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11-16-2012, 09:58 PM
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#1 |
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Registered User
Join Date: Oct 2012
Location: Forest, Ohio
Posts: 3
iTrader: (0) Bronco Info: 1981, 302, c6, 9" rear code 16. Warn lock out's. Edelbrock carb/intake. Sitting on 32's
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Trying to figure engine rpm's
I maybe am searching for the wrong things I don't know. I have searched all over Google and many forums and I haven't found what I'm trying to figure.
I am planning on swapping a 1990 7.3idi into my bronco, I am going to use a ZF6 transmission out of a 2000 powerstroke. I'm trying to figure what my engine rpm's are going to run. It is mainly going to be a road vehicle with limited off road use *Hopefully it will see moab a couple times*. The zf has a 0.72 6th gear ratio, my Bronco has a 3.50 geared 9" rear end and 32" tires. If I swap it right now using all this what will my rpm's be at 55 mph or 60. If I overlooked something let me know I cant find anything right now though...... |
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11-16-2012, 10:56 PM
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#3 |
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gone fish'n
  
Join Date: Feb 2003
Location: Maggie's Nipples, Wyoming
Posts: 20,275
iTrader: (4) Bronco Info: pile of parts
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for reference, mine turns about 2k @ 65mph. 3.73's and 32" tires.
__________________
'01 F250, 444ci of straight piped oil burning fun. 4x4, 6 spd, GTP38R noise maker, Stage 2 injektorz. Lotsa fun!  Let's Go Fishing. |
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11-17-2012, 10:52 AM
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#4 |
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Big Six
 
Join Date: Feb 2006
Location: Boise, ID
Posts: 2,041
iTrader: (1) Bronco Info: 1981 300ci 6cyl w/4bbl conversion. 4spd manual
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Here's all the formulas you'll need. You can figure out any of the following if you have the necessary information.
Tire Diameter = (Speed * Transmission Gear Ratio* Final Drive * 336) / RPM Speed = (Tire Diameter * RPM) / (Transmission Gear Ratio * Final Drive * 336) Transmission Gear Ratio = (RPM * Tire Diameter) / (Speed * Final Drive * 336) Final Drive = (RPM * Tire Diameter) / (Speed * Transmission Gear Ratio * 336) RPM = (Speed * Transmission Gear Ratio * Final Drive * 336) / Tire Diameter
__________________
 1981 & 1984. Both w/ 300 I6. Holley 600 4bbls. 31x10.5" tires. NP-435 trans. 2.5" Exhaust. Supermotors Pics |
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11-17-2012, 11:07 AM
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#5 | |
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Registered User
Join Date: Oct 2012
Location: Forest, Ohio
Posts: 3
iTrader: (0) Bronco Info: 1981, 302, c6, 9" rear code 16. Warn lock out's. Edelbrock carb/intake. Sitting on 32's
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Quote:
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