4.10s with A4
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From: Seattle,Wa.
4.10s with A4 Is there anyone running 4.10s with their A4, if so how do you like them?
I had Shaun put in some 3.73s last week and they wine real bad. Shaun said it was a bad gear set. I ran the 3.73s at the track yesterday and picked up a tenth. Could I pick up another tenth with 4.10s is the quesrtion. The new gear(3.73) doesn't rev all that high on the interstate so I'm thinking 4.10.
Input is appreciated.
I had Shaun put in some 3.73s last week and they wine real bad. Shaun said it was a bad gear set. I ran the 3.73s at the track yesterday and picked up a tenth. Could I pick up another tenth with 4.10s is the quesrtion. The new gear(3.73) doesn't rev all that high on the interstate so I'm thinking 4.10.
Input is appreciated.
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From: Kent WA
If you're just interested in drag racing, 4.10s might be ok in your car... but IMHO, if I had an A4 that I cruise around town with mostly, I wouldn't do the 4.10s unless I had an extended powerband. Meaning that if my car needed to shift around 6500 rpms or so due to a higher revving setup (cam, heads, etc), then I'd do 4.10s.
Your best bet now is to get yourself a good converter... 3600 stall along with those 3.73s would be an *** kicker.
Your best bet now is to get yourself a good converter... 3600 stall along with those 3.73s would be an *** kicker.
I use to have 4.10's with my A4 for 3 years and absolutely loved it. I now have a A3, but that is another story. If I remember correctly with my A4 70 mph = 3300 to 3400 rpm. My wife also drove the car around town alot and she said that she enjoyed them to. I too went to the 3.73's first and ran them until they broke. I really didn't notice that much of a difference on the street from the 3.73's from the 3.42's that I had at first. I did notice a huge difference in the way the car reacted from the lights when I put the 4.10's in. That is just my opinion.
Joined: Nov 2001
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From: LT1 land...the "409" of the 90s!
For low Power cars you can get away with it. Once you start hitting the big numbers where you would Trip the trapps past your Red line RPM you need to move down 
Top fuel cars are limited to 3.20s they were getting ready to go to 3.00s When NHRA stepped in!
I am running 3.73s and have thought of stepping back down to 3.4xs to stay under my Redline when running N2O
Top fuel cars are limited to 3.20s
they were getting ready to go to 3.00s When NHRA stepped in!I am running 3.73s and have thought of stepping back down to 3.4xs to stay under my Redline when running N2O
My buddy has an electric blue 03 cobra and one night we were out cruising in it and came accross an 02' SS A4 with 4:10's (nice freakin car). The cobra and Camaro went from a dig (driver and passenger in both vehicles) and the Camaro pulled pretty good until 3rd where the race was about even. Those gear really made that Camaro pull from a dig hard!!!
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From: Seattle,Wa.
Ellis, so are you telling me that I can get away with it? I presume that's what you mean.
I run the car @ Monroe and I noticed that the car shifted in to 3rd. gear about 3/4 of the way down the track. I think I need to hit 3rd. sooner. I'm barely in to 3rd. when I'm trapping. With 4.10s I could get deeper in to 3rd.
If you were me, what gear would you pick 3.73 or 4.10.
With the 3.73s I was at 2500rpm @ 70 mph. I don't see the 4.10s being over 3000rpm @ 70 mph. which would be liveable for highway driving.
Thanks for the responces everyone. I think I want 4.10s Unless Ellis talks me out of it.
I run the car @ Monroe and I noticed that the car shifted in to 3rd. gear about 3/4 of the way down the track. I think I need to hit 3rd. sooner. I'm barely in to 3rd. when I'm trapping. With 4.10s I could get deeper in to 3rd.
If you were me, what gear would you pick 3.73 or 4.10.
With the 3.73s I was at 2500rpm @ 70 mph. I don't see the 4.10s being over 3000rpm @ 70 mph. which would be liveable for highway driving.
Thanks for the responces everyone. I think I want 4.10s
Unless Ellis talks me out of it. I have one of those "low powered cars" Ellis is talking about & I like them. I go thru the traps at 6k (1/4 mile) so in my opinion they are perfect with 26" tires. I picked up about 3/10ths with them over the 3.23s (again in the 1/4). But then my stall only netted me 2 more 10ths. My car shifts @ 6700 & drops down to 4500, so it stays in it's power band. It shifts into 3rd around 78mph. They do kill the highway driving tho. I run 2500rpm on I-5.
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i wouldn't do it. if you stay with a 26" tire, you'll run out of gear on a good runing heads/cam car in the quarter. another disadvantage is that 4.10 gear sets aren't as strong as 3.73's. a full bolt on car with 3.73's and a 3600+ stall should run mid 12's all day long.
So Eddie, if you add all this up you get a clear path, even tho it seems like conflicting info. If you don't plan to add nitrous, or boost, want to mostly run the 1/8th, don't have a nice set of heads or a stroker in your near future, then deeper gears might work out for you.
If however any of the above is in your plans, then most likely not. I trap around 113, Tranzor around 114. My car shifts into 4th at 120. So when I add heads, I will either have to go with 28" tires, or a taller gear. (sardog & ryan trap around 125 with more power) You do NOT want to shift into 4th in an A4. But again, that is a 1/4 mile thing.
