3.73s all the way. anything higher, youll be spinning the tires with street tires off the line. wheel hop like a mofo with the IRS too.....with a liveaxle, id say go with 410 or 430s. with IRS, 3.73s are perfect.
-marek
-marek
Delima - 4.10's, 4.30's, or 4.56's.
- Thread starter JAXCOBRA99
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BreBar21 said:
yea i know man i was picking so when are you going to be back up this way.
I think 410s are the best because you can still use 1st. That helps alot off the line! 456 is really nutz if you ask me, for a street car that is not just built to drag.
I had 4.30s, 4.56s, and 4.88s in my 99 Cobra at one time or another. No matter which gear I had, I always used first.
With traction, torque multiplication is your friend.
With traction, torque multiplication is your friend.
I agree wholeheartedly with Bob on this one. No matter how steep you many think a gear is, it will never make first "useless". When I switched from 3.73s to 4.56s, I didn't even notice first being any shorter, just a whole lot more punchy.
Thanks for bringing up the 3.73's. I have almost 300 at the rear and at this time cant see more than 10-15 hp added in the future. I race a few times in the season but the Cobra is primarily a show car.Mach0ne351 said:
Last year, my shop recommended 3.73's with stronger after market 1/2 shafts. I'm not sure on the 1/2 shafts, it might be added excess expense, not sure if needed. I do intend to keep the IRS and just have fun at the strip occasionally but eventually pleasure driving and all show. :-D
99E's post helps to make a good point - there is no "perfect" gear (sorry MachOne351), and the "best" gear is whatever suits an individual's goals. 3.73s might be perfect for you and you, 4.10s for you and you and you, and 4.88s for some us hardcore idiots (using that term in a humorous manner). It's all about what you intend to do with the car.
Best of luck to all.
Best of luck to all.
Bob Cosby said:
Bob Rules. :thumbsup: Experience is the best teacher.
if anyone knows anything about these cars bob does
anyone who can get one to run mid-low 11's with a little over 300 rwhp knows what he's talkin about.
anyone who can get one to run mid-low 11's with a little over 300 rwhp knows what he's talkin about.driven both a cobra with 4.10's and 4.30's. they both feel pretty similar, but for track use, go with the 4.30's since with 4.10's you'd be having to shift at the wrong point in time.
both make very streetable gears. After driving my friends car, i decided to go with 4.30's for myself, as they felt a little better than the 4.10's IMO.
both make very streetable gears. After driving my friends car, i decided to go with 4.30's for myself, as they felt a little better than the 4.10's IMO.
All this information and experiences are really great guys!. Keep it coming.. good stuff here.. These choices are not easy at all but right now I'm leaning ever so slightly towards the 4.30's as they sound like a good compromise between the 4.10's & 4.56's. They're right in the middle basically between the other two.. Not quite as steep as the 4.56's but a little more bite than the 4.10's.
-B
-B
I guess the point of this whole thread is "dont fear the gear"
i want more info on the 4.56s i am going to need to decide if i want them by the end of next month, right now i am runnin 4.10 in my car and very soon i will be upgrading my rear end with 31 sline moser axles and i am thinking about putting 4.56s in and sellin the 4.10s. What i want to know is with the 4.56 gears what rpm are you at by the end of the quarter and what rpm are you at while crusin on the highway at about 70. And my least question is, is anyone runnin nitrous with thier 4.56 gears or is that a little to steep for the nx.
TnPaulMan
Banned
I am gonna do 3.90s. I think they will help my top end out and my quarter times. I would cross in 3rd with the 3.90s.
Paul
Paul
can ne one tell me wats teh top speed on all the gears, top speed on 3.73, 4.10, 4.30 and 4.56, ne thing over 4.56 is nutz(personal opinion
what does top speed matter, do you ever top your car out??
just wonderin, i need at least 120 coz i hate drivin slow on the freeway.
will 4.30's gimme that much?
will 4.30's gimme that much?
they make the top speed higher because it allows the car to pull in 5th gear. with 3.27's the car dies in 5th gear and cant pull as high as you can with gears. and if you drive 120 mph on the freeway when not racing or with traffic you should have your license takin away and pay a huge fine. thats idiotic and dangerous to everyone on the road.
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