z3 tranny highway speeds?

[Boostedtaco]

Who has a z3 and what's their highway cruising speed?

Reason i ask, is i'm torn between the TSX 6th gear or z3 tranny for lower highway rpms. the labor and parts is roughly the same and i'd get a LSD with the z3 tranny.

Both tranny's would have the same 6th gear ratio and have the same Final Drive. and roughly the same rpm at @ 70.

i use the k20a tranny chart and this calc.

http://www.turnzero.com/technical_re...ear_calculator

[AKEP]

the 6th speed gearing is the same for z3 as the tsx 6th in the a3 tranny (already stated)

idk how your going about it, but if you do any wrenching, and have the money, its probably better if you just swap the z3. im going the other route because i'm doing all the work myself. for $900 i have a new 3rd, 6th, and an LSD.

[bchaney]

The calc you posted tells you what your rpms will be when you're cruising. What exactly are you asking? If you're wondering which setup is better - it's really a matter of personal preference.

Keep in mind you're not going to be able to use the z3 case in the w/o mods. idk if you calculated that into your labor costs.

[AKEP]

didnt know that, what needs to be done?

[bchaney]

http://www.k20a.org/forum/showthread.php?t=40933

[ryboto]

I'm contemplating the same thing, add the 6th, or get a 'new' transmission. Used Z3's seem to go for around $1k, so the 6th gear would be cheaper, but my A3's transmission is 80k miles old. Really need to do something, the engine swallows gas when I commute.

[cloumep3]

Compared to a3 tranny, my z3 tranny in 6th gear def. revs lower rpm; 3 to 3.2k rpm at 60mph ish. Not sure about the gas mileage since many mods been added with the swap, but the highway cruise is much smoother (or lower rpm).

[DaveSi677]

Im debating on doing a 6spd swap this summer as I have that horrible 3rd grind!

[i_love_my_ep3!]

Im debating on doing a 6spd swap this summer as I have that horrible 3rd grind!

i have 65k on my ep3 and my third grinds only when i got on it the grind is very little grind but still there around what mileage dose it start to grind horrible

[ep3jd]

i have 65k on my ep3 and my third grinds only when i got on it the grind is very little grind but still there around what mileage dose it start to grind horrible

Hah. I have 125k and nothing grinds. You should treat your ep a little nicer.

[talonXracer]

You would be FAR better off going with an 02-04 typeS 6spd and convert it with the TSX/Z3 6th gear if you are in search of better fuel economy and you do not have many hills on your commute.

The 4.7fd's are a economy killer for sure!!!

[ryboto]

Compared to a3 tranny, my z3 tranny in 6th gear def. revs lower rpm; 3 to 3.2k rpm at 60mph ish. Not sure about the gas mileage since many mods been added with the swap, but the highway cruise is much smoother (or lower rpm).

That doesn't sound promising. In 5th, my car does 60mph at 3k....so having a 6 speed gives you zero improvement over the 5?