Diffs

[Boags]

As for the understeer issue, change your driving style.

Yep, the first few laps I took MX5 lines... Bad idea.

It got much better with a different line, but I'm nowhere near good/consistent enough to remove all understeer. It catches me out if I'm not prepared for it... My driving style is prone to understeer actually, I guess I need to spend some time with an instructor at a skid pan day to fix it... *HINT HINT*

Boags

[CT]

With MX5 race cars usually you run in to a problem with lifting the back wheel going around corners,espesicaly with slicks...Torsens start to spin as soon as you unweight one wheel,so for racing applications Torsens don't usually work...I have just gone to a lock diff. in my SE.

If you want to run a LSD you usually need to run a tight clutch type set up which are pretty expensive and need to be rebuilt,stick in a spool and you never touch it again.

Torsens and Gurus work fine in road cars...

Hey Brian - what Lou said is correct. I had my guru re-built before I sold it because the heat had annealed the spring washers and it had stopped working properly - again, race cars are far more severe on components. However, Guru (or whatever they are called now) did provide excellent service and looked after fixing it when it did play up.

A full spool locks both axles together - like a real racing car!!!!

[nfs13b]

I vote for the commodore diff.... when I was driving it on the street with the spool in it you wouldnt even notice or hear it unless you were stopped and turning into a car parking spot.

Bit more complicated to set up I guess but once done its something you can forget about. I have had it in the car for over 2 years now and havent had to worry about it once.

The real test will be to see if it still works when the new motor goes in.

[Sheck]

Hahahah its not the hardest diff to fit in there but it is alot of work!!! Refer to this website:
http://www.geocities.com/crash41301/

Basically you need a big huge mount for the front of the diff (too small and it'll rip apart and punch a hole into your fuel tank) cusom tailshaft, and mount for the ppf if your still gonna use it. The you gotta look at the axels, so you got custom hubs and some custom spacers to keep the drive shafts in position. This will aslo widen the track a little.

Dave

[nfs13b]

i know, i'm not looking forward to the bill *sigh* this is just turning into a nightmare isnt it. i've barely dríven the car and i'm already sick of it.

Welcome to extreme car makeovers

[lowmiata]

Hahahah its not the hardest diff to fit in there but it is alot of work!!! Refer to this website:
http://www.geocities.com/crash41301/

Basically you need a big huge mount for the front of the diff (too small and it'll rip apart and punch a hole into your fuel tank) cusom tailshaft, and mount for the ppf if your still gonna use it. The you gotta look at the axels, so you got custom hubs and some custom spacers to keep the drive shafts in position. This will aslo widen the track a little.

Dave

I looked at an mx5 down the coast with a 13b in it for sale once,
it still had the PPF! but only the first 600mm of it! there was an L bracket off that and that was bolted straight to the floor of the car!
(it still had 1.6 brakes too)!!!

[nfs13b]

I still have the 1.6 brakes on the rear.

[nfs13b]

Well, I must say that I've been thinking that this is really the car for the very seriously cashed up. Why not cut your losses and trade back/up to a stock(ish) MX-5?

It depends what you want the car to do and what your prepared to settle for..... but yeah, it can be very costly

[Sean]

How much could a 1.8 diff actually stand up to? the car will be in the vicinty of mid 200kw, and i would probably get a torsen.

There are a handful of MX5s in Australia making over 200rwkw that are stret dríven on non locked 1.8 diffs, at least 2 ofthem have seen numerous hard launches at drag racing meets and a few track/skidpan days.

Both have had the diffs out recently and no noticable damage.

[JBT]

Well, I must say that I've been thinking that this is really the car for the very seriously cashed up. Why not cut your losses and trade back/up to a stock(ish) MX-5?

[nfs13b]

just got off the phone with the shop and he managed to secure an RX-7 S5 diff with a Kaaz 2-Way in it score! only problem is that we'll be looking at around $2500 in total for the operation will be done sometime next week though. now to find the cash

I think my commodore diff/axles cost about that much......

[nfs13b]

as in the parts? or the whole setup? thats an expensive commodore part

As in parts, installed in my car with billet axles

[nfs13b]

damn.......feel like being generous

LOL, I thought I was being generous sharing the information

In about 6 months I will probably sell my IRS setup and go to a live axle.... not that it will help you too much now.

[Sean]

just got off the phone with the shop and he managed to secure an RX-7 S5 diff with a Kaaz 2-Way in it score! only problem is that we'll be looking at around $2500 in total for the operation will be done sometime next week though. now to find the cash

I think my commodore diff/axles cost about that much......

Now that you mention it, Matt at MR ENforcer quoted me pretty much the same price to install commodore IRS in my MX5, we ended up fitting the 1.8 instead.

Bad news mike - they are in SYdney...