BigJimnyMeet (North) 2024 (12 Jan 2024)
14th July 2024
Parkwood Nr. Leeds
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Gearbox upgrade - MX5 to M series engine
- Posts: 1039
- Thank you received: 305
- Points: 5197.00
I went for a blast in one of their 2.5 Zetec engined cars and was so impressed that I failed to ask many pertinent questions... 0-100-0 less than 14 seconds... A lot faster than the previous fastest car I had been in, a group A Cossie... Mind at 670kg, it would be quick if it was powered by knicker elastic...
I hope to get back to them soon, I need a CAD drawing of the engine or get one CMM'd at an old clients.
sniper
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Perspective. You are discussing a fairly significant level of modifications in order to achieve a small change in one of the gear ratios, and after all that you will still have an 80hp car. Yes the MX5 engine is heavier (as is the gearbox) but it also offers a very significant increase in performance for just a little more outlay than you are considering spending to "fix" the ratio of 1 gear...sniper wrote: Busta - The motorsport engineers I've spoken to today fit the boxes in a number of different cars and according to their CAD, it can be done with just a small shifter move and a modified gearstick, as mentioned... No bubble burst... A £500 ECU won't resolve an iron blocked engine weighing nearly twice as much as an all alloy M series... Oh and apparently 6" is plenty....
sniper
I'd also be interested to hear why they suggested a viscous coupling between the gearbox and transfer case.
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Lambert wrote: Any chance of pictures of your mx4by2?
As the old saying goes, a video speaks a thousand pictures.
We had 2 Jimnys going around the field at the same time and the MX5 was literally running rings around them. And it was the only one that didn't overheat!
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- Posts: 1039
- Thank you received: 305
- Points: 5197.00
As for spend, I do things differently to most but I have a car that does what I want it to, how I want it to do it....
sniper
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If it helps you can put my name down for the propshaft, gearstick and gearbox mount but I have no interest in the parts required to mate it to the M series engine.
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- Posts: 1039
- Thank you received: 305
- Points: 5197.00
A batch of 10 would keep the numbers to a cost/benefit ratio that some may be interested in, that's why I asked. Still feel that it is a sound proposal for me....
If you have no interest....
sniper
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- Posts: 1039
- Thank you received: 305
- Points: 5197.00
The taller first would be a benefit off road from my (limited) experience, anything that it won't cope with will be addressed by low range.
sniper
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Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!
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I must say, the concept of a higher 1st gear being better off road is a new one to me!
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- Posts: 1039
- Thank you received: 305
- Points: 5197.00
There are low box gears when needed and a slightly higher crawl in first would suit a lot of the very slow driving that I do....... I have a 410 transfer and three selections of diff ratio's to play with..... and then tyre size isn't fixed either....
If the engineers can sort it, I'll be doing it.
Keith very kindly gave me a CAD drawing of the rear block, we should be able to find out if it is a goer next week.
sniper
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