Upped The Boost, Ecu Not Happy

[R338OY]

I recently added a manual boost controller on my basically stock R33, its now running 11psi. When i crank it up to 12psi it goes a little harder on boost, at about 3500-4000rpm, but i feel hesitiation from the engine like it misfires or something . It 'feels' like the air/fuel mixture's a tad lean, without actually measuring it.

Anyone know what this is?

I read a thread saying the stock ECU goes nuts past 10psi - do i need a piggyback system/complete computer replacement with a dynotune to fix this???

[paulr33]

its the standard ecu protection, youll need a piggyback, ecu change or remap to work around it

do a search for r&r protection or boost cut or fuel cut

anyone of those terms will lead you to the same result that its the stock ecu protection itself from too much airflow

[abu]

When you raise the boost they start to run rich as a safety precaution.

Its only best to raise boost once you have supporting modifications, but in most cases when you put on a 3" turbo back exhaust, and FMIC you usually get an automatic increase in boost.

I suggest you get a FMIC and a 3" turbo back exhaust on there.

12- 13psi on standard turbo and ECU would probably be about the best it will get. Anything more than that and you will start to eiter get ping/fuel cut outs and all other types of shit on standard ECU.

12 - 13psi

3" turbo back exhaust

FMIC

Fuel pump

That will be fine, then if you want a tune, like an SAFC II which is a fuel only computer or an E-MANAGE. Basically some sort of engine management..

But about 14psi is the max you'd run your stock turbo on, other wise there is a high chance it will blow.

Edited September 11, 2007 by abu

[craked]

hey if you want to go an after market ecu come see as at A&B motorsports we will hook you up a mad deal

[tek_01]

can do it on the cheap like i have and get a fuel cut defender, lets you adjust your reading from your afm to fool the ecu, hence no more rich and retard

installed and adjusted on the dyno shouldnt cost you more than $300

[tek_01]

can do it on the cheap like i have and get a fuel cut defender, lets you adjust your reading from your afm to fool the ecu, hence no more rich and retard

installed and adjusted on the dyno shouldnt cost you more than $300

[R338OY]

The fuel cut def. sounds like a good choice. I'm not sure if i wanna go for it as a long term mod cause it sounds kind of restrictive, in terms of being able to adjust power like a Power FC can (which does cost a helluvalot more ).

Should i just wait to get a good ECU tune? Or just go the PCD?