Whoa!! 4.10's.....
Thread Starter
Intermediate
Joined: Feb 2005
Posts: 43
Likes: 0
Whoa!! 4.10's.....
Vette Doctor just put in 4.10 rear gears in my 99 ragtop. Still doing the break-in, but I would have saved a lot of money if I did this mod first (Vararam, Kooks, cat backs were already done).
The other mods were noticeable and the sound is great, but the 4.10's made it feel like a 75hp gain. And that's not getting over 60mph with no hole shots.
That's what tax returns are for, right??
The other mods were noticeable and the sound is great, but the 4.10's made it feel like a 75hp gain. And that's not getting over 60mph with no hole shots.
That's what tax returns are for, right??
Melting Slicks
Joined: Mar 2000
Posts: 2,975
Likes: 1
From: Northwest Iowa
Originally Posted by Rapidity
What RPM would 80mph be in 6th gear with 4.10s? Anyone know how to figure that out?
4.10s sound sweet.
4.10s sound sweet.
I am guessing it would be around 1800 -1900 RPm though. I usually cruise down the road at 70-75 and run around 1700-1800 rpm in mine.
I have to agree. Best mod that I have ever done to the car and well worth the money
Instructor
Joined: Oct 2005
Posts: 198
Likes: 0
From: Seattle Wa
Originally Posted by Rapidity
What RPM would 80mph be in 6th gear with 4.10s? Anyone know how to figure that out?
4.10s sound sweet.
4.10s sound sweet.
(when the motor was in my car
)
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Instructor
Joined: Oct 2005
Posts: 198
Likes: 0
From: Seattle Wa
Originally Posted by Mitch.Shea
how does this effect your topend? how fast can yougo with these gears?
Melting Slicks
Joined: Nov 2004
Posts: 3,495
Likes: 0
From: Paducah Ky
Originally Posted by blkonblk_c5
I was think of a 3.90 but this makes me wanna go with a 4.10 where or who did you buy yours from?
Le Mans Master
Joined: Dec 2005
Posts: 6,420
Likes: 5
From: "This is not a psychotic episode, but a cleansing moment of clarity."
Originally Posted by usnskeet21
at 80 i turn right at 2k with 4.10s
(when the motor was in my car )
(when the motor was in my car
)
Race Director
Joined: Nov 2001
Posts: 18,682
Likes: 4
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12
If you have a stock car or modded upto 450ish rwhp nothing can beat 4.10s. Period! When you hit 3500 RPMs it feels like you are spraying 100 shot of juice Feeling is just totally unreal.. You wont believe how fast your RPMs will go from 3500 to 6500 with your tires smoking in 1st and 2nd. I currently have 4.10s in my car that I just bought but they are a bit too much for me, even though I love them 
I am going with a different combo and mine should be up for sale as soon as my new combo arrives. If someone looking for some A&A 4.10s (complete differential) for a great price, I will be listing them over on parts for sale section in about a couple weeks. Look out for it
Feeling is just totally unreal.. You wont believe how fast your RPMs will go from 3500 to 6500 with your tires smoking in 1st and 2nd. I currently have 4.10s in my car that I just bought but they are a bit too much for me, even though I love them I am going with a different combo and mine should be up for sale as soon as my new combo arrives. If someone looking for some A&A 4.10s (complete differential) for a great price, I will be listing them over on parts for sale section in about a couple weeks. Look out for it
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Here's a great site to calculate speed or rpm. Pan down and choose your type of car, then calculate away.
http://www.xse.com/leres/ss/calculator.html
http://www.xse.com/leres/ss/calculator.html
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
Likes: 39
From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Originally Posted by HawkIVette
I used to have a link to a site that you could punch in the gear ratio- tire size- MPH and it would tell you the RPM and vice versa. I will look around for it. If I find it I will post, but I have had 4.10's in my '99 FRC for 2 years now and love them.
I am guessing it would be around 1800 -1900 RPm though. I usually cruise down the road at 70-75 and run around 1700-1800 rpm in mine.
I have to agree. Best mod that I have ever done to the car and well worth the money
I am guessing it would be around 1800 -1900 RPm though. I usually cruise down the road at 70-75 and run around 1700-1800 rpm in mine.
I have to agree. Best mod that I have ever done to the car and well worth the money
http://www.f-body.org/gears/
Melting Slicks
Joined: Mar 2000
Posts: 2,975
Likes: 1
From: Northwest Iowa
Originally Posted by EnglandGreen
Thanks Stephen. You are the man. I couldn't for the life of me find that link.
And mdchaser- I bought mine from Dyno-Tech also about 2 years ago. They were running a winter special and the gears (complete core) with core exchange was around $900, I added the hardened output shaft ($300) and had it installed by my local mechanic ($600) Total cost $1800.
My car has been dyno'yed at 345 RWHP and 359 RWT and will run the 1/4 consistantly at 12.3 with a best time at 12.191 @ 114 MPH. Makes the car not only fast ( cause I can still get 150-160 mph out of it on the road course) but very quick on acceleration.
.