On the other hand, the collective feels for the 1/4 mile 3.73s are the gear to run with an automatic. I can send you an Excel spreadsheet that will tell you where your rpms & such will be with this gear & that tire size in each gear. PM me so I remember when I get home.
If however any of the above is in your plans, then most likely not. I trap around 113, Tranzor around 114. My car shifts into 4th at 120. So when I add heads, I will either have to go with 28" tires, or a taller gear. (sardog & ryan trap around 125 with more power) You do NOT want to shift into 4th in an A4. But again, that is a 1/4 mile thing.
On the other hand, the collective feels for the 1/4 mile 3.73s are the gear to run with an automatic. I can send you an Excel spreadsheet that will tell you where your rpms & such will be with this gear & that tire size in each gear. PM me so I remember when I get home.
FormerVendor
Joined: May 2004
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From: Portland Oregon
A friend of mine running an older C4 with a super rammed 383, LPE 219 cam runs a 700R4 with a Precision Industries 5 disk lock up convertor with 3.07 gears runs 11.50s. His stall convertor if I remember right is below 3000, he is running ET street 315 drag radials. Another friend with an 89 C4 with a 440 inch mini-rammed small block is running 3.73s with a M6, he runs mid 10s.
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From: Kent WA
Originally Posted by WAHUSKER
If however any of the above is in your plans, then most likely not. I trap around 113, Tranzor around 114. My car shifts into 4th at 120. So when I add heads, I will either have to go with 28" tires, or a taller gear. (sardog & ryan trap around 125 with more power)
Getting to scout my car from the outside was nice, because I actually saw that I could use MORE gear... there's that dead spot about 30' out of the hole that needs to be addressed, since even a 7k clutch dump didn't solve it. I'm thinking 4.30s would solve that just fine...
I'm not too worried about adding heads, because I won't be hitting over 120 or so even with heads, and even then that's only around 6600 rpms... getting close to my ceiling, but still with a couple hundred rpms to play with at the end. 4.30s should be about perfect.
With heads on your car Mark, I think your 4.11s will be about perfect as well if the math is correct. With a 26" tire on an A4, you're looking at 120 mph being 6400 rpms in 3rd gear, which ain't bad. Yours is shifting at 6700 or so anyways, right? That's 126mph according to the gear calculator with 4.11s in an A4.
I'm not sure if Ryan had the 4:11s in when he ran the 9, or if he had already changed over to the 3:73s. I think you are right Boyce, it was the 3:73s. With the 414 & spray.
There are many different theories about what gear works best with what setup. Like Ellis said, the big boys run VERY tall gear ratios, and then only have 1 or 2 gears in the trannys. The Pro & Super Stockers tend to run deep gears, like 4:88 to 5:86, some even go with 6:13s, and then run close ratio 4-6 sp trannies to keep in their optimum power band & cross the traps @ red line.
That is more the direction I'm headed. Thinking that LS1s make more HP than TQ, so I want to keep the rpms up. Unless you have a car like Ryans with a turbo or spray or a stroker that produces more bottom end, I think it's the way to go. But like I said, others do it their way & it works for their package.
And you are correct Jason, it shifts at 125 into 4th. I should be good to go....
There are many different theories about what gear works best with what setup. Like Ellis said, the big boys run VERY tall gear ratios, and then only have 1 or 2 gears in the trannys. The Pro & Super Stockers tend to run deep gears, like 4:88 to 5:86, some even go with 6:13s, and then run close ratio 4-6 sp trannies to keep in their optimum power band & cross the traps @ red line.
That is more the direction I'm headed. Thinking that LS1s make more HP than TQ, so I want to keep the rpms up. Unless you have a car like Ryans with a turbo or spray or a stroker that produces more bottom end, I think it's the way to go. But like I said, others do it their way & it works for their package.
And you are correct Jason, it shifts at 125 into 4th. I should be good to go....
For me, its all about where the gears put you when you cross the traps. 4:10's will wouldn't work in my car for the power band that I run. I spin the Turbo car up to 6100-6200 rpm Max.
So, the determination comes down to:
What kind of driving/racing YOU do.
and
Where is YOUR powerband.
If you can live with the daily reprocussions of changing the gears for your racing time and you answer the above questions and they point to 4.10's then go for it.
The 9.91 @ 136 was run on a 27" tire and 3.70 gears.
Ryan
So, the determination comes down to:
What kind of driving/racing YOU do.
and
Where is YOUR powerband.
If you can live with the daily reprocussions of changing the gears for your racing time and you answer the above questions and they point to 4.10's then go for it.
The 9.91 @ 136 was run on a 27" tire and 3.70 gears.
Ryan
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From: Seattle,Wa.
Thank you for all of your information, you have enabled me to make a decision. Understanding rpms while trapping makes sense. Right now I'm trapping at about 4700rpm, with the 4.10 I would still be in 3rd gear @ Monroe and probably be close to 6000 rpm. If I run out of gear I can always go to a 26 or taller tire to compensate.
Now I need to call Shaun and tell him the good news.
Thanks again.
Eddie Much
Now I need to call Shaun and tell him the good news.
Thanks again.
Eddie Much