how much psi?

srt4reese · #1 04-21-2009, 08:08 PM

i got a 04 srt 4 wit mxp full exhaust,aem intake,boost control,stage 1,bigger fmic,agp waste gate, n hard pipes. i was worried how must psi i can run witout hurting nothin??

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slickwillie · #2 04-21-2009, 11:04 PM

you really need to get a wideband, but till you get one I would stay at 17 psi or below

mxrnick · #3 04-22-2009, 04:20 PM

yea i would say 17 is the magic number too

srt4reese · #4 04-22-2009, 05:11 PM

so if i get a wideband wat a safe number? thanks

mxrnick · #5 04-23-2009, 04:14 PM

not much more than 17 maby 19 u need to build the engine with forged internals to go much higher.

LilSparkPlug · #6 04-30-2009, 10:11 AM

Factory fuel system? You can't hold any more than 16psi to redline without running too lean.

jnmopar71 · #7 05-22-2009, 11:52 AM

what about stage 2 injectors and walbro fuel pumpa????

sarguy01 · #8 05-29-2009, 08:23 AM

Quote:

Originally Posted by jnmopar71

what about stage 2 injectors and walbro fuel pumpa????

Then you need something to control the fuel injectors with. Stage 2 injectors + 255 LPM + Stock PCM = Pig rich car running like ****e.

lblackneon · #9 05-31-2009, 03:41 AM

A safe number on the Wideband would be 16 with wide open throttle. Make sure you boost your car to 25 lbs though.
The car will run great!!!

Just kidding. A safe number on the wideband would be 11.8-12.0

70x7 · #10 06-02-2009, 03:25 PM

17-18psi.

The spike is great and all for torque and neck snapping, but the continuous power is better..aka, a stiffer wga which will hold boost longer in the higher rpms. Of course, you need alot more fuel to hold that up top. On stock turbo, I was never able to reach more than 14-15psi at redline though. But it would be a gradual decrease and not a quick drop off.