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-   -   3.27 or 3.55? (http://forums.mustangworks.com/showthread.php?t=17972)

Scappoose 01-03-2002 07:16 PM

3.27 or 3.55?
 
Which to go with? I have the stock 2.73s and I'd like a little more kick, but I'm still driving this car 60-70 miles a day, so gas mileage is a concern. I won't be drag racing (except when those imports try to pass me on the right), but as I make a few mods I plan to do some autocrossing. Is there a noticeable gas mileage or performance difference between the two? Thanks.

Coupe5oh 01-03-2002 08:07 PM

i went from 3.08 to 3.27, notice a very little difference in mileage or performance, but i didnt want 3.73 at the time, i like to cruise around 80 mph and stay under 2500, but on the strip id like some 3.55-4.10's.....oh well.

Fox Body 01-03-2002 08:29 PM

Scappoose, 5-speed or 4 speed? If you have a T5, go with the 3.55s.

Scappoose 01-03-2002 08:32 PM

Sorry. 5-speed. And for now, other than cold-air induction, bone stock.

Blownpony91 01-03-2002 08:40 PM

When my car was pretty much stock i went with the 3.55's and i love them. i have an aod, and i spend alot of time on the roads everyday and the gas mileage isnt that bad.
id go with the 3.55's

lx mike 01-03-2002 09:45 PM

go with the 3.55's and don't worry about your mileage dropping. I have 3.73's and i get 25 m.p.g at 70-75 m.p.h.

NO SLO PK 01-04-2002 11:39 AM

I have 3.27s. As said above, they're great for freeway crusiing at 80+. At the strip, you'll wish you had 3.55s or stronger. I guess it depends on how much time you'll be at the track. I'd make a selection based on where you'll be spending the most time...street or track.

Scappoose 01-04-2002 11:51 AM

Not too much occasion to go 80+, or even 70+. 70 is about max on I-5. Too many cops around Portland/Salem/Eugene. And they pull you over in a second. At least they do me.
3.55's sound like the way to go. Thanks for all the input.

MustangDanny 01-04-2002 01:18 PM

3.73's are not too bad. I would go with them. You won't be dissapointed.

gtsr515 01-04-2002 03:31 PM

I've had every 8.8 gear from 4.30's down and i can tell you that 3.55's are the worst draggin gear, go with 3.73's

Umoplata 01-05-2002 03:33 PM

3.73's all the way baby!

8850 01-05-2002 06:12 PM

My 3.27 gear is not too bad at the track! 1.394 60', 10.324 et...

Really it depends on what you want to do and how you are set up. For your particular application I would stay with the 2.73. If you are not going race anybody from zero why change gears? From a roll the 2.73 will be just as good as a 3.73, maybe better depending on speed.

One concern is your clutch. It will last longer with a lower gear. Takes less slippage to get you moving the lower the gear. A 3.55 or even 3.73 would be a good street/track compromise if you planned to race at the track.

89 ATI 01-05-2002 07:26 PM

I have had 3.73's and the 3.55's in my car. For driving on the street, 3.55's are the way to go.

Chevyguy 01-06-2002 11:51 PM

My 2.73 are just sooo tall, sometimes I have to downshift to 4th on the highway cus 5th is geared to about 250 mph at 6000 rpms.

3.73's will certianly hurt your highway mileage compared to the 2.73's no matter what the other guys say. For a mostly stock motor going higher than 3.55 with a T-5 may slow you down since the motor would run out of breath at the end of the 1/4 mile. If you have a intake swap this will greatly improve the high rpm breathing and make the 3.73 or 4.10 more usefull


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