[ShadowVir]

Hey guys I'm sorry if this as been answered already but i could not find it anywhere. I was wondering if i could put the speed 3 engine and tranny into my 2008 6i. Mechanic cost wont be an issue, so i was wondering how "easy" it would be. Some of my questions are.
Would there be any issues with the inter cooler fitting under the hood.
As i understand both cars have the same inline 2.3L engine, is it directly bolt on
Is the 5 speed mtx bolt on as well?
What else could i use from the donor speed 3?
Would i need to buy anything else or could it all be taken from the donor car?
Thank you for reading and helping me out.

 

[OrangeVirus Tuning]

The 5spd transmission can't handle the extra power for very long. the 5 speeds are known for being weak.

You would need:
complete engine
turbo/exhaust /intake
wiring harness / ecu / cluster /
transmission / shifter assembly / shifter cables
axles / hubs

that's just the minimum. I don't know if the 6 bay is the same as the 3 bay, you might have to use a Speed6 transmission without a transfer case and block it off.

it's not an easy swap, and honestly not worth it. you'll end up paying 6-7K to have it done right, only to be at stock speed3 HP

 

[Jjkalai]

Why not find a used Speed6?

- Cheaper
- No headaches other than trying to find one
- AWD
- Rarity

The MZR 2.3 is the exact same as in the Speed 3 and you'll have to go FMIC in the regular 6. The 6's do not have the air duct to the TMIC like the speeds do.

 

[MrTea]

There's an owner in greece that did the MS3 trans swap on his turbo'd car and it worked out well for him.

Engine wise, the ecu/wiring would be the biggest issue. I'd suggest building your block and aftermarket tuning before suggesting trying to swap in a speed engine and getting it to work "correctly".

I agree that you are better off selling your car and buying a speed6 or 3 if you want it to be daily derivable at a decent price.

 

[SonicNutrition]

that's just the minimum. I don't know if the 6 bay is the same as the 3 bay, you might have to use a Speed6 transmission without a transfer case and block it off.

it's not an easy swap, and honestly not worth it. you'll end up paying 6-7K to have it done right, only to be at stock speed3 HP

It is the same transmission as the MS6 but with a different final drive. Also the "Transfer case" is really a power take off unit and with it removed would require a custom made inner CV shaft.

But you are correct, it is a waste of money and effort.

 

[RiveraJ]

In order to make speed 3 transmission work on a fwd Mazda6, You would need the following:
Mazdaspeed 3 - intermediate shaft, clutch, flywheel, and ofc transmission. And also from A mazdaspeed6 (LHD) left side axle, wheel hub and wheel bearing.

This setup will only work best with a built boosted 2.0/2.3/2.5 mzr/duratec.
Add my IG - Nitsuj.6
(Growing to make this build 1of1, with a built 2.5 and speed3 trans hopefully aiming to high 600hp)