Honda Type R

I'm throwing together a toy for back road corner bashing. I plan to use a B16 trans with a MFactory diff but I'm also thinking about just getting a ITR trans instead. What do you guys think about it?

Thanks,
Frankie

VTECIntegra9

I've not driven an MFactory diff only the OEM and don't have an issue with it...

But then again I'm afraid to drive a really great LSD car because then I'll want to swap mine out. Curious what the cost difference is?

Kozy.

They state that the 'bias ratio' is the same as OEM.

I know they are not the same car, but I had a Quaife in my EK4 and the OE LSD in my ATR. The Quaife made itself known when it was loaded up, it properly grabbed the wheel from your hands and drove itself round the corners, quite a sensation the first few drives.

The stock one in the ATR, well you never really know that it's there. It just does it's job, going exactly where you point it and without too much feedback through the wheel.

It is entirely possible that I haven't driven the ATR hard enough to really experience it however, it is my family wagon and only sees light road duties compared to the Civic which was the weekend racer.

Billy Elliot

You talking about the helical Mfactory diff? Or you talking about their clutch type diff?

Why are you only looking at Mfactory or OEM and not something like Quaife, Wavetrack and if you're looking at a clutch type why not Kaaz, OS-Giken and such?

Sorry to ask questions and not help since I run a Kaaz in the rally car I don't have any help to compare an Mfactory to ITR diff.

SlowB16

I have the factory unit in my b16 trans and like it. I can't compare it to the itr unit, though. If I had it to do over again I'd probably just buy an OEM itr tranny because it would have been less expensive than have my tranny built (mfactory lsd and carbon rebuild kit).


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Honda Type R

Well, I'm not too sure the difference since I haven't bought the B16 trans yet. I'm assuming it'll be close to the same cost either way. Assuming either trans isn't completely boned & needs an overhaul

Thanks for the feedback!

I'm looking at the helical diff. I don't want to run a clutch type because I'm not competing & I don't want to have to worry about rebuilding it later down the road or having to take it apart to shim it because it don't like how it's set up. The main reason I like the MFactory diff is the cost! I'm on a bit of a budget. I know "budget" & "toy car" don't belong together lol

Aquafina

iTrader: (3)

MFactory helical has the same bias ratio as OEM (as does Quaife, all are 2.1:1) but transfers power more aggressively. There is a noticeable difference from the OEM R LSD's. The Stage 1 upgrade for the MFactory helical has a more aggressive bias ratio (2.5:1) for better handling.

The MFactory helical is also much lighter than OEM (OEM is cast case, billet gears. MFactory is forged case and gears).

Honda Type R

What does the more aggressive bias ratio do? I'm not to terribly familiar with how diffs work. All I know is I like the diff in my FA5 lol

Aquafina

iTrader: (3)

Transfers the torque more aggressively. You'll notice it takes less throttle input for the car to rotate (it will feel similar to going from an open diff to an LSD).

Honda Type R

I was just checking out the website & the stage 1 upgrade says "off road use only". Will using it on the street in daily driving type situations going to cause any damage to the diff? I plan to use it in mixed driving but most of it will be pretty aggressive.

VTECIntegra9

I believe they say that for liability. Also I'm sure the street drive-ability might be compromised - meaning you might actually notice it's there.

Kozy.

A lot of aftermarket parts are marked like that. It's an easy get out clause for the manufacturer when something breaks and a lawsuit begins...

Aquafina

iTrader: (3)

It does behave differently than the lower bias ratio and shouldn't be used for street use. It won't damage the LSD though.

Honda Type R

I can only assume that you two are right but it's best to know for sure.

So if its used for street use, will it just chatter in parking lots & what not?

Aquafina

iTrader: (3)

No, it will not chatter as it's still a helical.

Honda Type R

I guess I don't understand diffs enough. What makes it not suitable for street use?

Aquafina

iTrader: (3)

Nothing, but it is not recommended.

Honda Type R

Ok

FlewByU352

I've been watching this thread since I would like to know more about differentials and I don't understand why it's not recommended? Why does it's behavior make it not suitable for a street car? Does it make it hop in parking spots and U-turns like a welded diff? In for more info!

Honda Type R

It won't do any of that stuff cuz that's all related to a clutch type diff. I emailed MFactory to ask if they would get more detailed in explaining why not to use it on the street

Aquafina

iTrader: (3)

Plain and simple, liability. If you want to drive it on the street then it will function perfectly fine. No clunks, wheel hopping, etc.