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Old 02-20-2010, 10:59 AM   #1
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Default 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).
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Old 02-20-2010, 11:06 AM   #2
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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.
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Old 02-20-2010, 11:35 AM   #3
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fuel pressure regulator?
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Old 02-20-2010, 11:41 AM   #4
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Old 02-20-2010, 11:57 AM   #5
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Quote:
Originally Posted by 00mx5se View Post
fuel pressure regulator?
Yarp. Just ask your friend to join up here so he can learn the error of his ways.
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Old 02-20-2010, 01:48 PM   #6
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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?
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Old 02-20-2010, 05:47 PM   #7
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"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.
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Old 02-20-2010, 05:56 PM   #8
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and my name is Chris...
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Old 02-20-2010, 06:01 PM   #9
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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.
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Old 02-20-2010, 06:26 PM   #10
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to notice any apreciable horsepower he will need a way to manage **** botom line.
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Old 02-20-2010, 08:37 PM   #11
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If he just wants a turbo for ***** and giggles and to say that his car is turbo-ed then go for it, just slap that **** 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.
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Old 02-20-2010, 09:49 PM   #12
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Quote:
Originally Posted by olderguy View Post
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.
Learn something new errday.
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Old 02-20-2010, 10:19 PM   #13
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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...
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Old 02-20-2010, 10:45 PM   #14
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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.
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Old 02-20-2010, 11:00 PM   #15
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Or... he can just learn the hard way.

"starts the car and revs to hear bov".... 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 *** choices.

Yes you can get away with low boost apps if you are aware and smart about it, but its ALOT more dangerous.
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Old 02-20-2010, 11:08 PM   #16
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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.
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Old 02-20-2010, 11:18 PM   #17
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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?
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Old 02-21-2010, 12:05 AM   #18
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Explosions are fun.
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Old 02-21-2010, 12:57 AM   #19
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where are you located? I'd love to get a 99 shell......


trade plus cash for my already turbo NA? lol
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Old 02-21-2010, 01:25 AM   #20
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Quote:
Originally Posted by Turbo_4 View Post
If he just wants a turbo for ***** and giggles and to say that his car is turbo-ed then go for it, just slap that **** 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.
Problem solved, way cheaper.

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