Eaton m62 supercharger
 

Hello
I recently purchased a supercharged 99 miata. it has a eaton m62 supercharger installed with intercooler. It's running at 5psi boost and the previous owner told me, in order to increase that, I need to replace the pulley. I've been trying to do some research on this and am finding different answers everywhere. I'm fine with the car the way it is now, but just curious as how I'd go about increasing the boost to 9-10 psi.

Thanks

Which kit is it? BRP, Moss? Hot side, Cold side? I bought pulleys for a previous MP62 setup from Gary at http://trackdogracing.com/TDR-SC-PUL.aspx. Get in touch and they'll help you decide which ones you need.

Either one will point you in the right direction.

BRP, and I'm pretty sure hot side (not 100% sure)

It's BRP and hot side, although I'm not 100% sure about the hot side. How do I check?

Hotside means it's on the exhaust (right) side of the engine, looking from the front. Coldside means it's on the intake (left) side.

https://1drv.ms/i/s!ArGcOIBZVETn0nQ9uAWq8LQ2IND1

it's definitely hotside then. So all I have to do is get a ~115-125mm pulley and I should be good? No other parts required? No messing around with the computer chip card thing in the car? As you can tell Im new to cars and boosting and whatnot

In for part out....

Thanks for being so helpful thirdgen. I'm sure people think you're funny

If you have a powercard you may not have the injectors necessary to increase your boost or horsepower from the current level. You should determine how much headroom you have prior to proceeding.

First and foremost, you have to answer a few questions:

• What size is your current crank pulley?
• Do you have stock injectors with a fifth injector setup?
• How many powercards do you have?
• Do you have a wideband O2 sensor - or, "AFR gauge" in your car?
• What octane gas are you using?
• Have you ever checked to see if your intake system has any "boost leaks"?

There are more questions, but these are what comes to mind right away.

Now..
Yes, if you have a 5th injector setup and three powercards, you "can" run up to 10 12 psi boost.

And, that would require a few things:

• A bigger capacity fuel pump
• Re-tuning the engine (It's possible, but you HAVE TO find the right person to do that - fueling adjustment gets tricky)
• Colder spark plugs (BKR 7 series)
• WIDEBAND O2 SENSOR AND GAUGE (Don't even think about skipping this)
• Stronger clutch (Choices too numerous to list here)
• Biggered, largered exhaust
• Improvements for the cooling system
• Et cetera...

There is a huge difference between 5 psi and 10 psi boost in terms of engine management, fuel supply, cooling, power transmission and handling.
Power is really nice, but it does come at a cost.

If you just buy a bigger pulley and bolt that on, let me know.
I can also help you with a partout thread.

Thirdgen and godless commie are trying to tell you in the politest way possible, that if you just bolt on a bigger pulley, chances are very good that your engine will go boom.

You need to add fuel (at a controlled rate) or your engine runs lean, detonates and very quickly destroys itself.

Yes, rleete is right. I am in no way trying to be a dick, and you habe to understand the humor on this site. In fact, if you would like help from somebody as sophisticated as myself, I would be more than happy to help you.
Pretty much what we're saying is it sounds simple enough to just put a big pulley on and run 4 more pounds of boost than you're running, but that 4 more pounds of boost can do lots of damage. Especially because I'm pretty sure you have a power card or something which does not control timing at all, and it's a poor way to control fuel as well.
Please tell us more details about your setup. What kind of intercooler do you have? What size exhaust do you have? What are you using for a wideband?

Oh, and it's an MP62, btw.

Thanks for the replies. I asked help for something else before on the regular miata forum and encountered dicks, so I just assumed that's how forums are. But anyways, I will get all that info tomorrowish, or try to. Might have to ask previous owner about some of these things.

Mp62 on 5 psi might be maxing out stock injectors, or close.

I hope the car is a fun learning experience.

The people on this site are some of the most knowledgeable around for boosting miatas. They can be jerks sometimes though. :P

Once we know exactly what you have we can point you in the right direction to start researching how to upgrade though. Modifying cars at this level requires lots of research and learning or you risk a blown up engine.

Yea, of course. I'm not in any rush, in fact I don't even know if I want to do it as the car feels great now. But eventually people get bored with the amount of power available. I'm gonna take my time with this, do it right. Gonna infiltrate the local miata bro network and find some knowledgeable people

Just curious, What exactly is Murtaxa?
Is it Murtaza ot Murteza?

I highly recommend against this. The average Miata bros are complete morons. Stick around here, read a bunch, save a LOT of money, keep reading build threads. In about a year you will be ready to take on your dreams of moar boost.

PS, stay far away from anyone who uses tems like "slap on this" or " Re-flash that".