K20 mx5

[curtis265]

Interestin - subbed. Any reason why Honda K series?

[madjak]

Interestin - subbed. Any reason why Honda K series?

Seems to be a good match for the car. High powered light engine around the same size that can get good clean power with a nice sound. There are other Honda motors I suppose, but this kit makes it easy to fit a K20 / K24 without doing all the hard work getting it to fit. There are lots of nice bolt on upgrades to the engine and lots of info out there on how to get power out of them.

[stndrd]

Good to see some guys in Oz are looking into these recently released conversions.

I have a JDM K20A & a K20Z1 with Z4 pistons and a JDM cylinder head/cams for sale if you are interested

[SHOGUNOVDDRK]

http://www.k20a.org/forum/showthread.php?t=112309

do it OP

[thomwootton19]

Dude buy a dc2r motor

[SHOGUNOVDDRK]

Dude buy a dc2r motor

Engine spins the wrong way iirc and he can't adapt an mx5 box to it.

Go hard OP, we'd like a build thread here also.

[curtis265]

Why would you B when you can K if it's already going to be custom work?

[madjak]

I actually have access to a cheap K20A3... I know they aren't ideal, but what can be done to them that's cost effective and will bring the power up to the 200-220 hp mark? Or are they really not worth looking at? Are there items that I can install on a K20a3 that I can reuse later on better base. Things like flashing the ECU to a honda k-pro, cams etc.

I was thinking I could build the car and get it running the the K20A3, whilst I source and build a higher power K20a motor. Given the cost of this build I think I would probably look to get a little more power out of the engine than I was originally planning. I may as well go the whole hog if I'm going to do this. I've already sourced a 6 speed box for the mazda which I'm going to put into it for this year. The 6 speeds can handle mode torque / power so it will be more suitable when I do the engine conversion.

[u mad?]

k20a3 are fukin shit. might be ok while you source/build another engine though. not worth trying to get power out of.

Those mx5 6 speed are the same as the rx8 gearbox if im not mistaken, seem to be good for around 400 or so hp.

[PHO]

K20a3 is a potato.

[hondapop]

Hook it up to an alloy V8. There's sure to be a yank that's done it.

[madjak]

Hook it up to an alloy V8. There's sure to be a yank that's done it.

here is the link to the V8 Conversions http://www.flyinmiata.com/V8/ and they are actually quite common. I have run against a few V8's in my little 1.6 and I'm only a few seconds off their track times. It's hard to get everything balanced with a V8 in such a small chassis.

So it's not really my thing. If I want power I'd turbo a 1.8l Mx5 engine... but I prefer drive-ability of NA over turboed power any day.