410 rear
Thread Starter
Racer
Joined: Mar 2003
Posts: 457
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From: albany ny
410 rear
I am about to have 410' s installed in my 99 frc. I just wanted some opinions on this, with the mods I have would this make traction a real problem with 315 DR at the track. And how about on the street with 295 OEM ZO6 tires. I was also wondering what kind of Et I could expect, i have not ran the car at all with the new h/c. will the 410 be alot better then the 342? If so how much. I know driver has alot to do with it. Thanks, John :steering:
Instructor
Joined: Feb 2003
Posts: 188
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Re: 410 rear (ITSovr4U)
For any given speed in a gear, you'll turn 19.9% higher rpm's.
The rev-limit speeds in the gears will be reduced to 83.4% of the current rev-limit speeds. :cheers:
EDIT: These percentages are with the assumption that you are using the same diameter tire before and after.
3.42/4.1 = 83.4%
4.1/3.42 = 19.9%
[Modified by Mr. Pepsi, 9:47 AM 4/6/2003]
The rev-limit speeds in the gears will be reduced to 83.4% of the current rev-limit speeds. :cheers:
EDIT: These percentages are with the assumption that you are using the same diameter tire before and after.
3.42/4.1 = 83.4%
4.1/3.42 = 19.9%
[Modified by Mr. Pepsi, 9:47 AM 4/6/2003]
Team Owner
Joined: Feb 2000
Posts: 32,545
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From: Lithia FL
Cruise-In II & IV Veteran
CI VI Drag Champ!
Re: 410 rear (ITSovr4U)
4.10 will not necessarily cause traction problems at the track with your 315 drag radial. Most drivers with 4.10 will us a Mickey Thompson ET Street bias ply tire rather than drag radial for traction.
You will pick up some ET. You really should try to get out to the track before changing so that you can baseline it. I don't have mine in long enough (A4) to be able to tell you what my gain has been.
On the street, just keep in mind you have the bigger gear and will want to be more aware of what you are doing when you mash the peddle with you street tires.
You will pick up some ET. You really should try to get out to the track before changing so that you can baseline it. I don't have mine in long enough (A4) to be able to tell you what my gain has been.
On the street, just keep in mind you have the bigger gear and will want to be more aware of what you are doing when you mash the peddle with you street tires.
Melting Slicks
Joined: Sep 1999
Posts: 3,292
Likes: 0
From: Round Rock, Texas Texas
I have a 99 FRC with Heads/ cam etc and the 4:10 rear.
I'm also running stock Z06 rims and tires.
You can definately smoke 'em from a standing start very easily as well as from a roll in 2nd.
That said I'm very pleased and I wish I had done the gear swap sooner.
I'm also running stock Z06 rims and tires.
You can definately smoke 'em from a standing start very easily as well as from a roll in 2nd.
That said I'm very pleased and I wish I had done the gear swap sooner.
Thread Starter
Racer
Joined: Mar 2003
Posts: 457
Likes: 0
From: albany ny
Re: (Scott97)
Thanks Scott , We are putting down just about the same hp and tq. Would really like to see your new times with the gears. What tires did you run the 11.7 on. and what tires will you be using this time. John :hurray: :steering:
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Live Free or Die
Joined: Apr 2000
Posts: 7,943
Likes: 27
From: One thing is for sure this kind of discourse and BS would not be tolerated on the NCRS forum. Ohio
Re: 410 rear (REDGAR)
I have the 4.10s and drive my car every day. I think they are the perfect gear for the 6 speed.
I don't know if I would feel the same with an auto.
3.90 or even 3.73 might be a little easier to deal with on a daily basis with an auto.
:cheers:
I don't know if I would feel the same with an auto.
3.90 or even 3.73 might be a little easier to deal with on a daily basis with an auto.
:cheers:
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Re: 410 rear (ITSovr4U)
Duntov-097 What kind of dyno #'s do you have to get such agood ET's. Thanks, John :steering:
There are Stock 2002 Z06 (360 rwhp)Pulling deep into the 11's on Drag radial only...
With 4.10's on a say 340 rwhp you should be able to do the same... HP for HP the 4.10's pull harder on an MN6 than every gear in a Stock Z06 tranny. :smash:
Live Free or Die
Joined: Apr 2000
Posts: 7,943
Likes: 27
From: One thing is for sure this kind of discourse and BS would not be tolerated on the NCRS forum. Ohio
Re: 410 rear (ITSovr4U)
Duntov-097 What kind of dyno #'s do you have to get such agood ET's. Thanks, John :steering:
Instructor
Joined: Jun 2002
Posts: 228
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From: Riverside CA
Re: 410 rear (Duntov-097)
Thanks guys. That is exactly the information that I needed to solidify my decision to go with the 4.10's. I wasn't sure if the 4.10 would be too much, but it seems to be the perfect gear for the MN6. :yesnod:
Drifting
Joined: Apr 2001
Posts: 1,763
Likes: 24
From: Austin TX
Re: 410 rear (chuckster)
With 4.10's on a say 340 rwhp you should be able to do the same... HP for HP the 4.10's pull harder on an MN6 than every gear in a Stock Z06 tranny. :smash:
Eric
Instructor
Joined: Jun 2002
Posts: 228
Likes: 0
From: Riverside CA
Re: 410 rear (66ImpalaLT1)
Actually, that's not necessarily true. A higher gear will help you accelerate quicker based on the gearing ratio (to a point of course). The more horsepower you have the quicker the engine will turn the gears resulting in a quicker acceleration. It's almost a type of cheating, in a way I guess.
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Re: 410 rear (66ImpalaLT1)
With 4.10's on a say 340 rwhp you should be able to do the same... HP for HP the 4.10's pull harder on an MN6 than every gear in a Stock Z06 tranny. :smash:
I have heard you say this a number of times. Gears dont magically multiply horsepower, they help you make it more usable by keeping you at higher rpms. Thats just my personal opinion, so why dont you take your car out and prove me wrong. ;)
Eric
I have heard you say this a number of times. Gears dont magically multiply horsepower, they help you make it more usable by keeping you at higher rpms. Thats just my personal opinion, so why dont you take your car out and prove me wrong. ;)
Eric
On my MN6 I turn 500rpm faster across the rpm band. Turning 500 rpms faster only gives a very marginal hp gain. But with the torque multiplier it equates to about 70hp. My 4.10's can be felt at 2000 rpm. And it is a huge difference.