4.7 final drive vs 5.1 final drive

[Super-DA9]

No it's too high unless you have a different (higher) FD.

my b18c7 4.7 LSD eg runs at a stable 3.5 at 100 kmh



that sounds about right ! ... is 3850 normal at 100 ks !?

oem dc2r is 3500rpm @ 100km/h & roughly 115-117km/h @ 4000rpm.

from memory.

lmzooooo

Hmm that is worrying haha!

I will check next time I drive it and let you guys know if I was possibly on drugs or if it really is as high as I remember. :P

[DC2-PWR]

oem dc2r is 3500rpm @ 100km/h & roughly 115-117km/h @ 4000rpm.

from memory.

lmzooooo

Sounds right, mines nearly the same.

I checked mine through the mfactory calculator and it's spot on

[Bludger]

my dc2r is hardparked.

only gets driven interstate.

lmzoooo


I have no interest in dc5r's so sorry for OT.

[DC2-PWR]

^ haha interstate travelling is fun, wish i could do that

here use this
http://www.teammfactory.com/gear-calculator

its accurate enough to give you a figure at what rpm's you will/be travelling with different FD's. check your own too - dw too much if its not the same as what your cars doing, because our rev gauge isn't that accurate.

[eg5civic]

As I said before it could be a 4.9fd or your tacho might be out?

[mocchi]

how come no one put up their tire spec when comparing?

[Bludger]

how come no one put up their tire spec when comparing?

because I (if not all the people replying) assume they are not the type to run 20" chromies.

[DC5FTW]

Is a good idea for 6speed gear box

[pe45678]

i love 4.7 more

[_bORdO_]

....
anyway

OP - test it out but im sure in the long run you'll get over it & change back
if you do go through with it, give us some feed back on how crap it is...
or good.

[45SET]

How exactly do you break a final drive?

[r3ckless]

Im going the 5.1 FD from my 4.7. I am also isntalling the Accord euro/TSX 6th gear to keep rpms i think 2800 or 2500 rpm with the 5.1 fd at 110km/h . So that means I'll have more acceleration in gears 1-5 and 6th gear, the revs will be even lower!

I dont think the upgrade will have any downsides.. I mean on the FN2R/FD2R, their gear ratios are exact same as the dc5s, except for shorter final drive. So when i upgrade my FD to 5.1 and using 17inch wheels instead of 18inch, it should be a good increase in acceleration without over doing it.