we're going to need a bigger truck 
My 81 F100 Project
FTE Legend
Joined: Nov 2015
Posts: 30,828
Likes: 4,094
From: Angier, NC
If the cam spec is 1500 - 4000 RPM then there is no need to push it to 6000 RPM as it most likely stops pulling at 4500 RPM and just making noise after that.
For a work horse motor the stock cam works pretty good for me pulling from just under 1000 RPM to 3000 RPM when pulling the trailer, without the trailer I shift at or below 2000 RPM.
Dave ----
For a work horse motor the stock cam works pretty good for me pulling from just under 1000 RPM to 3000 RPM when pulling the trailer, without the trailer I shift at or below 2000 RPM.
Dave ----
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Tuned
Joined: Jun 2020
Posts: 369
Likes: 113
From: Elkmont, AL
If the cam spec is 1500 - 4000 RPM then there is no need to push it to 6000 RPM as it most likely stops pulling at 4500 RPM and just making noise after that.
For a work horse motor the stock cam works pretty good for me pulling from just under 1000 RPM to 3000 RPM when pulling the trailer, without the trailer I shift at or below 2000 RPM.
Dave ----
For a work horse motor the stock cam works pretty good for me pulling from just under 1000 RPM to 3000 RPM when pulling the trailer, without the trailer I shift at or below 2000 RPM.
Dave ----
FTE Legend
Joined: Nov 2015
Posts: 30,828
Likes: 4,094
From: Angier, NC
I can run 1200 RPM @ 45 MPH, 1100 RPM @ 40 it gets a little tuff, more so when you hit a hill.
With your cam I would not be able to run that low of a RPM.
Dave ----
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Tuned
Joined: Jun 2020
Posts: 369
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From: Elkmont, AL
I would also like to know at what low RPM it starts to pull? Do you have to get it up to the 1500 RPM or will it start to pull at say 1000 RPM?
I can run 1200 RPM @ 45 MPH, 1100 RPM @ 40 it gets a little tuff, more so when you hit a hill.
With your cam I would not be able to run that low of a RPM.
Dave ----
I can run 1200 RPM @ 45 MPH, 1100 RPM @ 40 it gets a little tuff, more so when you hit a hill.
With your cam I would not be able to run that low of a RPM.
Dave ----
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Tuned
Joined: Jun 2020
Posts: 369
Likes: 113
From: Elkmont, AL
I did another haul yesterday and she pulls good from 1500rpm and up. Still have alot more trips left.
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Tuned
Joined: Jun 2020
Posts: 369
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From: Elkmont, AL
It is refreshing to see an old truck putting in real work while the new ones are being used at the grocery store and restaurants!
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FTE Legend
Joined: Nov 2015
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From: Angier, NC
Well I can tell you with a 300 six, granny 4 speed and over drive so I can split gears, drive it as a 6 speed, it is not fast but gets the job done and I look cool doing it 
That was taken a few years ago but I still get thumbs up and nice truck. Last thru I used it in the rain and got 1 of each that was cool.
Dave ----
That was taken a few years ago but I still get thumbs up and nice truck. Last thru I used it in the rain and got 1 of each that was cool.
Dave ----
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Tuned
Joined: Jun 2020
Posts: 369
Likes: 113
From: Elkmont, AL
Well I can tell you with a 300 six, granny 4 speed and over drive so I can split gears, drive it as a 6 speed, it is not fast but gets the job done and I look cool doing it
That was taken a few years ago but I still get thumbs up and nice truck. Last thru I used it in the rain and got 1 of each that was cool.
Dave ----
That was taken a few years ago but I still get thumbs up and nice truck. Last thru I used it in the rain and got 1 of each that was cool.
Dave ----
