So i have had my 5 for a few months now and am just about to finish painting it so im now looking to gain some BHP.



So im going down the turbo route and i want to know what would happen if i bolted a turbo on with out any fuel or new ECU.

2. what your views on rising fuel pressure regulator. i have heard they ruin your MPG and as mine is a daily driver i need the MPG.

3. are you able to just remap the stock ECU.

thanks guys i have been reading up on this for a long time and im just working it all out before makeing my mainifold and finding a turbo and start to build up my kit.

 

Terrible things.

More of the same.

Nah.

Don't lie to us.

 

 

lol. no i have been reading for a long time. the one thing im stuck on is the fueling. and the issue is most foums just say dont do this and do this instead of saying WHY not to do this.

So guys why should i not use a rising pressue reglator and why cant i use the stock ECU. just so i understand more why to go down the piggyback or standalong ECU route

 

OK fine.


Why shouldn't you use an FMU? Because they're garbage.

Why can't you use the stock ECU? Because it's for a stock motor making stock power, naturally aspirated.

Why shouldn't you use a piggyback? Because they're garbage.

Why should you use a standalone? Because they're awesome.




Why didn't you already know all these things? Because you haven't done a damn bit of research yourself.

 

Adjustable Fuel Pressure Regulator - Miata Turbo FAQ

 

I echo concealer's answers. You sound as though you still have a whole lot of learning to do. Especially if you are planning to turbocharge your DD. For that to even be a feasible option you need to COMPLETELY understand how every part of your turbo system operates, the possible problems that could occur, and be able to answer simple questions like these yourself.

This is coming from someone who is about to swap in a fully built motor with a big boy turbo setup into my primary vehicle. Every time I touch my car on the weekend it has to be back together and running Monday morning. This requires a complete understanding of what I am getting myself in to and a lot of help from friends on this forum. You can't half *** this **** and expect good results that you will be satisfied with on a DD.

 

Because NB.

Because it has no clue what to do when you go into boost.

 

The Stock ECU is not Tuneable.... the Rising rate FPR isnt tuneable either... You will either be too rich, or too lean... no in between across the entire RPM range.
The stock injectors arent capable of fueling with a turbo. adding the FPR just increases the pressure to the injectors, FORCING them to give more fuel... WAY over their efficiency threshold. One day, an injector is going to Quit opening, and your motor will go boom....
And based on the questions you have asked thus far, That pretty NB you have there, will be no more than a paperweight if it blows, Because a rebuild would be WAY out of the question

 

Did you paint the car without primer/prep?

 

Cheers supercooper just the sort of awnsers i was looking for. unlike the other people here

and no the paintwork was great to start of with so just good scotch over and paint why you ask

 

They all said the same thing basically... im just more bored... haha

You HAVE to have a standalone, and some accomidating injectors. there is a small list of some things you can skimp on, and those 2 are NOT on that list

 

He was comparing doing shitty prep work for a turbo setup to do shitty prep work for paint. The results will suffer tremendously. You should purchase a standalone (megasquirt preferably) and some injectors and get it running NA before you take any further steps to turbocharge the car.

 

oh guys so whats the most cost effect stand alone ECU out there. dont want cheep cheep but dont want to throw all that money at a meggascurt. what about a microsqurt

 

I would suggest not turboing your vehicle.

 

Most cost effective way would be to build your own megasquirt 3, but I wouldn't suggest that after what I've seen in this thread so far....

So I'd suggest https://www.miataturbo.net/ms-labs-m...ms-labs-69930/

 

You are not getting around spending about $1000 on some sort of MS and a wideband. The sooner you realize that and accept it, the easier it will be for you.

 

 

You can find them for pretty cheap on this forum in the classifieds. If you cannot justify spending $300-$400 for an ECU then you really should not be turbocharging a vehicle because you have no chance of doing it right. That is dirt cheap as far as engine management goes.