Safe boost level

[loserkidwac]

Well i have had my MSP for a little over a year now and have conlcuded that it has had a fault wastegateacctuator since I bought it and has gottne worrse with time. So i ordered a new adjustable acctuator and a MBC. I plan to eventually pick up a Split Second/fastDSM AFC but am waiting to free up some funds. My question si, stock the MSP runs 6.5 psi but does so on a very rich fuel map causing boggy when at WOT, has anyone tunred up to 7 or 7.5 psi and compensated for the overly rich fuel map and ran the car safely? I am not new to turbos and know you need to tune the car when you turn up the boost but just curious since the MSP run rich what the results where...

My MSP is stock, other than some Deso iridium plugs and a Homedepot catch-can...any input would be appriciated, thanks...Matt

 

[orng1]

The super map as I understand is tuned up to 10psi and people are very happy with that.

 

[loserkidwac]

The super map as I understand is tuned up to 10psi and people are very happy with that.

Yes I have read about the using the AFC and being safe up to 8 -9 psi with stock set-up but I'm curious if anyone has run higher than stock boost with out any upgrades including the AFC...

simpe question is it safe to run 7 psi on a stock MSP...

 

[Dugg E Fresh]

I upped mine with the "spring" on the WGA and my AFR's are right in line. Mine is NOT flashed tho. I have heard that takes away fuel, and that is something that I definately do not want. I spike to about 10 and it backs off to 8.5 down to 8 through redline. I will be checking the plugs in the spring as I am running the stockers, but they looked beautiful last fall. That was not too long after I upped it a little tho, so I will be interested to see what they look like. I imagine I'll go one step colder.

Edit: I do stumble a lil bit 'round town with some hesitation. I can live with that tho, she seems to pull real smooth @ WOT.

 

[loserkidwac]

Oh cool, my car has been flashed, it was before I bought it, maybe I'll grab some colder plugs and up the boost a little and see if I can get a happy medium...

 

[orng1]

There are too many variables to definately say whether it is safe or not to run a certain amount of boost. I have spent a long time trying to find the spot where the car is happy and I am happy with the boost that I run. I know that if I ever blow my engine it was my fault but I can deal with that. I say as long as you can do that go ahead and raise the boost. I am running it now at 10psi with most of the supporting mods and I am happy, but it is not safe and I know that.

 

[loserkidwac]

Yes I was looking for if someone had found the boost where the car was happy since it was pig rich from the factory, i guess no one has an answer, I don't beat on this car anyways its my DD just would like it to move when i step on it and not bog down, thanks for the info guys...Matt

 

[chrisstutz]

Yes I was looking for if someone had found the boost where the car was happy since it was pig rich from the factory, i guess no one has an answer, I don't beat on this car anyways its my DD just would like it to move when i step on it and not bog down, thanks for the info guys...Matt

I have a Turbo XS MBC and I have my Spicey spiking at 10.5 and settling in around 8.5 or 9 pounds. I have it dialed in perfect with no fuel cut off. I just ordered a Perrin fuel rail ($145) and some 440 injectors ($400). That should help out a little too.

 

[fr0st]

I have a Turbo XS MBC and I have my Spicey spiking at 10.5 and settling in around 8.5 or 9 pounds. I have it dialed in perfect with no fuel cut off. I just ordered a Perrin fuel rail ($145) and some 440 injectors ($400). That should help out a little too.

if you put 440's do you need to tune the ECM ? or just let it like that?

 

[kamon8404]

44o injectors are plug and play.

 

[chrisstutz]

Yeah, what he said.^ But as of 30 minutes ago on 01/27/2007 my 2003 Spicey Speed Protege blew the motor. Rod through the oil pan. I didn't get a chance to put on the Perrin Fuel Rail and 440 injectors and for some reason I had a bad PSI spike to around 15 or so. Don't know why. I am going to start a thread. Please visit it guys!

 

[smo0f]

the flash changes timing, not fuel. and for me, it took more than 12 psis to lower the afr, but even so, it used to peg at 10 at WOT after 4k rpm. weird car/ecu.

 

[chrisstutz]

Just please be careful...trust me!!

 

[Dugg E Fresh]

the flash changes timing, not fuel. and for me, it took more than 12 psis to lower the afr, but even so, it used to peg at 10 at WOT after 4k rpm. weird car/ecu.

So, would I be better off getting it flashed? Is it better to change up the timing? I don't mind the stumble now and again, & like I said my AFRs seem to be right in line, running 8-8.5 psi steady. I do plan on doing more mods and I do run it pretty hard sometimes. Oh well, EMS to come soon.

Chris, that fukn sux man. I'll look for the thread.

 

[chrisstutz]

So, would I be better off getting it flashed? Is it better to change up the timing? I don't mind the stumble now and again, & like I said my AFRs seem to be right in line, running 8-8.5 steady. I do plan on doing more mods and I do run it pretty hard sometimes. Oh well, EMS to come soon.

Chris, that fukn sux man. I'll look for the thread.

My car is flashed, and I like or liked it
I had no problems at all till my mishap yesterday. I think my actuator went bad. Come to think of it my cars boost was creepin a little higher everyday. Thanks though. I will keep you updated.

 

[Notorious_V.I.C]

Can you guys back up if stock psi on the MSP is 5psi? That's what I am boosting at and it will spike rarely to 6psi.

How do u know if you have a bad or faulty acuator? Boost spikes all the time, or doesn't hold boost?

 

[Wbriggs19061]

i would think both would be signs of a faulty acuator, and if it dont hold boost it could be a vacuum leak...some one correct me if im wrong..

 

[JDM Sam]

Certain MSP's are set differently for different boost levels. The OEM Mazda actuator is adjustable. 5-6 psi is not out of the ordinary.

A bad actuator causes a lopey idle and boost spikes in the double digits and usually throws a CEL lean code.

Adding more boost will not help your rich situation.
Do it right and get it tuned. A tuned car at stock boost can make up for increased boost untuned and power delivery will be a lot smoother.

 

[PlatinumMSP]

Can you guys back up if stock psi on the MSP is 5psi? That's what I am boosting at and it will spike rarely to 6psi.

How do u know if you have a bad or faulty acuator? Boost spikes all the time, or doesn't hold boost?

I'm curious where you have your boost guage tapped. Also the canadian version of the msp actually came with 5psi being stock, so it could possibly be one of those if you didnt buy the car new....i believe msp wastegate can be adjusted back to 6.5psi, if not, you could always use the spring mod for an extra 2 psi, or a boost controller... Its probably better that its at 5psi, at least you'll be less likely to blow your motor from normal driving! Get that FMIC on there bro!

btw, your going to have even less boost after you put that giant thing in.

 

[Notorious_V.I.C]

I'm pretty sure I bought the car new, I got to test-drive it the day after it came off the truck at the dealership.

I got the car in late September 03. It's a 2003.5...
Oh well as long as it's not messed up I'll be relocating my tapped area when i find my vaccum block.