T O P I C R E V I E W
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BlowN67
Member # 4229
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posted
whats a good rearend gears for amostly street drivin car with a c4. 285/35/18 tires on rear.
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50DADDY
Member # 3076
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posted
Just for reference,i had 4.10's in a 12 sec. street driven Capri.It was horrible!Couldnt hit the freeway much,and when i did the motor was singin.Had to roll in the granny lane and still revved to high for my comfort.3.73's would probably be more bearable.Just my .02$.
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BlowN67
Member # 4229
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posted
i was actually thinking in the 3.08 range or maybe even 2.73 i dont its something new to me never really had auto's
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Blind
Member # 3052
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posted
my brother in laws maverick has a C4 and 3.00 gears from factory, seems like a good match if you have a nice stall to get it moving.
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Duncan Motors
Member # 7045
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posted
325 is a good gear u might get a away with a 355 or somethin close cause of the 18 rims. just my thoughts. had the same set up with 245 45 17 and like it dont rememer the rpms at any speeds but 120 plus and the motor never went over 45 i think or it was close.
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BlowN67
Member # 4229
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posted
i'm thinking 3.08's would be good cause my ultimate goal witht he car will be a street drivin turbo setup
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306mustang
Member # 9204
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posted
am gonna have some 3.08s for sale for cheap after i get some 3 73s for my cobra
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BlowN67
Member # 4229
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posted
acutally will be looking for a complete sn95 rearend soon here
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Stangs R Us
Member # 4495
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posted
3.27 / 3.08 either way
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racsirx
Member # 1710
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posted
26" tall tire-3:27 gears
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87TURBO
Member # 9257
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posted
i also have a c4 and i recoment 327
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BlowN67
Member # 4229
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posted
i will be driving it a 105 mile round trip when i do drive it so low rpms on freeway would be nice
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onesicklx
Member # 285
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posted
i run a c4 with 27" tall tires and run 3.27 gears...good luck
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BlowN67
Member # 4229
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posted
quote: Originally posted by onesicklx: i run a c4 with 27" tall tires and run 3.27 gears...good luck
do u have any mph to rpm's u can share so i can make some judgements on which to go towards
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uncle bill
Member # 3953
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posted
john, go to tciauto.com their website has a racing calculator you can punch in your specs and get the info your looking for
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BlowN67
Member # 4229
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posted
quote: Originally posted by uncle bill: john, go to tciauto.com their website has a racing calculator you can punch in your specs and get the info your looking for
Those are some great calculators. Thanks
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wilit
Member # 3367
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posted
I've got a C4 and 3.08's in my '68. With 245/45/17's it runs about 2500rpm at 60mph. 70mph is about 2750-2850rpm.
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BlowN67
Member # 4229
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posted
ouch really... this is suckin big time. i guess a c4 isnt really made for daily driving.
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wilit
Member # 3367
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posted
quote: Originally posted by BlowN67: ouch really... this is suckin big time. i guess a c4 isnt really made for daily driving.
I've got an AOD in the garage, however, I plan on moving up to 3.73's. I figured I'll probably be turning about the same RPM's per MPH with that combo.
As for daily driving, I drive mine to school and back every Wednesday. Its about 35 miles round trip and I get about 16mpg with a stock '85 longblock and basic bolt-ons like an Edelbrock intake, carb, and long tube headers.
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