woulld 4.10s be bad idea

if i am going to be doing road racing and some drag racing??

any pros/cons you can think of???

 

I have yet to hear one negative about 4:10's... negative do not come as easily as positives.. but I use to run 4:56 gears on the street...

 

4:10's turned my car from spirited into :eek: Don't worry, be happy. :thumbs:

 

If he has a Z06, this is about the ratio he would have compared to a MN6 car.

A 4.10 might be excessive on a Z06

 

You know that we're all going to say that 4.10's are an excelent idea. You know why?......Because it is. Dont fear the gear.

 

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You know that we're all going to say that 4.10's are an excelent idea. You know why?......Because it is. Dont fear the gear.


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:iagree: GOT MINE..............LOVE EM :thumbs:

 

Consider 1st gears of M6, M12 and Muncey 220

1st/ rear gear / Final Drive

M6 2.66:1 * 4.10 = 10.91

M12 2.97:1 * 4.10 = 12.20

M220 2.20:1 * 4.10 = 9.05

An old Muncey with 5.57 gears = 12.25 final drive ratio. Pretty close to the M12 1st gear!!! :D But then we have 6th :yesnod: :thumbs:


[Modified by Bink, 11:05 PM 3/16/2004]

 

now that's how you enable envelope 60fts :smash:

 

Temendous mod!! You won't regret it.

Maybe one regret........you didn't do it sooner!!! :rofl:

 

anyone with an actual z06 though that has them???


also about how much total cost is involved in getting these i think it is $1000 for the rear correct??

 

I've got them (4.10s) on my 03 Zo6 for about 8000 miles on them and the CAR ROCKS with the 4.10s. That being said however, you can forget traction on the street/track unless you run something equivalent to BFG KDs or drag radials as traction with my stock supercar tires in first and second gear is usless but with my bfg drag radials (315s) the car DEAD HOOKS on the STREET! :cheers:

 

what type of mileage ya seeing with the 410's? was there a significant drop???

 

Gear Ratios

LS1/ MM6 .................... LS6/M12

1st Gear.......... 2.66:1 ............ 2.97:1
2nd Gear.......... 1.78:1 ............. 2.07:1
3rd Gear .......... 1.30:1 ............ 1.43:1
4th Gear .......... 1.00:1 ............ 1.00:1
5th Gear........... 0.74:1............ 0.84:1
6th Gear........... 0.50:1 ............. 0.56:1


Reverse ............. 2.90:1............. 3.28:1


You'll just use 5th and 6th more.:yesnod:




[Modified by Bink, 12:22 AM 3/17/2004]

 

:iagree:

Very true. I find cruzing on Interstate at 80Mphs to tack ~2200rpm and occassionally wish for a 7th gear. It's not bad, but I get a little concerned about the heat that might build up with sustained travel at that speed.

Now, with that said I don't usually run 80+mph for long periods of time except heading to the strip about 1.5 hours away.

Go for the gear! :lol:


[Modified by 2k1vert, 1:29 AM 3/17/2004]

 

Well I guess I will be the only one to post something slightly negative.

Everything everybody said above is true. I love where my 5th and 6th gear are in the RPM range on the freeway. Even around town the rpms just seem to sit in the sweet spot the entire time. Tons of pull and I love them........ BUT

On the track. Drag strip that is. I am sure that they will be great if I had slicks and wanted to change out my tires everytime I went to the track but I don't and the car is pretty much undrivable. I will have to relearn how to drive this beast. I am only running 400rwhp and 380 rwtrq (nothing like many of the new H&C packages) and it is still very hard to hook at all. The best I could muster at the track the first day down this year (granted I am in Oregon and tracks are green) was a 12.3 with my 335/30 18 CCW wheels and Pilots on the back. I for the life of me could not even get close to my best last year of 11.9 at 120 mph. I expected my trap speeds to go down but did not realize the difference in driving. I ran all day long trying to learn how to drive it and essentially have resigned myself to having to run with et streets or full slick setup.

Sad considering I now probably have a faster 1/4 mile car if I get traction but stop light to stop light anything with AWD will smoke me becuase of my traction issue:-(

 

:iagree: That you have to relearn to drive the car for a stop. I am still learning. And yes I was dissapointed the 1st time I went back to the track after the gear change. I would literally smoke 1st and 2nd out of the hole with 275/40 Nitto drags. But I would not hesitate to change out gears again. The Highway pulls are incredible!! :reddevil and put a big :D on my face. So go for it!!! You won't be dissapointed!!! :cheers:

 

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what type of mileage ya seeing with the 410's? was there a significant drop???
________________________________________ ________________________

I did a long weekend recently....NY to SC, then to TN. The entire trip was a little more than 2,000 miles. Mostly highway with about 100 miles local. Average was 25+ MPG. Average Highway speed was about 75MPH. That's not bad consiering my friends new Caddy gets about the same. :thumbs:

 

Its also my understanding that with 4.10s you will have to have your rev limiter raised to around 6700/6800, so that you will not have to shift into 5th gear at the end of the 1320! :smash: Also, the traction on my Z06 in first and 2nd gear is so bad i have MAJOR WHEEL HOP ISSUES with stock s. car tires.

Also, i do not monitor my gas mileage much but the car does average around 18 to19 miles per gallon between city and highway driving (well better than my Northstar powered 2001 Caddy STS) and when on the highway with cruise control on i know its making at least 23 to 25 miles per gallon or so which is SIMPLY AMAZIN given the performance of the car! :steering: :chevy

 

I guess I would do it again, but it definitely depends on the application you have in mind. It actually has me rethinking future motor mods and worse, switching cars. I had a H/C car with an A4 and 3.42s before and traction issues when the tranny decided to shift made spirited driving challenging, and sometimes slower. (I know you can shift the A4 manually, but only until it goes, which is sooner than later.)

I put 4.10s in my stick car and was researching the SC vs. H/C decision (had a Vortech & sold w/o installing, looking hard at IC Mag now) while I broke them in.

Reached break in this week and been getting on it here and there. With Z rubber, I am really second guessing how much more power can be put to the ground at the lower speeds I enjoy, like the 45 and slower posted corners.

Although blasphemous to mention here of course, seriously thinking about getting an AWD 911 now. (Then I look at the commanding visual presence and community and acceptance the Vette has over the little German car and change my mind and go back to looking at motor mods.) Bottom line though, I'm afraid I'm going to go for best performing car, which may not be a RWD car.

What's the use of a dyno sheet when a WRX is hard to catch?

Course, anything above 80 or so, all bets are off, except with the P car of course.

For now, with stock power, I say definitely worth running 4.10s, especially if you can put in and take out yourself.

 

Hello dvandentop

I also have a ZO6 and had the same dilemma as you with the gear upgrade. You really need to look at where you are going to be taking the car and what conditions/speeds you plan on seeing. Also remember the different gearing in the M12 verses the MN6 transmissions.

I see a lot of people have posted about the 4.10's being the ticket for the street and drag strip which I am sure they are. My concerns were more with taking the car on a road course and the accompanying high speeds. I finally decided to upgrade my 3.42 to a DTE 3.90 w/hardened output shaft. I will also be raising the rev limiter to 6800 (there are some other upgrades occurring with my valve train to allow this).

My favorite local track has a long front straight allowing speeds of about 160 mph. With my 3.90 I will be able to hit 161 mph in 5th gear at 6800 RPM. If I were to have gone with 4.10's then 5th gear at 6800 would have only given me 153 mph.

The install will be done in the next couple weeks and we will see how things go.

If you want, I can email you a great gear-speed excel spreadsheet that I used.

Perry