Which diff ratio for M42?

[Wh33lhop]

I can do a diff swap in less than 20 min...

I call BS. An hour maybe.

[Dj Buttchug]

I call BS. An hour maybe.

dude no. jack car up. 4 lock nuts for driveshaft. four bolts up top to subframe. and axle bolts.

done.


shits easy when youre not fighting rust and fucked bolts ect.

[Schnitzer318is]

It takes me about 20 mins just to get the car in the garage and jacked up...

[nando]

same.. lol. plus you should really wait for the exhaust to cool unless you like being burned.

[tjts1]

I can't believe some of you are suggesting longer gears. These things are a slug with 4.1

Thats because 4.1 is too short.

I didn't find the change to the 3.73 to be as dramatic as some of you are making it out to be. If you do any driving on the highway, it's a step-up from the 4.10 in my opinion.

It has slightly less "snap" acceleration-wise, making it feel more like a normal car, but it's definitely not sluggish and I personally love not having to change gears so quickly. I honestly wouldn't be surprised if 0-60 times improved.

1 fewer shifts to 60, 1 fewer shifts in the 1/4. Win on all counts.

[gearheadE30]

In my boosted car I went from the 4.10's to the 3.73's and HATED it. Took longer to build boost and "felt" slower. It might be a tad faster from 0-60 because of one less shift... but other times it is ALOT faster because of the decreased boost time.

That's been my experience anyway... ymmv.

Well, I'm changing it up in hopes of actually building boost in 1st and building it sooner in 2nd. I'm at full boost by 3k-35k revs, but I run out of gear in 1st so fast that I'm only getting maybe 4 psi, and second revs out so fast its after 4k when I'm at full boost. My assumption is that having the car in gear longer will result in more time for boost to build so that I have more time in the powerband in the first 2 gears. Not that I really think it'll make much difference, hah.

[nando]

I'd rather be accelerating than "boosting". :p

[KenC]

Thats because 4.1 is too short.


1 fewer shifts to 60, 1 fewer shifts in the 1/4. Win on all counts.

Who the hell cares about 0-60? It's an arbitrary number.

Its still three shifts in the 1/4mi even with a 3.73... if you're dumb enough to drag race an M42.

[tjts1]

Its still three shifts in the 1/4mi even with a 3.73.

Right, because your M42 is going to trap over 95mph. Keep dreaming.

[KenC]

For some reason I was thinking putting it into first was a "shift." Either way, even with a 4.45 you're in third gear at the end of the 1/4mi... same as a 3.73.

[tjts1]

The best trap I've seen (yes I'm dumb enough to drag race an M42) was 88mph with a 3.73. Assuming you could pull off the same trap with a 4.10, that would require 4th gear. Same for 4.27, 4.45...

http://farm1.static.flickr.com/231/511886664_d1dc947c06_o.jpg

There is really no advantage to the 4.10 diff in the real world.

[nando]

The best trap I've seen (yes I'm dumb enough to drag race an M42) was 88mph with a 3.73. Assuming you could pull off the same trap with a 4.10, that would require 4th gear. Same for 4.27, 4.45...

http://farm1.static.flickr.com/231/511886664_d1dc947c06_o.jpg

There is really no advantage to the 4.10 diff in the real world.

or you could buy a chip and not have the stock redline?

[2002maniac]

Who the hell cares about 0-60? It's an arbitrary number.

Its still three shifts in the 1/4mi even with a 3.73... if you're dumb enough to drag race an M42.

exactly. who cares how fast you get to 60. Are you going to stop there?

[M-technik-3]

I say get two M42 owners lined up side by side and see who is quicker. Enough bickering.

[KenC]

I guess I'm always assuming everyone has a chipped M42...

My MarkD doesn't redline until 7200 (makes power up to 6800 or so).