no boost what to check ?

Reply Subscribe

Thread Tools

Search this Thread

Sep 15, 2015 | 02:59 PM

chevybayboy

Thread Starter

TECH Fanatic

iTrader: (6)

Joined: Jul 2012

Posts: 1,308

Likes: 10

no boost what to check ?

Ok just got done installing my d1sc setup and my and gauge isn't reading anything even when I give it a little gas. My blow off valves are staying closed as well. I'm using the -2 supercharger spring. I'm pulling vacuum from the brake power booster if that helps any Tha KS in advance

Sep 15, 2015 | 05:48 PM

conan

TECH Senior Member

iTrader: (5)

Joined: May 2004

Posts: 6,492

Likes: 6

From: Back in the Burg

Are you driving the car or just throwing some rev's at it in neutral ?

Sep 15, 2015 | 06:39 PM

slocaddy

TECH Fanatic

Joined: Jan 2010

Posts: 1,074

Likes: 17

From: sarasota fl

Somebody stole the procharger?? Dam ricers.....

Is your gauge known to be good/ good connections?

Last edited by slocaddy; Sep 15, 2015 at 06:45 PM.

Sep 15, 2015 | 09:21 PM

sweet99ss

10 Second Club

iTrader: (41)

Joined: Apr 2010

Posts: 1,907

Likes: 6

From: Plains Ks

Quote:

Originally Posted by conan

Are you driving the car or just throwing some rev's at it in neutral ?

This^. You won't build boost sitting there without a load.

Sep 16, 2015 | 06:43 AM

ramairetransam

TECH Junkie

iTrader: (18)

Joined: Aug 2005

Posts: 3,462

Likes: 75

From: Amsterdam Ny, the good part

do you have one or two valves . what kind of valve or valves?

Sep 16, 2015 | 08:06 AM

The Alchemist

UNDER PRESSURE MOD

iTrader: (19)

Joined: Nov 2001

Posts: 10,813

Likes: 15

From: Doylestown PA

no boost what to check ?

You will in fact build boost free reving, it's not a turbo.

Ate you sure you got the correct rotation blower? Post a pic of the compressor wheel.

Sep 16, 2015 | 09:32 AM

forcd ind

TECH Veteran

iTrader: (7)

Joined: Sep 2007

Posts: 4,188

Likes: 292

From: woodbine, md

You say a little gas-what RPM
Depending on its pulley size, you may need higher RPM
Go out and drive it

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

Verdad Gallardo

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

Pouria Savadkouei

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

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

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

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Sep 17, 2015 | 08:02 AM

Fall Line

Teching In

iTrader: (5)

Joined: Aug 2009

Posts: 46

Likes: 0

From: Tewksbury, MA

Quote:

Originally Posted by The Alchemist

You will in fact build boost free reving, it's not a turbo.

Ate you sure you got the correct rotation blower? Post a pic of the compressor wheel.

While free rev'ing the engine pulls a vacuum, this keeps the recirc/bov open so you dont build boost. At least that's how my D1SC setup works. Now if I give it a quick mash of the throttle I could see a boost spike until the engine catches up.

Sep 17, 2015 | 08:10 AM

#10

The Alchemist

UNDER PRESSURE MOD

iTrader: (19)

Joined: Nov 2001

Posts: 10,813

Likes: 15

From: Doylestown PA

Quote:

Originally Posted by Fall Line

I have a TiAL blow off valve, with a 12lb spring in it, so when I hit the throttle, my TiAL closes, and it builds boost. This makes for a much more responsive setup. If you rev the motor to 4000rpm quickly, it will close the bypass valve and make boost IF the blower is spinning the right direction and you don't have other issues.

The first thing he needs to do is confirm he has the right blower setup, then pressure test the system to ensure that he doesn't have a massive leak somewhere.

Sep 17, 2015 | 09:26 AM

#11

ramairetransam

TECH Junkie

iTrader: (18)

Joined: Aug 2005

Posts: 3,462

Likes: 75

From: Amsterdam Ny, the good part

you must be one of the few running a blow off valve . What made you do that over the procharger race valve like i have .

Sep 17, 2015 | 11:01 AM

#12

The Alchemist

UNDER PRESSURE MOD

iTrader: (19)

Joined: Nov 2001

Posts: 10,813

Likes: 15

From: Doylestown PA

The Tial blow off valve is just like the Procharger race valve except I can adjust the spring inside to determine how soon it closes. I like that it closes as soon as I roll into the throttle, it makes for a very responsive drive and I find it's easier to modulate power that way.