Anyone running a 3.73 lsd?

[fresh_TD]

Btw, anyone selling a 3.73?

Sent from my Samsung Note 4

[fresh_TD]

This is something I'd really like to test. I know that with a 4.1 my car averaged near 27, and with the 4.45, it's much more like 24. I would wonder where the point of diminishing returns might lie with respect to lower numeric ratios and economy, and what too low actually may be.

I'm not chasing fuel economy..just lower rpms on the hwy

Sent from my Samsung Note 4

[roguetoaster]

You won't really see an improvement in fuel consumption over the 4.10, at least not in my experience.

This is something I'd really like to test. I know that with a 4.1 my car averaged near 27, and with the 4.45, it's much more like 24. I would wonder where the point of diminishing returns might lie with respect to lower numeric ratios and economy, and what too low actually may be.

[gearheadE30]

I have a 3.73 in mine, and with the turbo it's really good. It also has been about right for all the tracks I've had it on, though I wish 2nd and 3rd were a little closer together. For the autocrosses in my area, I actually wish it was a little longer since I find the limiter more often than I would like. On the street, it's fine. You won't really see an improvement in fuel consumption over the 4.10, at least not in my experience.

[roguetoaster]

Haha..This would not be ideal for a daily, and I daily mine.

Sent from my Samsung Note 4

As do I, at least 3 days a week for 12 minutes each way, 12 glorious tach'd out minutes.

[fresh_TD]

Then let me introduce you to my friend 4.45...

Despite the high RPM cruising it's a super fun final around town and through stoplights/cones. Then again, I was looking for a 3.73 when I ended up buying the 4.45.

Haha..This would not be ideal for a daily, and I daily mine.

Sent from my Samsung Note 4

[roguetoaster]

I don't like the 4.10 on the hwy..I'm at about 3800 @80mph..it blows haha

Sent from my Samsung Note 4

Then let me introduce you to my friend 4.45...

Despite the high RPM cruising it's a super fun final around town and through stoplights/cones. Then again, I was looking for a 3.73 when I ended up buying the 4.45.

[fresh_TD]

I currently have a 3.73 medium LSD in the car, but just temporarily as I rebuild my 3.91 small case. I don't notice all that much difference, honestly. Slightly lower revs. But it does weigh 20lbs more than the small case, FWIW.

4.10 must scream on the highway, because my 3.91 is up there. Or maybe I just drive fast :)

I don't like the 4.10 on the hwy..I'm at about 3800 @80mph..it blows haha

Sent from my Samsung Note 4

[fresh_TD]

I have a 3.73 too. Perfect ratio for the M42 on the highway IMHO. The car honestly doesn't feel any slower...but a stock M42 with almost 300K miles isn't the quickest car around.

I'm also doing the M20 FW conversion, that should help when I throw in the 3.73lsd

Sent from my Samsung Note 4

[DesktopDave]

I have a 3.73 too. Perfect ratio for the M42 on the highway IMHO. The car honestly doesn't feel any slower...but a stock M42 with almost 300K miles isn't the quickest car around.

[irish44j]

I currently have a 3.73 medium LSD in the car, but just temporarily as I rebuild my 3.91 small case. I don't notice all that much difference, honestly. Slightly lower revs. But it does weigh 20lbs more than the small case, FWIW.

4.10 must scream on the highway, because my 3.91 is up there. Or maybe I just drive fast :)

[fresh_TD]

I plan on boosting down the road..so 3.73 is what I'll go with

Sent from my Samsung Note 4

[varg]

I wanted a 3.73lsd for my car but had no luck at all finding one at a sane price, one person was asking $500 for one that was not even recently rebuilt. The gearing seemed perfect for a turbo M42. It got pissed off and gave up when someone sent me a 4.10 after selling me a 3.73, now I'm stuck with the 4.10 for a while. Winds out way too fast with turbo setup, 1st gear is pretty much useless when I get on it. Don't have to downshift to pass on the freeway though.

Are you FI?

Sent from my Samsung Note 4

He has FI and a 6 cylinder.

[fresh_TD]

It's good for NA cars. For something forced induction, you run out of room pretty quick and find your self shifting a lot. I sit at 5th gear on the highway and I don't bother downshifting to pass someone.

Are you FI?

Sent from my Samsung Note 4

[redsubdivisions]

It's good for NA cars. For something forced induction, you run out of room pretty quick and find your self shifting a lot. I sit at 5th gear on the highway and I don't bother downshifting to pass someone.