Is my buddy being dumb?
 

My friend Wilbert got his 99 Mx-5 this morning and he's going out later today to pick up the turbo. He plans to run it on 5psi. when I told him about what you guys said about MSPNP he told me his dad said he wouldn't need it because it's running such low boost... He's a really close friend and I don't want to see his car go up in smoke, should I try and stop him or will his car be ok? I do trust his dads judgement he's good with engines (helped me build my turbo sc2).

Pretty much all engines from the factory can handle up to 8psi but its the fuel management. Your buddy should at least have a fpr.

fuel pressure regulator?

Yarp. Just ask your friend to join up here so he can learn the error of his ways.

I take it your name is Wilbert?

https://www.miataturbo.net/forum/t44045/
Nice, he has the same boost goal as you.


I'm just calling it as I see it. Read the stickies.

You had a turbo saturn and you don't know what a FPR is?

"You had a turbo saturn and you don't know what a FPR is?" just making sure, I don't remember all the acronyms. and yes he has somewhat of the same goal. I know what your implying and no I'm not asking for me and yes I'm reading the stickys. it's to late anyway hes already started installing.

and my name is Chris...

A '99 has a returnless fuel system so an AFPR would not be in the cards. At that low boost level, try looking into larger injectors, control for them, and timing retard.

to notice any apreciable horsepower he will need a way to manage shit botom line.

If he just wants a turbo for shits and giggles and to say that his car is turbo-ed then go for it, just slap that shit on there and go. If he wants to maintain a reliable car and have it last for years to come, fork over some cash on a legit management.

Learn something new errday.

I really don't think it's going to last long, first thing he does is hops in the car and revs it up to set off the bov...

It won't last long. He needs some sort of fuel management. He could get away with a FM voodoo box at that low boost level with stock injectors but for the money he should atleast go with a DIYPNP. It will allow him to have full control of fuel, ignition timing, electronic boost control, knock detection, launch control and many other things.

Or... he can just learn the hard way.

"starts the car and revs to hear bov"....:facepalm: No hope for this one.

His dad may be somewhat educated but that wont stop his (sounds to be ricer) son from making some dumb ass choices.

Yes you can get away with low boost apps if you are aware and smart about it, but its ALOT more dangerous.

The miata has no way of sensing boost so it doesn't know that it should be adding more fuel. On the early cars a AFPR was used to add more fuel, on the later cars you either run a piggy back system that "tricks" the ECU into adding more fuel, or you run a proper engine management system and control everything the right way.

Make sure he's running 93.

Jesus dude, show him this thread at least. This is a bunch of people experienced with turbo Miatas saying exactly what he must do to save his engine and make power (which is the entire point of turbocharging, right?).

I bet the engine was cold when he was revving to hear the BOV too, yikes. Anyone out there need a rebuildable NB engine?

Explosions are fun.

where are you located? I'd love to get a 99 shell......


trade plus cash for my already turbo NA? lol

Problem solved, way cheaper.