Predator

Say, for example, two M6 f-bodys with about 400rwhp made a top speed run, one equipped with 3.42s, and the other with 4.10s. What would be the top speed of both cars, approximately? Since the 4.10 car would pull better in 5th gear, does that mean in the real world, not theoretically, the 4.10s could obtain a higher top speed?

mustang93

iTrader: (7)

The car with the 4.10 will Get there faster..

Predator

So are you saying the top speeds would be the same since the hp is the same, just that the 4.10 car would reach that top speed sooner?

CarCraze

The 4.10 will be quicker and reach top speed faster. the 3.42 will have a higher top speed potential but both are going to be about the same because you wont have enough HP. the 4.10 will net a better performance and will only get slighty less gas milage than the 3.42.

Speed Density

iTrader: (38)

4.10s are amazing! Thats my .02

YOUNG

iTrader: (3)

I installed 4.10 gears in my car and can still pull it to 150 with no problem. With the factory gears the car was really working hard to achieve this,now with the 4.10's the car hits top speed faster and will pull 6th gear all the way to the revlimiter.

Judge Smales

iTrader: (13)

Do you have the 4.10 gears in the stock 10 bolt?

Predator

According to the gear/rpm calculator you'd be doing 223 mph at 6k rpms in 6th gear with 4.10s. I know you weren't going 223 mph, but if you're going all the way to the rev limiter in 6th gear you would have to be. I don't see how that's possible, unless you got 1000+ hp??? You got some explaining to do mister.

Thanks for the replies fellas!

YOUNG

iTrader: (3)

Yeah the gears are in the stock 10 bolt. I don't always believe the calculators that are used,but I can say that the car will pull to redline in 6th on a good long straight away. It doesn't feel that stable but I have done it several times.

z_speedfreak

iTrader: (3)

hm.. some thing stinks in here considering you obtain top speed in 5th gear...6th gear over 150mph just doesnt have enough tq with the .5x overdrive and will barley keep the speed constant never mind accelerate to the red line, do you relize how fast you would be going???

davered00ss

iTrader: (4)

I've had my car to 155 with the 4.10's

Predator

That's pretty good! What happened at 155? Run out of gear, *****, or both?

Predator

From the calculator I see that if you take it to about 6200 rpms that is about 155 mph as Dave said, but what happens, with 4.10s, when you shift into 6th after redlining in 5th? Does the car slow down, or can you accelerate past 155 mph?

yekta

iTrader: (8)

well i did 155+ [160 i guess] with my stock M6 10 bolt 3.42 gears [ car is not stock, gears are stock ] Its almost impossible to see the 6k rpm on 6th, be more realistic pls... 4.10's will decrease your top speed 5-10 mphs maybe but you will get there way faster

I need to get my gears installed soon

Predator

Thanks for the feedback!

So it's basically the 5 or so mph you lose in all the gears, with 4.10s.

chipz

410 will get their faster if it doesnt break a tooth or two, 3.42 will out pull

granted both cars are the same

yekta

iTrader: (8)

Go check for yourself, put the current data in and look at the slip

then change the gear ratio and compare new slip to the other

http://www.f-body.org/gears/


That's how I know
Btw its sticky under Gears & Axles

Predator

Thanks, but the calculator doesn't tell you what happens, in the real world, when you shift into 6th after redlining 5th (with 4.10s). I was just curious if the car would pull in 6th with 4.10s as opposed to slowing down with 3.42s.

SSCamaro99_3

iTrader: (1)

I doubt it would pull very far if at all once shifted into 6th (even with 4.10's). There just isn't enough power to pull the .5 gear. The gearing just isn't right. For a magazine article in 1994, a Lingenfelter 383 package Formula went 192 in a top speed shootout. The car ran a 3.23 gear and was a 6 speed. 192 was acheived in 5th gear. Although my car would cruise very nicely at about 120 in 6th with the 3.42's.

Predator

Thanks SS, I get the picture, not that I have plans of redlining 5th, but I was curious is all. I'll be installing a 12-bolt with 4.10s this spring, so I'm trying to find out all the differences between them and 3.42s. Thanks again.