Out with the turbo, in with the v6

"AestheticsInMotion" (aestheticsinmotion)
02/06/2017 at 00:10 • Filed to: Swaaaap

I bought a Honda v6 J series engine from a wrecked Acura (yes it’s vtec, yo) and once it’s in I will never get passed by a Camry again. In fact, I’ll be fast. Straight line fast. In a Miata. Okay I’m going to need a minute....

The reason I decided to ditch the turbo plans is because naturally aspirated Miata is best Miata. Find me a build thread with a Turbo and I’ll show you pages of cooling problems. Also, v6 swap is just a lot cooler. You see very few whereas Turbo is the go to power adder. Doesn’t hurt that the engine swap should end up being significantly cheaper than the turbo buil.

I drove one of superfastmiatas’ v6 swapped cars last week and holy mother of God it’s all I’ve ever wanted. Absolute rocket ship and the balance is still fantastic. it’s hard to complain with 300 hp 300 ft/lbs of tourqe. Stay tuned.

http://www.superfastmiatas.com/JV6%20Miata%20Kit.html

DISCUSSION (17)

G_Body_Man: Sponsored by the number 3 > AestheticsInMotion
02/06/2017 at 00:13

Oh damn, that’s pretty hot. At what RPM will you make VTEC kick in?

TheHondaBro > AestheticsInMotion
02/06/2017 at 00:14

J32?

Are you planning a manual? If not, good luck. The J-series engines are notorious for eating automatic gearboxes.

AestheticsInMotion > G_Body_Man: Sponsored by the number 3
02/06/2017 at 00:17

I’m going to be completely honest, I actually have no idea what VTEC is. But I know I have it!

Venomous t-virus ectoplasmic contaminate..?

AestheticsInMotion > TheHondaBro
02/06/2017 at 00:18

Manual. There will be no automatics in this engines future

G_Body_Man: Sponsored by the number 3 > AestheticsInMotion
02/06/2017 at 00:19

It’s a relatively simple form of variable valve timing that switches to a more aggressive cam profile when you hit a certain RPM.

interstate366, now In The Industry > TheHondaBro
02/06/2017 at 00:26

There are companies that make adapters for J-series engines to bolt to Miata gearboxes.

chaozbandit > G_Body_Man: Sponsored by the number 3
02/06/2017 at 00:27

I think on the J series, its around 3K. A bit later for the bigger displacement ones.

TheD0k_2many toys 2little time > AestheticsInMotion
02/06/2017 at 00:36

Thats all you get for 3500? Dang

Glad im ls swapping a RX7. way cheaper

AestheticsInMotion > TheD0k_2many toys 2little time
02/06/2017 at 01:04

My thoughts exactly. I’m probably going to do more of a home brew, I’m just using their info as a guide.

Ls Swapping an rx7... Yeah. That would definitely work. Now you need something to swap the rotary into

HFV has no HFV. But somehow has 2 motorcycles > AestheticsInMotion
02/06/2017 at 02:25

I can dig it. With a few mods a J32 DNA make as much power as a new V6 Mustang, while keeping the whole car under 2500lbs. Sure you’re adding weight, but a turbo, and an intercooleradd weight too.

What transmission are you going to use? I’m guessing the stick Miata box can’t angle that much power. Edit: just read the product discretion, still not sure I’d trust it tho.

Looks like the hardest part will be modifying the intake plenum. Since the factory location for the throttle body is right where the firewall will be.

TheD0k_2many toys 2little time > AestheticsInMotion
02/06/2017 at 02:29

I bought it as a shell with no rotary so thats why im swapping it lol

AestheticsInMotion > HFV has no HFV. But somehow has 2 motorcycles
02/06/2017 at 02:42

Engine alone is only a 40 lb gain, I’ll be working pretty hard to keep supporting mods lightweight. That said with the giant boost in power... I may even consider adding some “luxury” features.... Upgraded sound system, extra insulation... Who knows.

Transmission should be good, from what I’ve been reading 300-325 is about the sweet spot for maximum power. Over 350 is where you have to swap transmissions every track day. And this is more of a street car anyways so the wear and tear should be a bit less.

Yeah that was my thought too. Not 100% sure what I’ll do about that yet

Wrong Wheel Drive (41%) > AestheticsInMotion
02/06/2017 at 07:46

YEsssss I love kswapped miatas! They sound so good. I imagine this will sound just as awesome as those. This is why I wish Honda and Mazda would team up to make a super roadster. Honda can supply the motor and Mazda can build the chassis/suspension.

Roadster Man > AestheticsInMotion
02/06/2017 at 08:27

Awesome! I’ve always wanted to do a cool NA swap in a Miata, my fantasy engine was the F20C...

HFV has no HFV. But somehow has 2 motorcycles > AestheticsInMotion
02/06/2017 at 09:42

It looks like some people are just, flipping the intake around to fast forward, but Honda used quite a few intakes on the engines, so who knows which ones work, and which don’t

Any way good luck, this looks like an awesome idea. I had always thought the S20000s F20 would be the best engine in a Miata, but with the J it’ll be a torque monster so that should be lots of fun.

AestheticsInMotion > Wrong Wheel Drive (41%)
02/06/2017 at 10:08

I would totally get behind that. And inside that

gawdzillla > AestheticsInMotion
02/06/2017 at 11:19

i’d have gone with the GM LFx if I really want a V6