4:10's ??
 

I was talking to a performance shop last week about rebuilding my rear end with 4:10's..

the owner more or less told me he would'nt put 4:10's im my car unless I was going to use it solely for racing, he was very opinionated about 3:73's as the highest he would go on a street car....

you guys or gals running 4:10's on the street, how are they?? what rpm's at 70mph?

I have a t-5 in the car...

thx....

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Black,84 GT,ground effects,shorty headers, 'open' dual exh.,302 HO(no pollution control crap),T5,89 ported heads,edelbrock Performer manifold, Edelbrock 2122 cam,600 Holley, high volume oil pump...

4:10's on their way!!!!

if you find your gear ratios, and wheel circumference, you can figure out how many revs you'd have @70. your top speed would be lowered, your revs would almost always be higher, your gas mileage probably wouldn't be as good, but you would accelerate faster.

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If it ain't broke, make it go faster

AOL: MCVillain45

This site has a horsepower calculator and a top speed calculator. You punch in your gear and rear tire size and it will give you your mph for every gear in 100 rpm increments.

It's pretty cool.

I agree with your performance shop, I think 3.73's are a better choice for a street car with a T-5, 3.55's are a good choice also.



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fordgasm
CLICK HERE to see my 87 GT

I wouldn't recommend you go any higher than the 3.73's. The guy at the shop was right.

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'90 LX 5.0; 12K original miles (no sh*&); 3.55 gears; pulleys;Edelbrock Performer Heads; BBK shorties; MSD 6AL box w/ blaster 2 coil; Motorsport E303 cam; Pro-M 75mm MAF; BBK 70mm TB; Eibach spring kit; Southside welded subs; K&N cone filter charger; Hurst shifter; fiberglass turbo hood; A/C-less; rear seat-less; cat-less; 2 chamber Flos; Corbeau racing seats (fronts);
30# injectors; JMS Chip; 190 lb fp; TFS track heat Intake (12.299 @ 113)

Listen to someone that has 4.10's. I have them and love them! I have NEVER heard anyone that got them regret it, just people that got 3.73's regret that they didn't get 4.10's.

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87 GT, 4 inch cowl hood,17x9 Cobra R's/255/45's,GT-40 heads,Crane 2031, Edelbrock intake, long tubes headers,h-pipe,Flows,BBK cold air, Mass air,70mm MAF, 1.7's, 1" spacer,underdrive pulleys,Pro 5.0, King Cobra, Adj. fuel Reg., Lakewood Lift Bars,50/50's,subframes, 4.10's.
Best time 12.759
Best MPH 106.79
Best 60' 1.695

Visit my site at:
http://www.geocities.com/cobrar93_2000/MyPage.html



[This message has been edited by 93CobraR (edited 06-27-2001).]

I completely agree with 93cobrar, my friend just trashed his 373's for 410's and he loves them, and so do i, im getting some for sure, the 373's barely felt much different from 355's, dude i know guys running 4.30's on the street, but that may be a bit steep, but 410's are no problem.

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90 lx coupe: 175k miles, steeda water pump pully, hurst shifter, Mac cold air fenderwell, accel supercoil, ADS chip, aluminum D/S, Black magic fan, 3.27grs.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607

next mods: subframes, mac h-pipe

consider how much you will drive(daily to and from work?) your car. you can get through third gear just going through some big intersections, thats pretty busy rowing that stick, unless you dont mind reving the piss out of it all of the time.you could start in second though.my choice for a street stick car is 3.55. just another opinion.

I was running 3.50 in my 9" and had to go back to stock 2.75 because the moron that I bought the chunk from didn't torque all of the bolts. It is a huge difference right there and I'm changing the 3.50 for 4.11. My engine doesn't like low rpms and the higher gear keeps it up there in the curve.



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65 Mustang fastback
347 DFI injected, TFS, too much to say
Just about everything custom

If you drive more than 250 miles a week or do much driving on freeways/highways, you will likely regret 4.10's, and should go with 3.73's. If this is only a weekend cruiser, you will love the 4.10's. 20 years ago I had a 69 SS 396 w/ 3.08's, and put in a set of 4.11's. I will never forget what a neck-bending rush they were!! I will also never forget having rice burners blow by me on the freeway because I couldn't sustain speeds that high for that long. It all depends on how, where and how often you drive it.

Take care
~Chris

I have 4.10's but i also have an aod and i love them the only thing that you might have to adjust to is launching on street tires you will have to gradually put the gas to the floor instead of all at once so you dont spin to your tires to redline.
Oh yeah when i am on the highway i go 70 at about 2500rpm's.

I had 410s with the aod then switched to the t-5z tremec and I love the 410s still. Only bad think is that theres not much need for 1st gear in a normal t5 with the 3.35 first gear. Its a daily driver also. I drove from ohio to western Neb loaded down with weight and filled up 4 times=80 dollars. My vote goes to the 4.10's. I used to have 373s, 410s just plain more fun.

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1987 black with t-tops. Cobra intake, 1.7 cobra crane rollers, gt40p's, bbk shorties, off road h-pipe, adj. FPR, rebuilt aod w/shift kit, 65mm TB, 4.10's 12.90's at best probably less, oops I mean worse.
*** AOD's. IT'S MANUAL! Now for the T-5z!
Semper Fi