what will 4.56 do in my car from 3.42
Retired
Joined: Oct 1999
Posts: 3,166
From: Inside Uranus
Re: what will 4.56 do in my car from 3.42
Originally Posted by Injuneer
4.56 gears with the deep 1st gear ratio of a 93 M6 seems unusual. Which tranny do you have the M28 (3.36 1st gear) or M29 (2.97)? What diameter tires are you running?
With an M28, you'd be running 15.32:1 overall in 1st gear. With his 2.66 1st gear, he'd have to run the equivalent of a "5.76" rear axle ratio to have the same overall ratio. Something sounds odd. Are you running 30+" slicks? And of course, all the gears in your 93 tranny are different than the later years, inclucing both O/D's so it wouldn't seem reasonable to directly compare results.
With an M28, you'd be running 15.32:1 overall in 1st gear. With his 2.66 1st gear, he'd have to run the equivalent of a "5.76" rear axle ratio to have the same overall ratio. Something sounds odd. Are you running 30+" slicks? And of course, all the gears in your 93 tranny are different than the later years, inclucing both O/D's so it wouldn't seem reasonable to directly compare results.
I agree.
It's a poor idea with 26" tires....I wouldn't even do it with 28" tires.
You'll be shifting into 2nd well before the end of the 60-foot.
At 6000 rpm you top out at 102 mph with 26" tires in 4th gear.
At 6000 rpm you top out at 110 mph with 28" tires in 4th gear.
Not a great idea.
Mike
Registered User
Joined: Oct 2000
Posts: 1,665
From: Livonia, Mi
Re: what will 4.56 do in my car from 3.42
Lol who cares what speed and rpm he will be running at. Stock 10 bolt + 4.56's + M6 + hard launch on street tires = BOOOM!!! no more mph at any rpm. Don't bother.
Registered User
Joined: Nov 2003
Posts: 1,770
From: Mishawaka, IN
Re: what will 4.56 do in my car from 3.42
Originally Posted by mattybz28
The tach may be off, but I think the speedo is off more than the tach is.
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