How much quicker 0 to 60 and in the 1\4 mile will 4.10s be than the stock 3.55s all else being equal?

 

How do you know they would be quicker? They might be slower!

What engine?

What vehicle?

What does the Torque and HP curves look like?

Suspension stock?

Vehicle weight?

Tires?

You might end up with a stuation where you have all the engine torque loaded in the low RPM range and you apply this torque VERY differently to the rear tires. You can end up with massive tire spin, which is MUCH slower!

BUT, I'm guessing that you're talking about a stock F150 (or like) with a 4.6 or 5.4? That said, the MOST important factor is probably HUMAN (aka driver)!


I guess I could use the situation where you can buy a late model Z28. That particular vehicle comes stock (auto trans) with 2.73's. However, you can buy one with the 1LE package that has a 3.23 ratio. I happened to own a 2.73 and a good friend bought his with the 3.23. Thats .5 of a driveshaft revolution difference! A 3.55 to a 4.10 is about the same (.55) difference.

Here is the way the Z28's were different (although, this is really apples and oranges):

3.23's - More tire spin, about 1/2 sec quicker 0-60, major difference in feel, more radical, more fun, not as quick on the highway, MUCH less gas mileage, can not just NAIL IT off the line....

2.73's - No tire spin, slower 0-60, not as much seat of the pants, less fun, nice on the highway for passing, 30 MPG highway, your grandmother could NAIL IT off the line with no problems.


For your situation, here's what you are looking at (best case):

MAYBE 1 or 2 tenths 0-60

MAYBE 1 tenth in the quarter with a 1 MPH gain.

DEFINATELY lower MPG

DEFINATELY expensive!


You would be better off buying a Superchip.

Put some thinner wall tires... That'll help some!

Good luck! Gearing is a very difficult thing to measure without testing because each application reacts differently.

 

I have a Supercrew 5.4 it has a custom superchip a powerdyne SC and i want it as qick as can be from stop light to 60 or 80.I have 0 tire spin at this time it is a Automatic. 3.55 LS. It is very slow to get going but screams after about 15 or 20 MPH. In my situation how much of a diffrence would i see with the 4.10.

------------------
2001 Screw
4 X 4
5.4 Liter
Black/Harvestgold
Lariat
Superchiped
Airaid
Captains Chairs
Towing Package
6/CD Changer
Moonroof
Sliding Rear

Wanted Dead or Alive:
Exhaust
Supercharger
Gears! 4.10??

 

Mustangs are about 0.4 quicker in the 1/4 going from 3.08s to 3.55s YMMV

 

Given your situation I would say A WHOLE LOT quicker! You obviously pumped up the HP! If you can mash it off the line with no spin then 4.10 should be perfect! You might get a little spin, you might not. The 4.10 will help your 0-30 like you won't believe!

Go for it! I think you have to change front and rear though! OUCH!

With a Supercharger and 4.10's you should feel quite a bit of the gearing change!

I've seen guys with stock Mustang GT's who change the rear and can hang with Z28's 0-60...

 

If you are looking only for 0-60mph gain then get a stall converter and forget the gear. It will do more than any gear can do. A Precision Industries #0 pump 2800 converter is just the ticket. Your highway mileage will be unaffected too. Once the converter locks it is no different than the factory converter.

Same thing goes for that LS1 Z28 Camaro!

However, for towing, don't get a high stall converter. It is too difficult to accelerate with a converter with a heavy load.

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97 4.6 F150, 1/8 = 10.885 @ 64.10 mph, 88 5.0 Mustang 1/8 = 7.191 @ 94.76 mph

 

Larry tell me more about the stall converter. How hard to install? where to buy and what is the cost/

 

Maybe I had a bad experience, but I installed a converter with a higher stall in my Z28 and it SLOWED me down!

I went to a transmission/speed shop and they installed it for about $400 - $450 (converter included).

However, guys at LS1.com rave about one particular converter for the newer LS1's. Apparently a .5 second quicker 0-60 and 1/4... I think YANK makes it?

Moreover, I have to disagree! I think you will get more performance out of the gears! The converter is not all its cracked up to be! You would be LUCKY to get 1 or 2 tenths 0-60!

THIS WILL VOID YOUR WARRANTY on your converter and they might screw with you if you have transmission problems! Something to consider!

Converter will probably shift harder!

[This message has been edited by Rand (edited 08-23-2000).]

 

I would think that switch to 4.10's will be hard on the fuel mileage!! Even with the torque converter. Considering the rear gear is the final drive.

 

what do racers and trucks w/ big meats have in common. The need for power and gears.

Yeah w/ lower gears you may get more tire spin, but anyone who takes their racing seriously knows how important gears are.
Find me a guy who runs in the 9's and see if his gearing is less than 4.56.
If you truley interested in making the next light appear at warp speed, jump up to the -4.27-4.30's.
You'll lose highway speed, but you'll get their in a hurry, your mpg will drop. As
Tony Pedergon said in a recent article in Mustangs and fast fords, "throttle control".
W/ your set up those gears should put you into the high rpms, where you need them, quickly.
If all your interested in is performance times, go gears, IMHO, 4.27-4.30's.
Also you can buy the 4.30 from ford motorsports and they are a bit cheaper from the aftermarket. Your tranny will go throught the gears quickly. It should give you great 0-60 times. Since you don't have the cam or crank to turn more than 6500, be sure you know how to shift the trans before hitting the track.
Realistically that would be the best place to learn. You'll learn how to throttle and shift to get the best times.
BTW, my friend stuck the 3.73's from 3.23 in his stang and there was LESS tire spin and his 1/4's barely changed. Another friend of his also had a stang and put in 4.10's from 3.23 and saw a big difference.
Considering your weight and size, i'd go 4.30.
The Z28 camaro shows stats of
Borg-warner T56 6spd, GM 7 5/8 10-bolt, torsen differential, 3.42:1 gears.

good luck.

 

VERY good link about stall converters, by YANK.

http://www.converter.cc/technical_discussion.htm



------------------
Rand

98 Ford Expedition 4X4 XLT
5.4, 3.73s, 17" wheels,
Homemade 3" "COLD" Air-Box
mod, SuperChip, Amsoil
everywhere but tranny, Perma-
Cool combo 6 pass trans/oil
cooler (FQR 5.4 @ 50K)