twothirdsCobra

iTrader: (3)

No, what I’m saying is that if you have a stock Miata, the Quaife ratios with the 4.1 R&P and OE diameter tires will have no problems with take off which was what I was addressing. As for my Miata, yes it's under 300 WHP. I didn't conceive this gear set with the sole purpose of making it more robust than the OE 5 speed. For the price of this gear set, just meeting that goal would not have enough value to manufacture and market it. There are other benefits to the Quaife gear set.

Laur3ns

Thanks for your input. Can you comment on the MY2000 box as a donor, the 2nd gear synchro please?

twothirdsCobra

iTrader: (3)

Truthfully, I didn't check each years case for fitment. That said, as long as you use the 95-97 syncro's, slides, stops etc.... the gear set should work. As I posted above, I used/provided a 95 case for fitment.

Laur3ns

The new box should be here somewhere next week. I've heard of no issues putting it back together other than the reverse synchro being bad on the donor.

Meanwhile, I'm taking the car apart (PPF, driveshaft, etc) and can't remember what I did with the downpipe last time. I suppose disconnecting the downpipe from the turbo so I can move it around will be the minimum I need to do. But as a whole it won't go out of the car. It's a BEGI SSSG that used to be two parts - I don't see them coming apart ever again.

I need a transmission jack too...

Faeflora

iTrader: (2)

Also check gear clearances. FM said they had an issue with gears binding. catastrophically.

Laur3ns

Thanks, sounds plausible:

Spoke to the builder. He mention some machining and adding rings somewhere. I should have pics soon. Basically, the box would shift like ---- if put together as Quaife intended (maybe because my donor is MY00 and the Quaife was blueprinted MY95).

It should be ready to pick up end of this week.

Laur3ns

Box is back together. Some machining, shimming, etc to make it the smoothest box. The gear set is definitely not 'drop-in'.

Quaife:

Compare to OEM:

18psi

iTrader: (76)

bad a$$

Laur3ns

One month later and the new gearbox has finally mated with the engine. Of course it was a total bitch to position, but should be the last gearbox this car will see.

Sorta need to figure our with bolts went where on the bellhousing. There are 2 longer ones, 3 thin ones around the starter and the rest is virtually the same. Where to the 2 longer ones go?

shuiend

iTrader: (24)

I believe the 2 longer ones go on the driver side to hold on the stick down pipe bracket.

Laur3ns

Gearbox running!
https://vimeo.com/44148073

DeerHunter

Yup, sounds like a Quaife gearset, alright. Noisy in every gear except 4th. How do you like it so far?

You didn't seem to have any problems with 911s of any vintage. What's your curb weight and power? What tires/suspension are you running?

Laur3ns

Like it very well. The gearing is perfect (for this track at least) with longer 1, 2, 3 and 5th. Less gearchanges than before and more top speed. I have the short, short, short, 1:1, wide gears.

Around 292 crank hp (245 wheel) and 2200lbs excl driver, running a GAZ suspension combo with 800/500 and aero (splitter + GTC200). GAZ is used in the UK & Dutch MaX5 cup (SM equiv.).

Laur3ns

Another session:

DeerHunter

Yikes, close call at about 7:27. Did you have to clean your driving suit afterwards?

There seems to be a lot of kick-back through the wheel. Is it a particularly bumpy track? Converted to manual steering?

You managed to dispatch the orange GT3-RS again, this time pulling him on the straight. Well done.

Laur3ns

No, but I did move brake bias forward

[quote]There seems to be a lot of kick-back through the wheel. Is it a particularly bumpy track? Converted to manual steering?
It's a converted manual with welded pinion. It's not super smooth, but not _very_ bumpy either. I think part of it is me driving

Yeah he was in the way. He must've short shifted because those cars have like 450+ hp? Either way I was going to take him in T1

Mobius

iTrader: (2)

So many slow BMW's, so little time

Laur3ns

Update: I love the new Quaife for it's ratio's and smoothness - but 3 extension housing bolts fell out last time... i suppose they were reused during assembly and that seems to be a no-no.