3.73 vs 3.90 in A4 car
#1
3.73 vs 3.90 in A4 car
I've searched till my eyes hurt and want some feedback. I want to upgrade my 3.23's and really want the 3.90's. However, they've been on backorder everywhere since last October. I had a set of 4.10's but I really wasn't too keen on going that route so I sold them. I don't think I want 3.73's either as I don't see a big enough gain coming from 3.23's.
3.90's split the difference nicely. What differences would there be between the two. Most of my driving is in town and when I do go on the highway it's usually just for fun. I want the best gear for my PT4400. I take it to the track maybe 3-4 times a year. Is there any reason why one would be better than the other?
On that note, if anyone has 3.90's for sale, I'd be very interested .
3.90's split the difference nicely. What differences would there be between the two. Most of my driving is in town and when I do go on the highway it's usually just for fun. I want the best gear for my PT4400. I take it to the track maybe 3-4 times a year. Is there any reason why one would be better than the other?
On that note, if anyone has 3.90's for sale, I'd be very interested .
#5
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iTrader: (40)
Why not just hold off on the gear swap and save up for a strong 12 bolt.
#7
i pulled harder on the roll races with the 3.73's (1-2 car increase pull)...i used to have 3.23's.. i say go 3.73s bro... i am thinkin of running the same cam u got or MS3 in the future with yank 4000..
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#9
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Join Date: Dec 2001
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Save your money and go with the 4.11 12 bolt.
The 10 bolt may last a while, may not. I currently run a 3.89 in my 9 inch which, for my combo, is just about maxed out. Used to run 3.73 in my 10 bolt and did not see much difference going to 3.89's.(may go back to 3.73's) You have alot more converter and cam and can use the extra gear. Watched your video and your car is on the converter most of third gear.
Don't waste your time with 4.11's in a 10 bolt, put the $500 gear change toward the stronger rear.
My .02 worth.
Dee Jay
The 10 bolt may last a while, may not. I currently run a 3.89 in my 9 inch which, for my combo, is just about maxed out. Used to run 3.73 in my 10 bolt and did not see much difference going to 3.89's.(may go back to 3.73's) You have alot more converter and cam and can use the extra gear. Watched your video and your car is on the converter most of third gear.
Don't waste your time with 4.11's in a 10 bolt, put the $500 gear change toward the stronger rear.
My .02 worth.
Dee Jay
#10
If your first worry is strength of the gear set....definitely just save that money for a 12 bolt in the future. If not, then 4.10's are a viable stand in for the time being. The point is that if you run that 10 bolt with a bunch of power, hard hitting stall, and sticky tires, expect carnage.
#11
What do you mean by that?
Looks like the best advice so far is saving for a 12-bolt. I really wanted gears now, but I agree that the 12-bolt is the best idea. With my luck, 3.90's or 4.10's would not last even one pass. I do run sticky tires, and the PT4400 hits pretty damn hard....so that combination paired with new gears in the 10-bolt sounds like wasted money. Thanks for the feedback.
#13
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iTrader: (34)
What do you mean by that?
Looks like the best advice so far is saving for a 12-bolt. I really wanted gears now, but I agree that the 12-bolt is the best idea. With my luck, 3.90's or 4.10's would not last even one pass. I do run sticky tires, and the PT4400 hits pretty damn hard....so that combination paired with new gears in the 10-bolt sounds like wasted money. Thanks for the feedback.
Looks like the best advice so far is saving for a 12-bolt. I really wanted gears now, but I agree that the 12-bolt is the best idea. With my luck, 3.90's or 4.10's would not last even one pass. I do run sticky tires, and the PT4400 hits pretty damn hard....so that combination paired with new gears in the 10-bolt sounds like wasted money. Thanks for the feedback.
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#14
^^^2-3 shift extension is 5800-5900 RPM's. I will say that I am not using much of 3rd at the track, and the range I do use isn't the ideal range. The heat hasn't been an issue yet with the winter temps, but you bring up a good point. I'll have to keep a close eye on my temps when we get into the hot summer months. I'll just play it by ear. If I can survive through the summer with 3.23's, then hopefully a 12-bolt will be added this fall. If not, then hopefully the 3.90's aren't still on backorder!
#15
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iTrader: (11)
If you dont cruise on the highway often or for very long time go with 390s. Keeping up with traffic with 373s at 70mph gets old, 390s would be even worse. Im not sure where 410s would put 4th gear at, but if you ever did heads down the road it would be pretty close to going into 4th in 1/4. Now staying with 10bolt and doing gears now or 12bolt at pretty much end of racing season...thats tough choice.