recommended boost level

[Jason97GS-T]

I just installed this MBC (NXS Motorsports EBAY (nxsmotorsports))

My question is what is the recommended boost level I should be running with my setup?

I set it right now at 14psi (which took about a half an hour to get )

Any comments are welcome. Thanks

Jason

 

[kenamond]

If all is well with your car, 14psi might be okay, but I'd recommend you get a logger. Then you'll have a better idea. I'd rewire your stock fuel pump, too. You might be leaning out on the top end, and your A/F gauge won't tell you (unless it's wideband). "Lean" at full boost is 11:1 or 12:1, and a narrowband AFR gauge will not tell you that.

 

[turbomatic]

Depends on the size of your injectors. If your running stock 450s I wouldn't go over 16lbs. If you have 560s or above your good for around 20lbs but you will need something to tune with and also need to upgrade your fuel pump.

 

[Jason97GS-T]

If all is well with your car, 14psi might be okay, but I'd recommend you get a logger. Then you'll have a better idea. I'd rewire your stock fuel pump, too. You might be leaning out on the top end, and your A/F gauge won't tell you (unless it's wideband). "Lean" at full boost is 11:1 or 12:1, and a narrowband AFR gauge will not tell you that.

I only have narrowband, but I am getting the wideband soon. I didnt know about the difference till after I bought and installed it . I am also saving up for a logger. I am trying to follow the upgrade path on this website, and it says that a logger is for stage 2. I am a newb and I have no idea about rewireing the stock fuel pump. Is it hard or easy to do? If easy I might be able to to if I have the right tools. What is needed for a rewire?

 

[All_Boost16G]

Check out Forced Performance, they have a awsome looking Rewire kit, pretty much plug and play. That what I'm planning on getting because I hate wiring things.

 

[Jason97GS-T]

Depends on the size of your injectors. If your running stock 450s I wouldn't go over 16lbs. If you have 560s or above your good for around 20lbs but you will need something to tune with and also need to upgrade your fuel pump.

I have stock injectors. I also plan on upgrading my fuel pump. I am saving up for this Extreme PSI Fuel Management Kit

 

[Jason97GS-T]

Check out Forced Performance, they have a awsome looking Rewire kit, pretty much plug and play. That what I'm planning on getting because I hate wiring things.

Is it this kit FP Fuel Pump Relay Kit

 

[JEFFREYCASTGSX]

Right now i would lower the boost to a safe 12 psi. After you get a rewire kit or a 190 fuel pump then maybe 15 psi. You have no idea what your car is doing at those boost levels, especially with narrowband. If you do go higher than 15 then you wont gain anything, since that turbo will be maxed out.

 

[Dsmj89]

Looks like you are on stock turbo still, so i would recommend no higher than 15 psi. If you wish to go higher, which is pointless on the t25 cause it will drop back down to 10-11 psi after whatever it spikes, i would recommend installing at least a walbro 190 for extra insurance.

 

[kenamond]

You can buy a kit for the rewire, or you can do it yourself. It's a pretty simple thing. If you've wired a stereo, you're more than qualified to rewire the pump. Here's a how-to for 2gs.

2G DSM FWD Fuel Pump Rewire Instructions

A logger and PDA will cost you about $150 or so. I have pocketlogger, but a lot of DSMers have started using EvoScan. EvoScan seems to be able to log a lot more types of data and at a higher rate than pocketlogger. I would consider a logger before you increase boost past stock levels. Just remember that all a logger does is record what the ECU is seeing from its various sensors. It'll also read and clear engine codes for you.

 

[Jason97GS-T]

Thanks for all of your comments on this. I am going to set it back down to 12psi just to be safe until I get a new fuel pump and logger