Can mx5 performance be improved much?

davekmoore · Postby **davekmoore** » Sun Apr 13, 2014 10:30 pm

Welcome. Search the forum. Quickly. Before someone less diplomatic than I am jumps in.

shuey · Postby **shuey** » Sun Apr 13, 2014 10:41 pm

http://store.automotiveplus.com.au/p/8725479/mx-5-nc-gt-plus-supercharger-kit.html

Postby **tomli123001** » Sun Apr 13, 2014 10:44 pm

Hi mate, welcome.
Not sure about 13 year model NC. I know some NC models come with 2 CAT converters, one at the header exhaust manifold and one at the mid pipe. By changing to an aftermarket header, it will remove that unnecessary CAT 1 and increase a lot more torque I heard from a club member.

Also, check some NC garage chats here (Garage Chat in the main index section). They have done a lot of work to NC and you can see their results there. I think something else could be a lower diff ratio to 4.1. This will have more torque multiplier and make you rev better, especially the latest NC has higher REV limited at 7.5k vs 7k of older NC. Interested to know if the cabin induction works well on the later NC, does it sound nice?

Finally I think a set of racing beat sway bars and lowered springs, you will be really sweet and maybe adding a set of KUHMO KU36 semi slick tyres. US forum reported the factory Bilstein shocks really good, don't waste them going to coil over on such new car.

I would not change air filter or box on NC. They have good cold air duct in the front of car already and paper filter does not pollute the hot wire MAF

Postby **NitroDann** » Sun Apr 13, 2014 10:51 pm

How deep are your pockets?

Which gears don't you want traction in?

Which ferrari's do you want to embarrass?

Dann

16bit · Postby **16bit** » Sun Apr 13, 2014 11:19 pm

2.0 duratec engines can produce over 600whp (heavily built).

as usual the engine is not the problem but all the other bits after it - gear box, prop shaft, diff, drive shafts etc.

but in a pretty stock form 300hp is not too hard.

http://www.bellengineering.net/product_ ... cts_id=357

that appears to be good for 250whp.

with a 3 inch zorst maybe more.

as dann said - hp = money + time over wife

Postby **NitroDann** » Sun Apr 13, 2014 11:21 pm

16bit wrote:hp = money + time over wife

I wish.

tescoking · Postby **tescoking** » Sun Apr 13, 2014 11:32 pm

I think supercharge is better than turbocharge on NC since the car is new and in good condition. And yes I am sure there will be performance gain but when you mean improve. What is your goal? How much horsepower do you want to have at the end? Check out Flyin miata. You will be able to find all the info you need. You might also contact them, they are amazing, they answered all of my questions for my car.

sailaholic · Postby **sailaholic** » Mon Apr 14, 2014 6:13 am

Power dosent rip chassis in half around corners it's the weight of a bus engine with out reinforcing.

Turbo charging an NC is hard due to space restrictions we have in Australia with RHD. Supercharging is easier and more proven route.

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Magpie · Postby **Magpie** » Mon Apr 14, 2014 6:41 am

Why is the 0-100 so important?

Have a look here and see how much HP you need http://www.060calculator.com/

The MX5 Plus supercharger will give you around 180 rwkw.

Nevyn72 · Postby **Nevyn72** » Mon Apr 14, 2014 8:40 am

hangar18 wrote:Thanks so much guys for all the info! I had no idea its possible to get so much extra power out of the MX5, am guessing it should be possible to do 0-100 in about mid 5 secs with the right set up. One thing I wish to avoid though, is the extreme scenario of those two guys who put a bus engine into a small car! The power was so great it ripped the chassis in two when going round a corner!

You don't need to worry about shoehorning an over sized engine into your car, a modest rotary conversion should achieve the results you're looking for.

Perhaps you could just mimic the modifications they're doing to an NC at Automotive+ and add a bit more if it's not enough for you..... :wink:

Here it is! :mrgreen:

taminga16 · Postby **taminga16** » Mon Apr 14, 2014 9:12 am

If you are serious about going fast (0 to 100 kph) buy a bike or a V8 taxi but if you want to be quick, move away from you current circle of influence and put some time into the MX before you do anything else.
Greg.

Jeo · Postby **Jeo** » Mon Apr 14, 2014 10:59 am

Built, turbo, LS7. Report back.

Or just go buy a Viper and be done with it. Or turbo that...

Postby **NitroDann** » Mon Apr 14, 2014 11:31 am

There are plenty of turbo NC's with great results, just none in australia because everyone is scared of FI NC's because of bad stories from the past and you cant get an off the shelf manifold, you need someone like me to make you one.

Ive had a few almost commitments, a turbo one would have been done a year ago for certain if it werent for the owner getting posted halfway across the country.

And I would expect 0-100's in the 3's not 5's.

Dann