rearend
02-18-2007, 05:30 PM
#1
2nd Gear Member
Thread Starter
Join Date: Feb 2006
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Posts: 202
rearend
me and my dad are building a 351w and are putting it into a 91 coupe. my question is should i put an 8.8" or just go ahead and get the 9" just to be safe. i have ot buy one either way because i only have a 7.5" in it now, so which should i go with. i will prolly be putting down about 300-320hp.
thanks,
todd
thanks,
todd
02-19-2007, 08:58 PM
#5
2nd Gear Member
Join Date: May 2006
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Posts: 236
RE: rearend
That depends on the tire size alot too.
but i would think about 3300 to 3500?
depending on what tire size you have might be less or more.
but you will be safe to drive it on the interstate for short runs.
i wouldnt go across country unless you have someone elses gas card though.
i used to drive mine to the track with 355,373, and 411., no problem with a 5 speed, and the track was 30 miles away.
actually with 355s it got better gas milleage, and it would pull out in 5th gear too, but with stock gears it wouldnt(with my old motor) pull out in 5th gear.
which i dont recomend anyone doing!!!!
but yeah i think you will be safe with 4,11s even for a daily driver, just take off in 2nd gear. cuzz you will get tired of the low 1st in it.
if its going to be a weekend warrior car, i would put 373s in it. thats an all around good gear, for a 5 speed.
but i would think about 3300 to 3500?
depending on what tire size you have might be less or more.
but you will be safe to drive it on the interstate for short runs.
i wouldnt go across country unless you have someone elses gas card though.
i used to drive mine to the track with 355,373, and 411., no problem with a 5 speed, and the track was 30 miles away.
actually with 355s it got better gas milleage, and it would pull out in 5th gear too, but with stock gears it wouldnt(with my old motor) pull out in 5th gear.
which i dont recomend anyone doing!!!!
but yeah i think you will be safe with 4,11s even for a daily driver, just take off in 2nd gear. cuzz you will get tired of the low 1st in it.
if its going to be a weekend warrior car, i would put 373s in it. thats an all around good gear, for a 5 speed.
02-24-2007, 02:02 AM
#7
1st Gear Member
Join Date: Apr 2006
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Posts: 138
RE: rearend
Here's a calculator. Just download it, works great!
Good luck
Indy
http://links.vintage-mustang.com/download/RatioMph.exe
Good luck
Indy
http://links.vintage-mustang.com/download/RatioMph.exe
02-25-2007, 12:13 PM
#8
2nd Gear Member
Join Date: May 2006
Location:
Posts: 236
RE: rearend
thats a cool calculator.. fun to mess around with...
remember that the gear ratio also is equal to a 27" tire
if that helps you out any too.
say if you have 373 and a 27 " tire, your gear ratio will be 373
if you have a 26" the gear ratio will be lower, maybe a 3.90(just guessing at it.) thats just from the rearend, and tires,not counting the transmission.
if you have a 28" tire, you will have a higher gear, maybe..350
so if you put a tallerslick on your car, you usually have to lower the gear to make it equal to the gear ratio before you changed tires out.
im gonna go play around with that calculator some more... see what my car does with some pimped out 20-fo spinner wheels and tires
remember that the gear ratio also is equal to a 27" tire
if that helps you out any too.
say if you have 373 and a 27 " tire, your gear ratio will be 373
if you have a 26" the gear ratio will be lower, maybe a 3.90(just guessing at it.) thats just from the rearend, and tires,not counting the transmission.
if you have a 28" tire, you will have a higher gear, maybe..350
so if you put a tallerslick on your car, you usually have to lower the gear to make it equal to the gear ratio before you changed tires out.
im gonna go play around with that calculator some more... see what my car does with some pimped out 20-fo spinner wheels and tires
02-25-2007, 01:28 PM
#9
Join Date: Feb 2007
Location:
Posts: 19
RE: rearend
Here is another calculator that I found you could try out http://www.midwestfords.org/analyzers.htm