3.07 rear good for performance???
Thread Starter
Pro
Joined: Apr 2002
Posts: 605
Likes: 0
From: Outer Banks NC FIRST IN FLIGHT
3.07 rear good for performance???
Is the 3.07 gear ratio a good ratio to have if you plan on moderate perfromance upgrades, heads, cam, intake, headers, and roller rockers etc.?
Thanks
Thanks
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: 3.07 rear good for performance??? (Kizmo)
How high is up??? It depends on the engine, and your wants and needs. A lot of guys with 2.59's, covet 3.07's. Mine came with 3.07's, and *I* want more. Every ratio, is a "good ratio"...for SOMEthings and SOME people.
RACE ON!!!
RACE ON!!!
Race Director
Joined: Nov 2000
Posts: 10,343
Likes: 668
From: Beverly Hills (Pine Ridge) Florida
Re: 3.07 rear good for performance??? (Kizmo)
With decent street tires, and the 3.07 plus the low gear of the 700-R4, I can fry the tires on launch, and in 1st to 2nd shift (87 Z-52). Any more gear, and the tires would be gone in no time. Now slicks at the track is a diff. matter.
Plasticman
Plasticman
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: 3.07 rear good for performance??? (Kizmo)
I just thinking about a decent street car with some back bone to it but also good at highway crusing speeds.
Is the 3.07 gear ratio a good ratio to have if you plan on moderate perfromance upgrades, heads, cam, intake, headers, and roller rockers etc.?
What engine ???
What transmission ???
What heads ???
What cam ???
Aw, nuts! Come to think of it... for you, 3.07s are perfect !!!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
Re: 3.07 rear good for performance??? (Kizmo)
Anyone know if the 3.23 ring and pinion from an F-body rear end would fit a series 3 carrier for our cars? I'm guessing not, due to different configuration of the differentials.
Bench Racer
Joined: Feb 2003
Posts: 4,201
Likes: 15
From: Palm Beach Gardens FL
St. Jude '03 thru 14,'25
Re: 3.07 rear good for performance??? (Pete K)
The only rear gears for a dana 36 I know of is richmond 3:55 and 3:75. F body gears won't work :auto:
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: 3.07 rear good for performance??? (Kizmo)
Is the 3.07 gear ratio a good ratio to have if you plan on moderate perfromance upgrades, heads, cam, intake, headers, and roller rockers etc.?
It is still a good ratio to have.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: 3.07 rear good for performance??? (tobijohn)
Late model F body = GM 10 bolt axle.
C4 = Dana axle.
= No intechangability of parts.
Dana 44 ICAs have a 3.33 ratio available. The 3.31s were offered for 36s in '84, only, as stated. They were offered as the "performance" ratio, and could only be ordered as a separate option, and only IF the Z51 handling option was also ordered. Very few cars got the 3.31s. Dana, and consequently, GM, have long since discontinued them. The 3.07s are the only, origional equipment, currently available, ratio, gears, that fit the 3 series Dana 36 case. A set of 3.31s DO turn up every now and then. Some aftermarket gears are made with a "thick" ring gear, to fit the 2 series cases. Just make sure what you are offered, fits what you have. Good luck, and...
RACE ON!!!
C4 = Dana axle.
= No intechangability of parts.
. I've also heard that there are OEM 3.33 gears that were offered for a year or two only (I think they might have been available in the 84) but they are as hard to find as hen's teeth...
RACE ON!!!
Instructor
Joined: Feb 2004
Posts: 248
Likes: 0
From: Seneca SC
Re: 3.07 rear good for performance??? (CFI-EFI)
my 1995 convertible LT1 came from factory with the G92 option and G44 3.07's and i love it. It is auto so the 3.07's really make a difference compared to some with 2.59.
i love my 3.07s just right for me but if you plan to drag maybe 3.54 will be what you need?
i love my 3.07s just right for me but if you plan to drag maybe 3.54 will be what you need?
Drifting
Joined: Jun 2002
Posts: 1,305
Likes: 11
From: Savannah Ga.
Re: 3.07 rear good for performance??? (wildman738)
From my experience with my 94LT1 A4.....the 3.07 is the best gear for moderate performance up-grades.....my frist mod was 3.54s love them ...off the line in a street race could not punch it street tires spinned!! HAD TO LEARN HOW TO ROLL AND LAUNCH the LS1 guys ate my lunch....next mod PE exhaust loss just the right amount of low end torque cuold launch better but not perfect, slight spin, LS1 guys ate me up on the top end I could hang on there bumper almost for a 1/4 mile....next mod 2600 stall TC and PRObuilt transmission with trans-go shift kit ...launch like a bullit for only two launches... before I could get to the LS1 guys the dana 36 blew!!..I put back on the 3.07s.. to my surprise the performance was magic!!..I also took off the cats ...and started laucnhing off the line in my street tires with no spin...I can now punch it from a dead start and the thicker 3.07s in the dana 36 is holding up...now i can take full advantage of my 2600 stall torgue converter with no spin....I'm faster and more consistant off the line with more top-end engine power left than the 3.54s left......and I SMOKED AN LS1 CORVETTE OFF THE LINE AND HE WAS ON MY BUMPER FOR THE 1/4 MILE..IT'S ALL IN THE COMB :cheers:
Bench Racer
Joined: Feb 2003
Posts: 4,201
Likes: 15
From: Palm Beach Gardens FL
St. Jude '03 thru 14,'25
Re: 3.07 rear good for performance??? (redcorvettedave)
....next mod PE exhaust loss just the right amount of low end torque cuold launch better but not perfect, slight spin, LS1 guys ate me up on the top end I could hang on there bumper almost for a 1/4 mile....
Drifting
Joined: Feb 2004
Posts: 1,277
Likes: 1
From: Santa Maria CA
Re: 3.07 rear good for performance??? (tobijohn)
theres some pretty bad vettes here that can run great times with the 2.59's! not that i'd say go backwards or anything.just sayin..... :cheers:
[Modified by SHINOBI-X, 6:52 AM 2/25/2004]
[Modified by SHINOBI-X, 6:52 AM 2/25/2004]
Instructor
Joined: Sep 2002
Posts: 210
Likes: 0
From: Southfield Michigan
Re: 3.07 rear good for performance??? (SHINOBI-X)
2.59 gears in my stock 86 snap my head into the headrest pretty good. That and when I launch I fing it hard to not break the tires loose. Even barks then at 20 sometimes.
As was stated above keep what you have and see if you are happy. If not go bigger.
O yeah that and I like seeing 28-30 MPG on those long trips :D
As was stated above keep what you have and see if you are happy. If not go bigger.
O yeah that and I like seeing 28-30 MPG on those long trips :D
Drifting
Joined: Jun 2002
Posts: 1,305
Likes: 11
From: Savannah Ga.
Re: 3.07 rear good for performance??? (tobijohn)
-------------------------------------------------------------------------
QUOTE..[ sorry Dave, end of the week and the brain isn't working too well. What does PE stand for? Thanks...]-------------------------------------------
POWER EFFECTS CAT-BACK EXHAUST
Racer
Joined: Jan 2002
Posts: 473
Likes: 8
From: Shreveport LA
Re: 3.07 rear good for performance??? (Kizmo)
I wouldn't consider my mods 'over thr top' or anything, yet I can still spin the tires from a roll in 1st & 2nd gear with 3.07's. No need for anything lower than that really. If you're running a warmed over engine and a Dana36, I would guess that anything beyond 3.07's and you'll be looking to replace the differential before long. If you go 3.55. or better I'd consider stepping up to a Dana 44.