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New Mazda 5 Speed Conversion

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Please advise if this is the wrong place to put this message...

 

Our day job is modifying the MX-5 5 Speed gearbox to fit different British niche vehicles.

 

Off the back of that I've developed a number of kits that allow the same gearbox to be fitted to classic cars. We have targeted MGs initially and are pleased with the take-up, but do you think the Cortina fraternity would be interested in a modern gearbox for their cars?

 

We are working with a few partner companies r for Ford bellhousing options, on from their Type 9 patterns.

 

If anybody would be interested in trying out our gearbox in their car, please get in touch! If you're in the Midlands then let me know if you'd like a go in my V8 MGB demonstrator.... Thanks for reading!

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Interesting post. Maybe some pictures of your work, a link to any websites, prices, and what would/wouldn't be included in that price will get you more replies.

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Would think so as the type 9 is getting expensive/scarce now & powerwise marginal.

 

The mx5 is roughly the same size with a nice shift.

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I have a type 9 in mine but if my turbo conversion kills it I've got a spare 4 speed. I'd consider an mx5 box but depends on a few things.

 

Prefer not to make changes to the shell so if you can get the gearstick coming through the standard hole. If it's a hydraulic clutch setup it would require extra work, I'd prefer cable. Retro ford already do crossmembers for the mk1/2 cortina so the other market is mk3-5 and on all those the standard setup is cable operated clutch, most will not want the extra work of going hydraulic. Having a speedo drive that works accurately with the standard dial would be good too.

 

I guess the prop wants altering or a new one making too so it'd boil down to overall cost of your kit, 2nd hand box and prop. If I do knacker my type 9 I'll not be forking out on another only for it to fail and would look into a stronger box. I'm not alone in saying a T5 which is the best option for higher power/torque is out of the question for most, financially.

 

Imo you'd be wise to go on the various facebook cortina groups (there are a lot of them) to gauge interest there also.

Edited by wolfrace

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I recently fitted a complete mx5 eng/box in a mk1 escort, box is similar size etc to type 9 they'll take alot more power too.

Gearstick is in right place.

 

Mk1 is cable & drive fits in mk2 (it's electronic ), hydraulic master cyl are easily fitted to mk3- .

 

Prop uj is same as some Ford's so yoke can be swapped or simply change front end.

Edited by sheffieldcortinacentre

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That's good to know. Still don't fancy the faff fitting hydraulics though. I had an mx5 about 10 years ago, always heard people getting good power from the standard engine and never complaining about the boxes not coping. The only trouble I had was stiff change from 1st to 2nd on mine from cold, which was common. I've always thought the Japanese put together decent engines/boxes. RB26 skylines running 700bhp 2JZ running over 1000 etc.

 

Prob cheaper to do a full mx5 turbo conversion than just go n/a zetec.

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Mx5 was £300 with half back from weighin,cat etc ( scrap was down at time),

 

So eng/box,pump,loom/brain cost roughly price of a type 9, plus had prop for yoke.

 

Roughly same power as silver top zetec.

 

He wasn't bothered but I measured rear end & it was narrower than original So 7 in rims would've gone under std arches & an lsd was £75-100 & straight swap.

 

To me its a no brainer for 100/105e,escort,avenger/sunbeam,viva/chevette size cars.

 

Similarly Lexus are ideal for larger cars plus quite a few have lpg already fitted.

Edited by sheffieldcortinacentre

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That's good to know. Still don't fancy the faff fitting hydraulics though.

 

I'm similar - I don't suppose it's that hard once you get into it, and I'd quite like a bias pedal box with the three reservoir pots.

 

Amazingly my type-9 was pulled out of a mate's garden 10 years and 20,000 miles ago, covered in moss and with dubious looking oil inside, but it's still going strong.

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I think the rep for type 9s being weak is unfairly earned but I think if you are putting a lot of power through it and launch from a standing start a lot, especially in the dry or with a heavier car like a cortina mk3, it'll suffer.

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By the time I'm done with pistons, rods, arp studs, TT manifold, loom, Ecu, hoses, and got an exhaust built my 205 pinto turbo will probably have cost around £2k. If I hadn't spent that I'd have mx5 running gear. like Craig said a mx5 is ideal, cheap, good power, reliable and economical. And they can be turbo'd or supercharged for less than a grand.

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Oh no you've got me considering the Mx5 engine again now. Already got the zetec and Rx8 box. Engine is still in the car (Mondeo) and using as my daily at the moment!

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It's grip that kills them, dumping the clutch in something cortina sized will soon kill one, I've run then to high milages Inc towing etc & there fine, but if you want to abuse them then ford wise you need an mt75 or T5.

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Thanks all, great info and advice.... We have a lot of requests for a pinto/ crossflow/ lotus twin cam setup (all the same bolt pattern I believe) so once we have the bellhousing sorted it's just mounts & gear levers etc.

 

We only use the MK3 5 speed, new from Mazda, but modify the case to take either a mechanical or electronic Speedo drive.

 

Type 9's have been the go to box for a long time, but you can't buy a new one and good recon boxes are getting harder to find and expensive!

 

For big torque (300+ lb.ft) and good grip I'd for a T5 as sheffielcortinacentre said, but with the narrow tyres most classics run the MX5 box is fine. If it's good enough for the Caterham 620...

 

I'll let you know when we have something ready!

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