240 rpm range??
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Tuned
Joined: Oct 2003
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From: Wichita, KS
240 rpm range??
What is a good rpm range for the 240/300. im used to v8's that you can cruise at 3000 for as long as you want. but on a six is that to much. I have 4.56 rear with 32 inch tires which puts me at about 63 mph at 3k. is that pushing the engine to much? I really dont want to change the gearing cause I dont care to go fast in a 66' I6 and with the granny gear its a brute. anyway just curious
Thanks
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Laughing Gas
Joined: Jun 2003
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From: Parkville, MO (KC)
First, I second the question -- I have been meaning to post the question as to max allowable sustained RPM in a 240, as well as info about the "power band" or sweet spot for torque in the 240.
I am pretty sure as well that the answer is different for the 240 (much shorter stroke) than the 300. My impression is that the 240 behaves much more like an 8. Becuase of its shorter stroke, it can handle pretty high revs and hang in there.
The 300 is also a brute of a motor, but gets its torque much lower. I read a lot of stuff over on fordsix.com where they are pretty fanatical about the 300 The 240 is less well represented.
If you find a definite answer, do let us know.
later....
I am pretty sure as well that the answer is different for the 240 (much shorter stroke) than the 300. My impression is that the 240 behaves much more like an 8. Becuase of its shorter stroke, it can handle pretty high revs and hang in there.
The 300 is also a brute of a motor, but gets its torque much lower. I read a lot of stuff over on fordsix.com where they are pretty fanatical about the 300 The 240 is less well represented.
If you find a definite answer, do let us know.
later....
Senior User
Joined: Sep 2003
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From: Houston TX
You can do 3000 rpm all day long with a 240 or a 300. Faster than that I imagine... Max HP with the 240 is at 4000 rpm, vs the 300's max at 3600 rpm. Mainly due to the shorter stroke.. Max torque with the 240 is about 2000-2200 rpm. Max torque with the 300 is much wider range and from 1400 to about 2100-2400 rpm. The 300 has about 50 ft/lb more torque in that range, and about also about 50 more HP. If you had a 240 and used an OD tranny, 2000-2200 would be a good cruise rpm. MK
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From: Oregon-Take me wheeling..
i know on my 300 i shift at 2600 every time when im crusing, but if im puching it ill go to 3000, after that i feel like i lose a lot of hp and troque, and it just sounds stressed too much
Callen
Callen
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Joined: Sep 2003
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From: Houston TX
Thats what it says in the 67 ford truck brochure. They give both net and gross numbers. Gross torque, they give 234@2200 for the 240, and 283@1400-2400 for the 300.
Net torque, they rate the 240 as 218@2000. Net torque for the 300 they list 272@1400-2100.
As far as gross HP, they list the 240 as 150@4000 hp,
170@3600 for the 300.
Net HP, 129@4000 for the 240, 150@3600 for the 300.
These numbers are straight from ford for 1967...
As far as cruising, yes, 3000 rpm will sound a bit high, but I don't think it will hurt the engine. There is no point in going much over that though. When shifting through the gears, I rarely go to 2500 when shifting from 3rd to 4th. But I'll run 2700-3000 on the road at steady speeds. They wouldn't rate a 240's max @ 4000 rpm if it wasn't capable of it...
On my truck, I consider 3000 about my real world redline just to save on engine wear. I usually putter along at 2700-2800 or so. I'm still breaking in a rebuilt engine...MK
Net torque, they rate the 240 as 218@2000. Net torque for the 300 they list 272@1400-2100.
As far as gross HP, they list the 240 as 150@4000 hp,
170@3600 for the 300.
Net HP, 129@4000 for the 240, 150@3600 for the 300.
These numbers are straight from ford for 1967...
As far as cruising, yes, 3000 rpm will sound a bit high, but I don't think it will hurt the engine. There is no point in going much over that though. When shifting through the gears, I rarely go to 2500 when shifting from 3rd to 4th. But I'll run 2700-3000 on the road at steady speeds. They wouldn't rate a 240's max @ 4000 rpm if it wasn't capable of it...
On my truck, I consider 3000 about my real world redline just to save on engine wear. I usually putter along at 2700-2800 or so. I'm still breaking in a rebuilt engine...MK
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DeenHylton
Ford Inline Six, 200, 250, 4.9L / 300
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May 2, 2001 10:29 AM
