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2L Ford Duratec + NC MX5 5 speed


RS2J

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Looking at Engine/Gearbox options for the long term Eskie plan. Came across this mentioned a few times on the interweb, just wondering if anyone has any ideas on the validity of it all? As I understand it the 6 speed is a no-go.

 

Mainly looking at this because Sierra T9s are getting long in the tooth and harder to find as time goes on. Could just stick the 4 speeder on the back of a Zetec of course.

 

Info/ideas/jarredyou'reafuckingidiot welcome :)

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Hey Jarred,

 

Not 100% sure about NC's but if the boxes mount like NA's you with have a CXXnt of a time mounting it. The NA runs a ladder frame from the rear diff through two massive vertical bolts with bushes to kind of keep the gearbox mounted, in a floppy sort of way. You would need some way of deleting the ladder frame and mounting the gearbox in a semi traditional manner. = not that easy to do well I suspect.

 

 

I can't see the Locost build but assume it may be using the complete rear subframe and some of the aforementioned ladder brace setup to tie it all together.

 

Have you considered a 4g63 and CD009, could be a cooler 2 litre and 5 speed combo? then all you need is someone to shorted a carbon fibre driveshaft for you..

 

As you know the quality of the gearbox you chose will have a massive impact on the driving experience.. i believe this is even more critical than engine selection. (do no put some rubbish 4 speeder in it please) 

 

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The Duratec is awesome.

You can get COSWORTH bits for it.
So double awesome? Don't ask, you KNOW what that means.

 

Gearbox... yes, for some fucking reason they made them different than ANY OTHER that they'd done before.

You bastards!

The MX5 6 speed bolts up... but it's a BIG BASTARD of a box because 6 speed.
They're also EXPENSIVE... well compared to a 4 :P

 

You can/should run the 4 speed. Brother in law runs one behind his duratech and that's 240 ponies worth of go on carbies 2wd rally extreme champion. And because 4 speed esky goodness :)

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You can/should run the 4 speed. Brother in law runs one behind his duratech and that's 240 ponies worth of go on carbies 2wd rally extreme champion. And because 4 speed esky goodness :)

 

240hp Duratec with a standard 4 speed Escort gearbox and it hasnt broken?

Something doesn't add up.

 

Another alternative is the Tremec T5 gearbox, but you would need to get the one with the right input shaft.

 

I am in the same position with my Duratec. A never ending search...

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Hey Jarred,

 

Not 100% sure about NC's but if the boxes mount like NA's you with have a CXXnt of a time mounting it. The NA runs a ladder frame from the rear diff through two massive vertical bolts with bushes to kind of keep the gearbox mounted, in a floppy sort of way. You would need some way of deleting the ladder frame and mounting the gearbox in a semi traditional manner. = not that easy to do well I suspect.

 

 

I can't see the Locost build but assume it may be using the complete rear subframe and some of the aforementioned ladder brace setup to tie it all together.

 

Have you considered a 4g63 and CD009, could be a cooler 2 litre and 5 speed combo? then all you need is someone to shorted a carbon fibre driveshaft for you..

 

As you know the quality of the gearbox you chose will have a massive impact on the driving experience.. i believe this is even more critical than engine selection. (do no put some rubbish 4 speeder in it please) 

 

Hah, half the reason I sold off my Mitsi shit was because it ruined friendships. I swore I'd never modify a Mitsi again  :doubt:

From what I've been reading the NC Gearbox is vastly different to the older ones that sat behind the B6/BP engines. Apparently quite a nice 'box to use and bolts up to the Duratecs from Ford as they're essentially the Mazda engine with Ford heads. If I don't stick with the crossflow and 4 speeder this is looking like the nicest option I reckon. Especially with the amount of kit available off the shelf to bolt a Duratec into an Eskie.

 

The Duratec is awesome.

You can get COSWORTH bits for it.

So double awesome? Don't ask, you KNOW what that means.

 

Gearbox... yes, for some fucking reason they made them different than ANY OTHER that they'd done before.

You bastards!

The MX5 6 speed bolts up... but it's a BIG BASTARD of a box because 6 speed.

They're also EXPENSIVE... well compared to a 4 :P

 

You can/should run the 4 speed. Brother in law runs one behind his duratech and that's 240 ponies worth of go on carbies 2wd rally extreme champion. And because 4 speed esky goodness :)

 

Yeah thats why i'm thinking of the 5 speed. Probably be a bit smaller, although tunnel mods are likely even with a dirty old Type 9.

 

240hp Duratec with a standard 4 speed Escort gearbox and it hasnt broken?

Something doesn't add up.

 

Another alternative is the Tremec T5 gearbox, but you would need to get the one with the right input shaft.

 

I am in the same position with my Duratec. A never ending search...

 

Yeah I saw a RWD Sapphire Cossie T5 on the 'tard last year, was tempted but didn't have the cash.

 

 

BDAs for everyone! Sell the house and the Mrs! :lol:

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Thats an NA/NB BP 1.8L Engine + Gearbox combo. The NC + Mazda version of the Duratec is quite different. He also states: "I also thought I'd slot the engine and gearbox in (Ford/Mazda BP and MX5 5 speed). They're sitting high as I just wanted to get an idea as to where everything will sit, the shifter in particular."

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The 5 or 6 speed Mazda box will work but the series 5 RX7 turbo box is probably the strongest. There are a number of places in the UK that do all the conversion parts but most seem to use the type 9 box. Have you had a chat to Roger Carroll in Adelaide? He makes all the parts to get the Duratec into the Escort and uses the Mazda box.

 

jrprmc@bigbutton.com.au 0408 804 795 or (08)82723981

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So.... does the NC have one of these. ( I would suspect it still does)

 

http://i484.photobucket.com/albums/rr209/Cruzmaester/MX5%20Forum/fa37759e.jpg

 

Interweb says yes it does. Hrmm might be trickier than I can manage with.

 

The 5 or 6 speed Mazda box will work but the series 5 RX7 turbo box is probably the strongest. There are a number of places in the UK that do all the conversion parts but most seem to use the type 9 box. Have you had a chat to Roger Carroll in Adelaide? He makes all the parts to get the Duratec into the Escort and uses the Mazda box.

 

jrprmc@bigbutton.com.au 0408 804 795 or (08)82723981

 

S5 RX7 boxes surely command a premium though. I imagine the rotary tax on those is fairly immense, plus i'm not building a 300+ HP race Duratec here, just looking at more modern engines from the Ford family to use that makes my job of fitting it all easy. but, as i'm trying to avoid as much custom fabrication as I can to keep costs down, if I can get bits off the shelf and a S5 RX7 'box cheap enough it could be a goer.

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What are rx7 gear ratios like?

 

I believe some sort of mount can be made to suit that nasty mounting boss, but it won't be a piece of piss - so don't write if off, just factor this in to the build if that box is your weapon of choice..

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240hp Duratec with a standard 4 speed Escort gearbox and it hasnt broken?

Something doesn't add up.

 

Another alternative is the Tremec T5 gearbox, but you would need to get the one with the right input shaft.

 

I am in the same position with my Duratec. A never ending search...

 

Goodness no.

Quaife goodies inside.

Don't think that needed explaining.

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