Whats the red line for rpms for a 300 6 out of a 96 f 150. I installed an aftermarket tach in my 1981 and I would like to know (realistically) what the red line should be set at, so I dont blow my new motor up 4x4'in

 

I would not go over 4K for any length of time.

 

4000 is good
The automatic transmissions behind the 300's shifts at 3600 RPM at FULL throttle...


ftwfred

 

Thanks I never take it past 3500 anyways

 

https://www.ford-trucks.com/dcforum/DCForumID9/2198.html

 

[updated:LAST EDITED ON 02-Jan-03 AT 11:09 AM (EST)]A friend's 87 F-250 with a 300 has a redline on the tach at 5700 or 5800, I can't remember. But Ford may have used the same tach on all gas engines, I don't know. And the later (and earlier) tachs don't show a redline. But I don't know why would anyone ever need to take a stock 300 that high anyway.

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1995 F-150 Supercab XLT 155" 4x4 M5OD 302
1986 F-150 4x4 NP435 300

 

5500 would be perfect. i dont really like low revving motors and i love high revvers. just the sound of it. in a truck i like 5500 i dunno why i just do

 

[updated:LAST EDITED ON 02-Jan-03 AT 11:39 PM (EST)]I never run my engine over 4500 rpm. With my new mods it pulls hard all the way there and it seems to be right back in a good spot in the power band after a WOT shift at 4500 rpm. In the past I have run it as high as 5500 or 5800 two or three times but one of those was by accident and the other two I was showin off for a girl. LOL! It makes zilch power up there just a lot of noise.

 

My motor sounds like its crying for help past 4 grand. Thats why I don't want to take it there. I might take it up to 4 when climbing hills just to pick-up the most speed. But then I put it back into fourth and it slows right down again, your dammed if you do, dammed if you don't