Anybody put a 4.9FD in their B16A box?

[dougie_504]

Anybody done this and able to comment on their high-speed driveability (cruising specifically)?

Internet calculators suggest my 0.870 5th + 4.9FD = 4,000rpm @ 100km/hour.

Wondering if its worth considering sourcing a B18A 5th gear which is 0.717 and supposedly equates to 3,300rpm.


So, any personal experiences?

This isn't a daily driver and highway miles would be scarce but I don't want to rule out the possibility of jumping on the eastern freeway or doing a rural road trip...

[trism]

my old 20v blacktop corolla sat at 3800 at 100km.

it was fcking horrible.

[riruiz_88]

im willing to know as well...

[dougie_504]

I'm assuming its terrible but just want some anecdotal feedback.

Probably just going to grab myself a B18A cable 5th gear anyway

[lil_foy]

I have one in mine. B16a2 box with osgiken 4.9 final drive and mfactory lsd.
It sits at 4000 rpm @ 100kph but its not my daily so I dont care. I've done various 1h+ trips without worrys. The acceleration is fantastic though!

[mocchi]

whats your tire profiles n8s

[dougie_504]

I have one in mine. B16a2 box with osgiken 4.9 final drive and mfactory lsd.
It sits at 4000 rpm @ 100kph but its not my daily so I dont care. I've done various 1h+ trips without worrys. The acceleration is fantastic though!

Does the engine noise piss you off at all, or the higher workload bother you?


mocchi I'm running 195/50/15 and another setup 185/60/15

[mocchi]

Does the engine noise piss you off at all, or the higher workload bother you?


mocchi I'm running 195/50/15 and another setup 185/60/15

that really depends on what exhaust youre running ay
4krpm is pretty much same like stock dc2r 100kph 195/50/15

[chez00]

It'll definitely drive you mad eventually in a daily, but for a weekender a 4.9's the ****.

[lil_foy]

Does the engine noise piss you off at all, or the higher workload bother you?


mocchi I'm running 195/50/15 and another setup 185/60/15

B18cr + 5zigen headers + fujitsubo rm01a.
It's fine for me, I don't even have a stereo either. You're only under very light load so there isn't much exhaust noise. The extra workload was just a compromise I had to live with going to it. The performance gains outweigh the downfalls for my occasional highway driving.

[dougie_504]

Setup is JDM B16A. CAI, Rs*R header, high flow cat, Kakimoto R full cat-back, ITR TB + IM, Skunk2 Pro1 camshafts and adjustable gears, Jun oversized valves, Supertech titanium retainers and HD valve springs, enlarged intake/exhaust ports, matched manifolds and re-welded combustion chambers (smaller for higher comp/more flow).

Exhaust isn't too bad, it's a nice oval muffler, typical JDM piece good deep/throaty sound and high-pitched screaming up to 9,000rpm.

And yeah, just a hobby/weekender so I don't foresee much highway driving but I don't want to hate it too much if I drive down to say Apolo Bay and get some 110km/hour highway action.

4.9FD is ordered an definitely going in, just wondering if I should consider lengthening the 5th gear to bring the rpm down a bit at cruising speeds as I don't predict much need for 5th acceleration. By my rough calculations the longer 5th + 4.9FD should pretty much be similar to my oem setup of shorter 5th + 4.26FD.

[pat88c]

Nice information on 4.9 Fd

I know brett off crx aus has b18a 5th gear in his ef8 worth ask him what he thoughts on the 5th gear