Forced Induction Superchargers | Turbochargers | Intercoolers

mondo blow off question

Thread Tools
 
Search this Thread
 
Old Aug 26, 2006 | 02:15 PM
  #1  
SilverGhost's Avatar
Thread Starter
Motorboater
iTrader: (53)
 
Joined: Dec 2001
Posts: 7,731
Likes: 1
From: Chi-town
Default mondo blow off question

i run a vortec mondo blow off or whatever the hell it is on my setup.

i've always had it so the valve seems to be wide open at idle, the force of air coming from the thing at idle will blow your hat off if you stick your face over it and when i'm driving the car my friends say all you can hear while you are driving next to the car is the blow off whoooosing away.

is that how its supposed to be or do i have the thing improper? it was suggested to me that it should be closed at idle, etc to be proper. car only sees 11 PSI with a 3.4 pulley on the blower and SDCE 8 rib,too, thought it should see more, maybe the blow off not being setup right has to do with that? thoughts?
Reply
Old Aug 26, 2006 | 02:27 PM
  #2  
White.Lightning's Avatar
TECH Addict
iTrader: (53)
 
Joined: Mar 2005
Posts: 2,863
Likes: 1
From: Aston, PA
Default

I think I have read before the valve should be adjusted so it just starts to bleed off air at idle. Someone correct me if I am wrong.

Good luck
Andy
Reply
Old Aug 26, 2006 | 02:36 PM
  #3  
97M6Formula's Avatar
TECH Fanatic
iTrader: (6)
 
Joined: Oct 2002
Posts: 1,838
Likes: 0
From: Lake in the Hills, IL
Default

sean.. thought a blow off valves main purpose in life was to open once boost exceeds your current set limit to avoid either over boosting, and blowing off your intake when you let out of it

jst
Reply
Old Aug 26, 2006 | 03:18 PM
  #4  
kp's Avatar
kp
8 Second Club
iTrader: (34)
 
Joined: Nov 2001
Posts: 10,852
Likes: 1
From: Knoxville, TN
Default

Its not a blow off valve its a bypass valve.

It should be wide open at idle and should be adjusted almost all the way out so it opens as soon as possible. They make a lot of noise driving around if they are open, you can make a muffler for it or route it back into the inlet if the noise bothers you..
Reply
Old Aug 26, 2006 | 04:57 PM
  #5  
97M6Formula's Avatar
TECH Fanatic
iTrader: (6)
 
Joined: Oct 2002
Posts: 1,838
Likes: 0
From: Lake in the Hills, IL
Default

I guess I forgot to log out at Jason's house...
Reply
Old Aug 26, 2006 | 05:08 PM
  #6  
Urban Legend's Avatar
TECH Cry Baby BOSS APPROVED!
iTrader: (5)
 
Joined: Jul 2005
Posts: 5,799
Likes: 2
Default

It is supposed to be open at idle. Mine sounds like an air compressor that is leaking air. The Mondo is louder than the Procharger itself. You can also put an air filter on it to quiet it down. Mondo bpv and high stall equals a lot of daily looks. More than I like.
Reply
Old Aug 30, 2006 | 10:07 PM
  #7  
SilverGhost's Avatar
Thread Starter
Motorboater
iTrader: (53)
 
Joined: Dec 2001
Posts: 7,731
Likes: 1
From: Chi-town
Default

oh yeah, its def louder than the blower, its all you can hear under the hood most of the time. i don't really care, its my friends bitching at me when we're cruising that had me wondering about it lol. for fun i might put a small air filter on it and see if i like it better that way
Reply
Old Aug 30, 2006 | 10:22 PM
  #8  
DeltaT's Avatar
TECH Addict
iTrader: (5)
 
Joined: Jun 2005
Posts: 2,404
Likes: 1
Default

Mine dumps down directly back into the blower inlet adapter shown in my sig. I still hear it at cruise - a whistling noise, but not nearly as bad as when I had it to the open air. Plus if it's open, you need an air filter because otherwise it's feeding unfiltered air into the motor.

Jim
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Aug 30, 2006 | 10:23 PM
  #9  
Urban Legend's Avatar
TECH Cry Baby BOSS APPROVED!
iTrader: (5)
 
Joined: Jul 2005
Posts: 5,799
Likes: 2
Default

Originally Posted by SilverGhost
its my friends bitching at me when we're cruising that had me wondering about it lol.
Gotta keep the fans happy.
Reply
Old Aug 31, 2006 | 05:35 AM
  #10  
White.Lightning's Avatar
TECH Addict
iTrader: (53)
 
Joined: Mar 2005
Posts: 2,863
Likes: 1
From: Aston, PA
Default

Originally Posted by SilverGhost
i don't really care, its my friends bitching at me when we're cruising that had me wondering about it lol.
Doesn't the saying go:

Get in, sit down, SHUT UP, and hold on?

LOL
Andy
Reply
Old Sep 3, 2006 | 02:50 PM
  #11  
SilverGhost's Avatar
Thread Starter
Motorboater
iTrader: (53)
 
Joined: Dec 2001
Posts: 7,731
Likes: 1
From: Chi-town
Default

yeah except they aren't in the car. they are in their cars driving next to me and they say its all they can hear lol
Reply
Old Sep 4, 2006 | 01:40 AM
  #12  
ty_ty13's Avatar
7 Second Club
iTrader: (42)
 
Joined: Jun 2004
Posts: 4,558
Likes: 0
From: paducah, ky
Default

Originally Posted by SilverGhost
yeah except they aren't in the car. they are in their cars driving next to me and they say its all they can hear lol
hmmm sounds like blower envy to me
Reply




All times are GMT -5. The time now is 03:18 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE