Need your input 3.42 gears
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 17
Likes: 0
Need your input 3.42 gears
New to the forum, so hello. Need to get some info from you guys that no this stuff.
I have a 02 coupe a4 with 2.73 gear. Mods are stage 4 cam from Thunder Racing ( lovin it) 3200-3400 stall converter long tube LG super pro headers and x pipe into Borla stinger. As of this time I'm at 420rwhp. What do you guys think a 3.42 gear will do for me. A lot of my play are rollons between 40 and 70. I know it will make for a tire frying bottom end, but what will it do to or for my 70 mph roll ons. Also I'm running about 1600 rpms at 70 and getting about 25 mpg on highway but maybe 17 or 18 mpg city. Thanks for any info
I have a 02 coupe a4 with 2.73 gear. Mods are stage 4 cam from Thunder Racing ( lovin it) 3200-3400 stall converter long tube LG super pro headers and x pipe into Borla stinger. As of this time I'm at 420rwhp. What do you guys think a 3.42 gear will do for me. A lot of my play are rollons between 40 and 70. I know it will make for a tire frying bottom end, but what will it do to or for my 70 mph roll ons. Also I'm running about 1600 rpms at 70 and getting about 25 mpg on highway but maybe 17 or 18 mpg city. Thanks for any info
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
New to the forum, so hello. Need to get some info from you guys that no this stuff.
I have a 02 coupe a4 with 2.73 gear. Mods are stage 4 cam from Thunder Racing ( lovin it) 3200-3400 stall converter long tube LG super pro headers and x pipe into Borla stinger. As of this time I'm at 420rwhp. What do you guys think a 3.42 gear will do for me. A lot of my play are rollons between 40 and 70. I know it will make for a tire frying bottom end, but what will it do to or for my 70 mph roll ons. Also I'm running about 1600 rpms at 70 and getting about 25 mpg on highway but maybe 17 or 18 mpg city. Thanks for any info
I have a 02 coupe a4 with 2.73 gear. Mods are stage 4 cam from Thunder Racing ( lovin it) 3200-3400 stall converter long tube LG super pro headers and x pipe into Borla stinger. As of this time I'm at 420rwhp. What do you guys think a 3.42 gear will do for me. A lot of my play are rollons between 40 and 70. I know it will make for a tire frying bottom end, but what will it do to or for my 70 mph roll ons. Also I'm running about 1600 rpms at 70 and getting about 25 mpg on highway but maybe 17 or 18 mpg city. Thanks for any info
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 17
Likes: 0
Thanks for the replies guys. Sometimes you just need to hear it from people who have similar cars. Also I may be a new member to the forum but I'm not new to reading this forum. I've noticed that most of you know what your talking about and help others. Again thanks.
While I'm here though does anyone know about what RPM I may be running at 70 after the change?
While I'm here though does anyone know about what RPM I may be running at 70 after the change?
Le Mans Master
Joined: Mar 1999
Posts: 6,029
Likes: 85
From: Palm Coast, FL
New to the forum, so hello. Need to get some info from you guys that no this stuff.
I have a 02 coupe a4 with 2.73 gear. Mods are stage 4 cam from Thunder Racing ( lovin it) 3200-3400 stall converter long tube LG super pro headers and x pipe into Borla stinger. As of this time I'm at 420rwhp. What do you guys think a 3.42 gear will do for me. A lot of my play are rollons between 40 and 70. I know it will make for a tire frying bottom end, but what will it do to or for my 70 mph roll ons. Also I'm running about 1600 rpms at 70 and getting about 25 mpg on highway but maybe 17 or 18 mpg city. Thanks for any info
I have a 02 coupe a4 with 2.73 gear. Mods are stage 4 cam from Thunder Racing ( lovin it) 3200-3400 stall converter long tube LG super pro headers and x pipe into Borla stinger. As of this time I'm at 420rwhp. What do you guys think a 3.42 gear will do for me. A lot of my play are rollons between 40 and 70. I know it will make for a tire frying bottom end, but what will it do to or for my 70 mph roll ons. Also I'm running about 1600 rpms at 70 and getting about 25 mpg on highway but maybe 17 or 18 mpg city. Thanks for any info
I think you will feel a good "seat of the pants" pull with the 3:42 but take it to the track and get some seat time and find out what it will actually run.
Paper racing can go on and on for a long time and you'll never really know what it will run.
By the way how are you at 420 hp? What heads and intake/throttle body etc. are you running?
Last edited by Rob Petyo; Sep 6, 2012 at 10:41 PM.
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 17
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Hot_wheels
Man believe it or not but stock heads car already has ls6 intake, added dual cone air intake, unrestricted exhaust and cam. I was really Pleasantly surprised to see those numbers too, but I likem
Man believe it or not but stock heads car already has ls6 intake, added dual cone air intake, unrestricted exhaust and cam. I was really Pleasantly surprised to see those numbers too, but I likem
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Team Owner
Joined: May 2003
Posts: 23,480
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From: East Meadow NY
St. Jude Donor '12
Thread Starter
Heel & Toe
Joined: Aug 2012
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It already has a 3200 stall. But as it is when I'm next to a c5 z06 ( 60-70 mph roll) with less hp, it always gets a small jump and I have to run it down. Just wanted to know if 3.42s would start giving me the jump since I have more hp
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
The extra gear will get the engine spinning faster and provide extra torque multiplication, so you should have a good improvement.I mentioned the converter because a stock converter will hold back the engine on downshifts while a high stall will allow it to spin up more easily.
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 17
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The extra gear will get the engine spinning faster and provide extra torque multiplication, so you should have a good improvement.I mentioned the converter because a stock converter will hold back the engine on downshifts while a high stall will allow it to spin up more easily.
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 17
Likes: 0
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
You should be very happy. Before I bought my Vette, I test drove a convertible w/2.73 and the car felt anemic off of the line. It felt more like a highway cruiser than anything else. The 3.15 car feels a lot stronger off the line and from a roll especially if you've had a tune to alter the shift firmness and speed. I am up to 3.42 now and it is a small improvement over 3.15, but it will feel like a huge difference compared to a 2.73 car.
Last edited by chaase; Sep 11, 2012 at 03:48 PM.
AMP Racing
Joined: Aug 2006
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From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
At 70 mph with a stock size rear tire, my engine was at 2100 rpm with a 3.42 rear and 4l60 trans.
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 17
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AMP Racing
Joined: Aug 2006
Posts: 10,755
Likes: 589
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
I have no idea what the HP is/was 
My 6 speed vette (MM6) was about 1500RPM at 70 mph - if I remember correctly.
OD in the 4L60, MM6, and M12 are all different.
My 6 speed vette (MM6) was about 1500RPM at 70 mph - if I remember correctly.
OD in the 4L60, MM6, and M12 are all different.