Pfc, Full Exhuast, Non-ported Wastegate

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04-08-2003 | 01:56 AM

JimmyJimboJet

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Joined: Nov 2002

Posts: 1,113

From: Wi nøt trei a høliday in Sweden this yër?

i plan on installing a midpipe and catback in a few weeks, right before i go to the strip. i doubt i'll have time to port the wastegate before going to the strip, and i was worried about boost spike w/ the midpipe and a non-ported wastegate for a few runs. should just leave the midpipe off until i port the wastegate? since i have a PFC (able to control boost), i would think it would be fine for a few days as long as i didn't up the boost with the commander, right? i will have more than enough time to port the wastegate after the races, so that is definitely going to get done. i just don't want to take any chances with my engine while i'm pushing it hard. TIA

mods so far: downpipe, and one lardass sitting in the driver's seat trying to lose weight.

04-08-2003 | 02:14 PM

j9fd3s

Senior Member

Joined: May 2002

Posts: 22,465

From: California

if you only have a dp mp than the boost should be ok, if you add an intake or cat back and it might be kinda borderline

mike

04-08-2003 | 07:47 PM

vosko

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Joined: Jul 2001

Posts: 17,839

From: NJ

kahren has dp .mp, stock catback and its fine

04-09-2003 | 12:27 AM

amp

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Joined: Jan 2002

Posts: 3,928

From: New Jersey

had full exhaust with tuned pfc on blacky..

and only saw 1psi of intermittent spike at wot..

id work on fuel before concerning yourself with the wastegate

04-09-2003 | 01:26 AM

JimmyJimboJet

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Senior Member

Joined: Nov 2002

Posts: 1,113

From: Wi nøt trei a høliday in Sweden this yër?

thanks for the input guys. I just have a limited amount of time before i go to the strip (less than 2 days), and i didn't want to start something that i couldn't finish in time.

04-10-2003 | 07:33 PM

jackdhammer

Senior Member

Joined: Jan 2003

Posts: 283

From: Oxnard, CA.

I have intake, D.P., M.P., Racing Beat cat back(which is pretty conservative as far as exhausts are concerned) and a PFC. I was worried about the same issues so I turned the boost down to like .70 from .85 and I turned the wastegate cycle % setting (can't remember what it's called) way down also. Mine has CREPT to like .94. no noticeable spikes though. KAHREN has a set up for this problem but I haven't decided between that or a pop off valve yet. just thought I'd let you know.