4.10 gear thoughts?
Drifting
Joined: Mar 2005
Posts: 1,737
Likes: 0
From: Northern VA
I am curious, where did you get the 27mpg from, your DIC reading? Because it is calibrated (and someone correct me if I am wrong) to your stock gears, unless there is some way to adjust the computer to account for 410 gears. When I went to cruise-inn this year, I manually calculated my MPG by the number of miles driven, by how many gallons of gas I used.. my DIC said I was getting 28mpg , by my calculations I was really getting 25.6 MPG (with 390 gears btw).
?????
?????
My experience showed ~2mpg difference between 3.42 and 4.10. Mileage often suffers heavily when a go fast mod is added for obvious reasons. I'm sure this small difference is due to the fact that you are now using 6th gear instead of 5th.
4.10's are the way to go on stock or big cam cars IMHO.
Burning Brakes
Joined: Aug 2004
Posts: 837
Likes: 2
From: Derry NH
Calculated MPG by hand. Over almost 4000 miles so I feel I am pretty accurate.
Best mileage was in Penn from State College to Allentown. Worst was from Pittsburgh to State College
Dang mountains...
26.8 total I think, have it written in my 'trip paperwork' somewhere. Also, mileage was better when I drove, the lady liked to pass and I liked to use cruise control.
Best mileage was in Penn from State College to Allentown. Worst was from Pittsburgh to State College
Dang mountains...26.8 total I think, have it written in my 'trip paperwork' somewhere. Also, mileage was better when I drove, the lady liked to pass and I liked to use cruise control.
Racer
Joined: Nov 2005
Posts: 404
Likes: 0
From: KY
Anybody that says 4.10s will have you turning high rpms and will kill your gas mileage is either crazy or doesn't have enough experience with them.
Sixth gear will turn 2100 rpms at 75 mph all day long and if your car is close to stock or lightly modded it will still easily get 26-27 mpg. This can be confirmed by hundreds of people including myself(hand checked).
Sixth gear will turn 2100 rpms at 75 mph all day long and if your car is close to stock or lightly modded it will still easily get 26-27 mpg. This can be confirmed by hundreds of people including myself(hand checked).
Race Director
Joined: Jun 2004
Posts: 19,459
Likes: 48
From: Schaumburg IL
CI 7-8-9-11 Veteran
St. Jude Donor '06-'10, '13
Has nothing to do with gearing, it's based on injector flow rate and % of on time. Everyone knows this calculation is a little optimistic, but it is useful for comparison purposes.
My experience showed ~2mpg difference between 3.42 and 4.10. Mileage often suffers heavily when a go fast mod is added for obvious reasons. I'm sure this small difference is due to the fact that you are now using 6th gear instead of 5th.
4.10's are the way to go on stock or big cam cars IMHO.
My experience showed ~2mpg difference between 3.42 and 4.10. Mileage often suffers heavily when a go fast mod is added for obvious reasons. I'm sure this small difference is due to the fact that you are now using 6th gear instead of 5th.
4.10's are the way to go on stock or big cam cars IMHO.
Burning Brakes
Joined: Feb 2004
Posts: 1,231
Likes: 0
From: edmonton ab
That is sort of my thought. Good rubber on good pavement with a skilled launch and the 4.10s are killer. If any of these things aren't there you risk lighting them up and being the victim of the kill. My 02 Viper with fresh 335s actually bit pretty good so I know the torque can be dealt with, but my cammed LT4 is kind of particular when it will give me full value for the gears. I had a stock 03 Z before the Viper and it launched better than either the Viper or the LT4 so I am really partial to stock gears with street rubber. With enough practice and skill I am sure the OP will be able to launch well on a 4.10 set with good rubber. But I never quite worked on it enough to get the optimum launch which is why I kind of lean towards the more forgiving 3.73s
Melting Slicks
Joined: Jan 2004
Posts: 3,012
Likes: 15
From: Jensen Beach FL
Anybody that says 4.10s will have you turning high rpms and will kill your gas mileage is either crazy or doesn't have enough experience with them.
Sixth gear will turn 2100 rpms at 75 mph all day long and if your car is close to stock or lightly modded it will still easily get 26-27 mpg. This can be confirmed by hundreds of people including myself(hand checked).
Sixth gear will turn 2100 rpms at 75 mph all day long and if your car is close to stock or lightly modded it will still easily get 26-27 mpg. This can be confirmed by hundreds of people including myself(hand checked).
