I am getting a set of gears installed and most likely I will be going with 3:42, but should I go with 3:73 instead.
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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"
------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"
Supreme Member
You want speed as in top speed? Go with 2.73s. 
If you meant you want acceleration, go with 3.73s or 4.11s (depending on your setup). 
3.42s are good all around gears, basically great for street/strip vehicles that are daily driven.
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George P. Lara
1984 Z28
2001 SS Coming Soon
SCCA, SCFB, SC3GFB
If you meant you want acceleration, go with 3.73s or 4.11s (depending on your setup). 3.42s are good all around gears, basically great for street/strip vehicles that are daily driven.------------------
George P. Lara
1984 Z28
2001 SS Coming Soon
SCCA, SCFB, SC3GFB
Supreme Member
2.73s will get you speeding tickets, I like 3.73s myself 
Senior Member
LOL, I feel the same way. The deeper the gear the harder it is to speed!
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1992 Pontiac Firebird 350/Six Speed
1987 Toyota Pickup 383/500+ HP
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1992 Pontiac Firebird 350/Six Speed
1987 Toyota Pickup 383/500+ HP
Banned
How much of a MPG difference would 2.73 to 3.73 gearing get? Because being 17 and dailydriver, i DO care about gas mileage :P
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1992 Pontiac Firebird (stock)
- 305ci V8 TBI / Automatic Trans / Every option, excluding leather
- Killer car audio system:
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1992 Pontiac Firebird (stock)
- 305ci V8 TBI / Automatic Trans / Every option, excluding leather
- Killer car audio system:
- Aiwa CDC-MP3 head unit
- Rockford Fosgate 360a2 amp
- pair of 12" MTX Thunder 5000s in a custom box
- Pioneer 3-way 6x9s, soon to add more more more!
Member
2.73 to 3.73 would wreck your milage totally but giddy-up, does it ever make the car go.
Actually it shouldn't too bad, here's why, before I got my tranny rebuilt I had no OD, so I was pushing 2500 rpm at 65. I was getting 14 mpg, now I have OD and push 2000rpm at 65. Now I get 17 mpg, so I figured that with 3:73 doing 65 in OD will be around 2500rpm because doing 55 would be 2000rpm, so basically with OD I will be at the same rpm I was when I didn't have OD.
------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"
------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"