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Old Jul 14, 2006 | 04:12 PM
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From: north carolina
what do you think?

i have 01 with a 4.6l motor. my truck is geared 3.08 and i am going to a 3.73. i have been told that this will make the horse power numbers go down, but i will fill the power better because of how it shifts the power band to a lower rpm. so what do you guys thank about this? and do you feel that a buck 50 is a good price? thanks to any and all that respond.

furrby
 
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Old Jul 14, 2006 | 05:35 PM
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you car changing the number by about 20%. that means the motor will be running 20% faster at 40 MPH and 20% faster at 60 MPH, etc. so when you were running 1500 RPM, you will now be running 1800 RPM. at the higher RPM you will be getting more horse power with the same ground speed. this normally give you much better acceleration, better around town driving, and a little faster RPM when cruising, so you milage on the intersatat may go down a little. if you were lugging the motor befor, you may actually get a little better milage at the higher RPM.
 
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Old Jul 19, 2006 | 07:23 AM
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thanks steve(ill) for responding. i have read about the how the rpms will change and i understand how this will affect the power band. i quess what i was wanting to know, does it make a big different? will i feel it like it like i felt the exhuast work i had done? or will it be more like the tb spacer i pulled off? the tb spacer was only good for an extra 1 mpg. i just want to get a better power range and a better off the line pull. so do you think that that going from 3.08 to 3.73 it too low or do i need to go with like a 3.43 or 3.55? thanks to any and all that respond.
 
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Old Jul 19, 2006 | 09:53 AM
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You will feel alot more pull from lower rpms with the 3:73's, you might want to consider 4:10's also since it won't cost you much more, that will really give your 4.6 some life to it!
 
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Old May 13, 2015 | 11:05 AM
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I think that furrbys message good and it's really helpful to some people
 
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Old May 13, 2015 | 11:16 AM
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On my 06' F150 if you add more power to the 4.6 small block do you have to change the torque converter
 
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Old May 13, 2015 | 05:09 PM
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I don't know what you mean by more "power"... the original post was changing the gear ratio on the rear axle by 20%... as mentioned, if your moving at a fixed speed down the road and the motor is running 1500 RPM, let say you have 100 HP... change the gear ratio 20% and the motor is now running 1800 RPM at the same ground speed. Now your motor is putting out maybe 125 HP instead of 100 HP. That makes it easier to pull a camper, accelerate on the highway, etc... No, you do not need a new converter to go with the gear ratios.
 
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Old May 13, 2015 | 08:42 PM
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what I meant by more power is adding a cam, headers, supercharger etc
or something like that but I went to do it for not much money do you have any ideas








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