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Ahhhh! R33 Gtst + Greddy Profec B Spec Ii

SargeRX8

By SargeRX8,
in Engines & Forced Induction

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SargeRX8 Grand Master

SargeRX8

Posted
Posted

Ive had this thing in my car since I bought it. The guy I bought it from had it set to ROUGHLY 14psi but it would over boost. Ive been playing around with settings for what, 3 months? And still can't get it to work properly.

I had it at one point set to 20%, 5%, 11psi, 14psi, 15% but the piece of shit wont let me hold boost. It goes up and drops, up and drops. I managed at one point to get it to work without hitting the limiter but it would only work on low boost.

Ive tried literally every set of settings I could find to get the thing to run 14psi. The current settings I'm using which I got from some UK skyline forum(and are good for 1bar/14psi) are 44%, 25%, 11.5psi, 15psi, 20%.

Ok so my limiter is set to 15% yet it will still boost to 16psi peak... SOMEONE HELP ME BEFORE I TEAR THIS THING OUT OF MY CAR!

I need settings. Ill put my engine specs here.

NEW turbo with the latest Garrett 3071 ball bearing turbine

Nismo 550cc injectors

Z32 AFM

Nismo Fuel pressure regulator

Trust profec B spec 2 electronic boost controller

Apexi Power FC

Front mount intercooler with custom aluminium piping

Kakimoto catback exhaust

Stainless steel dump pipe

High flow cat

Tomei Adjustable exhaust cam gear

Bosch 040 fuel pump

I dont need links to how to sites. I NEED SETTINGS!!!

SargeRX8 Grand Master

SargeRX8

Posted
  • Author
Posted

I figured that but 1.7psi over the limiter. I was losing traction and straight away backed off because I knew it was too high. My car's high boost is designed to run 16 - 17 psi but its not tuned for that level yet so I'm trying to keep it safe and healthy. I need someone to monitor my boost gauge so I can properly get some WOT and see what boost I maintain.

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted (edited)

you cant copy other peoples settings, its different for every car.

start with the gain and set gain set as low as they go, and set the limiter 3-4psi above your target boost and the % limiter thing down low. then start winding the boost up til you reach close to your target. then wind in gain until it spikes then back it off a touch. after all that set the start boost (set gain) to 2-3psi below your target boost, if it spikes set it a bit lower.

if all else fails, find somewhere in your area who knows what they're doing to have a look for you

Edited by JonnoHR31

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