: Normal top end RPMS?
Author:  deadbird8 [ Thu May 21, 2009 5:11 am ]
Post subject:  Re: Normal top end RPMS?
Author:  HuntingRDR [ Mon May 25, 2009 12:36 pm ]
Post subject:  Re: Normal top end RPMS?
Any of y'all tried it in the top hole?
Author:  TXSHOCKWAVE [ Mon May 25, 2009 12:49 pm ]
Post subject:  Re: Normal top end RPMS?
yep it hauls ass. :twisted:
Author:  stumpgrinder [ Mon May 25, 2009 12:51 pm ]
Post subject:  Re: Normal top end RPMS?
I love me some top hole!!!!!! :mrgreen:
Author:  idabilly [ Mon May 25, 2009 7:31 pm ]
Post subject:  Re: Normal top end RPMS?
waggman,

Are you using a GPS to determine speed? The GPS won't lie...just keep playing with trim until you get the best results.

I have always found best speed to be at 3800-3900 RPMs at my altitude, but much to my surprise, my Prodrive / Phowler runs fastest lightly loaded at 4050 RPMs. In the old boats I would have lost bite trimming up to hit 4050 RPM.

The GPS showed me...the GPS won't lie.
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