swtvictory

I know this has been discussed but I am looking for high end punch as well as low end. I know the 4.10 wins hands down on the low end, but how much does it struggle up top?
Anyone have any experience with this?

VINCE

iTrader: (1)

I have not seen a whole lot of struggling up top, but 3.73's seem to be a better street gear. With my 4.10's I can run with Bikes on the highway with no prob. I usually let off by 140 to 150mph, but 3.73's would make me continue on..

swtvictory

Thanks, these are the kind of answers I am looking for.
So the 4.10's dont start to fade away until around 140? If so, ill go install my 4.10's this week, lol.
If I can verify that they can stay at least even or maybe better than 3.73 from a 30-120-30 roll, ill be happy.
I am sure others would be interested in this as well.

Linear Velocity

iTrader: (1)

4.10's all the way. 4.10's will pull harder than 3.73's way past 140, don't ask how I know either <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Colonel

At 120 MPH with 3.73s you would be turning about 5861 with stock height tires and an M6 in direct (4th.) With an A4 in direct (3rd) you would be turning roughly 6169 considering a converter efficiency of %95.

With 4.10s it would be 6442 with the M6 or 6781 for the A4. Obviously, if your engine can't turn those kind of RPMs then you'll need to shift into OD which REALLY kills acceleration.

Point being, if racing to 120 MPH is your object and your engine doesn't pull to ~6400/6800 then 3.73s would be best.

<small>[ July 25, 2002, 09:15 AM: Message edited by: Colonel ]</small>

Rok

I agree with colonel, if I remember correctly last time my car was dyno'd the guy ran out 4th to the limit which is set to 6300 and it hit about 125

Colonel

If your engine will pull the RPMS (he didn't state his combo) then 4.10s are the way to go. If not then it's 3.73s.

Colonel

BTW, swtvictory, what's your combo? How how can you spin that thing?

swtvictory

Right now I have

6600 RPM's
6 speed with a cam,headers ect ect and heads on the way.
When I get LS1 edit, I will be able to turn 6700 but I dont want to go any higher than that.
I am assuming 4.10's are the best way to go.

<small>[ July 25, 2002, 04:04 PM: Message edited by: swtvictory ]</small>

Linear Velocity

iTrader: (1)

Well I'm talking about an M6, stock tires you will hit 123 @ 6600 rpms with 4.10's. 3.73's are good to 135 but with 4.10's you'll reach 120 faster, which I believe is what your looking for <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Damian

iTrader: (89)

I do a LOT of highway racing, and 4:10 geared LS1's have never impressed me on the highway. They seem to fall out sooner than a 3:73 geared car with similar mods. This is coming from someone who races mostly on the street, from 55+ mph kicks....

Josh

Colonel

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by swtvictory:
<strong>Right now I have

6600 RPM's
6 speed with a cam,headers ect ect and heads on the way.
When I get LS1 edit, I will be able to turn 6700 but I dont want to go any higher than that.
I am assuming 4.10's are the best way to go.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yep, 4.10s in your case if racing to 120 is the goal.

swtvictory

How about what damian said?

When will the 4.10's start to suffer as compared to the 3.73's?

swtvictory

just bringing this up one last time to see if anyone might have any more experience with these gears.
I have 4.10's in the closet but I do race from 30-120 a lot. I just want to know when the 4.10's stop shining as opposed to the 3.73.

I understand that some people think 4.10's are better from 30-120 and some say 3.73 are better from 30-120,
If indeed the 4.10's are better from 30-120, when do they loose their power? is power lost when going into 5th? if so, then 4.10's should start losing around the 120-125 mark "when you have to shift" and 3.73's atart losing 135 mark. Do the 4.10's make up for it? I wonder how much faster 4.10's could get to 135 than 3.73. Do you see what I am saying? it seems as though they almost balace out at around the 135 speed.
help a brother out <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Linear Velocity

iTrader: (1)

Dude, put the 4.10's in the car and go with it. In my experience I don't think races at 130+ mph last too long to make that much a difference. No offense but if you plan on racing at 120+ mph a lot on the street you're a moron, you're endangering you and others around you. Just get a moser 12 bolt with 3.90's, that should put you right between the 2 ratios, are go with a 9 inch and get both ratios and swap them out, either way make up your mind.

swtvictory

okay, To clarify, I have a 12 bolt with 3.73's already and have no complaints.
Most my races last until around 120 or 130 and I am simply looking for what can get me there quicker.
In this thread, it looks as though some think the 4.10's and some think the 3.73.
I just dont want to make a bad decision.

I have a lot of 40 50 60 punch races as well and want to be 100% that 4.10's will get me to 120 quicker. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

swtvictory

last thoughts?

unit213

Everything posted thus far leads you in the direction of 4.10's.

swtvictory

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by camaro_ls1:
<strong>Everything posted thus far leads you in the direction of 4.10's.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">good point, I surely hope I dont make the wrong move on this one. I know my 1/4 will improve, that is not a question, I just dont want to see my 50-120-130 go down as a result.

John B

iTrader: (10)

for your desired MPH range 4.10's are clearly the ticket....the motor will rev quicker giving you a bigger "instant snap" when you first nail it and as pointed out earlier, will get you to 120MPH before you have to shift (assuming that you will be shifting at ~6500RPM).

I can tell you that I have 3.73's with an M6 right now and at the track it sucks....I shift into 4th 200 feet from the lights and it is costing me dearly!

Bottom line, you know what you have to do.....you just need to do it!