Max boost psi?

[lokalmotive]

Does anyone know what is the most psi the stock internals can handle in the MS3? I know ppl in the MSP had trouble with 10 psi without upgrading internals and others parts. I'm just looking at doing all the supporting mods to boost more but was wondering if anyone has done enough research to know what the motor can handle without having to go forged inside.

 

[06_AtenzaKid]

i heard it good to stay at 16psi with stock turbo itself maybe 17...

 

[lokalmotive]

I know the MSP was set at 6 or so stock and that with the correct mods you could boost up to 8-9 psi on stock internals. Just trying to figure out if the MS3 is going to be similar or if it's a little tougher motor. I've got a Perrin MBC sittin on my dresser I was going to install on my MSP but never got around to it and was just going to use it on the MS3 or sell it and buy an EBC. Haven't decided yet. I'm just not looking to have a whole in the side of the block anytime soon! Haha. Thanks for the input tho. Anyone else know anything about this?

 

[justa4banger]

Why don't you be the first to findout how tough the motor really is

 

[06_AtenzaKid]

i dont think he wants to go from zoom to boom in 3.6 sec.

 

[mark404040]

i dont think he wants to go from zoom to boom in 3.6 sec.

(lol) (lol) (lol) (lol)

that's really funny to me

 

[MrTea]

given, different platform, but there are guys running 20psi in the speed6 on stock engine. as the 2nd poster said, the supporting mod for more boost is the turbo in this case. once you start going over 17psi the hot air just hurts the engine. seen a couple guys kill the speed6 with 18psi on the stock turbo, where guys are making 23psi runs with the ATP turbo on the car....cooler charger air is the big part.

 

[Speed_Racer]

I'm gonna go with 25ish just be a bit on the conservative side.

 

[Craighjr]

Well my prosport gauge reads 20.5 psi spike and the settles around 16 or 17. If thats correct then I think with better boost control you could run a steady 20 all day long. If Mazda allows 20.5 spikes why not right?

 

[lokalmotive]

i dont think he wants to go from zoom to boom in 3.6 sec.

You're right. I'm wantin to get somethin figured out on just how much I think I can do safely with supporting mods. I think I'm gonna bump it to about 18-19 psi when I start gettin some stuff ordered. I think I decided to sell the Perrin MBC too in favor of an EBC at that kind of boost. If anyone is interested PM me and we'll see what we can work out. Thanks again for all the input everyone! I really appreciate it.

 

[SwampAss]

mine settles @ 15psi in 3rd to about redline. It tapers just before 6500 though. In 5th and 6th is spikes quite a bit higher but still settles around 15psi. 1st and second are about 10psi max.

 

[MrTea]

keep in mind that a spike doesn't produce the head it would running 20psi all day long. that seems to be the big issue with that.

block is fine i think, it's the knock associated with the heat/tune that does the boom

 

[justa4banger]

I'm sure mazda put the smallest turbo they could get away with, so turbo lag would be minimal.

With right fuel/fuel system, turbo, IC and matching/needed items, you could run 25 psi i'm sure.......... With Race gas.
Maybe meth injection will get you to 25 psi. only one way to find out.
To see how much boost you could safely add , someoneneds to read the turbo compressor map. it won't lie.

 

[Bokerparts]

I'm sure mazda put the smallest turbo they could get away with, so turbo lag would be minimal.

With right fuel/fuel system, turbo, IC and matching/needed items, you could run 25 psi i'm sure.......... With Race gas.
Maybe meth injection will get you to 25 psi. only one way to find out.
To see how much boost you could safely add , someoneneds to read the turbo compressor map. it won't lie.

I am running 19-20psi with no problem. I do have a ETS TMIC and a ATP DP and GReddy Profec EBC. After 20 psi you loose power the miniature turbo blows to much hot air. The car runs sooo fat that you will have no problem with 19-20psi. My car runs 16-17 psi stock with the downpipe. But you will need a boost cut defender.

 

[CaSHMeRe]

wow... i haven't seen one person talk about tuning the car ....

this site is full of FI noobs man.

No one is worried about A/F levels while pushing up the boost ? MBC and EBC ain't gonna do s*** in the MS3. Its all controlled by the ECU, and without some type of scanning tool/piggy back/stand alone, ur playing russian roulette. Before turning up the boost, why don't you tune the mods you already have and spend your money on a good software to tune with ? Too much boost (without being properly tuned) will only hurt you more in the end.

and Craighjr, boost spike is NOT a good thing.

EDIT: And to add. Stock Boost in the MS3.

1st gear - 9 lbs.
2nd gear - 11 lbs.
3-6th gear - just under 16 lbs.

you guys need to do research on the car you all own.

 

[justa4banger]

Well i don;t mention A/f due to the fact its should be common knowledge that you need to tune the a/f , but SINCE we all know the MS3 runs pig rich from the get go, i'm betting adding a few psi of boost won't lean it out to bad.

I do agree some kind of tuner is required, but hell i'm waiting for the first post that state" i ran 20psi and blew my motor".

 

[gsrtype1]

is spiking to 20psi over reving the turbo? some guy told me when you lesen the backpressure on the exhuast the turbo spools faster and can over rev cuasing your turbo to ware out in about 10,000 miles . does any on one anything about this?

 

[Equinox]

With Xede tune my car runs 15psi in 1st and 2nd, 18psi in the rest of the gears.

 

[boost_me]

wow... i haven't seen one person talk about tuning the car ....

this site is full of FI noobs man.

No one is worried about A/F levels while pushing up the boost ? MBC and EBC ain't gonna do s*** in the MS3. Its all controlled by the ECU, and without some type of scanning tool/piggy back/stand alone, ur playing russian roulette. Before turning up the boost, why don't you tune the mods you already have and spend your money on a good software to tune with ? Too much boost (without being properly tuned) will only hurt you more in the end.

and Craighjr, boost spike is NOT a good thing.

EDIT: And to add. Stock Boost in the MS3.

1st gear - 9 lbs.
2nd gear - 11 lbs.
3-6th gear - just under 16 lbs.

you guys need to do research on the car you all own.

Preeeeach on!
Church!!!

 

[CaSHMeRe]

is spiking to 20psi over reving the turbo? some guy told me when you lesen the backpressure on the exhuast the turbo spools faster and can over rev cuasing your turbo to ware out in about 10,000 miles . does any on one anything about this?

what you are asking is very hard to explain. Spiking is not "over reving" the turbo. When you have a decrease in back pressure and no increase in the charge itself. What essentially ends up happening is "boost spike" Your wastegate isn't opening like its supposed and how its controlled by the ecu, so when you boost spike, the ecu over compensates, and normally (within .5 -1.5 seconds) realizes whats going on then sends a signal to open. Several things can occur with boost spike.

1. Your ecu recognizes it and open it up to the factory setting.
2. Because your ecu read it so high, it over compensates, and opens it until it drops BELOW factory boost cut.
3. your ecu does nothin and you blow ur engine up from running to lean.

With Xede tune my car runs 15psi in 1st and 2nd, 18psi in the rest of the gears.

I heard some good things from Xede, especially with being able to get over the boost issues in first and second. what are your a/f's looking like ?