So first off here's my setup: Funnel mod air box, removed turbo discharge silencer, modified TB transition casting and Saab sport exhaust ... and oh ya, the "$35 manual boost controller" as it's come to be know around here.

here's my situation: i've noticed a wired "moan" sound (almost sounds like muffled honking geese, but only one prolonged noise). It occurs in every gear as i can tell but only under particular cricumstances:

1. RPS's @ 3000-4500
2. Steady 55-75% throttle
3. seems to be excentuated when going up hill
4. only occurs for about 200-500 rpm's worth of tach travel.

so anyone ever heard of this? or anyone have this happen to them?
it doesn't sound like a 'bad engine' noise or anything like that, it just doesn't sound nice. i didn't notice it until after all these mods, but the airbox, silencer, casting and manual BPC valve all were done over like 2 weeks (or 2 weekends as the case was).

my best guess is that i caused some wierd harmonic in my induction system. wondering if anyone knows different or has any ideas. I'd like to get rid of it (while keeping all mods of course). thanks for input

chris
'94 900 SET 89k
'87 900 turbo -RIP

• Funky intake moaning... can anyone help (esp. Dean & mod-ers), cl, Mon, 4 Jun 2001 21:45:34 <-- Viewing This Message
  • my stock '95 SET has "always" done that, MJM , Tue, 5 Jun 2001 08:55:31
  • Wow! I was going to post the same thing today, Joshnat, Tue, 5 Jun 2001 08:52:14
  • Re: Funky intake moaning... can anyone help (esp. Dean & mod-ers), Will Andrews, Mon, 4 Jun 2001 22:51:30
    • that was my first thought..., cl, Tue, 5 Jun 2001 00:05:35
      • It is the bypass valve., Dean, Tue, 5 Jun 2001 09:11:50
        • hey dean..., cl, Wed, 6 Jun 2001 00:43:23
        • One source of 'better' by-pass valves...., REM in Seattle , Tue, 5 Jun 2001 16:48:09
        • Dean, where can you get a different bypass valve? n/m, Joshnat, Tue, 5 Jun 2001 16:20:08
        • Re: It is the bypass valve., Saabster , Tue, 5 Jun 2001 10:11:23

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

• Prev by Date: replace or upgrade parking brake housing?, Picard, Mon, 4 Jun 2001 21:25:23
• Next by Date: Got some clunking going on too... any insight?, cl, Mon, 4 Jun 2001 21:54:02
• Main NG900 & OG9³ Bulletin Board

StateOfNine.com

SaabClub.com

Jak Stoll Performance

M Car Covers

Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)