newbie? 3.90 gears
#3
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Originally Posted by HioSSilver
3.90's are great. Gear of choice really and I've had them both. 4.10 is a bit much for these cars.
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#6
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I do digs. The 3.90 don't hurt that any, actually may stay hooked up a little better. I've had my best 60 with the 3.90's also. The 3.90 is also the stronger gear.
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Originally Posted by HioSSilver
Quote:
Originally Posted by Sumbalt1
i was woundering because i do alot of freeway driven and this is my daily driver...
It's not a issue of rpm. It's that you just blow threw your tq and all you do is shift. The car accelerates better with the 3.90
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Originally Posted by LS1T56FTW
Do you do digs fairly often? I am currently in process of installing 4.10s since my car with 3.42s cannot get out of the hole to save its life.
I do digs. The 3.90 don't hurt that any, actually may stay hooked up a little better. I've had my best 60 with the 3.90's also. The 3.90 is also the stronger gear.
Originally Posted by Sumbalt1
i was woundering because i do alot of freeway driven and this is my daily driver...
It's not a issue of rpm. It's that you just blow threw your tq and all you do is shift. The car accelerates better with the 3.90
Quote:
Originally Posted by LS1T56FTW
Do you do digs fairly often? I am currently in process of installing 4.10s since my car with 3.42s cannot get out of the hole to save its life.
I do digs. The 3.90 don't hurt that any, actually may stay hooked up a little better. I've had my best 60 with the 3.90's also. The 3.90 is also the stronger gear.
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#8
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I am not worried about strength by any means, I will end up running a strong rear eventually, it just the ratio I am unsure of. Once I run the 4.10s I will see if I like them or not from a shifting standpoint (car should be rolling tomorrow), but for the track 4.10s are matched perfectly with where my RPMs will be in 4th gear, so I am thinking that I will stay with them since I am personally having some serious issues cutting good 60s (and it is not due to traction - you can always fix that with tires/suspension, it is due to the car bogging very hard).
#9
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Quote:i done a couple digs and the 4.10s hook make who ever in the car head snapback...i would keep them but my rpm are high on the freeway
2k@70 is too high? 4.10 with .50 overdrive = 2.10 overall final drive ratio. Changing from 4.10s to 3.90 doesn't seem cost effective. Except for traction in first, 4.10s work great especially with a cam.
2k@70 is too high? 4.10 with .50 overdrive = 2.10 overall final drive ratio. Changing from 4.10s to 3.90 doesn't seem cost effective. Except for traction in first, 4.10s work great especially with a cam.
#10
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It's cost effective if you can't get threw the qtr w/o hitting the limiter in 4th. Also cost effective in the 3.90's hold up better and accelerate harder. I went from breaking ring gears with 4.10 to breaking axles with 3.90's.
#13
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I would think your gonna hit the limiter with that much power, or at least be past your power peak.
#14
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We will see. I definitely got right around 120 out of 4th gear last night before my shift light came on (have it set at 6400) so the gear calculators I have been using are correct. I think I will be OK with the 4.10 gears.
On another note, I am very happy with the gears. 3.42->4.10 is quite a jump. Car launches much better now.
On another note, I am very happy with the gears. 3.42->4.10 is quite a jump. Car launches much better now.
#15
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Well good luck with them. I was all right for a while with them to. But as I refined my car it got faster and I maxed out the gear for my rpm. In the end if you keep you engine in it's sweet spot it will accelerate harder and longer. That's what 3.90's offered. I actually think 3.73's would not hurt my car much. If your trying to get threw the qtr and winding your motor to hang on to the gear then you have the wrong gear.
#17
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Well good luck with them. I was all right for a while with them to. But as I refined my car it got faster and I maxed out the gear for my rpm. In the end if you keep you engine in it's sweet spot it will accelerate harder and longer. That's what 3.90's offered. I actually think 3.73's would not hurt my car much. If your trying to get threw the qtr and winding your motor to hang on to the gear then you have the wrong gear.
With my 4.10s, my 26" M/T's, I can get 130 out of 4th (6900RPM) before I would be getting out of my powerband at all. My car makes 470whp from 6000RPM to 6900RPM, so I don't think running out of RPM will be a problem any time soon. Not just that I will be adding a FAST to my setup eventually - should rev even higher theoretically. I will probably run 4.10s once I get a strong rear and just run a taller tire if I need "more gear."
With that said, if I am having trouble running out of gear (trapping 130+) I will have no problem switching to 3.90s, haha.
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Too much shifting for me, 3.90 is pushing it, but I like it.
4.10 first gear is useless, unless you just like blowing the tires off all the time.
If you ever get a chance to drive a car with a 3.90 gear you will like it.
But you are right about 3.73, they were better than the 3.42 but still a little to tall. Some say you cant tell the difference blah blah...bull ****. I can tell the difference, 3.42 to 3.73, to 3.90, to 4.10...3.90 is the best.
Pluss the 3.90 Motive is a strong gear with a bigger pinion, than the 4.10.
#20
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Granted this is all with stock size street tires....
Too much shifting for me, 3.90 is pushing it, but I like it.
4.10 first gear is useless, unless you just like blowing the tires off all the time.
If you ever get a chance to drive a car with a 3.90 gear you will like it.
But you are right about 3.73, they were better than the 3.42 but still a little to tall. Some say you cant tell the difference blah blah...bull ****. I can tell the difference, 3.42 to 3.73, to 3.90, to 4.10...3.90 is the best.
Pluss the 3.90 Motive is a strong gear with a bigger pinion, than the 4.10.
Too much shifting for me, 3.90 is pushing it, but I like it.
4.10 first gear is useless, unless you just like blowing the tires off all the time.
If you ever get a chance to drive a car with a 3.90 gear you will like it.
But you are right about 3.73, they were better than the 3.42 but still a little to tall. Some say you cant tell the difference blah blah...bull ****. I can tell the difference, 3.42 to 3.73, to 3.90, to 4.10...3.90 is the best.
Pluss the 3.90 Motive is a strong gear with a bigger pinion, than the 4.10.
Anyway I totally stole the OP's thread, but this definitely helped clarify some things.