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9 registered (Wirewheel, middlekingdommog, Quicksilver, twotribes, Boshly, tmg513, John +4, Robbie, Heinz),
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Max Online: 150 @ 07/04/11 04:44 AM
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#91255 - 04/05/12 10:08 PM
Re: Throttle bodies for 4/4/ Sport
[Re: Easter]
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Talk Morgan Addict
Registered: 08/02/11
Posts: 3482
Loc: worcestershire UK
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I think it's an age thing.... To be honest the sigma is fine when you work at it, but if you want to let the engine do the work then the V6 is in a different league, top gear for instance has a 100mph span Kind of you to say so Richard  I'm sure I'd be seduced by the V6 as yes, it's in a totally different league to the Sigma but I like the width of the 4/4 and the Sigma is a fun engine too....even more so when I get those throttle bodies on! AND my sump is higher than yours 
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Jay
2010 4/4 "Super Sport "
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#91257 - 04/05/12 10:19 PM
Re: Throttle bodies for 4/4/ Sport
[Re: twotribes]
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Talk Morgan Enthusiast
Registered: 12/04/11
Posts: 1693
Loc: West Paris, France
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Thought about the diff but decided to stay standard for what is a road, not a track, car.
I don't know if the MX5 gearbox has the (ridiculously) long top gear of the Ford 'box, but I suspect not as the stated CO2 is now +4g/km worse for the MX5 box 4/4.
If I find the gearing too long, then I can alter the final drive ratio at a later date.
Let us all know what decision you make...
The +4g/km came at the beginning of 2011 as a result (I believe) of the move to Euro 5. Mine is down as 143g/km & has the ford gearbox, so it occurred before the arrival of the MX5 box.
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Giles. 4/4 sport.
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#91263 - 04/05/12 11:37 PM
Re: Throttle bodies for 4/4/ Sport
[Re: pandy]
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Learner Plates Off!
Registered: 07/09/09
Posts: 439
Loc: Cologne, Germany
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TBH, and I´m a layman, usually there is no question that a six beats a four. That is totally obvious regarding people carriers. But if a car weights minus a ton a four can beat a six. That´s my experience. As lighter a car gets as more counts the weight of the engine. Last weekend I could go with a 400HP AC Cobra with my Lotus Elise, 220 HP, 1.8 radial compressor charged up to 100MPH when accelerating side by side.
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#91281 - 05/05/12 09:21 AM
Re: Throttle bodies for 4/4/ Sport
[Re: pandy]
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Salty Sea Dog
Talk Morgan Guru
Registered: 03/07/07
Posts: 7356
Loc: Cheltenham, GLos. UK
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If it's the 5 speed MX-5 box, you won't need the shorter dif ratios. 5th is not an overdrive gear. One of the reasons I wasn't keen on my Mk1 - it needed an overdrive IMHO...
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Graham (G4FUJ)
B3808 RTA 51R '76 4/4 Ivory 2 seater
'01 Freelander TD4; '90 Defender 90 SW
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#91285 - 05/05/12 09:39 AM
Re: Throttle bodies for 4/4/ Sport
[Re: Graham, G4FUJ]
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Learner Plates Off!
Registered: 07/09/09
Posts: 439
Loc: Cologne, Germany
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MX5 2.0 NC1E 5 speed:
1. Gang 3,136
2. Gang 1,888
3. Gang 1,330
4. Gang 1,000
5. Gang 0,814
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#91286 - 05/05/12 09:43 AM
Re: Throttle bodies for 4/4/ Sport
[Re: Heinz]
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Salty Sea Dog
Talk Morgan Guru
Registered: 03/07/07
Posts: 7356
Loc: Cheltenham, GLos. UK
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The ratios have changed a bit since the Mk1 then... Or maybe the Mk1 diff was short ratio...
3000 rpm to get 60 mph in 5th was short for a 1.8i - particularly when my T16 +4 would give 75 mph for the same revs...
Cheers,
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Graham (G4FUJ)
B3808 RTA 51R '76 4/4 Ivory 2 seater
'01 Freelander TD4; '90 Defender 90 SW
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#91292 - 05/05/12 11:13 AM
Re: Throttle bodies for 4/4/ Sport
[Re: Graham, G4FUJ]
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Learner Plates Off!
Registered: 07/09/09
Posts: 439
Loc: Cologne, Germany
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I guess this is the gearbox Morgan uses now. Mazda has a 4.1 axle ratio. The P4SS has 3.7. After some 1000km I´m happy with it like it is. Enough torque, "long wind" and also quiet on highways.
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