Any 8th mile gain to be had going from 3.23s to 3.73s?
03-12-2013, 01:53 AM
#1
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Any 8th mile gain to be had going from 3.23s to 3.73s? 94 Formula 4L60E with 3.23's.. Stock so far but about to begin installing a bunch of bolt ons.. I found a whole complete 7.5 10 bolt F-body rearend with 3.73's ready to go for $150 bucks local. I was interested in getting some better gears but wasn't sure what ratio to get.. This is my daily driver. For the price of that whole complete 3.73 rear I couldn't get the gears alone, then the install kit, and the price of having it installed... Well heck, I don't see how I could go wrong with buying the 3.73 rear and swapping them out, unless going from a 3.23's to 3.73's won't really make enough difference to make the swap worth it.. If I could drop it a couple 10ths I would be happy.. Any info, thoughts, or suggestions? Thanks guy's..
03-12-2013, 08:09 PM
#5
the kneejerk reaction would be short race need deeper gears and say yes go for it - but hold on a minute will this cause you to have to shift into 3rd just as your hitting the traps ? you may not gain if thats the case .
Assuming your crossing the traps in 2nd right now with the 323's do you know what rpm your at through the traps ? that could shed some light if theres room to still hold 2nd through the traps with 373's , if you can turn 15% higher rpm's than you are at the traps now you should be good for 373's without an extra shift/rpm drop
Assuming your crossing the traps in 2nd right now with the 323's do you know what rpm your at through the traps ? that could shed some light if theres room to still hold 2nd through the traps with 373's , if you can turn 15% higher rpm's than you are at the traps now you should be good for 373's without an extra shift/rpm drop
03-12-2013, 08:14 PM
#6
I dont have any track data of switching my 3.23 to 3.73. Tightened up the converter a little and feels good. I mainly did them because my car was already at slowhawk for a h c i install so I decided ehh, throw some 3.73 in there while its there lol
03-13-2013, 12:34 PM
#7
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I say go for it! I mean its only $150. Would def make it more fun on the street if its your DD and if you dont like I cant see you having any trouple getting your money back out of it because people are alway breaking their 10 bolts and looking for used ones.
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03-13-2013, 02:09 PM
#8
^^^ that. If nothing else, the on-street fun factor will get a big boost. I went from 3.23 to 3.73 in mine it really woke the car up. Added bonus is that leaving from a dead stop has a smaller chance of "attracting attention" on the street. I have a very grabby clutch and if I don't hit it right, it might spin the tires a little. With the 3.73s, it's easier to be civilized off the line than the 3.23s were, since I don't have to rev as high to get it rolling.
03-18-2013, 08:28 PM
#10
yes , need to enter the correct ratio in the gear/tire calculator area so the speedo will be accurate and the shift tables need to be adjusted as they require a mph as well as rpm for a shift to happen at WOT , the speed portion will be different with different gears
