305tpi with 3:73 0-60
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From: Georgia
Car: 91' Z28. 70' Dune Buggy
Engine: LSX Cam/Full Bolt ons
Transmission: T56
Axle/Gears: 4.10
305tpi with 3:73 0-60
I haven't been to the track, so I can't truly relate to 60' and 1/4 mile times, however I can relate to 0-60mph times.
I have a ram air/catback 305tpi 700r4 with a stock limited slip 2:73 with 275 tires out back.
What will my 0-60 time be if I swapped to 3:73 gears. Will there be a night and day difference?
I've searched with not much luck, atleast for 305tpi with 700r4's
I have a ram air/catback 305tpi 700r4 with a stock limited slip 2:73 with 275 tires out back.
What will my 0-60 time be if I swapped to 3:73 gears. Will there be a night and day difference?
I've searched with not much luck, atleast for 305tpi with 700r4's
Last edited by Buggy Disaster; Feb 5, 2013 at 01:44 PM.
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From: Belleville, Ontario
Car: 1986 Chevrolet Camaro
Engine: 355 chevy
Transmission: t-5
Axle/Gears: 3.73 disc brakes
Re: 305tpi with 3:73 0-60
i went from 3.23 and was night and day difference, but i was one wheel peel to 2 wheel posi also
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Senior Member
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Joined: Mar 2012
Posts: 574
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From: Georgia
Car: 91' Z28. 70' Dune Buggy
Engine: LSX Cam/Full Bolt ons
Transmission: T56
Axle/Gears: 4.10
Re: 305tpi with 3:73 0-60
Did you go from 3:23 to 3:73, or 2:73 to 3:23?
Anyone else have input? Even with 3:70 gears?
Anyone else have input? Even with 3:70 gears?
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Joined: Feb 2011
Posts: 653
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From: Long Island, NY
Car: 87 Trans Am, 99 WS6, 16 Mustang GT
Engine: LB9, LS1
Transmission: 700R4, T56
Axle/Gears: 3.42 Posi, 4.10 Posi
Re: 305tpi with 3:73 0-60
3.73 is way too short for a TPI. You'd be best off with 3.42s.
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Thread Starter
Senior Member
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Joined: Mar 2012
Posts: 574
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From: Georgia
Car: 91' Z28. 70' Dune Buggy
Engine: LSX Cam/Full Bolt ons
Transmission: T56
Axle/Gears: 4.10
Re: 305tpi with 3:73 0-60
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From: Orygun
Car: 1988 Formula Firebird
Engine: 5.3 LM4
Transmission: 4L65E
Axle/Gears: 3.42 True-Trac
Re: 305tpi with 3:73 0-60
My TBI car started out life with a 2:73 rear. I swapped the whole diff for a 3:73 unit. Didn't notice any signifacant loss in mileage but the fun factor went up big time. Tall gears anywhere but the highway are just boring. I actually have 3.42s now, and its a happy medium. My 3.73 rearend blew up.
Junior Member
Joined: Mar 2013
Posts: 22
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From: minnesota
Car: 91 z28
Engine: 305
Transmission: 5 speed
Re: 305tpi with 3:73 0-60
well i would like to know what are the gears of a stock 1991 Z28 305tpi 5 speed manual... and what would happened if i upgrade to 3:73 gears?
Joined: Mar 2004
Posts: 1,643
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From: Manitoba
Car: '91 GTA
Engine: 421sbc
Transmission: Powerglide
Axle/Gears: Ford 9" with 3.89
Re: 305tpi with 3:73 0-60
When I had my 305 tpi, I went from a 2.73 to a 3.42.
I had some mods by then so the difference was night and day in low end torque.
I lost a bit in fuel mileage.
I had a hard time spinning the tires with the 2.73's, and then it was no problem with the 3.42's.
I had some mods by then so the difference was night and day in low end torque.
I lost a bit in fuel mileage.
I had a hard time spinning the tires with the 2.73's, and then it was no problem with the 3.42's.
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Joined: Mar 2013
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From: minnesota
Car: 91 z28
Engine: 305
Transmission: 5 speed
Re: 305tpi with 3:73 0-60
But doenst camaros have already 3:42s from factory? Because i was trying to find some information on this website about the gears they came out from factory, but the only gears that appeared are the 3:42s for the 305tpi 5speed manual so im confused... Was your manual?
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From: New Boston, IL, USA
Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
There are various gear ratios and even rear ends that were used in Third gens. Before picking you gears I would start by at least finding out if its a 9 bolt, 10 bolt, or Dana 44. At that point you know the ring size needed, but series of the carrier inside will depend on what gears you get too.
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