All great things have a beginning

[Paul_13]

What engine is going in this?

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[Grant Monkhouse]

Wow, you have been busy 

Any chance of popping the Rotary in you may still have.

Gear box could well be the same length because the R3 uses that same  MX-5 box.

I do still have it and it'd going in this car along with my turbo

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[Paul_13]

The rx8 gearbox and mx5 gearbox are ever so slightly different on the mounting bolts. The bottom bolts line up. The top ones are about 20mm out.
I used a adapter plate.
Or get a 6 speed rx8 bellhousing and use the mx5 gearbox.

Mx5 and rx8 have different prop shaft ends.

All of this is detailed in my build thread by the way. Strongly suggest you have a read, will save you a lot of agro

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[Paul_13]

Clive. I don't see how the r3 gearbox is the same?
The propshaft ends are different sizes

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[Grant Monkhouse]

What engine is going in this?

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Full bridge port  single turbo motor aiming for 500hp eventually

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[re japi]

What engine is going in this?

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Full bridge port  single turbo motor aiming for 500hp eventually

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Nice, thats going to be fun in that chassis


Lähetetty minun G8141 laitteesta Tapatalkilla

[clive]

Clive. I don't see how the r3 gearbox is the same?
The propshaft ends are different sizes

Always learning, the popular belief is that the 6 speed MX-5 NC and the R3 shares the same box. Never seen one side by side personally but perhaps this theory is due to reverse being in a different position to the series 1 RX-8.

On a different note, its only over the last year that I realised that the FD box and RX-8 5 Speed gear boxes are interchangeable by just changing the bell housing and tail shaft cover.     

[Grant Monkhouse]

The rx8 gearbox and mx5 gearbox are ever so slightly different on the mounting bolts. The bottom bolts line up. The top ones are about 20mm out.
I used a adapter plate.
Or get a 6 speed rx8 bellhousing and use the mx5 gearbox.

Mx5 and rx8 have different prop shaft ends.

All of this is detailed in my build thread by the way. Strongly suggest you have a read, will save you a lot of agro

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I'm using a 5 speed FD rx7 gear box I think if I use an rx8 one I will have to purchase a different clutch and flywheel.

I will be getting a prop shaft made up, fd slip joint Hong at the front and mx5 UJ at the diff end. Last time I looked into it they were only 100 quid

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[Grant Monkhouse]

What engine is going in this?

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Full bridge port  single turbo motor aiming for 500hp eventually

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Nice, thats going to be fun in that chassis


Lähetetty minun G8141 laitteesta Tapatalkilla

Yep, although I'd rather not have it at full power until it has a cage in it

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[Grant Monkhouse]

Clive. I don't see how the r3 gearbox is the same?
The propshaft ends are different sizes

Always learning, the popular belief is that the 6 speed MX-5 NC and the R3 shares the same box. Never seen one side by side personally but perhaps this theory is due to reverse being in a different position to the series 1 RX-8.

On a different note, its only over the last year that I realised that the FD box and RX-8 5 Speed gear boxes are interchangeable by just changing the bell housing and tail shaft cover.   

I think I might have to find myself a 5 speed rx8 gear box also, rx7 gear boxes are going for 300 quid where as I bet rx8s are cheap

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[Grant Monkhouse]

Also something I had been told is that an rx8 gear box is slightly shorter than an fd gear box?

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[Grant Monkhouse]

Just checked and rx8 5 speeds are about 100 to 150 quid, might have to start collecting a few for storage as I will no doubt break the input shaft at some point

I think with using an rx8 gear box Clive told me I have to use a clutch from an FC RX7?

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[re japi]

What engine is going in this?

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Full bridge port  single turbo motor aiming for 500hp eventually

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Nice, thats going to be fun in that chassis


Lähetetty minun G8141 laitteesta Tapatalkilla

Yep, although I'd rather not have it at full power until it has a cage in it

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Yes, thats true, easy way to get your self killed I reckon.
I wonder how much its going to weight tho?

Cause my Vert is going to be deathtrap and yours has better chassis but might be heavier

Lähetetty minun G8141 laitteesta Tapatalkilla

[re japi]

R3 gearbox is different than earlier 6 speeds. Earlier are made by Aisin and R3 is Mazda. 5 speed is basically same that FD has...

Mounts and lengts, I dont know for sure

Lähetetty minun G8141 laitteesta Tapatalkilla

[re japi]

Just checked and rx8 5 speeds are about 100 to 150 quid, might have to start collecting a few for storage as I will no doubt break the input shaft at some point

I think with using an rx8 gear box Clive told me I have to use a clutch from an FC RX7?

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Yes, FD has different type of clutch than FC and 8 has. Push/pull...

I suggest that you use 8's parts cause they are much cheaper than FCs or FD's

Lähetetty minun G8141 laitteesta Tapatalkilla